Growth,quality inspection and ultrasonic vibration cutting of large size sapphire grown by SAPMAC method

Abstract:

In this paper,the technology of large size sapphire grown by SAPMAC method is elaborated and the quality of the obtained crystal has been inspected and analyzed.Results indicate that the crystal structure is complete and the FHWM value is only 11 arcsec.The defect concentration is in the 10 2 /cm 2 level,the purity is higher than 99.995%,and the transmission in 3-5μm band is greater than 85%.Ultrasonic vibration machining is used to process the large size sapphire and a special grinding composite cutting tool is designed to improve its efficiency.