无机材料学报Issue(8)：835-838,4.DOI:10.15541/jim20130618
以炭黑为还原剂制备硅酸锆晶须的研究
Preparation of Zircon Whisker Using Carbon Black as Reducing Agent
摘要
Abstract
Zircon whisker was synthesized at 700℃via non-hydrolytic Sol-Gel method using anhydrous zirconium tetrachloride (ZrCl4) as zirconium source, tetraethylorthosilicate (TEOS) as silicon source, lithium fluoride (LiF) as mineralizer, ethanol as solvent and carbon black as reducing agent. Thermogravimetric analysis and differential ther-mal analysis (TG-DTA), X-ray diffraction analysis (XRD) and transmission electron microscope (TEM) were em-ployed to characterize the influences of adding ways and amount of carbon black on the synthesis and morphology of zircon whisker. The results show that the carbon black added in form of suspension is favorable to the one-dimension growth of zircon. When 6wt%carbon black is added, optimized zircon whiskers are achieved along the growth direc-tion of [001], which diameter and aspect ratio are in the range of 30-90 nm and 6-15, respectively. Because of carbon black reacting with oxygen to form carbon dioxide and monoxide, the adding way and amount of carbon black effi-ciently regulate the oxygen partial pressure in the reaction system. Reducing oxygen partial pressure can form more SiF4 gas, which is the basis of one-dimensional direction growth of zircon. However, excessively low oxygen partial pressure is against the ZrSiO4 formation. Therefore, appropriate oxygen partial pressure can promote the growth of zircon whisker.关键词
非水解溶胶-凝胶法/炭黑/硅酸锆/晶须Key words
zircon/whisker/non-hydrolytic Sol-Gel method/carbon black分类
化学化工引用本文复制引用
王三海,江伟辉,冯果,刘健敏,苗立锋,王洪达..以炭黑为还原剂制备硅酸锆晶须的研究[J].无机材料学报,2014,(8):835-838,4.基金项目
国家自然科学基金(51162013,51362014) （51162013,51362014）
江西省主要学科学术和技术带头人培养计划(20113BCB22009) National Natural Science Foundation of China(51162013,51362014) （20113BCB22009）
Major Discipline Academic and Technical Leader Training Plan Project of Jiangxi Province(20113BCB22009) （20113BCB22009）
