华西口腔医学杂志 ›› 2017, Vol. 35 ›› Issue (5): 461-467.doi: 10.7518/hxkq.2017.05.003

• • 上一篇    下一篇

Al2O3-氮化硼纳米晶包覆的3%氧化钇稳定的四方氧化锆多晶复合陶瓷粉体的制备

吴金双1,2(), 周磊1, 邢鹤琳1, 王喆3, 董超芳3, 杨瑟飞1()   

  1. 1.中国人民解放军总医院口腔科,北京 100853
    2.云南省玉溪市人民医院口腔科,玉溪 653100
    3.北京科技大学新材料技术研究院,北京 100083
  • 收稿日期:2017-01-05 修回日期:2017-04-02 出版日期:2017-10-01 发布日期:2017-10-01
  • 作者简介:

    吴金双,住院医师,硕士,E-mail:wujinshuang522@163.com

  • 基金资助:
    国家自然科学基金(81371183);海南省社会发展科技专项资金(sf201311)

Preparation processes of 3% yttria-stabilized tetragonal zirconia polycrystalline ceramic composite powders coated with nano-sized Al2O3-boron nitride

Jinshuang Wu1,2(), Lei Zhou1, Helin Xing1, Zhe Wang3, Chaofang Dong3, Sefei Yang1()   

  1. 1. Dept. of Stomatology, The Chinese PLA General Hospital, Beijing 100853, China
    2. Dept. of Stomatology, People’s Hospital of Yuxi City in Yunnan Province, Yuxi 653100, China
    3. Institute of New Materials Technology, Beijing University of Science and Technology, Beijing 100083, China
  • Received:2017-01-05 Revised:2017-04-02 Online:2017-10-01 Published:2017-10-01
  • Supported by:
    National Natural Science Foundation of China (81371183);Technology Special Funds for Social Development in Hainan Province (sf201311)

摘要:

目的 研究非均相沉淀法制备3%氧化钇稳定的四方氧化锆多晶陶瓷(3Y-TZP)/3%Al2O3复合粉的最佳pH值;3Y-TZP/3%Al2O3/10%BN双相包覆中,合成Al2O3及非晶氮化硼(BN)的最佳热处理温度。方法 不同pH值(6.5、7.5、8.5、9.5)下,通过非均相沉淀法合成Al2O3前驱体包覆3Y-TZP粉,通过透射电镜(TEM)选出包覆形貌较均匀的一组。将此pH下制备的复合粉经不同的温度(800、1 000、1 200、1 400 ℃)处理后,硼酸尿素反应烧结法(N2保护下,850 ℃煅烧5 h,850 ℃煅烧3 h及800 ℃煅烧5 h,800 ℃煅烧3 h)合成10%BN包覆3Y-TZP/3%Al2O3粉,通过TEM、能谱分析及X射线衍射(XRD)选出形貌及相组成最佳的一组。结果 当pH值为8.5时,3%Al2O3前驱体均匀地包覆在3Y-TZP颗粒周围;3%Al2O3前驱体经1 200 ℃煅烧,再包覆10%BN,在N2保护下800 ℃煅烧5 h,此时可见3Y-TZP颗粒周围包覆Al2O3及非晶BN,3Y-TZP/3%Al2O3/10%BN复合粉中Al-B-O化合物较少,且t-ZrO2所占的比例最多。结论 合成Al2O3前驱体包覆3Y-TZP的最佳pH值为8.5;双相包覆中,Al2O3前驱体的最佳处理温度为1 200 ℃,合成非晶BN的适宜条件为N2保护下800 ℃煅烧5 h。

关键词: 氧化锆, 复合陶瓷, Al2O3-氮化硼包覆, pH, 煅烧温度

Abstract:

Objective In this work, we aim to determine the optimum pH value for the preparation of 3% yttria-stabilized tetragonal zirconia polycrystalline (3Y-TZP)/3%Al2O3 and optimum calcination temperature of Al2O3 precursor and amorphous boron nitride (BN) for Al2O3-BN coating 3Y-TZP powders. Methods The 3Y-TZP/3%Al2O3 composite powders were prepared through the heterogeneous precipitation method under different pH values (6.5, 7.5, 8.5, and 9.5) and analyzed through trans-mission electron microscopy (TEM) to determine the optimum coating morphology. Al2O3 precursor, which was prepared under the optimum pH value, was calcined at different temperatures (800, 1 000, 1 200, and 1 400 ℃). The amorphous BN coating 3Y-TZP/3%Al2O3 powder was prepared via in situ reaction with boric acid and urea (calcined with N2 at 850 ℃ for 5 and 3 h and 800 ℃ for 5 and 3 h). TEM, energy dispersive spectrometry (EDS), and X-ray diffraction (XRD) were performed to characterize the results. Results The optimum coating morphology was obtained at 8.5 pH. When the Al2O3 precur-sor was calcined at 1 200 ℃ and coated with BN (calcined with N2 at 800 ℃ for 5 h), the Al-B-O compound was less, and t-ZrO2 was more represented. Conclusion The optimum pH value for 3Y-TZP/3%Al2O3 composite preparation is 8.5. For the preparation of Al2O3-BN coating 3Y-TZP powders, the optimum calcination temperature of the Al2O3 precursor and amorphous BN are 1 200 and 800 ℃, respectively.

Key words: zirconia, composite ceramic, Al2O3-boron nitride coating, pH, calcination temperature

中图分类号: