THERMAL EVOLUTION OF (ZR,TI)O2 GELS SYNTHESIZED AT DIFFERENT BASIC PH

被引：5

作者：

NAVIO, JA ^{[1
]}

MARCHENA, FJ ^{[1
]}

MACIAS, M ^{[1
]}

SANCHEZSOTO, PJ ^{[1
]}

PICHAT, P ^{[1
]}

机构：

[1] ECOLE CENT LYON,CNRS,URA 1385,F-69131 LYON,FRANCE

来源：

JOURNAL OF THERMAL ANALYSIS | 1993年 / 40卷 / 03期

关键词：

DTA; SOL-GEL METHOD;

D O I：

10.1007/BF02546869

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

(Zr,Ti)02 gels as precursors of zirconium titanate (ZT) powders were prepared by the sol-gel method, which involves hydrolysis of ZrClO2 + TiCl4 in the presence or absence of hydrogen peroxide, in two pH ranges, 8-9 or 11-12. Thermal evolution of these precursors has been studied by DTA, BET surface area, XRD and SEM. Differences in DTA curves, surface area and morphology were observed. In particular, ZT prepared at pH = 8-9 with hydrogen peroxide was purer, more homogeneous and presented a different morphology compared to ZT processed at pH = 11-12; hydrated/hydroxylated Zr-Ti species were formed to a greater extent in the latter case. Addition of hydrogen peroxide during chemical processing of these gels plays a key role in controlling the crystallization temperature of ZT.

引用

页码：1095 / 1102

页数：8

共 14 条

[1]

BRINKER CF, 1988, MATERIALS RES S PITT, V121

[2]

Clark R.J.H., 1975, CHEM TITANIUM ZIRCON

[3]

Hahn H, 1988, CERAMIC T B, V1, P1115

[4] MIXED-PHASE PIGMENTS WITH ZRTIO4 [J].