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

页码：196 / 201

页数：6

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