两步烧结对牙科氧化锆陶瓷微观组织的影响

doi:10.7518/hxkq.2013.05.013

华西口腔医学杂志

两步烧结对牙科氧化锆陶瓷微观组织的影响

蹇超李宁吴之凯腾劲颜家振

四川大学制造科学与工程学院功能材料实验室，成都 610065

收稿日期:2012-06-16 修回日期:2013-04-22 出版日期:2013-10-01 发布日期:2013-10-01
通讯作者: 李宁，Tel：028-85405320
作者简介:蹇超（1987—），男，四川人，硕士

Influence on microstructure of dental zirconia ceramics prepared by two-step sintering

Jian Chao, Li Ning, Wu Zhikai, Teng Jing, Yan Jiazhen.

Functional Materials Laboratory, School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China

Received:2012-06-16 Revised:2013-04-22 Online:2013-10-01 Published:2013-10-01

摘要/Abstract

摘要：

目的研究两步烧结工艺对牙科氧化锆陶瓷微观组织的影响。方法纳米氧化锆经过干压、冷等静压成型后预烧，切削加工成试样，采用传统烧结、单步烧结和两步烧结工艺，通过对试样密度和晶粒大小的测定，得出了两步烧结中较高温度T1与较低温度T2的大致范围，对比了两步烧结与传统烧结的微观组织，研究两步烧结中T1、T2对微观组织的影响。结果两步烧结中T1、T2的大致范围分别为1 450～1 550 ℃和1 250～1 350 ℃；两步烧结相对于传统烧结，密度更高，晶粒更细，组织更均匀；T1主要影响晶粒尺寸，对致密度影响不大；T2主要影响致密度，而对晶粒大小影响不明显。结论两步烧结能够在高致密化情况下细化晶粒，有利于优化牙科氧化锆陶瓷材料的微观组织。

关键词: 氧化锆, 两步烧结, 晶粒, 微观组织

Abstract:

Objective To investigate the microstructure of dental zirconia ceramics prepared by two-step sintering. Methods Nanostructured zirconia powder was dry compacted, cold isostatic pressed, and pre-sintered. The pre-sintered discs were cut processed into samples. Conventional sintering, single-step sintering, and two-step sintering were carried out, and density and grain size of the samples were measured. Afterward, T1 and/or T2 of two-step sintering ranges were measured. Effects on microstructure of different routes, which consisted of two-step sintering and conventional sintering were discussed. The influence of T1 and/or T2 on density and grain size were analyzed as well. Results The range of T1 was between 1 450 ℃ and 1 550 ℃, and the range of T2 was between 1 250 ℃ and 1 350 ℃. Compared with conventional sintering, finer microstructure of higher density and smaller grain could be obtained by two-step sintering. Grain growth was dependent on T1, whereas density was not much related with T1. However, density was dependent on T2, and grain size was minimally influenced. Conclusion Two-step sintering could ensure a sintering body with high density and small grain, which is good for optimizing the microstructure of dental zirconia ceramics.

Key words: zirconia, two-step sintering, grain, microstructure

蹇超李宁吴之凯腾劲颜家振. 两步烧结对牙科氧化锆陶瓷微观组织的影响[J]. 华西口腔医学杂志, doi: 10.7518/hxkq.2013.05.013.

Jian Chao, Li Ning, Wu Zhikai, Teng Jing, Yan Jiazhen.. Influence on microstructure of dental zirconia ceramics prepared by two-step sintering[J]. West China Journal of Stomatology, doi: 10.7518/hxkq.2013.05.013.

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两步烧结对牙科氧化锆陶瓷微观组织的影响

Influence on microstructure of dental zirconia ceramics prepared by two-step sintering

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