The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 13, 2010
Filed:
Apr. 11, 2006
Xiaolong Du, Beijing, CN;
Zhaoquan Zeng, Beijing, CN;
Hongtao Yuan, Beijing, CN;
Handong LI, Beijing, CN;
Qikun Xue, Beijing, CN;
Jinfeng Jia, Beijing, CN;
Xiaolong Du, Beijing, CN;
Zhaoquan Zeng, Beijing, CN;
Hongtao Yuan, Beijing, CN;
Handong Li, Beijing, CN;
Qikun Xue, Beijing, CN;
Jinfeng Jia, Beijing, CN;
The Chinese Academy of Sciences Institute of Physics, Beijing, CN;
Abstract
The present invention concerns a high vacuum in-situ refining method for high-purity and superhigh-purity materials and the apparatus thereof, characterized in heating the upper part and lower part of crucible separately using double-heating-wires diffusion furnace under vacuum, thereby forming the temperature profile which is high at upper part and low at lower part of crucible, or in reverse during different stages; then heating the crucible in two steps to remove impurities with high saturation vapor pressure and low saturation vapor pressure respectively in efficiency; and obtaining high-purity materials eventually. The whole procedure is isolated from atmosphere, reducing contamination upon stuff remarkably. The present invention could provide products with high-quality and high production capacity, which are stable in performance, therefore is reliable and free from contamination. The present invention is appropriate for manufacture of high-purity and superhigh-purity materials, particularly for manufacture of high-activity high-purity materials.