METHOD FOR GROWTH OF SAPPHIRE SINGLE CRYSTALS GROWTH,申请号RU20070110192-传众专利搜索

METHOD FOR GROWTH OF SAPPHIRE SINGLE CRYSTALS GROWTH

申请公布号：RU2355830(C2)

申请号：RU20070110192

申请日期：2007.03.20

申请公布日期：2009.05.20

申请人：

GOSUDARSTVENNOE OBRAZOVATEL'NOE UCHREZHDENIE VYSSHEGO PROFESSIONAL'NOGO OBRAZOVANIJA SEVERO-KAVKAZSKIJ GOSUDARSTVENNYJ TEKHNICHESKIJ UNIVERSITET

发明人：SINEL'NIKOV BORIS MIKHAJLOVICH;IGNATOV ALEKSANDR JUR'EVICH;MOSKALENKO SERGEJ VIKTOROVICH

分类号：C30B15/00;C30B15/20;C30B29/20

主分类号：C30B15/00

摘要：FIELD: technological processes. ^ SUBSTANCE: invention is related to the field of sapphire single crystals growth and may be used in optical, chemical and electronic industry. Method includes vacuum melting of initial charge in chamber, single crystal pulling to seeding agent with its growth at simultaneous cooling of melt and further cooling of grown single crystal. Prior to beginning of single crystal growth additionally links are grown, at that height of links corresponds to height of observed melt meniscus and is equal to 0.5-4.0 mm, and time of their growth makes 1-20 minutes, at that crystallisation process is controlled by means of heater power reduction and provision of specified linear speed of crystallisation, and cooling of single crystal is done in vacuum for 30-35 hours with further delay for 10-12 hours in argon atmosphere at the pressure of 0.5 kgf/cm2 in chamber, opening of chamber cover and single crystal unloading. ^ EFFECT: large single crystals of sapphire with high structural perfection; increased service life of device due to control and limitation of melt superheating temperature, control of hardening beginning temperature and crystallisation speed. ^ 4 ex