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http://dx.doi.org/10.6111/JKCGCT.2010.20.4.178

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

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.)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.20, no.4, 2010 , pp. 178-184 More about this Journal
Abstract
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.
Keywords
Microwave-assistant combustion method; Post-annealing treatment; Electrical resistivity of C12A7:H;
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