(Nd_(1-x)Ca_(x))(Al_(1-x)Fe_(x))O_(3-x/2)(x=0~0.3)陶瓷铁弹性和红外发射率研究  

Ferroelasticity and infrared emissivity of(Nd_(1-x)Ca_(x))(Al_(1-x)Fe_(x))O_(3-x/2)

作　　者：张玥 王衍飞[1] 杜金平 万帆[1] 李俊生[1] 李端 刘荣军[1] ZHANG Yue;WANG Yanfei;DU Jinping;WAN Fan;LI Junsheng;LI Duan;LIU Rongjun(Science and Technology on Advanced Ceramic Fibers and Composites Laboratory,College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]国防科技大学空天科学学院新型陶瓷纤维及其复合材料重点实验室,长沙410073

出　　处：《材料工程》2023年第11期87-93,共7页Journal of Materials Engineering

基　　金：国家自然科学基金项目(U2241239)。

摘　　要：采用1600℃高温固相反应6 h,在NdAlO_(3)中引入Ca^(2+),Fe^(3+)合成(Nd_(1-x)Ca_(x))(Al_(1-x)Fe_(x))O_(3-x/2)(x=0,0.1,0.2,0.3),并采用放电等离子烧结(spark plasma sintering,SPS)陶瓷试样,探究Ca^(2+),Fe^(3+)的引入对NdAlO_(3)的物相组成、发射率和铁弹性的影响。结果表明:高温固相反应成功形成固溶体;引入Ca^(2+)和Fe^(3+)后,氧空位增加并产生轻微晶格畸变,使NdAlO_(3)在2.5~10μm的发射率最高提升至0.9;杂质离子的引入使物相由菱方相逐渐转变为立方相,从而导致铁弹畴消失,但陶瓷试样的断裂韧度仍保持较高水平。Using a high temperature solid state reaction at 1600℃ for 6 h,(Nd_(1-x)Ca_(x))(Al_(1-x)Fe_(x))O_(3-x/2)(x=0,0.1,0.2,0.3)was synthesized by introducing Ca^(2+)and Fe^(3+)into NdAlO3,and spark plasma sintering(SPS)ceramic samples were used to investigate the effects of Ca^(2+)and Fe^(3+)addition on the phase composition,emissivity and ferroelasticity of NdAlO_(3).The results show that a solid solution can be successfully fabricated through the high temperature solid state reaction.The doping of Ca^(2+)and Fe^(3+)in NdAlO_(3) increases oxygen vacancies and slight lattice distortion occurs,emissivity of NdAlO_(3) within the wavelength range of 2.5-10μm increases the maximum to 0.9.The introduction of impurity ions makes the phase gradually transform from rhombohedral to cubic,leading to the ferroelastic domains vanish.However,the fracture toughness of ceramic samples remains at a high level.

关 键 词：铝酸钕 钙钛矿 铁弹畴 发射率 掺杂 

分 类 号：TQ174.1[化学工程—陶瓷工业]