无压机分球式高压装置用复合传压介质的制备研究  

Study & preparation of compound pressure transmitting medium for pressless split-sphere high pressure apparatus

作　　者：龙政鑫 郑剑锋[2] 李培培 谢尔盖獉维诺格拉多夫 曹大呼 

机构地区：[1]江苏西玉钻石科技有限公司,江苏常州213001 [2]常州大学,江苏常州213001 [3]金刚石技术有限公司,俄罗斯圣彼得堡197706

出　　处：《金刚石与磨料磨具工程》2017年第6期87-90,共4页Diamond & Abrasives Engineering

基　　金：科技部国际科技合作专项基金(2014DFR50200);江苏省国际科技合作专项基金(BZ2015029)

摘　　要：以无压机分球式高压装置(BARS)制备宝石级金刚石时,对传压介质的相对密度要求很高。为提高传压效率,实验研究ZrO_2–NaCl复合传压介质的制备,分析其相对密度同密封效果、倒角设计的关系,并通过NaCl复合提高ZrO_2的传压性能。发现复合介质的传压效率比叶蜡石更高,但只有在相对密度92%时才能保证设备安全、稳定工作,且需加装密封边。最后,在自制BARS设备上使用ZrO_2–NaCl传压介质合成出2ct、VS级的黄色宝石级人造金刚石单晶。When synthesizing gem-grade diamonds with pressless split-sphere high pressure apparatus(BARS),the requirements on relative density of pressure transmitting medium is pretty high.To enhance the efficiency of pressure transmitting,the preparation of a compound medium,ZrO_2–NaCl,is studied through experiments.The influence of relative density on sealing effect and chamfering is analyzed and the pressure transmitting ability is enhanced by compound ZrO_2 with NaCl.It is found that the compound medium has higher transmitting efficiency than pyrophyllites and that only when the relative density is 92%,the apparatus could work safe and stable.It also requires additional sealing edge.In the end,2-ct VS-level yellow gem-grade diamond single crystal is prepared on self-made BARS with ZrO_2–NaCl as pressure transmitting medium.

关 键 词：宝石级人造金刚石单晶 ZrO2–NaCl 相对密度 传压效率 

分 类 号：TB3[一般工业技术—材料科学与工程] TQ164[化学工程—高温制品工业]