| Diamond has a series of excellent physical and chemical properties,for example: high hardness,high thermal conductivity,excellent chemical stability,excellent optical properties,etc.None property of any materials can be compared with these excellent properties.Due to the special crystal structure,diamond is the hardest mineral material founded in nature.So the diamond has a very wide application prospect,it is an ideal mineral material to promote the development of science and technology.However,not only the production of natural diamond is rare,the price is high,but also the quality is different,so the natural diamond can not meet needs,even severely hinder the development and utilization of diamond materials.Microwave Plasma Chemical Vapor Deposition is a method of prepare synthetizing diamond,relying on the MPCVD apparatus and under certain conditions of temperature and pressure.This method is recognized as the best method of synthetizing diamond.It has advantages of low production costs,not harsh experiment conditions,high deposition speed and high product quality.This article,through experiment,exploration,research,aims to summarize the influence factors of synthetizing MPCVD single crystal diamonds,researches the impact of the seed crystal on the MPCVD single crystal diamonds.Combined with the analysis of the experimental samples and literature,the law of the influence has been cognized.Different types of seed crystal can has impact on the crystallization quality of synthetic single crystal diamonds,but it has no impact on the growth rate.Different growth faces of seed crystal can has the impact on the crystallization quality,the growth rate,the aspect of growth step,the size of single crystal diamond,the final crystal face revealed and the aspect of growth face of synthetic single crystal diamonds.Meanwhile,the growth mechanism of different growth faces has been analyzed.At last,summarize the possible applications of the MPCVD single crystal diamonds in gemology and industrial filed. |
