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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.122  No.1429 (September) (2014)  >  pp.772-776

Journal of the Ceramic Society of Japan
<<Previous article Vol.122  No.1429 (September) (2014)   pp.772 - 776 Next article>>

Synthesis of Al3BC3 particulates by carbo-thermal reduction process—Parameter optimization and mechanism analysis

Sea-Hoon LEE1), Jie YIN1), Lun FENG1), Jin Seok LEE2)
1) Korea Institute of Materials Science 2) Korea institute of Energy Research

The synthesis mechanism of Al3BC3 through carbo-thermal reduction process was investigated and the processing conditions were optimized using Al(OH)3–B2O3–C as starting materials. The mass change and phase formation of the compacts were analyzed with varying temperature. Excess Al(OH)3 and B2O3 were required compared to the stoichiometric composition due to the loss of the source materials by vaporization at 1,500–1,600°C. At 1,600°C, Al2O gas began to actively react with carbon to form Al4C3 on the carbon particles. Al, Al2O and B2O3 gases diffused through Al4C3 layer and reacted with carbon at and above 1,650°C to form Al3BC3. The formation of hexagonal terrace at the surface of synthesized powder indicated that the gases also reacted at the particle surface with carbon which diffused through the carbide layers. The reactions were completed after calcination at 1,725°C for 4 h or at 1,800°C for 1 h. Gas-solid reactions were the major synthesis mechanism. The optimum composition for the synthesis of the ternary compound was Al(OH)3:B2O3:carbon = 0.7:1.4:0.25 by weight.

Carbo-thermal reaction, Al3BC3, Powder, Synthesis, SiC

Received: February 24, 2014
Accepted: June 20, 2014 , Published online: September 01, 2014



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