摘要
采用溶胶-凝胶法合成了β-锂霞石超细粉体,利用差热-热重分析仪、X-射线衍射仪、扫描电子显微镜等对溶胶-凝胶的形成以及样品的物相和形貌进行分析。研究了柠檬酸与金属离子比、溶液的pH值、成胶温度,粉体灼烧温度和时间等对样品物相和形貌的影响。结果表明,当柠檬酸与金属离子比为2:1、pH=3、温度控制在65℃时,得到稳定的溶胶,蒸发干燥后的凝胶在900℃~1300℃温度范围进行煅烧,获得了物相纯度较高的β-锂霞石粉体,粒径约20nm^50nm。
β-Eucryptite powders was synthesized through sol-gel method.TG-DSC,XRD and SEM were employed to study the sol-gel formation,crystalline phase and morphology of the samples.Effects of citric acid to metal ions ratio,pH value of the solution,sol and gel temperature and firing temperature and time were studied.Results indicated that clear gel could be obtained when citric acid to metal ions ratio is 2：1,pH value is 3 at 65℃.The pure phase β-Eucryptite powders with sizes of 20~50nm were obtained when fired at 900~1300℃.
出处
《长春理工大学学报（自然科学版）》
2011年第4期97-99,105,共4页
Journal of Changchun University of Science and Technology(Natural Science Edition)
