Stabilization of ZrO2 Concentrate by Rare Earth Elements (La, Nd, Pr, Ce)

被引：3
|
作者：
Kul'met'eva, V. B. [1 ]
Porozova, S. E. [1 ]
Gilev, V. G. [1 ]
Vokhmyanin, D. S. [1 ]
机构：
[1] FGBOU VO Perm Natl Res Polytech Univ, Perm, Russia
来源：
REFRACTORIES AND INDUSTRIAL CERAMICS | 2019年 / 59卷 / 06期
关键词：
zirconium dioxide; of rare-earth elements (REE) concentrate; Raman spectra; lanthanum zirconate;
D O I：
10.1007/s11148-019-00280-7
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effect of annealing and sintering temperature on phase transformation of ZrO2 is studied in relation to REE concentrate content using differential thermal analysis, Raman spectroscopy and x-ray diffraction. It is shown that introduction of REE concentrate in an amount of more than 15 wt.% stabilizes ZrO2 tetragonal phase solely at below 1200 degrees C. A further increase in temperature leads to destabilization of the tetragonal phase with formation of the monoclinic and cubic phases of the Ln(2)Zr(2)O(7) type isostructural compounds (n = La, Nd, ...) with a pyrochlore structure.
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页码：599 / 605
页数：7
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