固态Si颗粒调控Na_(2)O-CaO-SiO_(2)多孔微晶玻璃气孔结构机制  

Mechanism of solid silicon particles controlling bubble structure in Na_(2)O-CaO-SiO_(2) porous glass-ceramics

作　　者：管世翾 严明明[2] 曹建尉[2] 王志[2] 常雅丽 GUAN Shi-xuan;YAN Ming-ming;CAO Jian-wei;WANG Zhi;CHANG Ya-li(China Circular Economy Association,Beijing 100037,China;Key Laboratory of Green Process Engineering,National Engineering Research Center for Green Recycling of Strategic Metal Resources,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China;School of Mechanical Electronic and Information Engineering,China University of Mining and Technology,Beijing 100083,China)

机构地区：[1]中国循环经济协会,北京100037 [2]中国科学院过程工程研究所,战略金属资源绿色循环利用国家工程研究中心,中科院绿色过程工程重点实验室,北京100190 [3]中国矿业大学(北京)机电与信息工程学院,北京100083

出　　处：《矿冶》2023年第2期73-81,共9页Mining And Metallurgy

基　　金：国家自然科学基金资助项目(51934006)。

摘　　要：针对Na_(2)O-CaO-SiO_(2)(NCS)多孔微晶玻璃内部气孔大小不同、分布不均问题,提出通过添加固态Si颗粒调控NCS多孔微晶玻璃孔结构。通过扫描电子显微镜(SEM)、图像处理软件Image pro plus 6.0、DSC等分析手段研究固态Si颗粒对NCS多孔微晶玻璃内部热场、液相的影响,以及Si颗粒调控NCS多孔微晶玻璃气泡成核机制。结果表明,通过加入固态Si颗粒可以使NCS多孔微晶玻璃基础配合料内部热扩散速率提高23.5%,NCS多孔微晶玻璃内部液相产生温度降低60℃,液相产生速率增大7~8倍;在固态Si颗粒周围先产生液相,液相中的气泡分子在固态Si颗粒表面非均相成核,随着配合料温度的升高,无固态Si颗粒位置处产生新的液相,液相中气泡分子扩散至固态Si颗粒表面促进原始气泡长大或者在新液相中均相成核。Aiming at the unequal distribution of pores in the materials,this paper put forward that solid silicon particles to control the bubble nucleation mechanism within Na_(2)O-CaO-SiO_(2)(NCS)porous glass-ceramics.The effects of solid silicon particles on the thermal field and liquid phase inside NCS porous glass-ceramic were studied using scanning electron microscopy(SEM),image processing software Image pro plus 6.0,differential scanning calorimeter(DSC),and other analytical methods,and the bubble nucleation mechanism of silicon particles regulating NCS porous glass-ceramic was investigated.The results show that the internal thermal diffusion rate of the NCS porous glass-ceramic base batch could be increased by 23.5%,the internal liquid phase generation temperature could be reduced by 60℃,and the liquid phase generation rate could be increased by 7-8 times.We found that the liquid phase formed initially around the solid silicon particles,the liquid bubble molecules formed from uneven nucleation on the surface of the solid silicon particles.With the temperature increasing,solid silicon particles were not located to produce a new liquid phase.The bubble molecules in the new liquid phase diffused to the surface of the solid silicon particles,promoting the growth of the original bubbles or nucleating them.

关 键 词：Si颗粒 孔结构 热扩散系数 微晶玻璃 气泡成核 

分 类 号：TB321[一般工业技术—材料科学与工程]