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

共 50 条

[1] Reinvestigation of the Phase Equilibria in the La2O3-P2O5 System
Naoyuki Hatada
Takashi Nagai
Yoshitaro Nose
Tetsuya Uda
Journal of Phase Equilibria and Diffusion, 2013, 34 : 196 - 201
[2] Phase equilibria in the system La2O3-K2O-P2O5
Jungowska, W
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2000, 60 (01) : 193 - 197
[3] First-principles thermodynamics of La2O3-P2O5 pseudobinary system
Toyoura, Kazuaki
Hatada, Naoyuki
Nose, Yoshitaro
Uda, Tetsuya
Tanaka, Isao
PHYSICAL REVIEW B, 2011, 84 (18)
[4] Phase Equilibria in The System La2O3–K2O–P2O5
W. Jungowska
Journal of Thermal Analysis and Calorimetry, 2000, 60 : 193 - 197
[5] Phase equilibria in a portion of the system La2O3-BaO-P2O5 rich in P2O5
Znamierowska, T
Radominska, E
POLISH JOURNAL OF CHEMISTRY, 1999, 73 (04) : 593 - 597
[6] Investigation of phase equilibria in SrO-La2O3-P2O5 system and thermo physical properties of established compounds
Keskar, Meera
Patkare, Geeta
Shafeeq, Muhammed
Phatak, R. A.
Kannan, S.
JOURNAL OF SOLID STATE CHEMISTRY, 2022, 308
[7] Phase equilibria in the Ce2O3-K2O-P2O5 system
Irena Szczygieł
Aleksandra Matraszek
Teresa Znamierowska
Journal of Thermal Analysis and Calorimetry, 2008, 93 : 671 - 676
[8] Phase equilibria in the Ce2O3-K2O-P2O5 system
Szczygiel, Irena
Matraszek, Aleksandra
Znamierowska, Teresa
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2008, 93 (03) : 671 - 676
[9] Phase equilibria in the oxide system Nd2O3-K2O-P2O5
Szczygiel, Irena
Znamierowska, Teresa
Mizer, Dagmara
SOLID STATE SCIENCES, 2010, 12 (07) : 1205 - 1210
[10] Phase equilibria in the La2O3-Y2O3-Nd2O3 system at 1500 °C
Chudinovych, O., V
Andrievskaya, O. R.
Bogatyryova, J. D.
Kovylyaev, V. V.
Bykov, O., I
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2021, 41 (13) : 6606 - 6616

← 1 2 3 4 5 →