烧结助剂Li_(2)CO_(3)对钽酸钇激光透明陶瓷热—力—光学性质的影响  

Effect of Sintering Agent Li_(2)CO_(3) on Thermal-Mechanical-Optical Properties of Yttrium Tantalate Transparent Ceramics

作　　者：利建雨 李家麒 马猛 葛春宇 赵子樊 冯晶[1] LI Jian-Yu;LI Jia-Qi;MA Meng;GE Chun-Yu;ZHAO Zi-Fan;FENG Jing(Faculty of Material Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China;Faculty of Material Science and Engineering,Jiamusi University,Jiamusi 154007,China)

机构地区：[1]昆明理工大学材料科学与工程学院,昆明650093 [2]佳木斯大学材料科学与工程学院,黑龙江佳木斯154007

出　　处：《现代技术陶瓷》2024年第3期268-278,共11页Advanced Ceramics

摘　　要：以五氧化二钽和氧化钇为原料,Li_(2)CO_(3)为烧结助剂,通过高温固相反应烧结法制备了钽酸钇(YTaO_(4))透明陶瓷,并系统研究了Li_(2)CO_(3)对钽酸钇陶瓷热—力—光学性质的影响。结果表明:在1530℃烧结可获得致密透明陶瓷,并且物相中含有第二相Li_(3)TaO_(4);随着烧结助剂量增加,样品中第二相含量呈上升趋势;所制备的透明陶瓷试样具有稳定的热膨胀系数,其范围在8.28.6×10^(-6)K^(-1)之间(常温-900℃);试样的杨氏模量和硬度均随着掺入烧结助剂量的增加而减小;掺入6%的烧结助剂时,YTaO_(4)陶瓷的透光率可以稳定保持在80%以上,表明YTaO_(4)陶瓷具有优越的光学性质,在激光透明陶瓷领域具有良好的应用前景。Tantalum pentoxide and yttrium oxide were used as base materials.By adding alkali metal sintering agent Li_(2)CO_(3),the doped tantalate ceramic samples were prepared by high temperature solid-phase sintering.The effects of alkali metal sintering agent Li_(2)CO_(3)on the physical and chemical properties of rare earth yttrium tantalate coating were studied by X-ray diffraction(XRD),Raman spectroscopy,scanning electron microscopy(SEM),laser pulse method(LFA),thermal-mechanical analyzer(TMA)and UV-visive-near-infrared spectrophotometer.The results show that under the sintering system at 1530℃,the ceramic is compact,resulting in Li_(3)TaO_(4) ceramic.With more Li_(2)CO_(3)inclusion,the higher Li_(3)TaO_(4) of the second phase is generated.With a stable thermal expansion coefficient,the range of 8.2-8.6×10^(-6)K^(-1)(900℃);The Young's modulus and hardness of the samples decreased with the increase of the added sintering aid dose.When 6%alkali metal sintering agent Li2O3 is mixed into the ceramic,the transmittance rate of YTaO_(4)ceramic can be stable at more than 80%,which shows that YTaO_(4)ceramic has superior potential of optical ceramics.

关 键 词：透明陶瓷 低温烧结 热膨胀系数 杨氏模量 透射率 

分 类 号：O482[理学—固体物理]