Method of producing lithium tantalate crystal

Details Method of producing lithium tantalate crystal Method of producing lithium tantalate crystal

2008-01-29

2008-01-29

Hiteshew, Felisa (Department: 1722)

Single-crystal, oriented-crystal, and epitaxy growth processes;

Forming from vapor or gaseous state

With a step of measuring, testing, or sensing

C117S951000, C117S952000, C423S062000

Reexamination Certificate

active

10548098

ABSTRACT:
A method of producing a lithium-tantalate crystal, wherein at least a first material containing lithium tantalate, lithium niobate or hydrogen storage alloy storing hydrogen that is subjected to a heat treatment at a temperature of T1′ that is Curie temperature or higher in a reducing atmosphere is superposed on a single-polarized lithium-tantalate crystal, and then the crystal is subjected to a heat treatment at a temperature of T2′ that is lower than Curie temperature in a reducing atmosphere, thereby an electric conductivity of the single-polarized lithium-tantalate crystal is increased. There can be provided a method of producing a lithium-tantalate crystal wherein the surface charge generated by applying a temperature change to the lithium-tantalate crystal can be decayed quickly without accumulating by increasing the electric conductivity, and an effective piezoelectric property is exhibited by maintaining the single polarized structure.

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