硅酸盐熔体粘度理论计算模式的研究  

Study on Viscosity in Silicate Melts

作　　者：李如璧[1] 徐培苍[1] 

机构地区：[1]江苏技术师范学院应用材料研究所,江苏常州213001

出　　处：《江苏技术师范学院学报》2004年第4期33-37,共5页Journal of Jiangsu Teachers University of Technology

基　　金：国家自然科学基金资助项目(40203001)

摘　　要：对高温硅酸盐熔体粘度的估算一直是国际地学界热点问题之一。在研究高温硅酸盐熔体网络分数维值的基础上,建立了估算熔体粘度的新模式(简称FD模式);阐明了熔体粘度值除了与温度成反比外,还与分子网络的分数维值D相关,即与分子网络(纳米尺度以上)中的桥氧数Ni成正比(Ni=ri-D)、与单位硅氧四面体中的非桥氧数成反比。经对四个硅酸盐系列高温熔体的粘度测定证实,FD模式的理论计算值与实测值吻合,为探索岩浆迁移演化规律和完善新型低维材料的性能提供了新的理论依据。The prediction of viscosity in silicate melts remains one of the most challenging and elusive goals in Earth Sciences. In this paper, the FD model estimating viscosity of the high temperature silicate melts has been established on the basis of measuring fractal dimension values of the molecular network in the melts. This model illuminates the following points , 1. The melt′s viscosity is in direct proportion to temperature of the silicate melts. 2. The melt′s viscosity is in direct proportion to Ni (Bridge Oxygen Number of molecular network in melts for nanometer). 3. The melt′s viscosity is in inverse proportion to no-Bridge Oxygen Number in one Tetrahedron. The viscosity′ s measurement values of the three types silicate melts have been consistent with the calculated viscosity′s values by FD model. So that this FD model has great significance for deliberating magma transference and evolution rule and enhancing performance of low dimensional silicate materials.

关 键 词：高温硅酸盐熔体 网络分数维 粘度 计算模式 

分 类 号：O657.37[理学—分析化学] P578.94[理学—化学]