한국결정성장학회지 (Journal of the Korean Crystal Growth and Crystal Technology)

  • 제20권4호
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  • Pages.178-184
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  • 2010
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  • 1225-1429(pISSN)
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  • 2234-5078(eISSN)
한국결정성장학회 (The Korea Association of Crystal Growth)
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열 화학적 환원 처리를 이용한 절연체 12CaO·7Al2O3의 전도체로의 전환

Transition of 12CaO·7Al2O3 electrical insulator to the permanent semiconductor using via thermo-chemical reduction treatment

  • 정준호 (한양대학교 신소재공학부) ;
  • 은종원 (한양대학교 신소재공학부) ;
  • 오동근 (한양대학교 신소재공학부) ;
  • 김광진 (한국세라믹기술원 기업협력센터) ;
  • 홍태의 (한국세라믹기술원 기업협력센터) ;
  • 정성민 (한국세라믹기술원 기업협력센터) ;
  • 최봉근 (한양대학교 신소재공학부) ;
  • 심광보 (한양대학교 신소재공학부)
  • Chung, Jun-Ho (Division of Advanced Materials Science Engineering, Hanyang Univ.) ;
  • Eun, Jong-Won (Division of Advanced Materials Science Engineering, Hanyang Univ.) ;
  • Oh, Dong-Keun (Division of Advanced Materials Science Engineering, Hanyang Univ.) ;
  • Kim, Kwang-Jin (KICET Business Support Division (Korea Institute of Ceramic Engineering & Technology)) ;
  • Hong, Tae-Ui (KICET Business Support Division (Korea Institute of Ceramic Engineering & Technology)) ;
  • Jeong, Seong-Min (KICET Business Support Division (Korea Institute of Ceramic Engineering & Technology)) ;
  • Choe, Bong-Geun (Division of Advanced Materials Science Engineering, Hanyang Univ.) ;
  • Shim, Kwang-Bo (Division of Advanced Materials Science Engineering, Hanyang Univ.)
  • 투고 : 2010.07.30
  • 심사 : 2010.08.16
  • 발행 : 2010.08.31
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초록

마이크로 웨이브 연소합성법(microwave-assistant combustion method)를 이용하여 $12CaO{\cdot}7Al_2O_3$(C12A7) 분말을 성공적으로 제작하였고, $H_2$ 가스 분위기에서의 후열처리를 통하여 C12A7:H 제작에 성공하였다. 분말의 합성 여부 와 결정성 확인 및 분말 하소 시 온도에 따른 반응 분석을 위하여 X-ray diffraction(XRD) 및 TG-DSC 분석을 시행하였다. 또한, 후 열처리 후 C12A7 cage 내부의 자유산소 이온이 수소 이온으로 치환되었는지 확인하기 위하여 TG-MS 분석을 시행하였고, $289.5^{\circ}C$에서 H와 $H_2$ 가스가 방출되는 것이 확인되었으므로, H 이온이 cage 내부로 치환된 것을 확인시켜준다. 성공적으로 치환된 C12A7:H 를 홀 측정기(Hall measurement)를 이용하여 전도성을 측정하여 본 결과 $1000^{\circ}C$, Ar/H=8:2의 분위기에서 8h 이상 처리된 C12A7:H의 경우 상온(300 K)에서 $10^2{\Omega}{\cdot}cm$의 비저항 값을 나타내었다.

The $12CaO{\cdot}7Al_2O_3$(C12A7) powders were successfully synthesized using combustion method with microwave-assistant and C12A7:H were fabricated by post-annealed process in Ar/H atmosphere. X-ray diffraction patterns and TGDSC were used for investigating to the precursors of crystalline and reaction depending on temperature. C12A7:H that was treated post-annealed process were investigated TG-MS and Hall-measurement for confirming H ions doping and checking electrical resistivity of C12A7:H. H ion substituted to $O^{2-}$ ions in the C12A7 cages were confirmed at $289.5^{\circ}C$ by TG-MS and C12A7:H calcined at $1000^{\circ}C$ in Ar/H=8:2 atmosphere for 8~10 h has low electrical resistivity about $10^2{\Omega}{\cdot}cm$ at room temperature.

키워드

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