Influence of galia (Ga2O3) addition on the phase evolution and grain growth behavior of voided yttria stabilized zirconia (YSZ) powder

被引:4
作者
Barad, Chen [1 ,2 ]
Shamir, Dror [3 ]
Cahana, Meital [3 ]
Shandalov, Michael [3 ]
Hayun, Hagay [4 ]
Gelbstein, Yaniv [1 ,4 ]
机构
[1] Ben Gurion Univ Negev, Unit Energy Engn, IL-84105S Beer Sheva, Israel
[2] IAEC, POB 7061, IL-61070 Tel Aviv, Israel
[3] NRCN, POB 9001, IL-84190 Beer Sheva, Israel
[4] Ben Gurion Univ Negev, Dept Mat Engn, IL-84105 Beer Sheva, Israel
关键词
Ceramics; Sol-gel processes; Phase transitions; X-ray diffraction; Scanning electron microscopy; SEM; THERMAL BARRIER COATINGS; OXIDE THIN-FILMS; SINTERING BEHAVIOR; GALLIA ADDITION; CRYSTAL-GROWTH; CONDUCTIVITY;
D O I
10.1016/j.jallcom.2018.12.318
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 effect of a galia (Ga2O3) addition on the crystallographic phase transformations and the grain growth behavior of yttria stabilized zirconia (YSZ) were investigated regarding powders containing different amounts of galia in the range of 0-25 mol %. Ternary compositions of galia-YSZ sponge-like cryogels were prepared by the sol-gel method combining freeze-drying process and calcination of dried powders at different temperatures for 2 h in air. Crystallographic phase transitions were analyzed via X-ray diffraction (XRD) and exceptional powder particle morphology of internal nano voids derived from the freeze-drying technique was investigated by using Scanning Transmission Electron Microscope (STEM). It was shown that galia supressed the grain growth process in yttria stabilized zirconia and had no effect on the internal voids obtained. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码:286 / 291
页数:6
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