Phase stability study of the pseudobinary system Gd2O3-Nd2O3 (T≤1350°C)

被引：25

作者：

Costa, G. A. ^{[1
,2
]}

Artini, C. ^{[1
,2
]}

Ubaldini, A. ^{[3
]}

Carnasciali, M. M. ^{[1
,4
]}

Mele, P. ^{[5
]}

Masini, R. ^{[6
]}

机构：

[1] DCCI, I-16146 Genoa, Italy

[2] CNR, INFM, LAMIA, I-16146 Genoa, Italy

[3] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan

[4] INSTM, I-16146 Genoa, Italy

[5] Kyushu Inst Technol, Dept Mat Sci, Kitakyushu, Fukuoka 8048550, Japan

[6] IMEM, CNR, I-16146 Genoa, Italy

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2008年 / 92卷 / 01期

关键词：

phase stability; rare earth sesquioxides; X-ray diffraction;

D O I：

10.1007/s10973-007-8744-x

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The phase stability of the system Gd2O3-Nd2O3 up to 1350 degrees C was studied. Mixed oxides were synthesized by coprecipitation of mixed oxalates. Depending on the thermal treatment, three possible structures of the oxides, namely the A (hexagonal, P6(3)/mmm), B (monoclinic, C2/m) and C (cubic, Ia3) forms, were obtained. Below 1300 degrees C the system Gd2O3-Nd2O3 shows three monophasic (A, B and C phase) and three biphasic regions (A+B, B+C and A+C phase). Below 550 degrees C the C phase is stable over the whole composition range. A validation procedure for the existence of the C phase in pure Nd2O3 was also set up.

引用

页码：101 / 104

页数：4

共 29 条

[1] The binary rare earth oxides
Adachi, G
Imanaka, N
[J]. CHEMICAL REVIEWS, 1998, 98 (04) : 1479 - 1514
[2] Crystal field strength in C-type cubic rare earth oxides
Antic-Fidancev, E
Hölsä, J
Lastusaari, M
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2002, 341 (1-2) : 82 - 86
[3] The lattice constants of the C-forming oxides of rare earth metals
Bommer, H
[J]. ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 1939, 241 (2/3): : 273 - 280
[4] Boulesteix C., 1982, HDB PHYS CHEM RARE E, V5, P321
[5] PREPARATION OF C-TYPE STRUCTURE OF LA2O3
BRAUER, G
MOHRROSE.E
[J]. ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 1972, 394 (03): : 301 - &
[6] COUTURES JP, 1975, REV INT HAUTES TEMP, V12, P181
[7] Oxidative coupling of methane catalyzed unexpected synergistic effect of the by rare earth oxides oxide mixtures
Dedov, AG
Loktev, AS
Moiseev, II
Aboukais, A
Lamonier, JF
Filimonov, IN
[J]. APPLIED CATALYSIS A-GENERAL, 2003, 245 (02) : 209 - 220
[8] Eyring L., 1979, Handbook on the Physics and Chemistry of Rare-earths, Vol.3. Non-metallic Compounds 1, P337, DOI 10.1016/S0168-1273(79)03010-5
[9] Eyring L, 1979, HDB PHYS CHEM RARE E, V3, P401
[10] On polymorphism and morphotropism of rare earth sesquioxides
Fedorov, PP
Nazarkin, MV
Zakalyukin, RM
[J]. CRYSTALLOGRAPHY REPORTS, 2002, 47 (02) : 281 - 286

← 1 2 3 →