Influence of Lanthanum Concentration on Microstructure of (Ho1-xLax)2O3 Magneto-Optical Ceramics

被引：8

作者：

Balabanov, Stanislav ^{[1
]}

Demidova, Kristina ^{[2
]}

Filofeev, Sergey ^{[1
]}

Ivanov, Maxim ^{[1
,2
,3
]}

Kuznetsov, Dmitrii ^{[3
]}

Li, Jiang ^{[4
]}

Permin, Dmitry ^{[1
]}

Rostokina, Elena ^{[1
]}

机构：

[1] Russian Acad Sci, GG Devyatykh Inst Chem High Pur Subst, 49 Tropinin St, Nizhnii Novgorod, Russia

[2] Russian Acad Sci, Ural Branch, Inst Electrophys, 106 Amundsen St, Ekaterinburg 620016, Russia

[3] Ural Fed Univ, 19 Mira Ave, Ekaterinburg 620002, Russia

[4] Chinese Acad Sci, Shanghai Inst Ceram, 585 He Shuo Rd, Shanghai 201899, Peoples R China

来源：

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2020年 / 257卷 / 08期

基金：

俄罗斯科学基金会;

关键词：

ceramics; holmium oxide; lanthana; nanopowders; self-propagating high-temperature synthesis; HIGH-TEMPERATURE SYNTHESIS; TRANSPARENT CERAMICS; LASER CERAMICS; POLYCRYSTALLINE; FABRICATION; Y2O3; INTERFACES; POWDERS; DRAG; YAG;

D O I：

10.1002/pssb.201900500

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Transparent cubic-phase solid solution (Ho1-xLax)(2)O-3 (where x = 0, 0.03, 0.05, 0.07, and 0.1) ceramics are sintered in a vacuum at 1780 degrees C for 3 h from nanopowders made by self-propagating high-temperature synthesis. The lanthana is proved to significantly influence the microstructure of the ceramics. The average crystallite sizes of the (Ho1-xLax)(2)O-3 ceramics decrease with an increase in the concentration of lanthana. After vacuum sintering and low-temperature annealing in air, the ceramics have second-phase grains at the crystallite boundaries and the triple points. The volume fraction of the second phase is found to be in direct proportion to the lanthana content in the ceramics. This second phase is believed to be (Ho1-xLax)(2)O-3 solid solutions with a higher lanthanum content in comparison with the surrounding crystallites. Annealing of the ceramics at 1500 degrees C for 2 h leads to the elimination of the second phase.

引用

页数：7

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