GTT-Technologies, Klaus Hack, Tatjana Jantzen
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1 Addition of K 2 O and Na 2 O to the Al 2 O 3 -CaO-FeO x -MgO-SiO 2 Oxide System, Technologies, Herzogenrath Klaus Hack, Tatjana Jantzen
2 Contents of presentation Introduction The FeO x -K 2 O and FeO x -Na 2 O binary systems The Al 2 O 3 -CaO-K 2 O ternary system The Al 2 O 3 -CaO-Na 2 O ternary system The proposed AlFeO 2 -AlKO 2 isopletal section The AlFeO 2 -AlNaO 2 isopletal section The Al 2 O 3 -K 2 O-MgO ternary system The Al 2 O 3 -MgO MgO-Na 2 O ternary system The CaO-Na 2 O-SiO 2 ternary system The Fe 2 O 3 -K 2 O-SiO 2 -O 2 system The Fe 2 O 3 -Na 2 O-SiO 2 -O 2 system The FeO-K 2 O-SiO 2 -Fe system The MgO-Na 2 O-SiO 2 ternary system The behaviour of (K,N) 2 C 3 A 5 in Al 2 O 3 -CaO-K 2 O-Na 2 O The Al 2 O 3 -Fe 2 O 3 -K 2 O-SiO 2 quaternary system Conclusions
3 Elephant s wedding Al 2 O 3 -K 2 O-Na 2 O-SiO 2 Al 2 O 3 -CaO-FeO-Fe 2 O 3 -MgO-SiO 2
4 Introduction The associate species containing K or Na were added in order to describe the liquid phase in the Al 2 O 3 -CaO-FeO x -MgO- SiO 2 system containing K 2 O or Na 2 O. The composition of the liquid oxide species are as introduced by Spear taking two moles of cations per associate. System Associate species FeO x K 2 O FeKO 2 FeO x Na 2 O FeNaO 2, (FeNa 2 O 2 ):1.5 Al 2 O 3 CaO Na 2 O (Al 10 Ca 3 Na 4 O 20 ):8.5 CaO Na 2 O SiO 2 (Na 2 Ca 3 Si 6 O 16 ):5.5 FeO x Na 2 O SiO 2 (FeSiNa 2 O 4 ):2
5 Modelling of new phases in binary sub-systemssystems System Phase Description Work Used data FeO x -K 2 O FeO x -Na 2 O FeKO 2 -HT FeKO 2 -LT Fe 12 K 2 O 19 Fe 22 K 2 O 34 FeNaO 2 (s4) FeNaO 2 -HT FeNaO 2 -LT FeNaO 2 (s) FeNa 2 O 2 FeNa 4 O 3 Fe 16 Na 10 O 29 (Fe 3+ )(K 1+,Va)(O 2- ) 2 (Fe 3+ )(K 1+,Va)(O 2- ) 2 stoichiometric stoichiometric stoichiometric (Fe 3+ )(Na 1+,Va)(O 2- ) 2 (Fe 3+ )(Na 1+,Va)(O 2- ) 2 stoichiometric stoichiometric stoichiometric stoichiometric Cp data from SGPS are used FeNaO 2 (s) from SGPS is used as basic H f [84Dai2]
6 Modelling of new phases in ternary systems System Phase Description Work Used data Al 2 O 3 -CaO-K 2 O K2C3A5 (K 1+,Va)(Ca 2+,K 1+ )(Al 3+ ) 2 (O 2- ) 4 Al 2 O 3 -CaO-Na 2 O N2C3A5 NC3A8 NC8A3 (Na 1+,Va)(Ca 2+,Na 1+ )(Al 3+ ) 2 (O 2- ) 4 Na 2 Ca 3 Al 16 O 28 Na 2 Ca 8 Al 6 O 18 Al O -Fe O -K O (Fe,Al)KO2-HT (Fe 3+, Al 3+ )(K 1+, Va)(O 2- ) AlKO 2 (s2)fzj (Fe,Al)KO2-LT (Fe 3+, Al 3+ )(K 1+, Va)(O 2- ) AlKO 2 2 (s) FZJ Al 2 O 3 -Fe 2 O 3 -Na 2 O (Fe,Al)NaO2-HT (Fe,Al)NaO2-LT (Fe 3+, Al 3+ )(Na 1+, Va)(O 2- ) 2 AlNaO 2 (s2)fzj (Fe 3+, Al 3+ )(Na 1+, Va)(O 2- ) 2 AlNaO 2 (s) FZJ
7 Modelling of new phases in ternary systems System Phase Description Work Used data Al 2 O 3 -K 2 O-MgO Al 2 O 3 -MgO-Na 2 O CaO-Na 2 O-SiO 2 Beta-prime (K 1+ ) 2 (Al 3+,Va) 2 (Mg 2+,Va) 3 (Al 10 O 8-19 ) K 2 Al 12 O 19 (Jülich) Beta-tri (O 2-,Va) 3 (Al 3+,K 1+ ) 2 (Al 3+,Mg 2+ ) 2 (Al 40 K 4 Mg 5 O 6-70 ) Beta-prime (Na 1+ ) 2 (Al 3+,Va) 2 (Mg 2+,Va) 3 (Al 10 O 8-19 ) Na 2 Al 12 O 19 (Jülich) Beta-tri (O 2-,Va) 3 (Al 3+,Na 1+ ) 2 (Al 3+,Mg 2+ ) 2 (Al 40 Na 4 Mg 5 O 6-70 ) NC2S3 (Na 1+,Va) 2 (Ca 2+,Va) (Na 2 CaSi 3 O 9 ) Na 2 CaSiO Na 2 CaSi 5 O 12 () Spear data 122 Na 2 Ca 2 Si 2 O Na 2 Ca 3 Si 6 O 16 () Spear data 213 Na 4 CaSi 3 O 9 () Spear data
