Fabrication of Transparent Polycrystalline Yttria Ceramics by Combination of SPS and HIP  

作　　者：何明生 李建保 林红 郭钢锋 梁龙 

机构地区：[1]State Key Laboratory of New Ceramics and Fine Processing,Department of Materials Science and Engineering,Tsinghua University

出　　处：《Journal of Rare Earths》2006年第z2期222-224,共3页稀土学报（英文版）

基　　金：Project supported by the National High Technology Research and Development Program of China (2004AA332060)

摘　　要：Transparent polyerystalline yttria is a promising optical ceramics with excellent physical and chemical properties. A commercial yttria powder with a mean particle size of 1.0μm and narrow size distribution was selected as the starting material. Transparent polyerystalline yttria ceramics without any additives were successfully prepared by hot isostatic pressing (HIP) at 1700℃for 2 h under the pressure of 200 MPa in Ar following spark plasma sintering (SPS). The as-prepared specimens consist of uniform grains of ~ 40μm. Scanning electron microscopy (SEM) images show their pore-free structure. The influences of the yttria powder and sintering process on the properties of the yttria ceramics, including the microstructure and optical properties, were further investigated in our study.Transparent polyerystalline yttria is a promising optical ceramics with excellent physical and chemical properties. A commercial yttria powder with a mean particle size of 1.0μm and narrow size distribution was selected as the starting material. Transparent polyerystalline yttria ceramics without any additives were successfully prepared by hot isostatic pressing (HIP) at 1700℃for 2 h under the pressure of 200 MPa in Ar following spark plasma sintering (SPS). The as-prepared specimens consist of uniform grains of ~ 40μm. Scanning electron microscopy (SEM) images show their pore-free structure. The influences of the yttria powder and sintering process on the properties of the yttria ceramics, including the microstructure and optical properties, were further investigated in our study.

关 键 词：transparent ceramics YTTRIA TRANSMITTANCE SPS/HIP rare earths 

分 类 号：O482.31[理学—固体物理]