中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (27): 4320-4324.doi: 10.12307/2022.862

• 组织工程口腔材料 tissue-engineered oral materials • 上一篇    下一篇

晶界偏析GeO2和TiO2共掺杂对3%氧化钇稳定氧化锆陶瓷低温老化的影响

周志伟1,牛婉琼1,任丽娟1,汪振华1,2   

  1. 1石河子大学医学院,新疆维吾尔自治区石河子市  832000;2乌鲁木齐市口腔医院,新疆维吾尔自治区乌鲁木齐市  830000
  • 收稿日期:2021-08-17 接受日期:2021-09-30 出版日期:2022-09-28 发布日期:2022-03-11
  • 通讯作者: 汪振华,主任医师,教授,硕士生导师,石河子大学医学院,新疆维吾尔自治区石河子市 832000;乌鲁木齐市口腔医院,新疆维吾尔自治区乌鲁木齐市 830000
  • 作者简介:周志伟,男,1995年生,江苏省泰兴市人,石河子大学在读硕士,医师,主要从事口腔修复与种植学研究。
  • 基金资助:
    新疆维吾尔自治区科技支疆项目计划(2019E0279),项目负责人:汪振华

Effect of grain boundary segregation on low-temperature aging of 3% yttrium oxide stabilized zirconia ceramics co-doped with GeO2 and TiO2

Zhou Zhiwei1, Niu Wanqiong1, Ren Lijuan1, Wang Zhenhua1, 2   

  1. 1School of Medicine, Shihezi University, Shihezi 832000, Xinjiang Uygur Autonomous Region, China; 2Urumqi Stomatological Hospital, Urumqi 830000, Xinjiang Uygur Autonomous Region, China
  • Received:2021-08-17 Accepted:2021-09-30 Online:2022-09-28 Published:2022-03-11
  • Contact: Wang Zhenhua, Chief physician, Professor, Master’s supervisor, School of Medicine, Shihezi University, Shihezi 832000, Xinjiang Uygur Autonomous Region, China; Urumqi Stomatological Hospital, Urumqi 830000, Xinjiang Uygur Autonomous Region, China
  • About author:Zhou Zhiwei, Master candidate, Physician, School of Medicine, Shihezi University, Shihezi 832000, Xinjiang Uygur Autonomous Region, China
  • Supported by:
    Science and Technology Supporting Xinjiang Project Plan of Xinjiang Uygur Autonomous Region, No. 2019E0279 (to WZH)

摘要:

文题释义:
氧化钇稳定氧化锆:用氧化钇粉与氧化锆粉,通过机械球磨混合、造粒、冷等静压、烧结、烘干过程制备而成,现有一次烧结和二次烧结两种工艺,经过1 450 ℃烧结出来的瓷体有良好的透明度与一定的抗折强度,可用作口腔内冠修复体材料;
元素的晶界偏析:为了研究每个元素在晶界和晶粒上的分布,采用扫描透射电子显微镜、能谱仪和高角度环形暗场探测器对材料的微观结构进行研究,根据离子在晶界聚集情况判断离子含量的方法。

