以砂状氢氧化铝为前驱体水热法制备勃姆石试验研究
Hydrothermal preparation of boehmite with sandy aluminum hydroxide as precursor
范伟东 1肖劲 2仲奇凡2
作者信息
- 1. 洛阳职业技术学院机电工程学院,洛阳河南 471099
- 2. 中南大学冶金与环境学院,长沙湖南 410083
- 折叠
摘要
随着锂电池隔膜涂层用勃姆石产品市场需求量逐年提高,勃姆石产品有了很好的应用价值,以氢氧化铝为前驱体水热制备亚微米勃姆石技术研究是最有利于产业化生产的技术方案.本文开展了前驱体料浆固含、水热反应温度、水热反应时间、氢氧化铝前驱体粒度等反应条件对水热过程勃姆石转化率的影响规律试验研究,并对生成机理进行了分析.试验结果表明,水热反应温度对生成的勃姆石转化率影响最为明显,随着水热过程反应温度的升高,所需反应时间逐渐减少.当水热温度为180 ℃时,60 min内几乎不发生相变;当水热温度为200℃,反应时间大于45 min时,氢氧化铝可以全部发生相变,转化为勃姆石;当反应温度为220 ℃时,反应15 min即可全部发生转相.水热反应生成的勃姆石原晶粒度都是很细的四角菱形体,最终生成的勃姆石是由原晶粒度团聚而成的团聚体.本研究可为以砂状氢氧化铝为前驱体水热法制备锂电池用勃姆石产品提供最基础的反应规律技术数据.
Abstract
With the quickly increasing of demanding in the lithium ion battery diaphragm,boehmite were valuable accordingly.The hydrothermal preparation of boehmite with aluminium hydroxide as precursor is a technical proposal which is easily to be applied in the plant.The influence of reaction conditions,such as slurry solid content,reaction temperature,reaction time and particle size of precursoron conversion rate of boehmite were researched in the article.The results showed that the reaction temperature was the most important influence factor in all tests.The conversion was scarcely occurred when the reaction temperature was less than 180,the conversion were finished more than 45 minutes when the temperature was 200.when the temperature was 220,the conversion was finished in 15 minutes.The original particle of boehmite from hydrothermal preparation was presented in a quadrangular rhombic shape in a submicron scale,the final product was agglomeration of submicrom particles.The research results showed some basic reaction behaviors in hydrothermal preparation boehmite,which can be used to produce boehmite in lithium ion battery diaphragm.
关键词
氢氧化铝/勃姆石/水热法/水热温度/生成机理Key words
aluminum hydroxide/boehmite/hydrothermal reaction/reaction temperature/formation mechanism引用本文复制引用
出版年
2024
NETL
NSTL
万方数据