HIGH-QUARTZ SOLID-SOLUTION PHASES FROM XEROGELS WITH COMPOSITION 2MGO.2AL2O3.5SIO2 (MU-CORDIERITE) AND LI2O.AL2O3.NSIO2(N=2 TO 4)(BETA-EUCRYPTITE) - CHARACTERIZATION BY XRD, FTIR AND SURFACE MEASUREMENTS

被引：47

作者：

MAZZA, D ^{[1
]}

LUCCOBORLERA, M ^{[1
]}

BUSCA, G ^{[1
]}

DELMASTRO, A ^{[1
]}

机构：

[1] UNIV GENOA, FAC INGN, IST CHIM, I-16126 GENOA, ITALY

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 1993年 / 11卷 / 04期

关键词：

D O I：

10.1016/0955-2219(93)90029-Q

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The title phases are prepared by the sol-gel route employing prehydrolyzed tetraethylorthosilicate (TEOS) and Al, Li or Mg nitrates in aqueous solution. Amorphous xerogels are obtained at 400-degrees-C; they are characterized as high to very high surface oxides with peculiar pore-size distributions. High-quartz solid-solution phases originate from these xerogels by heating at 600-degrees-C (lithia-containing compositions) or at 900-degrees-C (magnesia-containing composition). They are characterized by X-ray powder diffraction and FTIR spectroscopy as phases with strong disorder in the cation distribution, both in the AlSi sites and Li sites, with the exception of the stoichiometry LiAlSiO4, which shows a certain degree of Li and Si/Al ordering.

引用

页码：299 / 308

页数：10

共 38 条

[1] EFFECT OF PHOSPHATE IONS ON THE SURFACE-CHEMISTRY AND MICROSTRUCTURE OF AMORPHOUS ALUMINA [J].