背景:近年来的研究发现,TiO2 和GeO2 共掺杂可提高氧化锆的超塑性。
目的:探讨TiO2和GeO2共掺杂对3%氧化钇稳定氧化锆材料抗低温老化性能的影响。
方法:使用机械球磨法、烘干、无压烧结制备共掺杂GeO2和TiO2的3%氧化钇稳定氧化锆材料,其中3%氧化钇稳定氧化锆的摩尔百分比均为98%,TiO2粉末(纯度99.8%)与GeO2粉末的摩尔百分比分别为1.5%,0.5%,记为1.5Ti-0.5Ge组;TiO2粉末(纯度99.99%)与GeO2粉末的摩尔百分比分别为1%,1%,记为1Ti-1Ge组;TiO2粉末(纯度99.8%)与GeO2的粉末摩尔百分比分别为0.5%,1.5%,记为0.5Ti-1.5Ge组。采用扫描透射电子显微镜、能谱仪等研究材料的微观结构;在高压釜中处理后,采用X射线衍射仪测量所有样品的转化量。
结果与结论:①扫描透射电子显微镜下可见,GeO2和TiO2共掺3%氧化钇稳定氧化锆材料的复合粉体粒径均匀,分布在50 nm左右,颗粒形状基本呈球形,分散性好,但有少量团聚;X射线能谱仪检测显示,四价稳定剂(Ge4+,Ti4+)可以抑制氧化锆材料的低温老化效应,随着GeO2掺杂量的增加,氧化锆的抗水热老化性能提高;能谱仪检测显示,随着掺杂剂含量的增加,晶界偏析程度增强,但即使Ge4+的掺杂量较小,晶界偏析程度也可与掺杂量大的Ti4+相媲美;②结果表明,添加GeO2和TiO2可提高3%氧化钇稳定氧化锆陶瓷的抗低温老化性能,其中GeO2在抗低温老化方面优于TiO2,可作为首选。

https://orcid.org/0000-0002-4298-8868 (周志伟) 

中国组织工程研究杂志出版内容重点:生物材料;骨生物材料;口腔生物材料;纳米材料;缓释材料;材料相容性;组织工程

关键词: 机械球磨法, 晶界偏析, 抗低温老化性能, 二氧化锗, 二氧化钛, 氧化锆, X射线衍射

Abstract: BACKGROUND: Many recent studies have found that zirconia co-doped with TiO2 and GeO2 exhibits excellent superplasticity. 
OBJECTIVE: To investigate the improvement of anti-cryogenic aging properties of zirconia materials stabilized by 3% yttrium oxide co-doped with TiO2 and GeO2.
METHODS: The 3% yttrium oxide stabilized zirconia material samples co-doped with GeO2 and TiO2 were prepared by mechanical ball milling, drying, and pressure free sintering. Among them, the mole percentage of 3% yttrium oxide stabilized zirconia was 98%. The mole percentages of TiO2 powder (purity 99.8%) and GeO2 powder were 1.5% and 0.5%, respectively, which was recorded as the 1.5Ti-0.5Ge group. The mole percentages TiO2 powder (purity) 99.99%) and GeO2 powder were 1% and 1%, respectively, which was recorded as 1Ti-1Ge group. The mole percentages of TiO2 powder (purity 99.8%) and GeO2 powder were 0.5%, 1.5%, respectively, which was recorded as 0.5Ti- 1.5Ge group. The microstructure of all samples was investigated by scanning transmission electron microscopy and energy spectroscopy. After treatment in an autoclave, the conversion of all samples was measured by an X-ray diffractometer.
RESULTS AND CONCLUSION: (1) Scanning transmission electron microscopy results showed that the composite powders of a 3% yttrium oxide stabilized zirconia material co-doped with GeO2 and TiO2 had uniform particle size and were distributed over a 50 nm; the particle shape was basically spherical and well dispersed, but there was a small amount of agglomeration. X-ray diffractometer exhibited that the Ge4+, Ti4+ stabilizers could inhibit the low-temperature aging effect of zirconia materials. With the increase of the doping amount of GeO2, the low-temperature aging resistance of zirconia could be improved. Energy spectrometer detection demonstrated that with the increase of dopant content, the degree of grain boundary segregation increased, but even if the doping amount of Ge4+ was small, the degree of grain boundary segregation could be comparable to that of Ti4+ with a large amount of doping. (2) The results suggest that the addition of GeO2 and TiO2 improved 3% yttrium oxide stabilized zirconia ceramics against low-temperature aging properties. GeO2 is superior to TiO2 in resisting low-temperature aging and can be used as the first choice. 

Key words: mechanical ball milling, grain boundary segregation, low-temperature aging resistance, germanium dioxide, titanium dioxide, zirconia, X-ray diffraction

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