Study of magnesium aluminate spinel formation from carbonate precursors

被引：31

作者：

Wajler, Anna ^{[1
]}

Tomaszewski, Henryk ^{[1
]}

Drozdz-Ciesla, Ewa ^{[2
]}

Weglarz, Helena ^{[1
]}

Kaszkur, Zbigniew ^{[3
]}

机构：

[1] Inst Elect Mat Technol, Dept Ceram & Seals, PL-01919 Warsaw, Poland

[2] AGH Univ Sci & Technol, Dept Mat Sci & Ceram, PL-30059 Krakow, Poland

[3] Polish Acad Sci, Inst Phys Chem, PL-01224 Warsaw, Poland

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2008年 / 28卷 / 13期

关键词：

spinels; powders-chemical preparation; calcination; MgAl2O4;

D O I：

10.1016/j.jeurceramsoc.2008.03.013

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 aim of the presented work was to study formation of magnesium aluminate spinel precursor powder during the co-precipitation of magnesium and aluminium nitrate with ammonium carbonate and its thermal transformation to spinel powder. After precipitation, the only crystalline phase is NH4Al(OH),CO3 center dot H2O (ammonium dawsonite). The second one, Mg6Al2(CO3)(OH)(16)center dot 4H(2)O (hydrotalcite) appears during ageing. As found by DTA-MS and HT-XRD measurements, co-existence of both phases in very close contact results in their easier decomposition. On the base of the results obtained the scheme of phase transformations of co-precipitated precursor leading to formation of MgAl2O4 is proposed. (c) 2008 Elsevier Ltd. All rights reserved.

引用

页码：2495 / 2500

页数：6

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