我厂外延抛光,原用氧化镁机械抛光,每次需八小时。参照外地经验,改用重铬酸铵与三氧化二铬化学抛光,缩短为三小时。学习优选方法后,希望通过抛光液配比的调整,再提高功效。抛光液由去离子水、重铬酸铵和三氧化二铬组成,加上抛光时间,是个三因素问题。采用“从好点出发”的办法处理。先优选作用最大的重铬酸铵的用量,固定水为1000克,三氧化 I plant extension polishing, the original magnesium oxide mechanical polishing, each need eight hours. Reference to foreign experience, switch to ammonium bichromate and chromium oxide chemical polishing, shortened to three hours. After learning the preferred method, I hope through the polishing liquid ratio adjustment, and then improve efficiency. The polishing solution consists of deionized water, ammonium bichromate and chromium oxide plus polishing time, a three-factor problem. Adopting the “starting from a good point” approach. The first choice of the role of the largest amount of ammonium bichromate, fixed water to 1000 grams, three oxidation