8 Modelling of new phases in ternary systems System Phase Description Work Used data FeKO2-HT (Fe 3+, Si 4+ )(K 1+, Va)(O 2- ) 2 Fe 2 O 3 -K 2 O-SiO FeKO2-LT (Fe 3+, Si 4+ )(K 1+, Va)(O 2- ) 2 2 K2F2S3 Fe 4 K 4 Si 3 O 14 Kaliophilite-HT Kaliophilite-LT Iron-Leucite Fe 2 K 2 Si 2 O 8 Fe 2 K 2 Si 2 O 8 Fe 2 K 2 Si 4 O 12 Iron-Orthoclase Fe 2 K 2 Si 6 O 16 Fe 2 O 3 -Na 2 O-SiO 2 FeNaO2-δ FeNaO2-HT FeNaO2-LT (Fe 3+, Si 4+ )(Na 1+, Va)(O 2- ) 2 (Fe 3+, Si 4+ )(Na 1+, Va)(O 2- ) 2 (Fe 3+, Si 4+ )(Na 1+, Va)(O 2- ) 2 Acmite N5F1S8 N6F4S5 Fe 2 Si 4 Na 2 O 12 Fe 2 Si 8 Na 10 O 24 Fe 8 Si 5 Na 12 O 28 FeO-Na 2 O-SiO 2 NFS FeSiNa 2 O 4 MgO-Na 2 O-SiO 2 Roedderite NM2S6 NMS4 NMS N2M2S3 Na 2 Mg 5 Si 12 O 30 Na 2 Mg 2 Si 6 O 15 Na 2 MgSi 4 O 10 Na 2 MgSiO 4 Na 4 Mg 2 Si 3 O 10
9 Modelling of new phases in quaternary systems System Phase Description Used data Beta-prime (K 1+,Na 1+ ) 2 (Al 3+,Va) 2 (Mg 2+,Va) 3 (Al 10 O 8-19 ) Al 2 O 3 -K 2 O-MgO- Na 2 O Al 12 K 2 O 19 (s) Al 12 Na 2 O 19 (s) from FZJ Al 2 O 3 -Fe 2 O 3 -K 2 O- Na 2 O-SiO 2 Al 2 O3-Fe 2 O 3 - K 2 O-SiO 2 Al 2 O 3 -CaO-K 2 O- Na 2 O Beta-tri (O 2-,Va) 3 (Al 3+,K 1+, Na 1+ ) 2 (Al 3+,Mg 2+ ) 2 (Al 40 K 4 Mg 5 O 6-70, Al 40 Na 4 Mg 5 O 6-70 ) (Al,Fe)(K,Na)O 2 -HT (Al 3+, Fe 3+, Si 4+ )(K 1+, Na 1+,Va)(O 2- ) 2 Al 2 O 3 -K 2 O- Na 2 O-SiO 2 (Al,Fe)(K,Na)O 2 -LT (Al 3+, Fe 3+, Si 4+ )(K 1+, Na 1+,Va)(O 2- ) 2 data from FZJ KAF4S3 (Al 3+,Fe 3+ ) 4 (K 1+ ) 4 (Si 4+ ) 3 (O 2-) 14 Al 4 K 4 Si 3 O 12 (s)fzj Kaliophilite-HT (Al 3+,Fe 3+ ) 2 (K 1+ ) 2 (Si 4+ ) 2 (O 2-) 8 Al 2 K 2 Si 2 O 8 (s2)fzj Kaliophilite-LT (Al 3+,Fe 3+ ) 2 (K 1+ ) 2 (Si 4+ ) 2 (O 2-) 8 Al 2 K 2 Si 2 O 8 (s)fzj Leucite (Al 3+,Fe 3+ ) 2 (K 1+ ) 2 (Si 4+ ) 4 (O 2-) 12 Al 2 K 2 Si 4 O 12 (s)fzj Feldspar (Al 3+,Fe 3+ )(K 1+,Na 1+ )(Si 4+ ) 3 (O 2-) 8 Al(K,Na)Si 3 O 8 FZJ (K,N)2C3A5 (K 1+, Na 1+,Va)(Ca 2+,K 1+, Na 1+ ) (Al 3+ ) 2 (O 2- ) 4
10 Proposed CaO-K 2 O and K 2 O-MgO phase diagrams CaO - K 2 O MgO - K 2 O T(C) T(C) HALITE HALITE HALITE + K 2O(s3) HALITE + K 2O(s3) 300 HALITE + K 2O(s2) K 2O/(CaO+K 2O) (g/g) 300 HALITE + K2O(s2) K 2O/(MgO+K 2O) (g/g)
11 Proposed CaO-Na 2 O and MgO-Na 2 O phase diagrams MgO - Na 2 O CaO - Na 2 O T(C) HALITE HALITE 1200 HALITE + Na 2O(s3) 1000 HALITE + Na 2O(s2) Na 2O/(MgO+Na 2O) (g/g) T(C) HALITE HALITE + HALITE + Na 2O(s3) 800 HALITE + Na 2O(s2) HALITE + Na 2O(s) Na 2O/(CaO+Na 2O) (g/g)
12 Binary Fe 2 O 3 - K 2 O phase diagram in air Natl. Bur. Stand. (US) Int. Rep., NBSIR (1979), pp E.R. Plante, H.S. Parker, R.S. Roth, C.D. Olson, Natl. Bur. Stand. (US) Int. Rep., NBSIR (1979), pp o C FeKO 2 -LT FeKO 2 -HT [77Tom] Fe 2 O 3 - K 2 O - O 2 p(o 2 ) = 0.21 atm 1700 [Romanov, Candela 1979] [Manning 1979] [Tomkowicz, 1977] SPINEL Fe 22K 2O V.P. Romanov, G.A. Candela, R.S. Roth, L.J. Schwartzengruber, J. Appl. Phys., 507 (1979), [10], pp T(C) ) FeKO2_HT Fe 12K 2O 19 Fe 12K 2O 19 + Fe 2O FeKO2_HT + K 2O(s3) 500 FeKO2_LT + K 2O(s3) FeKO2_LT 300 FeKO2_LT + K 2O(s2) Fe 2 O 3 /(Fe 2 O 3 +K 2 O) (mol/mol)
13 FeO-K 2 O phase diagram for equilibrium with Fe FeO - K 2 O - Fe Fe/(FeO+K 2 O) (mol/mol) = Fe(liq) 1500 BCC_A2 + BCC_A MeO + FCC_A1 + T(C) 1100 FCC_A1 + FCC_A1 + + FeKO2_HT FeKO2_HT 900 BCC_A2 + + FeKO2_HT 700 BCC_A2 + FeKO2_HT + K 2 O(s3) 500 BCC_A2 + FeKO2_LT + K 2 O(s3) FeKO2_LT 300 BCC_A2 + FeKO2_LT + K 2 O(s2) FeO/(FeO+K 2 O) (mol/mol)
![(1940), Atlas pp.67-84. (1995), p.75. Binary Fe 2 O 3 - Na 2 O phase diagram in air Atlas (1995), p.75. 760 o C 1010 o C 1250 o C FeNaO 2 (s) FeNaO 2 -LT FeNaO 2 -HT FeNaO 2 -δ [87Grey] Fe 2 O 3 - Na 2 O - O 2 p(o 2 ) = 0.](/docs-images/82/85477003/images/14-1.jpg "21 atm 1800 [R. Knick, E.")
