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특허 상세정보

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내보내기 페이스북 공유 카카오톡 공유

Dense polycrystalline silicon carbide

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) C04B-035/56    C04B-035/58   
미국특허분류(USC) 106/44
출원번호 US-0431611 (1974-01-08)
발명자 / 주소
  • Prochazka Svante (Ballston Lake NY)
출원인 / 주소
  • General Electric Company (Schenectady NY 02)
인용정보 피인용 횟수 : 61  인용 특허 : 0
초록

A dense silicon carbide material having improved electrically conducting properties is disclosed which is prepared by forming a homogeneous dispersion of silicon carbide, a sufficient amount of a boron containing additive, and 3.5-10.0% by weight of silicon nitride and hot pressing the dispersion at a sufficient temperature and pressure whereby a dense substantially nonporous ceramic is formed. The silicon carbide material can be machined by electrical discharge machining or by electrochemical machining.

대표
청구항
▼

A dense hot pressed electrically conducting silicon carbide ceramic body consisting essentially of silicon carbide, a boron additive selected from the group consisting of boron and boron carbide wherein the amount of the boron additive is equivalent to 0.3-3.0% by weight of boron, and sufficient nitrogen atoms accommodated in the lattice of said silicon carbide making said body electrically conducting with a room temperature resistivity ranging up to about 50 ohm centimeters, said boron additive being in solid solution with the silicon carbide, said cera...

이 특허를 인용한 특허 (61)

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  21. Coppella Steven J. ; Thorwart Laurence J. ; Pfaff Mark E. ; Erich David A., Carbon-graphite/silicon carbide composite article.
  22. Friederich Kilian (Plochingen DEX) Rogowski Dirk (Bnzwangen DEX), Combination of two sliding or sealing elements and a method for producing the same.
  23. Okuo Takayasu (Ibaragi JPX) Masaki Takaki (Ohtsu JPX) Kobayashi Keisuke (Ohtsu JPX), Composite electrode and insulating wall elements for magnetohydrodynamic power generating channels characterized by fibe.
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  33. Boylan, Joseph, Hard non-oxide or oxide ceramic / hard non-oxide or oxide ceramic composite hybrid article.
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  35. Washburn Malcolm E. (Princeton MA), High strength nitride bonded silicon carbide refractories.
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  61. Levoy, Nancy P.; Cortellini, Edmund A.; Jorge, Eric, Volume-change resistant silicon oxy-nitride or silicon oxy-nitride and silicon nitride bonded silicon carbide refractory.

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