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:
Apr. 12, 2016
Filed:
May. 31, 2013
Applicant:
Beihang University, Beijing, CN;
Inventors:
Assignee:
BEIHANG UNIVERSITY, Beijing, CN;
Primary Examiner:
Int. Cl.
CPC ...
B22C 9/10 (2006.01); C04B 35/057 (2006.01); C04B 35/628 (2006.01); B22C 1/00 (2006.01); B22C 1/22 (2006.01); B22D 21/02 (2006.01); C04B 35/622 (2006.01); C04B 35/634 (2006.01);
U.S. Cl.
CPC ...
B22C 9/10 (2013.01); B22C 1/00 (2013.01); B22C 1/22 (2013.01); B22D 21/022 (2013.01); C04B 35/057 (2013.01); C04B 35/622 (2013.01); C04B 35/62815 (2013.01); C04B 35/634 (2013.01); C04B 2235/3224 (2013.01); C04B 2235/3225 (2013.01); C04B 2235/3244 (2013.01);
Abstract
This invention publishes a method to prepare CaO-based ceramic cores used in investment casting applications. This method claims to use the rare earth oxide to coat the CaO core surface; later the coated cores are shaped then sintered to get the final products. CaO based core was made by 5˜15 wt % plasticizer, 0.001˜20 wt % mineralizer and the rare earth-coated CaO powders to balance for total 100%. This preparation method can solve the CaO core water absorption problems during core manufacturing, shipping and storage process while improve the core chemical inertness and mechanical properties.