Effect of Nb2O5 addition on microstructure and thermal/mechanical properties in zirconia-toughened alumina sintered at low temperature

被引：11

作者：

Seong, Woong-Kyeong ^{[1
,2
]}

Ahn, Byeong-Min ^{[1
]}

Min, Yuho ^{[1
]}

Hwang, Geon-Tae ^{[1
]}

Choi, Jong-Jin ^{[1
]}

Choi, Joon-Hwan ^{[1
]}

Hahn, Byung-Dong ^{[1
]}

Cho, Young-Rae ^{[2
]}

Ahn, Cheol-Woo ^{[1
]}

机构：

[1] Korea Inst Mat Sci KIMS, Funct Ceram Dept, Powder & Ceram Div, Chang Won 641831, Gyeongnam, South Korea

[2] Pusan Natl Univ, Dept Mat Sci & Engn, Pusan 46241, South Korea

来源：

CERAMICS INTERNATIONAL | 2020年 / 46卷 / 15期

关键词：

Alumina; Low temperature sintering; Microstructure; Thermal conductivity; Flexural strength; MECHANICAL-PROPERTIES; CERAMICS; ZRO2;

D O I：

10.1016/j.ceramint.2020.06.158

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：

In the ceramic industry, alumina is widely used as a heat dissipation substrate, and the sintering temperature of alumina is known to be higher than 1500 degrees C. Nb2O5 is added to lower the sintering temperature of alumina, and the effect of the additive on the microstructure of the sintered specimen is described in this manuscript. The Nb2O5 powder ground by a planetary ball-mill is added to alumina in order for a Nb2O5 particle to be effectively dispersed among the alumina particles. In addition, Y-stabilized zirconia (YSZ) is also added to suppress the rapid grain growth due to the addition of Nb2O5. Consequently, a thermal conductivity of 34.1 W/mK and a flexural strength of 385 MPa were obtained in the alumina specimen sintered at 1400 degrees C. These properties are similar to those of a commercial alumina currently used for ceramic substrates. This material has a considerable advantage at the cost of process owing to the sintering temperature of 1400 degrees C.

引用

页码：23820 / 23827

页数：8

共 19 条

[1] Processing and Properties of Zirconia-Toughened Alumina Prepared by Gelcasting [J].