![J. Kohlmeyer,1940] [J. Thery,1962] 1600 [I.E.](/docs-images/82/85477003/images/14-2.jpg "Grey,1987] SPINEL + 1400 FeNaO 2(s4) 1200 + Fe 2O 3 FeNaO2_HT T(C) 1000 Fe 16Na 10O 29 + Na 2O(s3) FeNaO2_LT + Na 2O(s2) 800 FeNaO2_LT + Na 2O(s2) R. Knick, E.J.")
14 (1940), Atlas pp (1995), p.75. Binary Fe 2 O 3 - Na 2 O phase diagram in air Atlas (1995), p o C 1010 o C 1250 o C FeNaO 2 (s) FeNaO 2 -LT FeNaO 2 -HT FeNaO 2 -δ [87Grey] Fe 2 O 3 - Na 2 O - O 2 p(o 2 ) = 0.21 atm 1800 [R. Knick, E.J. Kohlmeyer,1940] [J. Thery,1962] 1600 [I.E. Grey,1987] SPINEL FeNaO 2(s4) Fe 2O 3 FeNaO2_HT T(C) 1000 Fe 16Na 10O 29 + Na 2O(s3) FeNaO2_LT + Na 2O(s2) 800 FeNaO2_LT + Na 2O(s2) R. Knick, E.J. Kohlmeyer, Z. Anorg. Allg. Chem., 244 [1], (1940), pp FeNaO 2(s) FeNaO 2(s) + Fe 600 2O 3 FeNaO 2(s) + Na 2O(s) Na2O/(Fe2O3+Na2O) (g/g) J. Thery, Ann. Chim. (Paris), 7 [3-4], (1962), pp
15 FeO-Na 2 O phase diagram for equilibrium with Fe W. Dai, S. Seetharamab, L.-I. Staffansson, Metall. Trans. B, 15B, (1984), No.2, pp Fe(bcc) FeO - Na 2 O - Fe Fe/(FeO+Na 2 O) (g/g) = Liquid(Fe) [W.Dai, S.Seetharaman,1984] HALITE + Fe(fcc) + Fe(fcc) T(C) 1000 FeNaO2_HT HALITE + Fe(fcc) + FeNaO 2_HT + Fe(fcc) + Na 2O(s3) + Fe(fcc) + Na 2O(s2) FeNaO2_LT + Fe(bcc) + Na 2O(s2) HALITE + Fe(bcc) + FeNaO 2(s) FeNa 2O 2 FeNaO 2(s) + Na 2O + Fe(bcc) FeNa 4O 3 Na 2O + Fe(bcc) + FeNa 4O Na 2O/(FeO+Na 2O) (g/g)
16 Isothermal section at 1100 o C in Al 2 O 3 -CaO-K 2 O J. A. M. Van Hoek, F. J. J. Van Loo, and R. Metselaar, Mater. Sci. Monogr., 66B (1991), pp K 2 O - Al 2 O 3 - CaO 1100 o C K 2 O HALITE + + KAlO2_HT HALITE + KAlO2_HT + Ca3Al2O KAlO2_HT K2C3A KAlO2_HT BETA_PRIME KAl 9 O 14 Ca 3 Al 2 O Ca CaO 12 Al 14 O 33 CaAl 4 O 7 CaAl 12 O 19 Al 2 O 3 mass fraction CaAl 2 O 4
17 Liquidus surface in Al 2 O 3 -CaO-K 2 O L. T. Brownmiller, Am. J. Sci., 229(29) [171] (1935). K 2 O - Al 2 O 3 - CaO Projection () K 2 O [Brownmiller, 1935] HALITE KAlO2_HT K2C3A5 CaAl4O7 CaAl12O19 KAl9O Al 2O 3 CaAl 2O Ca 0.6 Ca12Al14O CaO 3Al 2O 6 Al 2 O 3 mass fraction
18 Proposed isopleth section K 2 Al 2 O 4 - CaAl 2 O 4 KAlO 2 - CaAl 2 O KAlO2_HT K2C3A5 + CaAl2O4O T(C) 1300 K2C3A KAlO2_HT + K2C3A5 K2C3A5 + CaAl2O KAlO2_LT + K2C3A CaAl 2 O 4 /(KAlO 2 +CaAl 2 O 4 ) (mol/mol)
19 Isothermal section at 1200 o C in Al 2 O 3 -CaO-Na 2 O H. Verweij and C. M. P. M. Saris, J. Am. Ceram. Soc., 69 [2] (1986). CaO - Na 2 O - Al 2 O o C Na 2 O HALITE NC8A3 N2C3A5 NaAlO2_HT Al 12Na 2O 19 NC3A8 Al 9NaO 14 Ca 3Al 2O 6 Ca 12Al 14O 33 CaAl 2O 4 CaAl 4O 7 CaAl 12O CaO Al 2 O 3 mole fraction
20 Isothermal section at 1400 o C in Al 2 O 3 -CaO-Na 2 O G. I. Zaldat, M. S. Kupriyanova, and A. L. Tubolev, Izv. Akad. Nauk SSSR, Neorg. Mater., 21 [1] (1985). CaO - Na 2 O - Al 2 O o C Na 2 O NaA aalo2_ht J. D. Hodge, in Proc. - Electrochem. Soc., High Temperature Lamp Chemistry, 1985, Vol. 85-2, pp , Edited by E. G. Zubler, The Electrochemical Society, Inc., Pennington, New Jersey, MeO + NC8A3 N2C3A NaAlO2_HT Al 12 Na 2 O 19 NC3A8 Al 9 NaO 14 Ca 3 Al 2 O 6 CaAl 2 O 4 CaAl 4 O 7 CaAl 12 O CaO Al 2 O 3 mole fraction
21 Isopleth section Na 2 Al 2 O 4 - CaAl 2 O 4 Na 2 Al 2 O 4 - CaAl 2 O [Verweij, 1986] [Brownmiller,Boque, 1932] 1800 NaAlO2_HT N2C3A5 + CaAl 2 O 4 T(C C) 1500 NaAlO2_HT + N2C3A5 N2C3A N2C3A5 + CaAl 2 O CaAl 2 O 4 /(Na 2 Al 2 O 4 +CaAl 2 O 4 ) (mol/mol)
22 Liquidusoberfläche in Al 2 O 3 -CaO-Na 2 O CaO - Na 2 O - Al 2 O 3 Projection () Na 2 O T(min) = o C, T(max) = o C Na 2 O(s3) NaAlO2_HT MeO NC8A3 N2C3A5 CaAl2O4 NC3A8 CaAl4O Al 9 NaO 14 Al 2 O 3 BETA_PRIME T o C Ca 3 Al 2 O 6 Ca 12 Al 14 O CaO Al 2 O 3 percent by weight CaAl 12 O 19
