摘要
以金尾矿为主要原料,采用传统熔融法制备尾矿氟金云母微晶玻璃。利用DSC、XRD、SEM等检测手段,对尾矿氟金云母微晶玻璃的组织结构、电学性能、加工性能进行研究。实验结果表明:以Cr_2O_3为晶核剂,650℃核化2 h,860℃晶化3 h,可制备主晶相为KMg_3(Si_3AlO_(10))F_2的氟金云母微晶玻璃。随着Cr_2O_3含量增加,其晶体交错程度增大,径厚比达73。常温下,尾矿微晶玻璃体积电阻率达10^(12)Ω·m,而温度达到600℃时,尾矿微晶玻璃体积电阻率为10~6Ω·m;常温100 kHz时,尾矿微晶玻璃的介电常数为8.79～9.64,介电损耗为10^(-3)。随着Cr_2O_3含量增加,材料硬度逐渐下降后达到稳定,材料切削性能先增强,之后趋于稳定,基于材料硬度计算所得的切削性大于0.032。
Tailing fluorphlogopite(KMg3(Si3AlO10)F2)glass-ceramics were prepared by traditional melting method with gold tailing as main raw mate-rial.The microstructure,electrical properties and mechanical properties of the as-prepared glass-ceramics were investigated by DSC,XRD and SEM.The results revealed that the fuorophlogopite glass-ceramics with main crystalline phase of KMg 3(Si3AlO10)F 2 were prepared after nucleation at 650℃ for 2h and crystallization at 860℃ for 3h.With the increment of Cr2O3 content,the degree of crystal interlacing in the glass-ceramics improved and the aspect ratio reached 73.The tailings fluorophlogopite glass-ceramics exhibited the volume resistivity of 10^12Ω·m and 10^6Ω·m at room temperature and at 600℃,respectively.Under the condition of room temperature and 100 kHz,the dielectric constant of tai-lings fluorophlogopite glass-ceramics varied in the range of 8.79-9.64 and the dielectric loss was 10^-3.With the increment of Cr2O3 content,the hardness of the glass-ceramics dropped gradually and then maintained stable,while the mechanical properties of the glass-ceramics strengthened at first and then stayed almost unchanged.The mechanical properties calculated on the basis of hardness was more than 0.032.
作者
张雪峰
崔泽波
贾晓林
刘芳
ZHANG Xuefeng;CUI Zebo;JIA Xiaolin;LIU Fang(Inner Monglia University of Science and Technology,Baotou 014010;Engineering Center of Inner Monglia University of Science and Technology,Baotou 014010)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2019年第6期970-974,共5页
Materials Reports
基金
内蒙古自治区科技创新引导项目(2017CXYD-4)~~
关键词
尾矿
氟金云母微晶玻璃
切削性
电学性能
tailing
fluorphlogopite glass-ceramic
machinability
electrical properties
