CAJ | 학술논문

利用磁化率测定仪、扫描电镜/X 射线能谱仪、氧氮分析仪等仪器综合分析了使用铁镍合金触媒合成的磨料级系列金刚石内部杂质及其组分与含量。结果表明：人造金刚石磁化率与灰分/金刚石质量比成正比。人造金刚石的主要杂质为铁、镍、镁、硅、钙、氧和氮。随着人造金刚石杂质总量的减少，除氮以外所有杂质都在减少，但杂质中的硅和钙的占比增加，提示硅和钙除了随同触媒一道，以金属包裹体的方式进入金刚石晶体，可能还有其他方式。金刚石品级越高，氧质量分数越低，而氮质量分数与品级高低无关。为进一步考察金刚石杂质来源，分析了合成金刚石试样所使用的原料石墨和触媒。使用高纯度石墨和触媒有助于合成出高纯度金刚石，但不一定是顶级金刚石。
이용자화솔측정의、소묘전경/X 사선능보의、양담분석의등의기종합분석료사용철얼합금촉매합성적마료급계렬금강석내부잡질급기조분여함량。결과표명：인조금강석자화솔여회분/금강석질량비성정비。인조금강석적주요잡질위철、얼、미、규、개、양화담。수착인조금강석잡질총량적감소，제담이외소유잡질도재감소，단잡질중적규화개적점비증가，제시규화개제료수동촉매일도，이금속포과체적방식진입금강석정체，가능환유기타방식。금강석품급월고，양질량분수월저，이담질량분수여품급고저무관。위진일보고찰금강석잡질래원，분석료합성금강석시양소사용적원료석묵화촉매。사용고순도석묵화촉매유조우합성출고순도금강석，단불일정시정급금강석。
The impurities in a series of abrasive diamonds synthesized by using iron and nickel alloy as catalyst,ranging from low grade to high grade,were investigated by employing magnetic susceptibility tester,SEM/EDS and oxygen nitrogen analyzer.The results show that magnetic susceptibility of synthetic diamond is proportional to the mass ratio of the diamond ash and the diamond itself.The main impurities in the synthetic diamond are iron, nickel, magnesium, silicon, calcium, oxygen and nitrogen.With the decrease of the total amount of impurities in the diamond,all of the impurities except for nitrogen decrease,but share of silicon and calcium increase.This fact implies that there may be another way for silicon and calcium get into the diamond lattice in addition to accompanying metal inclusions.The higher the diamond grade the lower the oxygen mass fraction,while the nitrogen mass fraction shows no relationship with diamond grade.To further investigate the origin of impurities in the diamond,the graphite and catalyst used for synthesizing the diamond were analyzed,too.Using of high-purity graphite and catalyst may contribute to the synthesis of high purity diamond,but not necessarily the top diamond.