氟金云母玻璃陶瓷粉体的溶胶凝胶法制备
发布时间:2018-03-03 22:27
本文选题:氟金云母 切入点:溶胶凝胶 出处:《河南科技大学学报(自然科学版)》2017年05期 论文类型:期刊论文
【摘要】:以Mg(NO_3)_2·6H_2O、Al(NO_3)_3·9H_2O、NH_4F、NaF、CO(NH_2)_2和硅溶胶为原料,采用溶胶凝胶法制备氟金云母(NaMg_3AlSi_3O_(10)F_2)。借助X射线衍射(XRD)、同步热分析(DTA/TG)、场发射扫描电镜(FESEM)和透射电镜(TEM)等检测手段,研究了热处理温度等因素对氟金云母粉体晶相组成和晶体生长情况的影响。研究结果表明:合成粉体的物相具备典型的玻璃陶瓷材料特征,粉体直径约为30 nm。晶化热处理后粉体晶态比例显著提高,呈现尺寸较大的片状形貌。氟金云母晶相在500℃开始明显析出,随着晶化温度的适当提高,氟金云母的晶化速度显著提高,杂相也明显减少。
[Abstract]:Based on Mg(NO_3)_2 路6H _ 2O-AlNO3C _ 3 路9H _ 2O _ _ _-_ _ _. The effects of heat treatment temperature on the crystal phase composition and crystal growth of fluorophlogopite powder were studied. The diameter of the powder is about 30 nm. After the crystallization heat treatment, the proportion of crystal state of the powder increases significantly, showing a large size flake shape. The crystal phase of fluorophlogopite begins to precipitate obviously at 500 鈩,
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