Journal of Inorganic Materials ›› 2023, Vol. 38 ›› Issue (3): 363-364.DOI: 10.15541/jim20224000

• SCI. & TECH. PROGRESS • Previous Articles    

An Important Breakthrough in the Technology of Sapphire Plate with Large Size Grown by the Edge-defined Film-fed Growth Method

WANG Donghai1(), LI Dongzhen1(), XU Jun2()   

  1. 1. Nanjing Tongli Crystal Material Institute Co., Ltd, Nanjing 211211, China
    2. Shanghai Engineering Research Center for Sapphire Crystal, Tongji University, Shanghai 200092, China

Abstract:

Sapphire possesses excellent hardness, strength, and UV-IR transmittance properties, which make it as an excellent candidate for IR window and transparent armor material. Sapphire plate with large size grown by the Edge-defined Film-fed Growth (EFG) method appears “near-net” size, which can minimize processing cost. Recently Nanjing Tongli Crystal Material Institute Co., Ltd. has accomplished large size sapphire plate successfully by EFG method, with size up to 415 mm × 810 mm × 12 mm.

Key words: edge-defined film-fed growth method, sapphire plate, transparent armor

CLC Number: