Systematic hardness studies on lithium niobate crystals

[摘要] In view of discrepancies in the available information on the hardness of lithium niobate, a systematic study of the hardness has been carried out. Measurements have been made on two pure lithium niobate crystals with different growth origins, and a Fe-doped sample. The problem of load variation of hardness is examined in detail. The true hardness of LiNbO₃ is found to be 630 ± 30 kg/mm². The Fe-doped crystal has a larger hardness of 750 ± 50 kg/mm².

[学科分类] 材料工程

[关键词] Microhardness;lithium niobate.