Lu_(2)O_(3)-MgO纳米粉体合成及其复相红外透明陶瓷制备  

Lu_(2)O_(3)-MgO Nano-powder:Synthesis and Fabrication of Composite Infrared Transparent Ceramics

作　　者：满鑫 吴南 张牧 贺红亮[4] 孙旭东[3,5] 李晓东 MAN Xin;WU Nan;ZHANG Mu;HE Hongliang;SUN Xudong;LI Xiaodong(School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China;School of Mechanical Engineering,Shenyang University,Shenyang 110044,China;Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education),Northeastern University,Shenyang 110819,China;National Key Laboratory of Shock Wave and Detonation Physics,Institute of Fluid Physics,China Academy of Engineering Physics,Mianyang 621900,China;Foshan Graduate School,Northeastern University,Foshan 528311,China)

机构地区：[1]东北大学材料科学与工程学院,沈阳110819 [2]沈阳大学机械工程学院,沈阳110044 [3]东北大学材料各向异性与织构教育部重点实验室,沈阳110819 [4]中国工程物理研究院流体物理研究所,冲击波物理与爆轰物理重点实验室,绵阳621900 [5]东北大学佛山研究生院,佛山528311

出　　处：《无机材料学报》2021年第12期1263-1269,共7页Journal of Inorganic Materials

基　　金：国家重点研发计划(2017YFB0310300);教育部基本科研业务费(N180212009);国家自然科学基金(51872033)。

摘　　要：细化陶瓷微观结构至纳米级,可以减少光的散射损失,为开发新型光学陶瓷提供了一种有效的方法。本研究采用溶胶-凝胶法合成粉体,结合热压烧结工艺制备出光学性能优异的新型Lu_(2)O_(3)-MgO纳米复合陶瓷,研究了粉体合成条件及热压烧结工艺对样品微观结构的影响,并对计算的理论透过率与样品的实际透过率进行了比较。研究结果表明:采用优化后工艺制备的Lu_(2)O_(3)-MgO陶瓷具有均匀的相域分布,晶粒尺寸约为123 nm,3~5μm波段的透过率高达84.5%~86.0%,接近理论透过率;维氏硬度为12.2 GPa,断裂韧性为2.89 MPa·m^(-1/2),抗弯强度达到(221±12)MPa,是一种潜在的红外透明窗口材料。Refining ceramic microstructures to nanometric range to minimize light scattering provides an effective methodology for developing novel optical ceramic materials.In this study,we reported the fabrication and properties of a new nanocomposite optical ceramic of Lu_(2)O_(3)-MgO by using nano powders synthesized via Sol-Gel method and hot-pressing sintering technology.Influence of powder synthesis conditions and hot-pressing sintering process on the microstructure of the sample was investigated,and the theoretical transmittance of the sample was calculated and compared with the measured transmittance.The results show that the Lu_(2)O_(3)-MgO ceramic fabricated by optimizing process exhibts a homogeneous phase domain distribution,a fine-grain size of 123 nm,a high transmittance of 84.5%-86.0%over the 3-5μm wavelength range,close to the theoretical transmittance,and enhanced hardness value of 12.2 GPa,toughness value of 2.89 MPa·m^(-1/2)and bending strength value of(221±12)MPa,indicating potential application in infrared transparent window material.

关 键 词：溶胶-凝胶法 热压烧结 Lu_(2)O_(3)-MgO 纳米复合陶瓷 红外窗口材料 

分 类 号：TQ174[化学工程—陶瓷工业]