Patent ID: 7544245

Claim:
A method for producing a barium titanium oxide single crystal piece with a given structure using a containerless solidification process, comprising the steps of: (a) preparing a material made of a barium titanium oxide; (b) controlling said material to be in a levitated state within a levitation furnace by means of hybrid aerodynamic-electrostatic levitation; (c) melting said levitated material using a laser; (d) solidifying said molten material while maintaining the levitated state; (e) after repeating said melting step (c) and said solidifying step (d) plural times, re-heating and re-melting said solidified material; (f) then maintaining said re-molten material in a given supercooling temperature range less than a inciting point of said material; (g) then gradually cooling said material at a rate of about 50 K/sec or less from the supercooled state; and (h) producing the barium titanium oxide crystal piece using the containerless solidification process.