Microstructure and mechanical properties of MgO-doped Al2TiO5 prepared by reactive sintering

被引：13

作者：

Maki, Ryosuke ^{[1
]}

Suzuki, Yoshikazu ^{[1
,2
]}

机构：

[1] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058573, Japan

[2] Univ Tsukuba, Fac Pure & Appl Sci, Tsukuba, Ibaraki 3058573, Japan

来源：

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN | 2013年 / 121卷 / 1415期

关键词：

Al2TiO5; MgO; MgAl2O4; Fracture strength; ALUMINUM TITANATE CERAMICS; AL2TIO5-MGTI2O5; SOLID-SOLUTIONS; THERMAL-EXPANSION BEHAVIOR; UNIFORMLY POROUS MGTI2O5; COMPOSITES; ADDITIVES; TEMPERATURE; STRENGTH; TIALITE;

D O I：

10.2109/jcersj2.121.568

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：

MgO-doped Al2TiO5 ceramics were reactively sintered from commercial alpha-Al2O3, TiO2 anatase and MgCO3 (basic) powders. Powder mixtures with molar ratio of Al2O3:TiO2:MgO = 1:1:0, 1:0.95:0.05, 1:0.90:0.10, and 1:0.85:0.15 were prepared by wet ball-milling with ZrO2 media. The green pellets were sintered at 1300-1500 C for 2 h in air to obtain dense samples. With changing the MgO doping amount, Al2TiO5/Al2O3, Al2TiO5/MgAl2O4/Al2O3, Al2TiO5/MgAl2O4 composites were synthesized. MgO doping was effective to reduce the Al2TiO5 matrix grain size and to reduce the strong anisotropy of Al2TiO5, which resulted in fewer microcracks. The maximum strength of samples sintered at 1400 and 1500 degrees C were 106 and 32MPa (15 mol% MgO), respectively. (C)2013 The Ceramic Society of Japan. All rights reserved.

引用

页码：568 / 571

页数：4

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