Reinvestigation of the Phase Equilibria in the La2O3-P2O5 System

被引：7
|
作者：
Hatada, Naoyuki [1 ,2 ]
Nagai, Takashi [3 ,4 ]
Nose, Yoshitaro [1 ]
Uda, Tetsuya [1 ]
机构：
[1] Kyoto Univ, Dept Mat Sci & Engn, Sakyo Ku, Kyoto 6068501, Japan
[2] Kyushu Univ, INAMORI Frontier Res Ctr, Environm Technol Res Div, Nishi Ku, Fukuoka 8190395, Japan
[3] Univ Tokyo, Inst Ind Sci, Meguro Ku, Tokyo 1538505, Japan
[4] Chiba Inst Technol, Fac Engn, Dept Mech Sci & Engn, Narashino, Chiba 2750016, Japan
来源：
JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION | 2013年 / 34卷 / 03期
关键词：
lanthanum phosphate; phase diagram; solid state reaction; RARE-EARTH PHOSPHATES; CONDUCTION; LA2O3-NA2O-P2O5; STABILITY; COATINGS; MONAZITE; GROWTH; LAPO4;
D O I：
10.1007/s11669-013-0224-3
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The phase equilibria between the solid phases in the La2O3-P2O5 system were reinvestigated with solid state reaction method. The existence of La3PO7, La7P3O18, LaPO4, and LaP3O9 was confirmed. La7P3O18 can form only at similar to 1200 A degrees C or higher possibly due to kinetic reasons, but it is stable at lower temperatures. On the other hand, three intermediate compounds proposed to exist, La5PO10, La-4(P2O7)(3), and La2P4O13 were not obtained in this study. Based on the literature, La-4(P2O7)(3) and La2P4O13 are considered to be metastable phases, although thermodynamic evidence is still required.
引用
收藏
页码：196 / 201
页数：6
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