| 水热-溶胶-凝胶法制备高比表面积MgAl2O4尖晶石 |
| |
| 引用本文： | 付启勇,徐育才,杜玉扣,杨平.水热-溶胶-凝胶法制备高比表面积MgAl2O4尖晶石[J].光谱实验室,2011,28(2):499-503. |
| |
| 作者姓名： | 付启勇 徐育才 杜玉扣 杨平 |
| |
| 作者单位： | 苏州大学材料与化学化工学部,江苏省苏州市独墅湖高教区仁爱路199号,215123 |
| |
| 摘 要： | 以金属硝酸盐为原料,聚乙烯醇为稳定剂,在200℃水热反应温度下制备了氧化铝和氧化镁凝胶经700℃焙烧4h后获得高纯度、结晶完整的镁铝尖晶石(MgAl2O4).用XRD、TG-DTA、SEM和BET等表征结果表明,加入PVA-124可以对胶体粒子起到保护作用,阻止胶粒因热运动碰撞而聚集,并使铝、镁氧化物胶粒均匀混合,在较...
|
| 关 键 词： | 镁铝尖晶石 溶胶-凝胶法 水热法 |
Preparation of High Specific Surface Area MgAl_2O_4 Spinel by a Hydrothermal-Sol-Gel Method |
| |
| FU Qi-Yong,XU Yu-Cai,DU Yu-Kou,YANG Ping.Preparation of High Specific Surface Area MgAl_2O_4 Spinel by a Hydrothermal-Sol-Gel Method[J].Chinese Journal of Spectroscopy Laboratory,2011,28(2):499-503. |
| |
| Authors: | FU Qi-Yong XU Yu-Cai DU Yu-Kou YANG Ping |
| |
| Institution: | FU Qi-Yong XU Yu-Cai DU Yu-Kou YANG Ping(College of Chemistry,Chemical Engineering and Materials Science,Suzhou University,Suzhou,Jiangsu 215123,P.R.China) |
| |
| Abstract: | A hydrothermal-sol-gel route,using metal nitrates as precursors and PVA-124 as the stabilizer,was developed for the synthesis of high specific surface area MgAl2O4 spinel.The well crystallization and high-purity spinel can be obtained from the alumina and magnesium oxide gel prepared by hydrothermal reaction at 200℃ and then calcination at 700℃ in air for 4h.XRD,TG-DTA,SEM and BET results showed that the added PVA-124 could protect colloidal particles from aggregation caused by thermal motion of the collision,and enhance the mixing of alumina and magnesium oxide colloidal particles.The calcination temperature for MgAl2O4 spinel formation was lower than that reported by the conventional preparation methods.By adding 20.8% PVA-124,the specific surface area of MgAl2O4 spinel can reach 153.3m2/g. |
| |
| Keywords: | Magnesium Aluminate Spinel Sol-Gel Method Hydrothermal Method |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
