溶胶-凝胶法制备TiO2包覆cBN复合粉的工艺及性能
Process and Property of TiO2 Coating cBN Composite Powder Prepared by Sol-Gel Method
摘 要
以无水乙醇和水为分散介质，钛酸丁酯为钛源，采用溶胶-凝胶法在立方氮化硼（cBN）颗粒表面包覆TiO2制备cBN-TiO2复合粉，研究了无水乙醇与钛酸丁酯物质的量比、cBN与钛酸丁酯物质的量比对包覆效果的影响，对制备工艺进行了优化，并分析了最优工艺下cBN-TiO2复合粉的抗氧化性能。结果表明：当无水乙醇与钛酸丁酯的物质的量的比为10：1、cBN与钛酸丁酯的物质的量的比为1：1时，cBN颗粒表面均匀地包覆了一层致密的TiO2，包覆效果最好；最优工艺下cBN-TiO2复合粉的开始氧化温度为900℃，比包覆TiO2前cBN微粉的提高了220℃。
溶胶-凝胶法
包覆
抗氧化性能
cubic boron nitride
sol-gel method
coating
oxidation resistance
Abstract
A layer of TiO2 was coated on the surface of cubic boron nitride (cBN) particles by sol-gel method with anhydrous ethanol and water as dispersion medium and with tetrabutyl titanate as titanium source, and then cBN-TiO2 composite powders were obtained. The effects of the molar ratio of anhydrous ethanol to butyl titanate and the molar ratio of cBN to butyl titanate on the coating effect were investigated. The preparation process was optimized. The oxidation resistance of cBN-TiO2 composite powder under optimal process was studied. The results show that the surface of cBN particles was coated with a layer of dense TiO2 uniformly when the molar ratio of anhydrous ethanol to butyl titanate was 10∶1 and the molar ratio of cubic boron nitride to butyl titanate was 1∶1, indicating the best coating effect. The initial oxidation temperature of cBN-TiO composite powder prepared under optimal process was 900 ℃, and was 220 ℃ higher than that of cBN micro powder before coating with TiO2.
中图分类号 TB321 DOI 10.11973/jxgccl201809008
所属栏目 新材料 新工艺
基金项目 河南省自然科学基金资助项目（162300410242）；郑州大学优秀青年教师发展基金资助项目（1421320044）
收稿日期 2017/7/31
修改稿日期 2018/8/14
网络出版日期
作者单位点击查看
备注梁力行(1992-),男,广西桂平人,硕士研究生
引用该论文: LIANG Lixing,WANG Hailong,LI Jian,HU Biyong,SHAO Gang,XU Hongliang,LU Hongxia,FAN Bingbing,ZHANG Rui. Process and Property of TiO2 Coating cBN Composite Powder Prepared by Sol-Gel Method[J]. Materials for mechancial engineering, 2018, 42(9): 37～40
梁力行,王海龙,李剑,胡碧涌,邵刚,许红亮,卢红霞,范冰冰,张锐. 溶胶-凝胶法制备TiO2包覆cBN复合粉的工艺及性能[J]. 机械工程材料, 2018, 42(9): 37～40
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【3】HUANG Z, MANESS P C, BLAKE D M, et al. Bactericidal mode of titanium dioxide photocatalysis[J].Journal of Photochemistry & Photobiology A Chemistry, 1999, 130(2/3):163-170.
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【5】KRNEL K, MAGLICE A, KOSMAC T. β-SiAlON/TiN nanocomposite sprepared from TiO2-coated Si3N4 power[J]. Journal of the European Ceramic Society, 2006, 416(1/2):104-108.
【6】姜铸峰,吴一,邹正光,等.立方氮化硼粉体的表面活化改性及其影响的研究[J].中国陶瓷,2016,52(8):52-53.
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