23 Proposed isopletal section FeKO 2 -AlKO 2 in air 2500 FeKO 2 - AlKO 2 - O 2 p(o 2 ) = 0.21 atm K(Fe,Al)O2_HT 1700 T(C) K(Fe,Al)O2_HT K(Fe,Al)O2_LT FeKO 2 /(FeKO 2 +AlKO 2 ) (mol/mol)
24 Isopletal section FeNaO 2 -AlNaO 2 in air Kh.N. Nurmangambetov, O.I.Arakelyan, S.A.Shcherban, Z.S.Karpenko, M.V.Tsvetkova, Izv. Vyssh.Uchebn,Zaved., Tsvetn. Metall., No.3, (1976), pp FeNaO 2 - AlNaO 2 - O 2 p(o 2 ) = 0.21 atm [Nurmangambetov,Arakelyan, 1976] (K,Na)(Fe,Al)O2_HT 1500 T(C) 1300 Na(Fe,Al)O2_HT Na(Fe,Al)O2_HT + FeNaO2_delta Na(Fe,Al)O2_LT 300 FeNaO 2 /(FeNaO 2 +AlNaO 2 ) (mol/mol) Na(Fe,Al)O2_LT + FeNaO 2(s)
25 Isothermal section at 1100 o C in Al 2 O 3 -K 2 O-MgO J. A. M. Van Hoek, F. J. J. Van Loo, and R. Metselaar, Key Eng. Mater., [Austceram '90] (1991). K 2 O - MgO - Al 2 O o C K 2 O HALITE + KAlO2_HT + HALITE + KAlO2_HT + SPINEL KAlO2_HT BETA_PRIME KAl 9O 14 BETA_TRI MgO SPINEL Al 2 O 3 mole fraction
26 Isothermal section at 1400 o C in Al 2 O 3 -K 2 O-MgO J. A. M. Van Hoek, F. J. J. Van Loo, and R. Metselaar, Key Eng. Mater., [Austceram '90] (1991). K 2 O - MgO - Al 2 O o C K 2 O HALITE + KAlO2_HT + HALITE + KAlO2_HT + SPINEL KAlO2_HT BETA_PRIME KAl 9 O 14 BETA_TRI SPINEL MgO Al 2 O 3 mole fraction (Al 40 K 4 Mg 5 O 70 ) -6 (O -2,Va) 3 (Al +3,K +1 ) 2 (Al +3,Mg +2 ) 2 =22Al 2 O 3. 2K 2 O. 5MgO
27 Proposed isothermal sections in Al 2 O 3 -K 2 O-MgO K 2 O - MgO - Al 2 O o C K 2 O HALITE + KAlO2_HT + HALITE + KAlO2_HT + SPINEL KAlO2_HT SPINEL MgO Al 2 O 3 mole fraction BETA_PRIME KAl 9 O 14 BETA_TRI K 2 O - MgO - Al 2 O o C 0.8 HALITE + KAlO2_HT + K 2 O KAlO2_HT KAl 9O 14 HALITE + KAlO2_HT + SPINEL SPINEL MgO Al 2 O 3 mole fraction
28 Isothermal section at 1500 o C in Al 2 O 3 -MgO-Na 2 O G. K. Duncan and A. R. West, Solid State Ionics, [Pt. 1] (1988). Na 2 O - Al 2 O 3 - MgO 1500 o C MgO [Duncan and West, 1988] HALITE BETA_TRI SPINEL (Al 40 Na 4 Mg 5 O 70 ) -6 (O -2,Va) 3 (Al +3,Na +1 ) 2 (Al +3,Mg +2 ) 2 20Al 2 O 3. 3Na 2 O. 7MgO 22Al 2 O 3. 2Na 2 O. 5MgO (Al 40 Na 4 Mg 5 O 70 ) -6 (O -2,Va) 3 (Al +3,Na +1 ) 2 (Al +3,Mg +2 ) 2 NaAlO2_HT Al 0.1 Na 9NaO 14 2 O Al 2 O 3 mole fraction BETA_PRIME
29 Isothermal section at 1600 o C in Al 2 O 3 -MgO-Na 2 O M. Alden, Solid State Ionics, 20 [1] (1986). Na 2 O - Al 2 O 3 - MgO 1600 o C MgO ag HALITE + Sla BETA_TRI SPINEL NaAlO2_HT Al9NaO14 Na 2 O Al 2 O 3 mole fraction BETA_PRIME
30 Isothermal section at 1680 o C in Al 2 O 3 -MgO-Na 2 O M. Alden, Solid State Ionics, 20 [1] (1986). Na 2 O - Al 2 O 3 - MgO 1680 o C MgO BETA_TRI SPINEL NaAlO2_HT BETA_PRIME 0.2 Al 0.1 Na 9NaO 14 2 O Al 2 O 3 mole fraction
31 Isothermal section at 1700 o C in Al 2 O 3 -MgO-Na 2 O J. A. M. Van Hoek, F. J. J. Van Loo, and R. Metselaar, Key Eng. Mater.,53-55 [Austceram '90] (1991). MgO - Al 2 O 3 - Na 2 O 1700 o C Na 2 O [Van Hoek, Van Loo,1991] [Weber, Venero,1970] HALITE NaAlO2_HT BETA_TRI BETA_PRIME SPINEL MgO Al 2 O 3 mole fraction
32 Isothermal section at 1700 o C in Al 2 O 3 -MgO-Na 2 O J. T. Kummer, "β-alumina Electrolytes"; Chp. 5; pp , in Progress in Solid State Chemistry, Vol. 7. Edited by H. Reiss and J. O. McCaldin. Pergamon Press (Elsevier Science Inc.), New York, New York, Na 2 O - Al 2 O 3 - MgO 1700 o C Na 2 O wt. % % Na 2O BETA_PRIME BETA_TRI + Al 2 O 3 + Al 9 NaO 14 + BETA_PRIME _TRI + BETA_ BETA_TRI 0.1 SPINEL + BETA_TRI Al 2 O M go wt.% Al 2 O 3
![Orthosilicate isopletal section in CaO-Na 2 O-SiO 2 G. K. Moir and F. P. Glasser, Trans. J. Br. Ceram. Soc., 73 [6], (1974), pp.](/docs-images/82/85477003/images/33-1.jpg "199-206 CaSiO 3 - Na 2 SiO 3 1600 1500 [Moir and Glasser, 1974] 1400 1300 + CaSiO 3(s2) T(C C) 1200 CaSiO 3(s2) + NC2S3 1100 + Na 4CaSi 3O 9 G. W. Morey and N. L. Bowen, J. Soc. Glass Technol.")
