Physicochemical Properties of Nanosized Powders of the LaPO4-DyPO4-H2O System

被引：2

作者：

Mezentseva, L. P. ^{[1
]}

Osipov, A. V. ^{[1
]}

Ugolkov, V. L. ^{[1
]}

Popova, V. F. ^{[1
]}

Maslennikova, T. P. ^{[1
]}

Kuchaeva, S. K. ^{[1
]}

Yakovlev, A. V. ^{[1
]}

机构：

[1] Russian Acad Sci, Grebenshchikov Inst Silicate Chem, St Petersburg 199034, Russia

来源：

GLASS PHYSICS AND CHEMISTRY | 2018年 / 44卷 / 05期

关键词：

sol-gel synthesis; nanopowders of lanthanum-dysprosium orthophosphates; physicochemical analysis; specific surface area; NANOPOWDERS; DY;

D O I：

10.1134/S1087659618050139

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：

Nanosized La1-xDyxPO4 center dot nH(2)O powders are synthesized by the sol-gel method using direct and reverse precipitation. The formation of a continuous series of hexagonal solid solutions based on LaPO4 center dot nH(2)O is confirmed by the XRD and DSC/TG methods. A continuous series of monoclinic solid solutions based on LaPO4 is formed at temperatures higher than 600 degrees C. A reflex corresponding to a tetragonal form of DyPO4 is formed during the calcination of DyPO4 powder at 850 degrees C. Two types of solid solutions are observed at temperatures of 1000-1200 degrees C, namely, monoclinic solutions based on LaPO4 (to x approximate to 0.7) and tetragonal solutions based on DyPO4 (0.90 <= x <= 1.0). The results are compared depending on the methods of nanopowder synthesis.

引用

页码：423 / 427

页数：5

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