Patent ID: 11898267
Assignee: FUJIAN INSTITUTE OF RESEARCH ON THE STRUCTURE OF MATTER, CHINESE ACADEMY OF SCIENCES
Field: Surface technology, coating (Chemistry)
Classification: CPC C  G | IPC C  G

Claim 7:
8. The method for growing the fluorine boron beryllium salt nonlinear optical crystal according to claim 1, comprising:
mixing and grinding BeO, NH4BF4, B2O3 and NH4F to form a mixture;
placing the mixture into a platinum tube, then sealing the platinum tube with oxyhydrogen flame;
placing the sealed platinum tube into a reactor, filling alumina powder outside the platinum tube; and
raising the temperature of the reactor to 650° C-800° C. in a resistance wire heating furnace, keeping the temperature constant for 10-15 days, then decreasing the temperature to 350-450° C. at a rate of 1-3° C. per hour, followed by decreasing the temperature to 40-60° C. at the rate of 5-10° C. per hour, stopping heating, cooling to 20-30° C., followed by washing, to obtain the nonlinear optical crystal.