33 Orthosilicate isopletal section in CaO-Na 2 O-SiO 2 G. K. Moir and F. P. Glasser, Trans. J. Br. Ceram. Soc., 73 [6], (1974), pp CaSiO 3 - Na 2 SiO [Moir and Glasser, 1974] CaSiO 3(s2) T(C C) 1200 CaSiO 3(s2) + NC2S Na 4CaSi 3O 9 G. W. Morey and N. L. Bowen, J. Soc. Glass Technol., 9, (1925) CaSiO 3(s) + NC2S3 NC2S3 Na 4CaSi 3O 9 Na 4CaSi 3O 9 + SiNa 2O Na 2SiO 3/(CaSiO 3+Na 2SiO 3) (mol/mol)
![Isothermal section at 600 o C in CaO-Na 2 O-SiO 2 K.A. Shahid, F.P. Glasser, Phys. Chem. Glasses, 12 [2], (1971), pp.50-57. CaO - Na 2 O - SiO 2 600 o C CaO 0.4 0.5 0.](/docs-images/82/85477003/images/34-1.jpg "6 0.7 0.8 0.1 0.2 0.")
34 Isothermal section at 600 o C in CaO-Na 2 O-SiO 2 K.A. Shahid, F.P. Glasser, Phys. Chem. Glasses, 12 [2], (1971), pp CaO - Na 2 O - SiO o C CaO Ca 2 SiO 4 Ca 3 Si 2 O 7 CaSiO 3 (s) HALITE + Na2O(s) + SiNa4O NC2S SiNa Na 2 O 4 O 4 SiNa 2 O 3 Si 2 Na 2 O 5 SiO 2 mass fraction Phase Description Formula 111 Stoichiometric Na 2 CaSiO Stoichiometric Na 2 CaSi 5 O Stoichiometric Na 2 Ca 2 Si 2 O Stoichiometric Na 2 Ca 3 Si 6 O Stoichiometric Na 4 CaSi 3 O 9 NC2S3 Solid solution (Na 1+,Va) 2 (Ca 2+,Va)(CaNa 2 Si 3 O 9 2- )
35 Isothermal section at 770 o C in CaO-Na 2 O-SiO 2 G. K. Moir and F. P. Glasser, Phys. Chem. Glasses, 17 [3] (1976). CaO - Na 2 O - SiO o C CaO Ca 2 SiO 4 HALITE + Na2O(s2) + SiNa4O NC2S Ca 3 Si 2 O 7 CaSiO SiNa 2 O 3 Si 2 Na 2 O 5 (s3) Si 8 Na 6 O SiNa Na 2 O 4 O 4 SiO 2 mass fraction
36 Liquidus surface in CaO-Na 2 O-SiO 2 E. R. Segnit, Am. J. Sci., 251 [8] (1953). CaO - Na 2 O - SiO 2 Projection () CaO K.A. Shahid, F.P. Glasser, Phys. Chem. Glasses, 12 [2], (1971), pp HALITE SiNa4O4 Si2Na6O Ca 3 SiO 5 (s) Ca2SiO4(s2) Ca 3 Si 2 O 7 (s) [Zhang and Xiao, 2011] Ca 2 SiO 4 Ca 3 Si 2 O 7 CaSiO 3 Na 2 Ca 2 Si 3 O 9 Na 2 CaSiO 4 Na 2 Ca 2 Si 2 O 7 invariants Na 2 O SiO 2 mass fraction Ca 2 SiO 4 (s3) 122 NC2S3 CaSiO 3 (s2) CaSiO 3 (s) SiNa 2 O 3 Si 2 Na 2 O 5 Si 8 Na 6 O 19 Quartz 213 Cristobalite
37 Isopletal section in CaO-Na 2 O-SiO 2 G. K. Moir and F. P. Glasser, Trans. J. Br. Ceram. Soc., 73 [6], (1974), pp Na 2 Si 2 O 5 - Na 2 Ca 2 Si 3 O NC2S3 + CaSiO 3(s2) NC2S3 + CaSiO 3(s) + NC2S3 T(C) NC2S3 + Si 2Na 2O 5(s3) + NC2S3 + Na2Ca3Si6O16 NC2S3 + CaSiO 3 + Na2Ca3Si6O16 NC2S3 + Na 2Ca 3Si 6O 16 NC2S3 + Si 2Na 2O 5(s3) + Na 2Ca 3Si 6O Na 2 Ca 2 Si 3 O 9 /(Na 2 Si 2 O 5 +Na 2 Ca 2 Si 3 O 9 ) (mol/mol)
![Isopletal section FeKO 2 -SiO 2 in air R.S. Roth, Adv. Chem. Ser., No. 186,, (1980), pp. 391-408. FeKO 2 - SiO 2 - O 2 p(o 2 ) = 0.21 atm 1700 [Roth, McDaniel, Parker, 1977] 1500 1300 R.S. Roth, C.L.](/docs-images/82/85477003/images/38-0.jpg "McDaniel, H.S. Parker., Geol. Soc. Am. Abstr., 9 [7], (1977), p. 1149. (C) T( 1100 KFeO2_HT K2F2S3 KFS2-HT + Cristobalite KFS6 + Cristobalite 900 KFS2-LT KFS4 KFS6 KFS6 + Quartz 700 0 0.2 0.4 0.6 0.")
38 Isopletal section FeKO 2 -SiO 2 in air R.S. Roth, Adv. Chem. Ser., No. 186,, (1980), pp FeKO 2 - SiO 2 - O 2 p(o 2 ) = 0.21 atm 1700 [Roth, McDaniel, Parker, 1977] R.S. Roth, C.L. McDaniel, H.S. Parker., Geol. Soc. Am. Abstr., 9 [7], (1977), p (C) T( 1100 KFeO2_HT K2F2S3 KFS2-HT + Cristobalite KFS6 + Cristobalite 900 KFS2-LT KFS4 KFS6 KFS6 + Quartz mole SiO 2 /(FeKO 2 +SiO 2 )
39 Isothermal section at 600 o C in Fe 2 O 3 -K 2 O-SiO 2 in air G.T. Faust, Am. Mineral, 21 [12], (1936), pp G.T. Faust, Am. Mineral, 21 [12], (1936), pp Fe 2 O 3 - K 2 O - SiO 2 - O o C, p(o 2 ) = 0.21 atm SiO 2 K 2 Si 4 O 9 (s2) K 2 Si 2 O 5 (s3) K 2 SiO KFS6 KFS KFS2-LT Quartz + Fe 2 O 3 + KFS6 Phase Description Formel KFS2-HT Stoichiometric Fe 2 K 2 Si 2 O 8 KFS2-LT Stoichiometric Fe 2 K 2 Si 2 O 8 KFS4 Stoichiometric Fe 2 K 2 Si 4 O 12 KFS6 Stoichiometric Fe 2 K 2 Si 6 O 16 K2F2S3 Stoichiometric Fe 4 K 4 Si 3 O 14 KFeO2-HT Solid solution (K 1+,Va)(Fe 3+,Si 4+ )(O 2- ) 2 KFeO2-LT Solid solution (K 1+,Va)(Fe 3+,Si 4+ )(O 2- ) KFeO2_LT + K 2 O(s3) + K 2 SiO 3 KFeO2_HT K 2 O Fe 2 O 3 mole fraction Fe 12 K 2 O 19
![Isothermal section at 850 o C in Fe 2 O 3 -K 2 O-SiO 2 in air A.P. Protsyuk, G.A. Konechnyi, L.G. Latysheva, Izv. Akad. Nauk SSSR, Neorg. Mater., 15 [1], (1979), pp. 173-174.](/docs-images/82/85477003/images/40-0.jpg "Fe 2 O 3 - K 2 O - SiO 2 - O 2 850 o C, p(o 2 ) = 0.21 atm SiO 2 K 2Si 2O 5(s3) 0.6 0.7 0.8 KFS6 KFS4 0.1 0.2 0.3 0.4 K 2SiO 3 0.1 0.2 0.3 0.4 0.5 KFS2 K2F2S3 KFeO2_HT 0.5 0.6 0.7 0.8 0.8 0.7 0.6 0.5 0.4 0.3 0.2 Fe 0.")
