Influence of sintering temperature on microstructure and properties of SiO2 ceramic incorporated with boron nitride nanotubes

被引：25

作者：

Du, Ming ^{[1
,2
]}

Bi, Jian-Qiang ^{[1
,2
,3
,4
]}

Wang, Wei-Li ^{[1
,2
]}

Sun, Xiao-Lin ^{[1
,2
]}

Long, Na-Na ^{[1
,2
]}

机构：

[1] Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Peoples R China

[2] Shandong Univ, Engn Ceram Key Lab Shandong Prov, Jinan 250061, Peoples R China

[3] Univ Georgia, Dept Phys & Astron, Fac Engn, Athens, GA 30602 USA

[4] Univ Georgia, Nanosci & Engn Ctr, Athens, GA 30602 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2012年 / 543卷

基金：

中国国家自然科学基金;

关键词：

SiO2; Hot pressing; Sintering temperature; Mechanical and dielectric properties; MECHANICAL-PROPERTIES; DIELECTRIC-PROPERTIES; COMPOSITE;

D O I：

10.1016/j.msea.2012.02.065

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Silica (SiO2) ceramic containing 5 wt% boron nitride nanotubes (BNNTs) was fabricated by hot pressing at 1200-1450 degrees C. The influences of the sintering temperature on phase composition, relative density, microstructure and mechanical and dielectric properties were investigated, respectively. As the increase of sintering temperature, mechanical properties varied dramatically, while the relative density and dielectric constant increased during the range of sintering temperature. The composite sintered at 1400 degrees C exhibited superior properties, attaining flexure strength of 120.5 MPa, fracture toughness of 1.21 MPa m(1/2), dielectric constant of 4 and relative density of 92%. Particularly, flexure strength and fracture toughness were about 230.8% and 208.6% higher than those of monolithic SiO2, respectively. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.

引用

页码：271 / 276

页数：6

共 28 条

[1] Multi-walled carbon nanotubes reinforced Al2O3 nanocomposites: Mechanical properties and interfacial investigations [J].