High-temperature thermal properties of yttria fully stabilized zirconia ceramics

被引：0

作者：

宋希文 ^{[1
]}

谢敏 ^{[1
]}

周芬 ^{[1
]}

贾桂霄 ^{[1
]}

郝喜红 ^{[1
]}

安胜利 ^{[1
]}

机构：

[1] School of Materials and Metallurgy,Inner Mongolia University of Science and Technology

来源：

Journal of Rare Earths | 2011年 / 29卷 / 02期

基金：

中国国家自然科学基金;

关键词：

ceramics; solid state reactions; X-ray diffraction; heat capacity; thermal conductivity; rare earths;

D O I：

暂无

中图分类号：

TQ174.75 [工业用陶瓷];

学科分类号：

080503 ;

摘要：

In this study,the dependences of yttria content,porosity and grain size on the thermal properties of Y2O3 stabilized ZrO2 (YSZ) ceramics were investigated.YSZ ceramics were synthesized by the solid state reaction method.The phase,microstructure and thermal properties of YSZ ceramics were characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM),differential scanning calorimetry (DSC) and laser-flash apparatus (LFA),respectively.The results indicated that the specific heat capacity of YSZ increased with the increase of temperature and decreased with the increase of yttria content.As the temperature increased,the thermal diffusivity and conductivity of YSZ ceramics were decreased,whereas their variations for 16YSZ,18YSZ and 20YSZ were much less pronounced than those for 12YSZ and 14YSZ.At a given temperature,the thermal conductivity of YSZ was opposite to yttria content.The thermal conductivity of YSZ ceramics almost linearly decreased with the increase of porosity.In addition,the grain size also had a great influence on the thermal conductivity.

引用

页码：155 / 159

页数：5

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