聂光临,盛鹏飞,黎业华,包亦望,伍尚华.AlN粉体表面抗水解涂层的制备及其对AlN陶瓷热导率的影响[J].稀有金属材料与工程,0,():-.[Nie Guanglin,Sheng Pengfei,Li Yehua,Bao Yiwang,Wu Shanghua.Preparation of a Hydrolysis-Resistant Coating on AlN Powder Surface and Its Effect on Thermal Conductivity of AlN Ceramic[J].Rare Metal Materials and Engineering,0,():-].
本文是作者原稿,未经编辑加工,请引用时标明待出版或者标注网页。最终应以正式出版稿为准。
AlN粉体表面抗水解涂层的制备及其对AlN陶瓷热导率的影响
投稿时间:2020-05-25  修订日期:2020-06-18
中文关键词:  AlN陶瓷  化学沉淀工艺  Y2O3涂层  水解  热导率
基金项目:广东省本土科研创新团队项目(2017BT01C169);绿色建筑材料国家重点实验室开放基金;广东省基础与应用基础研究基金项目(2020A1515010004)
中文摘要:
      提升AlN陶瓷粉体的抗水解性能对于其储存和成型加工至关重要。本研究使用一种抗水解涂层作为阻止水分与AlN表面接触的屏障,以提升AlN粉体的抗水解性能。采用化学沉淀工艺在AlN粉体表面制备均匀、全包覆的非晶Y2O3涂层。利用TEM、XPS和Zeta电位测试结果详细研究了包覆层的有效性和完整性。通过测试室温下水基AlN悬浮液的pH-时间曲线以研究AlN粉体的水解性能,结果表明经包覆处理的AlN粉体能够在水中保持稳定至48 h,这就说明Y2O3表面包覆处理可以有效钝化AlN粉体,从而避免了其水解反应的发生。此外,与球磨工艺引入烧结助剂相比,化学沉淀工艺有利于提升AlN陶瓷的热导率。
Preparation of a Hydrolysis-Resistant Coating on AlN Powder Surface and Its Effect on Thermal Conductivity of AlN Ceramic
英文关键词:AlN ceramic  chemical precipitation process  Y2O3 coating  hydrolysis  thermal conductivity
英文摘要:
      Improving the hydrolysis resistance of AlN ceramic powder is crucial to the powder storage and shaping processing. In order to improve the hydrolysis resistance of AlN powder, a hydrolysis-resistant coating was used to act as a barrier layer to prevent water from coming into contact with the AlN surface in this study. An amorphous Y2O3 coating was uniformly deposited and fully wrapped on the surface of AlN powder via a chemical precipitation process. The coating effectiveness and integrity were investigated in detail by TEM, XPS and Zeta potential measurements. The hydrolytic behavior of AlN powder in an aqueous suspension was studied by following the pH vs. time at room temperature, and the results showed that the coated AlN powder was stable in water within 48 h, indicating the surface coating treatment with Y2O3 can effectively passivate AlN powder against hydrolysis. Moreover, as a way to introduce the sintering additives, the chemical precipitation process can favor an improvement of thermal conductivity of the sintered AlN ceramic, compared with the conventional ball-milling process.
作者单位
聂光临 广东工业大学 机电工程学院 
盛鹏飞 广东工业大学 机电工程学院 
黎业华 广东工业大学 机电工程学院 
包亦望 中国建筑材料科学研究总院 绿色建筑材料国家重点实验室 
伍尚华 广东工业大学 机电工程学院 
摘要点击次数: 78
全文下载次数: 0
  查看/发表评论  
关闭