Influence of galia (Ga2O3) addition on the phase transformations and crystal growth behavior of zirconia (ZrO2)

被引：9

作者：

Barad, Chen ^{[1
,2
]}

Kimmel, Giora ^{[3
]}

Hayun, Hagay ^{[4
]}

Shamir, Dror ^{[5
]}

Shandalov, Michael ^{[5
]}

Shekel, Gal ^{[5
]}

Gelbstein, Yaniv ^{[1
,4
]}

机构：

[1] Ben Gurion Univ Negev, Unit Energy Engn, IL-84105 Beer Sheva, Israel

[2] IAEC, POB 7061, IL-61070 Tel Aviv, Israel

[3] Ben Gurion Univ Negev, Inst Appl Res, IL-84105 Beer Sheva, Israel

[4] Ben Gurion Univ Negev, Dept Mat Engn, IL-84105 Beer Sheva, Israel

[5] NRCN, POB 9001, IL-84190 Beer Sheva, Israel

来源：

JOURNAL OF MATERIALS SCIENCE | 2018年 / 53卷 / 18期

关键词：

SINTERING BEHAVIOR; GALLIA ADDITION; CERAMICS; KINETICS; ALUMINA;

D O I：

10.1007/s10853-018-2556-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of a galia (Ga2O3) addition on the crystallographic phase evolution and the crystal growth behavior of zirconia (ZrO2) rich powder were investigated. Binary compositions of galia-zirconia powder (on the zirconia-rich side of the quasi-binary phase diagram) were obtained by the sol-gel method and calcined at different temperatures for 2 h. Rietveld refinement (FullProf program) was used to determine the crystallographic phase composition. Crystal size was approximated based on X-ray diffractions analysis combined with estimates of average crystal size obtained by processing high-resolution scanning electron microscopy images. The surface area of the powders obtained was measured via the Brunauer-Emmett-Teller method. Zirconia-galia sol-gel powders were found to form tetragonal or mixed tetragonal-monoclinic solid solution phases depending on both composition and calcination temperature. It was shown that galia suppressed crystal growth process in zirconia, producing finer nano-powders with higher surface area compared to pure zirconia.

引用

页码：12741 / 12749

页数：9

共 23 条

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