Title:
SYNTHESIS METHOD OF SILICON CARBIDE WHISKERS USING SETAE OF RICE HULLS
Document Type and Number:
WIPO Patent Application WO/2011/152577
Kind Code:
A1
Abstract:
The present invention relates to a synthesis method of silicon carbide whiskers using setae of rice hulls, comprising: the mixing step of preparing material for synthesis by using the setae or mixing the setae and a carbon compound; the first heat treatment step of heating the material for synthesis at 200-1,000 ℃ for 2-24 hours; the impurities removing step of heating the first heat-treated material at 1,000-1,200 ℃ for 30 minutes to 3 hours to remove first impurities; the first synthesis step of heating the impurities-removed material at 1,200-1,500 ℃ for 5 minutes to 3 hours to generate a nucleus of silicon carbide whiskers; and the second synthesis step of heating the material passing through the first synthesis step at 1,550-2,000 ℃ for 5 minutes to 10 hours to grow the nucleus of silicon carbide whiskers, thereby preparing the silicon carbide whiskers. According to the present invention, whiskers are prepared by using setae instead of conventional rice hulls or carrying out synthesis with the setae and a carbon compound under optimum conditions, thereby improving a production yield of silicon carbide whiskers by three times or more compared with the conventional case, enhancing economical efficiency due to cheap material costs, and improving the quality of the prepared silicon carbide whiskers.
Inventors:
LEE, Young-Jo (1 Hyundai Apt, Moonjung-dong Songpa-gu, Seoul 138-200, 138-200, KR)
이영조 (서울시 송파구 문정동 현대1차 APT, 138-200 Seoul, 138-200, KR)
KIM, Jin-Young (103-101, Hyosungtown Bongduk-2dong, Nam-gu, Daegu 705-022, 705-022, KR)
김진영 (대구시 남구 봉덕2동 효성타운 103동 101호, 705-022 Daegu, 705-022, KR)
CHUNG, Yong-Ho (1 Lottecastle lake Apt, Dowon-dong Dalseo-gu, Daegu 704-380, 704-380, KR)
이영조 (서울시 송파구 문정동 현대1차 APT, 138-200 Seoul, 138-200, KR)
KIM, Jin-Young (103-101, Hyosungtown Bongduk-2dong, Nam-gu, Daegu 705-022, 705-022, KR)
김진영 (대구시 남구 봉덕2동 효성타운 103동 101호, 705-022 Daegu, 705-022, KR)
CHUNG, Yong-Ho (1 Lottecastle lake Apt, Dowon-dong Dalseo-gu, Daegu 704-380, 704-380, KR)
Application Number:
KR2010/003535
Publication Date:
December 08, 2011
Filing Date:
June 01, 2010
Export Citation:
Assignee:
SSANGYONG MATERIALS CORPORATION (1-85 Woram-dong, Dalseo-gu, Daegu 704-320, 704-320, KR)
쌍용머티리얼 주식회사 (대구광역시 달서구 월암동 1-85, 704-320 Daegu, 704-320, KR)
LEE, Young-Jo (1 Hyundai Apt, Moonjung-dong Songpa-gu, Seoul 138-200, 138-200, KR)
이영조 (서울시 송파구 문정동 현대1차 APT, 138-200 Seoul, 138-200, KR)
KIM, Jin-Young (103-101, Hyosungtown Bongduk-2dong, Nam-gu, Daegu 705-022, 705-022, KR)
김진영 (대구시 남구 봉덕2동 효성타운 103동 101호, 705-022 Daegu, 705-022, KR)
쌍용머티리얼 주식회사 (대구광역시 달서구 월암동 1-85, 704-320 Daegu, 704-320, KR)
LEE, Young-Jo (1 Hyundai Apt, Moonjung-dong Songpa-gu, Seoul 138-200, 138-200, KR)
이영조 (서울시 송파구 문정동 현대1차 APT, 138-200 Seoul, 138-200, KR)
KIM, Jin-Young (103-101, Hyosungtown Bongduk-2dong, Nam-gu, Daegu 705-022, 705-022, KR)
김진영 (대구시 남구 봉덕2동 효성타운 103동 101호, 705-022 Daegu, 705-022, KR)
International Classes:
C01B31/36; B09B3/00; C09C1/28; C09C3/04
Attorney, Agent or Firm:
CHO, Young Hyun (3F Focus Building, 725-25 Yeoksam-dong,Gangnam-gu, Seoul 135-080, 135-080, KR)
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