无机材料学报Issue(8)：843-847,5.DOI:10.15541/jim20150010
MgO·1.5Al2O3透明陶瓷的无压/热等静压烧结制备
Preparation of MgO·1.5Al2O3 Transparent Ceramic by Pressureless Sintering and Hot Isostatic Pressing
摘要
Abstract
Possessing unique optical and mechanical properties, magnesium aluminate spinel transparent ceramic has been regarded as an important multifunctional material. In this study, pure phase MgO·1.5Al2O3 ceramic powders with uniform and fine particle size were synthesized through solid-state reaction. A two-step structural refinement procedure, including XRD Rietveld analysis by Fullprof software and further refinement by spinel solid solutions structure mod-eling program SIDR, was utilized to resolve the crystal structure of synthesized powders. After refinement, the crystal structure was finally determined to be (Mg0.46Al0.54)IV[Mg0.26Al1.64□0.09]VIO4. Using the synthesized MgO·1.5Al2O3 ce-ramic powders, high performance transparent ceramic was fabricated by pressureless vacuum sintering and subsequent hot isostatic pressing sintering (HIP). The relative density of the sample HIP-sintered at 1850℃ for 4 h under 180 MPa Ar could reach 99.75%. In the meantime, the in-line transmittance measurement of the 2-mm-thick sample displayed good optical transparency from ultraviolet to middle-infrared wavelengths with the maximum transmittance 65% in visi-ble region and 80% in infrared region. The MgO·1.5Al2O3 transparent ceramic also exhibited good mechanical properties of Vickers hardness ((12.75 ± 0.12) GPa) and Young's modulus (277 GPa).关键词
MgO·1.5Al2O3/透明陶瓷/结构精修/热等静压Key words
MgO·1.5Al2O3/transparent ceramic/structure refinement/hot isostatic pressing分类
化学化工引用本文复制引用
袁泽,王皓,涂兵田,刘鑫,许春来,王为民,傅正义..MgO·1.5Al2O3透明陶瓷的无压/热等静压烧结制备[J].无机材料学报,2015,(8):843-847,5.基金项目
国家自然科学基金(51472195) （51472195）
中央高校基本科研业务费专项基金(WUT:2013-II-022) National Natural Science Foundation of China (51472195) （WUT:2013-II-022）
Fundamental Research Funds for the Central Universities (WUT:2013-II-022) （WUT:2013-II-022）
