Synthesis, characterization and sintering of fluorite and pyrochlore-type compounds: Pr2Zr2O7, Sm2Zr2O7 and PrSmZr2O7

被引：9

作者：

Matovic, Branko ^{[1
]}

Maletaskic, Jelena ^{[1
,2
]}

Yoshida, Katsumi ^{[2
]}

Yano, Toyohiko ^{[2
]}

机构：

[1] Univ Belgrade, Inst Nucl Sci Vinca, Ctr Excellence CextremeLab Vinca, Mike Petrovica Alasa 12-14, Belgrade 11000, Serbia

[2] Tokyo Inst Technol, Inst Innovat Res, Lab Adv Nucl Energy, Meguro Ku, 2-12-1 Ookayama, Tokyo 1528550, Japan

来源：

MATERIALS TODAY-PROCEEDINGS | 2019年 / 16卷

关键词：

Pyrochlore; Synthesis; Microstructure; Sintering; ELECTRICAL-CONDUCTIVITY; PHASE; LA2ZR2O7; GD;

D O I：

10.1016/j.matpr.2019.05.283

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Fluorite and pyrochlore-type compounds (Pr2Zr2O7, Sm2Zr2O7 and PrSmZr2O7) powders were prepared by glycine nitrate process (GNP) starting from metal (Sm, Pr) nitrate, zirconium chloride and glycine as a fuel. The GNP process at room temperature initially yielded amorphous powders, which crystallized after subsequent calcination to form crystalline ceramics. The formation of well crystalline compounds took place at temperature as low as 950 degrees C. The phase evolution with thermal treatment as well as powder properties such as crystallite size, lattice strain and lattice parameter were studied by X-ray powder diffraction (XRPD) at room temperature. High-density ceramic pellets free of any additives were obtained after compaction of the obtained powders and subsequent sintering at 1600 degrees C for 4 h in air. Sintering behaviour of the synthesized pyrochlore phases was followed with a scanning electron microscope. Hardness of the sintered samples was found to be in range of 8.9 to 9.9 GPa depending of chemical composition. (C) 2019 Published by Elsevier Ltd.

引用

页码：156 / 162

页数：7

共 50 条

[1] Effect of MgO on the Electrical Conductivity of the Pyrochlore-Type Sm2Zr2O7
Xia, Xiao-Liang
Ouyang, Jia-Hu
Liu, Zhan-Guo
Li, Sa
[J]. SCIENCE OF ADVANCED MATERIALS, 2010, 2 (04) : 497 - 502
[2] MECHANISM OF FORMATION OF SM2ZR2O7 AND GD2ZR2O7 COMPOUNDS WITH PYROCHLORE STRUCTURE
FOMINA, LN
PALGUEV, SF
[J]. ZHURNAL NEORGANICHESKOI KHIMII, 1977, 22 (02): : 326 - 330
[3] Influence of CaO on structure and electrical conductivity of pyrochlore-type Sm2Zr2O7
Xia, Xiao-Liang
Ouyang, Jia-Hu
Liu, Zhan-Guo
[J]. JOURNAL OF POWER SOURCES, 2009, 189 (02) : 888 - 893
[4] Nanoscopic characterization of Pr2Zr2O7 at Zr sites
Martínez, JA
Caracoche, MC
Rivas, PC
Rodríguez, AM
Bondioli, F
Manfredini, T
Ferrari, AM
[J]. PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 2005, 242 (09): : 1838 - 1841
[5] Spin Freezing in the Pyrochlore Antiferromagnet Pr2Zr2O7
Matsuhira, K.
Sekine, C.
Paulsen, C.
Wakeshima, M.
Hinatsu, Y.
Kitazawa, T.
Kiuchi, Y.
Hiroi, Z.
Takagi, S.
[J]. HIGHLY FRUSTRATED MAGNETISM 2008 (HFM 2008), 2009, 145
[6] Hydrothermal synthesis and photocatalytic properties of pyrochlore Sm2Zr2O7 nanoparticles
Wang, Qi
Cheng, Xingwang
Li, Jingbo
Jin, Haibo
[J]. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2016, 321 : 48 - 54
[7] SYNTHESIS OF PR2ZR2O7 ON BASIS OF CARBONATE COMPOUNDS OF ELEMENTS
DEINEKA, GF
TSELIK, IN
SYCHEV, MI
BUROVA, TI
ANDRIANOV, AM
FILATOV, LY
[J]. INORGANIC MATERIALS, 1976, 12 (11) : 1715 - 1717
[8] Influence of trivalent Gd and Dy codoping on the structure and electrical conductivity of pyrochlore-type Sm2Zr2O7
Xia, Xiao-Liang
Liu, Zhan-Guo
Ouyang, Jia-Hu
Zheng, Yi
[J]. JOURNAL OF POWER SOURCES, 2012, 217 : 316 - 321
[9] OXYGEN-ION CONDUCTION IN THE SM2ZR2O7 PYROCHLORE PHASE
SHINOZAKI, K
MIYAUCHI, M
KURODA, K
SAKURAI, O
MIZUTANI, N
KATO, M
[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1979, 62 (9-10) : 538 - 539
[10] Conductivity for Eu2Zr2O7 and La2Ce2O7 with pyrochlore-type composition
Yamamura, H
Nishino, H
Kakinuma, K
[J]. JOURNAL OF THE CERAMIC SOCIETY OF JAPAN, 2004, 112 (1310) : 553 - 558

← 1 2 3 4 5 →