摘要
利用水热法合成出数粒块状红宝石晶体,其颜色为略带玫瑰的鲜红色,最大尺寸为50mm×17mm×15mm。籽晶切向以(224^-3)为主、以Cr2O3为致色主要化合物。水热红宝石的晶体结构、化学成分及其它宝石学特点均同天红宝石相似,但水热法合成红宝石Cr2O3含量明显偏低于天然红宝石。此外V2O5的含量也较低。红宝石的水热生长试验在密封贵金属衬管中进行。使用自行设计制造的反应腔尺寸为Φ38mm×700mm的高压釜及温差井式电阻炉;釜内温度500℃~600℃,晶体生长区(低温区)与溶解区(高温区)的温差30℃~80℃;釜内压力1500atm~2000atm;釜内开孔档板使用贵金属,开孔率5%~25%。介质溶液为钾钠的复杂碱性混合溶液,并掺入一定量的矿化离子(矿化剂)。
Synthetic ruby crystals with pinkish red color are produced by hydrothermal method. The maximum size of crystals with seed slice cut in the direction of n (2243 ) are 50 mm×17 mm×15 mm. Chromium oxide is dominant color causing compound. Crystal structure, chemical composition and other gemological properties of hydrothermal rubies are similar to that of natural rubies, Cr 2O 3 percentage is clearly lower than that of natural rubies as for the V 2O 5 is a little lower than the natural one′s.An experiment on hydrothermal growth are in process in a sealed tube with a precious metal liner.In a self made reaction chamber,an autoclave with a size 38 mm×700 mm and a thermal resister furnace.The temperature range in the autoclave is 500℃ to 600℃,the temperature difference between crystal growth zone(Low temperature zone) and dissolving zone (High temperature zone) is 30℃ to 80℃,Pressure ranges from 1 500 atm to 2000 atm,in the autoclave a precious metal porous baffle with a porosity of 5% to 25%.The medium solution is a complex alkaline solution of sodium carbonates and potassium carbonates containing some necessary mineralizing ions.
出处
《广西科学》
CAS
2000年第4期286-288,共3页
Guangxi Sciences
基金
科技部专题研究项目(编号:96-920-15-02)
关键词
红宝石
水热法
人工合成
ruby
hydrothermal method
synthesis