Title: Growth method of urea long-rod crystallon
Application Number: 89102130 Application Date: 1989.04.05
Publication Number: 1046199 Publication Date: 1990.10.17
Approval Pub. Date: Granted Pub. Date: 1993.02.03
International Classifi-cation: C30B7/08,C30B29/54
Applicant(s) Name: Fujian Inst. of Matter Structure, Chinese Academy Address: 350002
Inventor(s) Name:
Attorney & Agent:
Abstract:
     The present invention relates to a growth method of urea long-rod crystal seed. It uses the solution cooling method and adds the ethanolamine in the urea methanol saturated solution so as to raise the growth speed of urea single crystal in the (001) direction and restrain the expanding growth of (110) column surface, thereby the long-rod crystal seed whose growth speed in the (001) direction is about 4 mm a day and length is more than 185mm is obtained.
Time: 8