无机材料学报2024，Vol.39Issue(5)：531-538,8.DOI:10.15541/jim20230587
MgF2助剂对MgAl1.9Ga0.1O4透明陶瓷的制备与光学性能的影响
Effect of MgF2 Additive on Preparation and Optical Properties of MgAl1.9Ga0.1O4 Transparent Ceramics
摘要
Abstract
Currently,the preparation of MgAl1.9Ga0.1O4 transparent ceramics which possess excellent optical properties,is still relying on combining aqueous gel-casting and prolonged pressureless pre-sintering.In this work,MgF2 was used as a sintering additive,and densification process of pressureless pre-sintering was adjusted by a transient liquid phase.MgAl1.9Ga0.1O4 transparent ceramics with different sizes were prepared by dry pressing,pressureless pre-sintering,and hot isostatic pressing treatment.The effects of MgF2 additive on microstructure,optical,and mechanical properties of the samples were systematically analyzed.The results indicated that MgF2 melted at～1230 ℃,contributing to increase of density and grain size of the pre-sintered body,while the residual MgF2 was oxidized to MgO and dissolved into the MgAl1.9Ga0.1O4 lattice in the subsequent sintering process.The 2.04 mm thick transparent ceramic sample with 0.20％(in mass fraction)MgF2 has an in-line transmittance of 76.5％-83.4％in the UV and visible regions.Moreover,the sample has high optical quality with low scattering on incident light.In addition,the characteristic flexural strength of this ceramics is 167.1 MPa,which is close to that of the fine-grained MgAl2O4 transparent ceramics,but the Weibull modulus(8.81±0.29)is higher.This study provided a new option for the preparation of large MgAl1.9Ga0.1O4 transparent ceramic materials with good optical properties.关键词
透明陶瓷/MgAl1.9Ga0.1O4/MgF2/瞬时液相烧结/光学性能Key words
transparent ceramic/MgAl1.9Ga0.1O4/MgF2/transient liquid phase sintering/optical property分类
化学化工引用本文复制引用
吕朝阳,徐勇,杨久延,涂广升,涂兵田,王皓..MgF2助剂对MgAl1.9Ga0.1O4透明陶瓷的制备与光学性能的影响[J].无机材料学报,2024,39(5):531-538,8.基金项目
国家重点研发计划(2023YFB3812000) （2023YFB3812000）
国家自然科学基金(52272072) （52272072）
湖北隆中实验室自主创新研究项目(2022ZZ-13)National Key Research and Development Program of China(2023YFB3812000) （2022ZZ-13）
National Natural Science Foundation of China(52272072) （52272072）
Hubei Longzhong Laboratory Independent Innovation Research Project(2022ZZ-13) （2022ZZ-13）
