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:
Feb. 22, 2011
Filed:
Jun. 21, 2006
Kiyomi Ema, Toyama, JP;
Yutaka Ohmori, Sodegaura, JP;
Hirokazu Kato, Sodegaura, JP;
Kenji Yamaguchi, Sodegaura, JP;
Kiyomi Ema, Toyama, JP;
Yutaka Ohmori, Sodegaura, JP;
Hirokazu Kato, Sodegaura, JP;
Kenji Yamaguchi, Sodegaura, JP;
Nissan Chemical Industries, Ltd., Tokyo, JP;
Abstract
A manufacturing method for a slurry for the production of a precision casting mold that includes a zirconia sol and a refractory powder, and a manufacturing method for a precision casting mold that uses the slurry is provided. The present invention relates to a manufacturing method for a slurry for the production of a precision casting mold for a metal that includes a step in which an alkaline zirconia sol (A1) and a refractory powder (D) are mixed, the alkaline zirconia sol (A1) being obtained by a manufacturing method that includes a step (i), in which a zirconium salt (B1) is heated at 60 to 110° C. in an aqueous medium that includes a carbonate of quaternary ammonium, and a step (ii), in which a hydrothermal treatment is carried out at 100 to 250° C. In addition, the present invention relates to a manufacturing method for a slurry for the production of a precision casting mold for a metal that includes a step in which an acidic zirconia sol (C3) and a refractory powder (D) are mixed, the acidic zirconia sol (C3) being obtained by a manufacturing method that includes a step (I), in which an alkaline zirconia sol (A3) and a zirconium salt (B3) are mixed, and a step II, in which the obtained liquid mixture is caused to react at 80 to 250° C.