Abstract
Sintering of sol–gel powders often leads to porous samples despite the high reactivity of such powders. The influence of heterogeneity coming firstly from the use of different reagents as gel formers (Si and Al alkoxides) or of a mixed nature (Si–Al ester) and secondly from the hydrolysis–polycondensation route (mixing in anhydrous condition or pre-hydrolysis of the reagents) was studied for a lithium aluminum silicate composition using differential thermal analysis, expansion-shrinkage measurements and X-ray diffraction. The effects of the synthesis conditions on the microstructures is discussed from optical microscopy, scanning electron microscopy and metallurgical observations.
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References
1. L. C. KLEIN (ed.), “Sol-gel technology for thin films, fibers, preforms, electronics and specialty stages”, (Noyes Publications, Parkridge, NJ, 1988).
PH. COLOMBAN and V. VENDANGE,J. Non-Cryst. Solids 146–147 (1992) 245.
PH. COLOMBAN,Ceram. Int. 15 (1989) 23.
Idem.,Adv. Ceram. 21 (1987) 139.
R. HATCH,Amer. Mineral. 28 (1993) 471.
H. SCHEIDLER and E. RODEK,Ceram. Bull. 68 (1989) 1926.
F. K. KO,ibid. 68 (1989) 401.
G. PARTRIDGE,Angew. Chem. Int. Engng. Adv. Mater. 328 (1989) 1746.
K. M. PREWO and J. J. BRENNAN,J. Mater. Sci. 17 (1982) 2371.
PH. COLOMBAN, M. MENET, E. MOUCHON, C. COURTEMANCHE and M. PARLIER, Fr. Patent 2672283, 4 February (1991); Eur. Patent 92400235.5; US Patent 07/830904.
V. VENDANGE and PH. COLOMBAN,J. Sol-Gel Sci. Technol. 2 (1994) 407.
M. PRASSAS and L. L. HENCH, in “Ultrastructure processing of ceramics and glasses”, edited by L. L. Hench and D. R. Ulrich (Wiley, New York, 1984) pp. 100–25.
J. C. POUXVIEL and J. P. BOILOT,J. Non-Cryst. Solids 103 (1988) 331.
B. YOLDAS,J. Mater. Sci. 14 (1979) 1843.
PH. COLOMBAN,ibid. 24 (1989) 3011.
C. T. LI,Z. Kristallogr. 127 (1968) 327.
PH. COLOMBAN and L. MAZEROLLES,J. Mater. Sci. Lett. 2 (1990) 1077.
Idem.,J. Mater. Sci. 26 (1991) 3503.
W. E. CAMERON,Amer. Ceram. Sci. Bull. 56 (1977) 1003.
T. BAN, S. HAYASHI, A. YASUMORI and K. OKADA,J. Eur. Ceram. Soc. 16 (1996) 127.
J. C. HULING and G. L. MESSING,J. Non-Cryst. Solids 147–148 (1992) 213.
R. X. FISCHER, H. SCHNEIDER and D. VOLL,J. Eur. Ceram. Soc. 16 (1996) 109.
C. T. LI and D. R. PREACOR,Z. Kristallogr. 126 (1968) 46.
P. T. CLARK and J. M. SPINK,ibid. 130 (1969) 420.
A. ZIADI, J. P. MERCURIO and B. FRIT,Mater. Res. Bull. 19 (1984) 1015.
J. Y. HSO and R. F. SPEYER,J. Amer. Ceram. Soc. 72 (1989) 2334.
S. KNICHERBOCHER, M. R. TUZZOLO and S. LAWHOME,J. Amer. Ceram. Soc. 72 (1989) 1873–79.
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BRUNETON, E., BIGARRE, J., MICHEL, D. et al. Heterogeneity, nucleation, shrinkage and bloating in sol–gel glass ceramics (the case of lithium aluminosilicate compositions). Journal of Materials Science 32, 3541–3548 (1997). https://doi.org/10.1023/A:1018605724508
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DOI: https://doi.org/10.1023/A:1018605724508