传压介质对温度梯度法合成宝石级金刚石径高比的影响  

Effect of pressure medium on the diameter to height ratio of gem grade diamond synthesized by temperature gradient method

作　　者：田杨杨 刘坤 张坤 张建华 王涛 TIAN Yangyang;LIU Kun;ZhANG Kun;ZHANG Jianhua;WANG Tao(Zhengzhou Sino Crystal Co.,Ltd.,Zhengzhou 450001,Henan,China)

机构地区：[1]郑州华晶金刚石股份有限公司,河南郑州450001

出　　处：《超硬材料工程》2020年第3期17-20,共4页Superhard Material Engineering

摘　　要：利用六面顶压机,采用高温高压法,将FeCo30合金作为触媒,高纯石墨作为碳源,研究在一定温度梯度下,不同传压介质作为温度梯度法填充传压物质对合成宝石级金刚石径高比的影响。研究结果发现,高温烧结氧化铝陶瓷传压性能>二氧化锆>氧化镁>白云石。使用传压性能越好的传压介质,人工合成宝石级晶体的径高比越小。同时,高温烧结氧化铝陶瓷的传压性能受烧结温度的影响和压制密度的影响。相同的材质,随着烧结温度和压制密度的提升,传压性能会有较大的提升,但不是简单的线性关系。并且烧结温度和压制密度的提升到一定数值后,传压性能增加较少,人工合成晶体径高比降低较少。It was studied of the effect of the different mediums of transferring pressure on the diameter to height ratio of gem-class diamond,which was produced in a six surface press with a certain temperature gradient,thecatalyst of alloy of FeCo30,and the carbon source of high purity graphite.The results showed that the transferring pressure performance ofalumina ceramicssintered on high temperature was higher than the one of zirconia which the one of magnesia followed,and the one of dolomite was the weakest.Meanwhile,the pressure transmission performance of high temperature sintered alumina ceramics was affected by the sintering temperature and the compaction density.For the same material,with the increase of sintering temperature and compaction density,the pressure transmission performance wasupgraded efficiently,but it was not a simple linear relationship.When the sintering temperature and compaction density were increased to a certain point,the pressure transmission performance increased less and the ratio of diameter to height of gem-class diamond decreased less as well.

关 键 词：高温烧结 宝石级金刚石 氧化铝 氧化镁 传压性能 

分 类 号：TQ164[化学工程—高温制品工业]