Process for making homogeneous lithium niobate

Details Process for making homogeneous lithium niobate Process for making homogeneous lithium niobate

C - Chemistry, Metallurgy

30

B

148/1.5

C30B 29/30 (2006.01) C30B 15/00 (2006.01)

Patent

CA 1302848

- 17 - PROCESS FOR MAKING HOMOGENEOUS LITHIUM NIOBATE Abstract Lithium niobate crystals are made by pulling a crystal boule out of a melt of lithium niobate at high temperatures. Use of a congruent melt composition is highly advantageous because it yields uniform properties and composition throughout the crystalline boule. The generally accepted congruent melt composition is 48.6 mole percent lithium determined in 1971 from Curie temperature measurements. The invention is based on the discovery that the congruent melting composition is significantly different from that previously accepted and involves growth of lithium niobate crystals using this corrected congruent melting composition.

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