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无机材料学报

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由SiO2/3Y-TZP包裹复合粉体制备ZrSiO4/3Y-TZP细晶陶瓷

王士维; 荣天君; 黄校先; 郭景坤   

  1. 中国科学院上海硅酸盐研究所 上海 200050
  • 收稿日期:2001-03-14 修回日期:2001-05-07 出版日期:2002-03-20 网络出版日期:2002-03-20

Fine-grained ZrSiO4/3Y-TZP Ceramic Hot-pressed from 3Y-TZP Powders Coated with SiO2 Layer

WANG Shi-Wei; RONG Tian-Jun; HUANG Xiao-Xian; GUO Jing-Kun   

  1. Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China）
  • Received:2001-03-14 Revised:2001-05-07 Published:2002-03-20 Online:2002-03-20

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摘要： 对湿化学法制备的ＳｉＯ２／３Ｙ－ＴＺＰ包裹复合粉体进行了热压烧结研究，并利用Ｘ射线衍射和透射电镜表征了烧结体的物相和显微结构．在低于１３００℃，复合粉体发生瞬时粘性烧结，材料密度迅速提高；随着烧结温度的升高，ＳＩＯ２和ＺｒＯ２发生反应生成ＺｒＳｉＯ４．在１５００℃热压条件下，制备了平均晶粒尺寸为３５０ｎｍ的ＺｒＳｉＯ４／３Ｙ－ＴＺＰ细晶复相材料．我们认为，在烧结过程中形成的第二相ＺｒＳｉＯ４，特别是ＳｉＯ２包裹层对抑制基体晶粒长大起主要作用．

关键词: 包裹粉, 热压, ZrSiO4/3Y-TZP

Abstract: 3Y-TZP powder coated with SiO2 layer, prepared by the wet chemical method, was hot-pressed to fine-grained ZrSiO4/3Y-TZP composite. The phases and
microstructure of the sintering bodies were characterized by X-ray diffraction and TEM. Below 1300℃, the coated powder was sintered to higher density
by means of transient viscous sintering. With increasing temperature, SiO2 reacted with ZrO2 to form ZrSiO4. ZrSiO4/3Y-TZP ceramic with an average
grain size of 350nm was obtained when the coated powder was hot-pressed at 1500℃ for 1h. It was suggested that SiO2 layer made greater contributions to the
formation of the fine-grained ZrSiO4/3Y-TZP composite.

Key words: coated powder, hot pressing, ZrSiO4/3Y-TZP

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