Production of lithium tantalate single crystal

Abstract

Abstract PURPOSE: To obtain a high quality LiTaO 3 single crystal in a high yield by growing a single crystal in an atmosphere of inert gas mixed with a little oxygen using a platinum-rhodium alloy crucible to reduce formation of cracks. CONSTITUTION: A LiTaO 3 sintered body is placed in a platinum-rhodium alloy crucible and heat-melted in an atmosphere of N 2 gas mixed with 0.2W10% O 2 . By rotating a LiTaO 3 chip crystal a LiTaO 3 single crystal is pulled from the melt. Formation of cracks can considerably be reduced as compared to the case of growth in a N 2 gas atmosphere, and by raising the yield the production cost can be reduced. COPYRIGHT: (C)1980,JPO&Japio

Inventors

• 👤 Yukinori Kuwano
• 👤 Michitoshi Onishi
• 👤 Toshiaki Yokoo

Bibliographic Details