化工进展

• 材料科学与技术 • 上一篇    下一篇

共沉淀法制备掺钕钇铝石榴石透明陶瓷:滴加方式的影响

向定艾,苟 立,冉均国   

  1. (四川大学材料学院,四川 成都 610065)
  • 出版日期:2011-03-05 发布日期:2011-03-05

Fabrication of neodymium-doped yttrium aluminium garnet transparent ceramics by co-precipitation:The effect of titration precipitation method

XIANG Dingai,GOU Li,RAN Junguo   

  1. (School of Materials Science and Engineering,Sichuan University,Chengdu 610065,Sichuan,China)
  • Online:2011-03-05 Published:2011-03-05

摘要:

用共沉淀法正滴和反滴工艺制备了掺钕钇铝石榴石(Nd:YAG)粉体。测试了粉体的相组成、显微形貌、粒度分布。结果表明:经1100 煅烧后,正滴工艺得到粉体主相为YAGY3Al5O12),但有少量的YAMY4Al2O9),反滴工艺则得到纯的YAG。晶粒尺寸分别为24.7 nm 26.6 nm,平均粒径分别为1.26 mm1.86 mm,前者的粒径分布要窄,分散性要好。采用真空烧结技术在1800 烧结制备了NdYAG陶瓷,正滴工艺制备YAG陶瓷晶粒间存在少量气孔,反滴工艺样品存在少量大的孔洞和许多晶界气孔。厚1 mm抛光样品在1064 nm处透过率分别为72%42%,在400 nm处分别为65%35%

Abstract:

Neodymium-doped yttrium aluminium garnetNd:YAGpowders were synthesized by co-precipitation with forward-titration and reverse-titrationrespectively. The phase compositionmorphologyparticle size distribution of the powders were determined. The powder obtained by forward-titration was of major-phase YAG and a trace amount of YAM with a grain size about 24.7 nmwhile the powder by reverse-titration was of pure-phase YAG with a grain size 26.6 nm. The average particle sizes of these powders were 1.26 mm and 1.86 mm respectively. The former was well dispersed with a narrow size distribution. Nd:YAG transparent ceramic was sintered at 1800 in vacuum. A few pores were observed in the forward-titration sample as compared with a few big holes and more pores at the grain boundaries of the reverse-titration sample. The transmission of the polished samples with thickness of 1mm were 72% and 42% at 1064 nm65% and 35% at 400 nm respectively.

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