Title:
METHOD FOR SYNTHESIZING SILICON CARBIDE POWDER
Document Type and Number:
WIPO Patent Application WO/2023/167387
Kind Code:
A1
Abstract:
The present invention relates to a method for synthesizing silicon carbide powder, the method comprising: a step for preparing mixed powder by mixing silica (SiO2) powder and carbon (C) powder at a constant ratio; a step for coating the inner wall of a crucible with silicon carbide (SiC) powder by adding the prepared mixed powder into the crucible and heat-treating same at a synthesis temperature of 1550-1900 ℃; a step for, after cooling the crucible having undergone the coating step, removing the synthesized silicon carbide powder and unreacted mixed powder from the inside of the crucible; a step for re-preparing mixed powder by mixing silica (SiO2) powder and carbon (C) powder at a constant ratio; and a step for synthesizing silicon carbide powder by adding the re-prepared mixed powder into the crucible with silicon carbide powder coated on the inner wall and heat-treating same at a synthesis temperature of 1850-2350 ℃. According to the invention as described above, as synthesis is performed using the crucible with silicon carbide powder uniformly coated on the inner wall, the yield of synthesized silicon carbide powder may be improved. Also, in the synthesis process of the present invention, the particle size distribution of silicon carbide powder is narrowed by appropriately adjusting a temperature variation between the upper and lower parts of the crucible, and accordingly, the average particle size of silicon carbide powder can be easily controlled.
Inventors:
SEO TAEIL (KR)
CHOI GYUCHAE (KR)
KIM DONGHUN (KR)
LEE GAHYOUNG (KR)
JUN GUSIK (KR)
SEO MINHYUCK (KR)
CHOI GYUCHAE (KR)
KIM DONGHUN (KR)
LEE GAHYOUNG (KR)
JUN GUSIK (KR)
SEO MINHYUCK (KR)
Application Number:
PCT/KR2022/017961
Publication Date:
September 07, 2023
Filing Date:
November 15, 2022
Export Citation:
Assignee:
STI CO LTD (KR)
International Classes:
C01B32/956; C01B32/97
Foreign References:
| KR20080051144A | 2008-06-10 | |||
| KR20210072455A | 2021-06-17 | |||
| KR20110003012A | 2011-01-11 | |||
| KR20140068494A | 2014-06-09 | |||
| KR20130104447A | 2013-09-25 | |||
| KR20140049664A | 2014-04-28 | |||
| KR20210066523A | 2021-06-07 | |||
| JP2011102205A | 2011-05-26 | |||
| KR20070066941A | 2007-06-27 | |||
| KR102407043B1 | 2022-06-10 |
Attorney, Agent or Firm:
HAEDAM INT'L PATENT & LAW FIRM (KR)
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