خزش به سمت بال در رشد تک بلور از محلول ابر اشباع و راه پیشگیری آن

Single crys tals have been grown rrom ancient Egypt. Crys tal growth Slall ... u ... I •• ~ • • . 1 " - •• v •• , 1940 until now. Four melt.odS have been used to prepare single crys tal s: gr~-rr-onrsOlu tiOn, melt, vapour, and solid. Every metho~its own advantage, disadva nlagea nd problems. One of the problems in growth from solution is creeping up. Creeping up is undesirable growth or thin layer on the wall of crystal growth bath. Sometimes this layer grows very rapid and so fills the bath, and prevents growth . In this paper, these subjects are considered l. Why does creeping up occure? 2. What parameter affect on it? 3. What in the best way ror its prevention? Experi ments show that creeping up is arrected by wetting ang le between solution a nd bath wall, viscosity of solution, agitation, additives, and shape of bath.