Title:
METHOD FOR RECOVERING OXIDE SINGLE CRYSTAL MATERIAL
Document Type and Number:
Japanese Patent JPH05319994
Kind Code:
A
Abstract:
PURPOSE:To improve the recovery ratio by heating mixed powder of an oxide single crystal with impurities produced in working the oxide single crystal, passing the mixed powder through an electric field and applying the oxide single crystal powder to positive and negative electrodes. CONSTITUTION:Mixed powder 1 of an oxide single crystal such as LiTa2O3 or LiNb2O3 with impurities is fed to a powder feeding part 2 and dropped from the lower part at a constant velocity while being heated with a heater 3. Only the oxide single crystal powder (1a) in the mixed powder 1 is electrified by piezoelectric effects to attract the oxide single crystal powder (1a) to electrodes 4 in a high electric field at 100-500 V/cm with positive and negative electrodes 4 heated at 80-90 deg.C. The impurity powder (1b) is directly dropped and separated. The positive and negative electrodes 4 are moved in the direction of arrows with thin beltlike rollers 5 made of a metal to apply a high voltage to the respective earths. The attracted high-purity oxide single crystal powder (1a) is separated from the electrodes 4 with separators 6 and collected in containers 7.
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Inventors:
KANETANI YASUHIRO
IMOTO HIROKI
SASAKI KOJI
IMOTO HIROKI
SASAKI KOJI
Application Number:
JP12521692A
Publication Date:
December 03, 1993
Filing Date:
May 19, 1992
Export Citation:
Assignee:
DAISO CO LTD
International Classes:
B03C7/00; C30B29/30; (IPC1-7): C30B29/30; B03C7/00
Attorney, Agent or Firm:
Toru Kadota