40 Isothermal section at 850 o C in Fe 2 O 3 -K 2 O-SiO 2 in air A.P. Protsyuk, G.A. Konechnyi, L.G. Latysheva, Izv. Akad. Nauk SSSR, Neorg. Mater., 15 [1], (1979), pp Fe 2 O 3 - K 2 O - SiO 2 - O o C, p(o 2 ) = 0.21 atm SiO 2 K 2Si 2O 5(s3) KFS6 KFS K 2SiO KFS2 K2F2S3 KFeO2_HT Fe 0.1 K 2 O 12K 2O 19 Fe 2 O 3 mole fraction
41 Liquidus surface in FeO-Na 2 O-SiO 2 in equilibrium with Fe P. T. Carter and M. Ibrahim, J. Soc. Glass Technol., 36 [170] (1952). FeO - Na 2 O - SiO 2 - Fe Projection (), Fe/(FeO+Na 2 O+SiO 2 ) (g/g) = FeO FeO - Na 2 O - SiO 2 - Fe 580 o C, Fe/(FeO+Na 2 O+SiO 2 ) (g/g) = NaFeO2_LT FeO FeNa 2O 2 FeNa 4O 3 FeSiNa 2O 4 FeNaO 2-HT FeNaO 2-LT FeNaO 2(s) FeNa 4O 3 Na 2O(s) SiNa 4O Na2O(s2) Fe 2SiO 4 Na 2O(s3) FeNa2O2 Si 2Na6O7 HALITE FeSiNa 2O 4 SiNa 2O Si 0.3 8Na 6O Na 2 O SiO 2 Fe 2O4Si Si 2Na 2O 5(s2) Quartz Si 2Na 2O 5(s) Si 2Na 2O 5(s3) mass fractions /(FeO+Na 2 O+SiO 2 ) Cristobalite SiNa4O SiNa2O Si 2Na 2O Na 2 O SiO 2 mass fractions /(FeO+Na 2 O+SiO 2 )
42 Isopletal section in Fe 2 SiO 4 -Na 2 SiO 3 in equilibrium with Fe P. T. Carter and M. Ibrahim, J. Soc. Glass Technol., 36 [170] (1952) Fe 2 SiO 4 - Na 2 SiO 3 - Fe Fe/(Fe 2 SiO 4 +Na 2 SiO 3 ) (g/g) = FCC_A1 + + Fe 2O 4Si 1100 FCC_A HALITE + FCC_A1 + + Fe 2SiO 4 (C) T( 900 HALITE + FCC_A1 + HALITE + BCC_A2 + + Fe 2SiO 4 HALITE + BCC_A2 + FCC_A1 + + SiNa 2O BCC_A2 + + FeSiNa 2O 4 BCC_A2 + + SiNa 2O 3 + FeSiNa 2O BCC_A2 + + Fe 2SiO 4 + FeSiNa 2O BCC_A2 + SiNa 2O 3 + Si 2Na 2O 5 + FeSiNa 2O 4 BCC_A2 + Si 2Na 2O 5 + Fe 2SiO 4 + FeSiNa 2O Na 2SiO 3/(Fe 2SiO 4+Na 2SiO 3) (g/g)
43 Isopletal section in Fe 2 SiO 4 -Na 4 SiO 4 in equilibrium with Fe P. T. Carter and M. Ibrahim, J. Soc. Glass Technol., 36 [170] (1952) Fe 2 SiO 4 - Na 4 SiO 4 - Fe Fe/(Fe 2 SiO 4 +Na 4 SiO 4 ) (g/g) = FCC_A1 + FCC_A1 + + Fe 2SiO HALITE + FCC_A HALITE + FCC_A1 + + Fe 2SiO 4 T(C C) 900 HALITE+BCC+ FCC_A1 + + FeSiNa 2O 4 FCC_A1 + + SiNa4O 4 BCC_A2 + HALITE + BCC_A2 + + Fe 2SiO 4 BCC + + FeSiNa 2O 4 BCC_A2 + + SiNa 4O 4 HALITE+BCC++FeSiNa 2O BCC_A2 + SiNa 4O 4 + Si 2Na 6O 7 + FeSiNa 2O BCC_A2 + + Fe 2SiO 4 + FeSiNa 2O 4 BCC_A2 + SiNa 2O 3 + SiNa 4O 4 + FeSiNa 2O BCC_A2 + Si 2Na 2O 5 + Fe 2SiO 4 + FeSiNa 2O Na 4 SiO 4 /(Fe 2 SiO 4 +Na 4 SiO 4 ) (g/g)
44 Isopletal section in Fe 2 SiO 4 -Na 2 Si 2 O 5 in equilibrium with Fe P. T. Carter and M. Ibrahim, J. Soc. Glass Technol., 36 [170] (1952) Fe 2 SiO 4 - Na 2 Si 2 O 5 - Fe Fe/(Fe 2 SiO 4 +Na 2 Si 2 O 5 ) (g/g) = FCC_A FCC_A1 + + Fe 2O 4Si T(C) BCC_A2 + + Fe 2O 4Si BCC_A2 + BCC_A2 + + Si 2Na 2O 5(s3) 700 BCC_A2 + + Si 2Na 2O 5(s2) 600 BCC_A2 + SiO 2(s3) + Si 2Na 2O 5(s) + Fe 2O 4Si BCC_A2 + SiO 2(s2) + Si 2Na 2O 5(s) + Fe 2O 4Si Na 2Si 2O 5/(Fe 2SiO 4+Na 2Si 2O 5) (g/g)
45 Isopletal section in Halite-Na 2 SiO 3 in equilibrium with Fe P. T. Carter and M. Ibrahim, J. Soc. Glass Technol., 36 [170] (1952) FeO - Na 2 SiO 3 - Fe Fe/(FeO+Na 2 SiO 3 ) (g/g) = FCC_A HALITE + FCC_A1 + T(C) 1000 FCC_A1 + + SiNa 2O 3 HALITE + FCC_A1 + + FeSiNa 2O BCC_A2 + + SiNa 2O 3 + FeSiNa 2O 4 HALITE + BCC_A2 + + FeSiNa 2O BCC_A2 + SiNa 2O 3 + Si 2Na 6O 7 + FeSiNa 2O 4 HALITE + BCC_A2 + Fe 2SiO 4 + FeSiNa 2O 4 BCC_A2 + SiNa 2O 3 + SiNa 4O 4 + FeSiNa 2O Na 2 SiO 3 /(FeO+Na 2 SiO 3 ) (g/g)
