摘要
以固体废弃物磷石膏为原料,在传统常压醇水热法的基础上添加CaSO_(4)·2H_(2)O为晶种制备半水硫酸钙晶须。采用单因素试验法探究了晶种含量、丙三醇含量和磷石膏质量分数对晶须结构和形貌的影响,确定晶须的最佳制备工艺条件。采用SEM和XRD对样品进行表征分析,实验结果表明:添加CaSO_(4)·2H_(2)O晶种制备晶须的长径比(49.29)比只添加丙三醇的样品的长径比(30.99)提高了近60%;当丙三醇与水的体积比(V)为1、晶种含量为1%、磷石膏质量分数为5%时制备的晶须的平均直径为0.65μm,长径比达到了62.15,晶须的尺寸均匀。这说明添加1%CaSO_(4)·2H_(2)O晶种、V为1的丙三醇和质量分数为5%的磷石膏在常压下能制备出高长径比和尺寸均匀的半水硫酸钙晶须。
Hemihydrate calcium sulfate whiske were prepared from phosphogypsum,which is phosphate mining enterprises produce waste slag,by raditional normal pressure alcohol hydrothermal method adding CaSO_(4)·2H_(2)O as crystal seed.In order to find the optimum preparation conditions,the effects of seed content,glycerol content and phosphogypsum mass fraction on the structure and morphology of whiskers were investigated by single factor test.These samples were characterized by SEM and XRD.The results show that the aspect ratio of the whisker prepared with CaSO_(4)·2H_(2)O crystal seed(49.29)is 30.99,which is about 60%higher than that prepared with glycerol.When the volume ratio(V)of glycerol to water is 1,the content of seed is 1%,and the mass fraction of phosphogypsum is 5%,the average diameter of prepared whiskers is 0.65μm,the aspect ratio is 62.15,and the size of whiskers is uniform.These results indicate that hemihydrate calcium sulfate whisker with high aspect ratio and uniform size can be prepared by adding 1%CaSO_(4)·2H_(2)O seed,glycerol with V of 1 and phosphogypsum with mass fraction of 5%under atmospheric pressure.
作者
杨红艳
欧阳俊瑶
夏蝶
顾雪梅
杨姗
王伟
YANG Hongyan;OUYANG Junyao;XIA Die;GU Xuemei;YANG Shan;WANG Wei(College of Chemical Engineering,Guizhou University of Engineering Science,Bijie 551700,China)
出处
《人工晶体学报》
CAS
北大核心
2022年第2期309-315,共7页
Journal of Synthetic Crystals
基金
贵州省教育厅青年科技人才成长项目(黔教合KY字[2017]299)
贵州省普通高等学校青年科技人才成长项目(黔教合KY字[2020]159)
大学生创新创业项目(201910668021)
大学生创新创业项目(202110668031)。
关键词
磷石膏
半水硫酸钙晶须
丙三醇
水热法
晶种
长径比
工艺参数
phosphogypsum
hemihydrate calcium sulfate whisker
glycerol
hydrothermal method
crystal seed
aspect ratio
technological parameter
