PREPARATION OF PEROVSKITE-TYPE OXIDE, LACRO3, BY THERMAL-DECOMPOSITION OF LA [CR(CH2(COO)2)3].6H2O

被引：0

作者：

NAKAYAMA, S ^{[1
]}

SAKAMOTO, M ^{[1
]}

机构：

[1] EHIME UNIV,FAC ENGN,DEPT APPL CHEM,BUNKYO KU,MATSUYAMA,EHIME 790,JAPAN

来源：

NIPPON SERAMIKKUSU KYOKAI GAKUJUTSU RONBUNSHI-JOURNAL OF THE CERAMIC SOCIETY OF JAPAN | 1992年 / 100卷 / 03期

关键词：

LANTHANUM (III) TRIS (MALONATO) CHROMATE (III); THERMAL DECOMPOSITION; PEROVSKITE-TYPE OXIDE; SPECIFIC SURFACE AREA; PARTICLE SIZE;

D O I：

暂无

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 thermal decomposition of Lanthanum (III) tris (malonato) chromate (III) hexahydrate (La[Cr(CH2 (COO)2)3].6H2O) was studied from room temperature to 1000-degrees-C in order to investigate the formation process of perovskite-type oxides. The starting material and the decomposition products in plateau ranges of 150-degrees-250-degrees-C, 400-degrees-470-degrees-C, 560-degrees-680-degrees-C and 720-degrees-C approximately were characterized by IR and X-ray diffraction analyses. The complex compound released almost all water molecules at about 200-degrees-C. Then, the anhydrated complex began to decompose at about 250-degrees-C, and the mixed oxide (LaCrO4) and perovskite-type oxide (LaCrO3) formed between 560-degrees and 680-degrees-C and above 720-degrees-C, respectively. The specific surface area and particle size of the oxide (LaCrO3) calcined at 750-degrees-C were 2.4 m2.g-1 and 0.2-0.5-mu-m, respectively.

引用

页码：342 / 345

页数：4

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