摘要
采用喷雾共沉淀法结合还原气氛处理制备了Tb_(2)O_(3)超细纳米粉体,探究了碳酸氢铵沉淀剂浓度对前驱体物相、粉体微观形貌和烧结性能的影响。研究表明,沉淀剂浓度会显著影响纳米粉体的微观形态、均匀性和烧结活性。沉淀剂浓度过低会导致沉淀物晶粒过度生长,造成粉体粒径增大和不均匀性;沉淀剂浓度过高会造成不良的软团聚。最佳沉淀剂浓度为1.5 mol/L,该条件下可获得平均粒径约为52.45 nm的超细Tb_(2)O_(3)均匀粉体,粒径分布范围为30~80 nm。粉体经1400℃的保护气氛烧结和热等静压处理后制得的Tb_(2)O_(3)透明陶瓷在1064 nm波长下Tb_(2)O_(3)透明陶瓷线性透过率为76.11%。
Ultrafine Tb_(2)O_(3) nanopowders were prepared by spray co-precipitation method combined with reduction atmosphere treatment.The influence of ammonium bicarbonate precipitant concentration on precursor phase,nanopowders microstructure,and sintering performance was investigated.The results show that the concentration of the precipitant significantly affects the microstructure,uniformity and sintering activity of the nanopowder.A low concentration of precipitant can lead to excessive growth of precipitate grains,resulting in an increase in nanopowders size and unevenness,while a excessive concentration of precipitant can cause poor soft agglomeration.The optimal precipitant concentration is 1.5 mol/L,and under this condition,ultrafine Tb_(2)O_(3) nanopowders with an average particle size of about 52.45 nm can be obtained,with a particle size distribution range of 30 nm to 80 nm.The Tb_(2)O_(3) transparent ceramic prepared by sintering the powder in a protective atmosphere at 1400℃ and hot isostatic pressing has a linear transmittance of 76.11% at 1064 nm.
作者
唐宇翔
胥涛
王耀智
敬畏
梅炳初
TANG Yuxiang;XU Tao;WANG Yaozhi;JING Wei;MEI Bingchu(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430079,China;Institute of Chemical Materials,Chinese Academy of Engineering Physics,Mianyang 621900,China)
出处
《硅酸盐通报》
CAS
北大核心
2024年第4期1499-1505,共7页
Bulletin of the Chinese Ceramic Society
基金
四川省创新人才基金(2023JDRC0015)。
作者简介
唐宇翔(1996-),男,硕士研究生。主要从事纳米粉体和透明陶瓷方面的研究。E-mail:317549@whut.edu.cn;通信作者:胥涛,工程师。E-mail:kidxiaoji@163.com;通信作者:梅炳初,博士,教授。E-mail:bcmei@whut.edu.cn。
