传压介质叶蜡石的热稳定性研究  

Thermal Stability of Pressure Transmission Medium Pyrophylit

作　　者：王征 张子龙 汪俊博 刘雪坤 李海宁 程学瑞 WANG Zheng;ZHANG Zilong;WANG Junbo;LIU Xuekun;LI Haining;CHENG Xuerui(School of Electronics and Information,Zhengzhou University of Light Industry,Zhengzhou 450002,China)

机构地区：[1]郑州轻工业大学电子信息学院,河南郑州450002

出　　处：《超硬材料工程》2024年第6期45-50,共6页Superhard Material Engineering

基　　金：中国博士后基金面上项目(2022M721301);河南省博士后科研项目(202103102);河南省科技项目(232102231057)。

摘　　要：在高温高压合成金刚石的过程中,叶蜡石作为密封传压介质是必不可少的辅助材料。近年来,超硬材料行业快速发展,对叶蜡石的需求量很大,且叶蜡石开采带来了严重的环境问题。因此,急需对传压介质叶蜡石进行深入研究,构筑叶蜡石结构―物性之间的关联,进而探寻新的密封传压介质材料。采用SEM对北京门头沟叶蜡石原矿与南非叶蜡石原矿进行了形貌表征,并通过EDS对两种矿物进行成分分析。此外,利用XRD和TG分析北京与南非叶蜡石原矿的热稳定性,研究了两种样品在400℃、600℃、850℃和1100℃的物相组成,进而获得其高温条件下的结构演化过程。结果表明,北京门头沟叶蜡石和南非叶蜡石在元素成分、矿物组成及其热稳定性等方面均存在差异,也是其传压性能差异的根本原因。Pyrophyllite,as a pressure transmitting medium,is one essential auxiliary material in the process of high temperature and high pressure diamond synthesis.With the rapid development of super hard material industry,more and more pyrophyllite are needed for diamond synthesis,which induce serious environmental pollution.Therefore,it is urgent to systematically study the pressure transmitting medium for pyrophyllite,constructing the structure-physical relation and then exploring new pressure transmitting medium materials.The thermal stability of Beijing Mentougou pyrophyllite and South Africa pyrophyllite was studied.First,the morphologies of both types pyrophyllite were characterized by SEM,and their components were analyzed by EDS technology.In addition,thermal stability was analyzed using XRD and TG.The structural evolution were obtained for two types pyrophyllite during annealing at 400℃,600℃,850℃and 1100℃,respectively.The results show that there are differences in elemental composition,mineral composition and thermal stability between Beijing Mentougou pyrophyllite and South Africa pyrophyllite,which may be the fundamental reason for their different pressure transfer performance.

关 键 词：叶蜡石 热稳定性 传压介质 热重分析 金刚石 

分 类 号：TG146[一般工业技术—材料科学与工程]