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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.:

US 11241740 B1

PDFFull Text
Date of Patent:
Feb. 08, 2022

Filed:

May. 21, 2018

Method for preparing high-melting-point metal powder through multi-stage deep reduction

Applicant:

Northeastern University, Shenyang, CN;

Inventors:

Ting An Zhang, Shenyang, CN;

Zhihe Dou, Shenyang, CN;

Yan Liu, Shenyang, CN;

Zimu Zhang, Shenyang, CN;

Guozhi Lv, Shenyang, CN;

Qiuyue Zhao, Shenyang, CN;

Liping Niu, Shenyang, CN;

Daxue Fu, Shenyang, CN;

Weiguang Zhang, Shenyang, CN;

Assignee:

NORTHEASTERN UNIVERSITY, Shenyang, CN;

Attorney:

Muncy, Geissler, Olds & Lowe, P.C.

Primary Examiner:

Brian D Walck

Assistant Examiner:

Danielle Carda

Int. Cl.
CPC ...
B22F 9/24 (2006.01); C22B 34/00 (2006.01);
U.S. Cl.
CPC ...
B22F 9/24 (2013.01); C22B 34/00 (2013.01); B22F 2301/20 (2013.01);
Abstract

The invention relates to a method for preparing high-melting-point metal powder through multi-stage deep reduction, and belongs to the technical field of preparation of powder. The method includes the following steps of mixing dried high-melting-point metal oxide powder with magnesium powder and performing a self-propagating reaction, placing an intermediate product into a closed reaction kettle, leaching the intermediate product with hydrochloric acid as a leaching solution so as to obtain a low-valence oxide MeO precursor of the low-valence high-melting-point metal; uniformly mixing the precursor with calcium powder, pressing the mixture, placing the pressed mixture into a vacuum reduction furnace, heating the vacuum reduction furnace to 700-1200° C., performing deep reduction for 1-6 h, leaching a deep reduction product with hydrochloric acid as a leaching solution and performing treatment, so as to obtain the high-melting-point metal powder.

Find Patent Forward Citations

Zhang, Ting. (2022). Method for preparing high-melting-point metal powder through multi-stage deep reduction (U.S. Patent No. 11241740). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11241740

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