46 Liquidus surface in Fe 2 O 3 -Na 2 O-SiO 2 in air N.L. Bowen, J.F. Schairer, H.W.V. Willems, Am. J. Sci., 220 (20), [20], (1930), pp SiO 2 - Fe 2 O 3 - Na 2 O - O 2 Projection (), p(o 2 ) = 0.21 atm SiO 2 Quartz Si8Na6O19 SiNa2O3 Si 2Na 6O 7 SiNa4O4 Na 2O(s2) Si 2Na 2O 5(s3) Fe2Si8Na Na 2O(s3) NaFeAlO2_LT Cristobalite Fe2Si4Na2O12 Na10O24 Fe8Si5Na12O28 NaFeAlO2_HT FeNaO2_delta Fe2O3 SPINEL Na 2 O Fe 2 O 3 mass fraction NaFeAlO2_HT
47 Liquidus surface in Fe 2 O 3 -Na 2 SiO 3 -SiO 2 in air N.L. Bowen, J.F. Schairer, H.W.V. Willems, Am. J. Sci., 220, [20], (1930), pp SiO 2 - Fe 2 O 3 - Na 2 SiO 3 - O 2 Projection (), p(o 2 ) = 0.21 atm SiO 2 Si 2Na 2O 5(s3) SiNa2O3(s) Si 8Na 6O 19 Quartz Fe2Si8Na10O24 Cristobalite Acmite #2 Fe 2O 3 SPINEL Fe 8Si 5Na 12O Na 2 SiO 3 Fe 2 O 3 mass fraction
48 Isothermal section at 825 o C in Fe 2 O 3 -Na 2 SiO 3 -SiO 2 in air N.L. Bowen, J.F. Schairer, H.W.V. Willems, Am. J. Sci., 220, [20], (1930), pp SiO 2 - Fe 2 O 3 - Na 2 SiO 3 - O o C, p(o 2 ) = 0.21 atm SiO SiO 2(s3) SiO2(s3) + Fe 2O3 + + Fe2Si4Na2O12 Si 2Na 2O 5(s3) Fe 2Si 4Na 2O Fe 2Si 8Na 10O SiNa 2O 3(s) + Fe 2O 3 + Fe 2Si 8Na 10O Na 2 SiO 3 Fe 2 O 3 mass fraction
49 Isothermal section at 700 o C in Fe 2 O 3 -Na 2 O-SiO 2 in air D. W. Collins and L. N. Mulay, J. Am. Ceram. Soc., 53 [2] (1970). Na 2 O - Fe 2 O 3 - SiO 2 - O o C, p(o 2 ) = 0.21 atm SiO 2 Si 8 Na 6 O 19 Si 2Na 2O 5(s2) SiNa 2 O 3 Fe 2Si 8Na 10O 24 SiNa 4O 4 Na 2O(s) + SiNa 4O 4 + FeNaO 2(s) Fe 2Si2 4Na4 2O2 12 Fe 8Si 5Na 12O 28 FeNaO2_delta NaFeAlO2_LT Na 2 O Fe 2 O 3 mass fraction
50 Isopletal section Acmite-Na 2 SiO 3 in air N.L. Bowen, J.F. Schairer, H.W.V. Willems, Am. J. Sci., 220, [20], (1930), pp Na 2 SiO 3 - Na 2 Fe 2 Si 4 O 12 - O 2 p(o 2 ) = 0.21 atm Fe2O3 T(C) + Fe2O3 + Fe2Si4Na2O SiNa2O3 + Fe2Si4Na2O SiNa2O3 + Fe2Si8Na10O24 Fe2Si8Na10O24 + Fe2Si4Na2O Na 2 Fe 2 Si 4 O 12 /(Na 2 SiO 3 +Na 2 Fe 2 Si 4 O 12 ) (g/g)
51 Isopletal section Acmite-Na 2 Si 2 O 5 in air N.L. Bowen, J.F. Schairer, H.W.V. Willems, Am. J. Sci., 220, [20], (1930), pp Na 2 Si 2 O 5 - Na 2 Fe 2 Si 4 O 12 - O 2 p(o 2 ) = 0.21 atm Fe2O Fe2Si4Na2O12 T(C) + Si 2Na 2O 5(s3) 800 Si2Na2O5(s3) + Fe2Si4Na2O Si2Na2O5(s2) + Fe2Si4Na2O12 Si2Na2O5(s) + Fe2Si4Na2O Na 2 Fe 2 Si 4 O 12 /(Na 2 Si 2 O 5 +Na 2 Fe 2 Si 4 O 12 ) (g/g)
52 Isopletal section Fe 2 O 3 -Na 2 Si 2 O 5 in air N.L. Bowen, J.F. Schairer, H.W.V. Willems, Am. J. Sci., 220, [20], (1930), pp Na 2 Si 2 O 5 - Fe 2 O 3 - O 2 p(o 2 ) = 0.21 atm T(C) Fe 2O Si 2Na 2O 5(s3) + Fe 2Si 8Na 10O 24 + Fe 2Si 4Na 2O 12 + Fe 2O 3 + Fe 2Si 4Na 2O 12 Fe 2O 3 + Fe 2Si 4Na 2O 12 + Fe 2Si 8Na 10O 24 Si 2Na 2O 5(s3) + Fe 2Si 4Na 2O 12 + Fe 2Si 8Na 10O Fe 2O 3/(Na 2Si 2O 5+Fe 2O 3) (g/g)
53 S la g + F e 2 S i 8 N a 1 0 O 2 4 S la g + F e 2 O 3 F e 2 S i 8 N a 1 0 O F e 2 O 3 Isopletal sections with 5Na 2 O. Fe 2 O 3. 8SiO 2 N.L. Bowen, J.F. Schairer, H.W.V. Willems, Am. J. Sci., 220, [20], (1930), pp F e 2 O 3 - N a 1 0 F e 2 S i 8 O O 2 p ( O 2 ) = a t m S la g T(C) F e 2 O 3 / ( F e 2 O 3 + N a 1 0 F e 2 S i 8 O 2 4 ) ( g / g ) N.L. Bowen, J.F. Schairer, H.W.V. Willems, Am. J. Sci., 220, [20], (1930), pp N a 2 S i 2 O 5 - N a 1 0 F e 2 S i 8 O O 2 p (O 2 ) = a tm S la g T(C) S la g + S i 2 N a 2O 5(s 3 ) S la g + F e 2S i 8N a 1 0O S i 2N a 2O 5(s 3 ) + F e 2S i 8N a 1 0O N a 1 0Fe 2S i 8O 2 4/(N a 2S i 2O 5+ N a 1 0Fe 2S i 8O 2 4) ( g /g )
54 Isopletal section FeNaO 2 -SiO 2 in air I. E. Grey and C. Li, J. Solid State Chem., 69 [1] (1987). NaFeO 2 - SiO 2 - O 2 p(o 2 ) = 0.21 atm FeNaO2_delta 1100 T(C) 1000 NaFeO2_HT FeNaO2_delta 900 NaFeO2_LT 800 NaFeO2_LT + FeNaO 2(s) SiO 2 /(NaFeO 2 +SiO 2 ) (mol/mol)
55 Liquidus surface in MgO-Na 2 O-SiO 2 J. F. Schairer, J. Am. Ceram. Soc., 40 [7] (1957). Na 2 O - MgO - SiO 2 Projection () SiO 2 SiMgO3 SiMg 2O #2 Cristobalite NM5S12 HALITE NMS4 NM2S6 Quartz Si 8Na 6O 19 Si3Mg 2Na4O10 Si 2Na 2O 5 SiNa2O3 SiMgNa 2O 4 Si 2Na 6O 7 SiNa4O4 Na 2 O(s2) Na2O(s3) MgO mass fraction Na 2 O
56 Predicted isothermal sections in MgO-Na 2 O-SiO 2 Na 2 O - SiO 2 - MgO 600 o C SiO Mg 5Na 2Si 12O 30 MgNa 2Si 4O 10 Na 2Mg 2Si 6O Si 2Na 2O 15 5 MgSiO 3(s2) SiNa 2O 3 Si 3Mg 2Na 4O 10 Mg 2SiO 4 SiNa 4O 4 SiMgNa 2O 4 HALITE + Na 2O(s) + SiNa 4O 4(s) Si 12Mg 5Na 2O 30 Na 2 O - SiO 2 - MgO 800 o C SiO 2 Si 4MgNa 2O Si 2Na 2O 5(s3) Na 2 O - SiO 2 - MgO 1200 o C SiO 2 MgO mole fraction MgO Na 2 O MgSiO 3(s3) Si 6Mg 2Na 2O 15 SiNa 2O 3 Si 3Mg 2Na 4O 10 Si 2Na 6O Mg 2SiO 4 SiNa 4O 4 SiMgNa 2O 4 HALITE + Na 2O(s2) + SiNa 4O mole fraction SiMg 2 O 4 Na 2 O SiMgO 3(s4) Si 3Mg 2Na 4O 10 SiMgNa 2 O 4 HALITE MgO mole fraction Na 2 O
57 Proposed isothermal sections in Al 2 O 3 -CaO CaO-K 2 O-Na 2 O KAlO 2 - NaAlO 2 - CaAl 2 O o C KAlO 2 AlNaO 2 - AlKO 2 - CaAl 2 O o C AlKO 2 KAlO 2 - NaAlO 2 - CaAl 2 O o C (K,Na)AlO2_HT + (K,N)2C3A5 KAlO 2 (K,N)2C3A5 + CaAl2O (K,Na)AlO2_HT (K,N)2C3A (K,Na)AlO2_HT + (K,N)2C3A (K,N)2C3A5 + Ca 3Al16Na2O28 + Ca8Al6Na2O18 (K,Na)AlO2_HT + (K,N)2C3A NaAlO 2 CaAl 2 O 4 mole fraction (K,N)2C3A5 (K,N)2C3A5 + CaAl2O4 + (K,N)2C3A5 (K,N)2C3A AlNaO 2 CaAl 2 O 4 mole fraction NaAlO 2 CaAl 2 O 4 mole fraction
58 Phase equilibria diagram of the system KFeSiO 4 -KAlSiO 4 R.S. Roth, Amer. Chem. Soc., [20], pp (1980) KFeSiO 4 - KAlSiO 4 - O 2 p(o 2 ) = 0.21 atm [R.S. Roth, 1980]: completely melted partial melting no melting Kaliophilite-H 1400 T(C) Kaliophilite-H Kaliophilite-L KAlSiO 4 /(KFeSiO 4 +KAlSiO 4 ) (mol/mol)
59 Phase equilibria diagram of the system KFeSiO 4 -KAlSiO 4 KAlO 2 - KFeO 2 - SiO 2 - O o C, p(o 2 ) = 0.21 atm R.S. Roth, Amer. Chem. Soc., [20], pp (1980). SiO 2 + Feldspar Leucite + Feldspar Leucite + Kaliophilite-H Cristobalite KAF4S3 + Kaliophilite-H K(Fe,Al)O2_HT + KAF4S3 K(Fe,Al)O2_HT KAlO 2 KFeO 2 mole fraction
60 Conclusions The database for the Al 2 O 3 -CaO-FeO-Fe 2 O 3 -K 2 O-Na 2 O-MgO-SiO 2 system was created combining the following databases: Al 2 O 3 -CaO-FeO-Fe 2 O 3 -MgO-SiO 2 () and Al 2 O 3 -Na 2 O-K 2 O-SiO 2 (FZ Jülich) The 3 binary systems, 11 ternary and 4 quaternary subsystems were assessed using available experimental information. The liquid phase in all subsystems was evaluated using associate species model (two cations per species). In order to get a compatibility the solubility ranges for iron were introduced into existing thermodynamic description for three solid solution phases. The solubility ranges of nine new solid solution phases were described using sublattice model. The missing Gibbs functions for these phases were estimated using appropriate reciprocal equations. The 29 stoichiometric phases were incorporated. All phase diagrams incorporated in New New Atlas
61 Future developments Expansion of the entire database by addition of such oxides as MnO and NiO as well as CrO x and P 2 O 5. Addition of PbO, ZnO and V x O y in co-operative projects. Addition of non-oxidic components such as CaS, FeS and Addition of non-oxidic components such as CaS, FeS and MnS is in planning.
62 Thanks for your attention!
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