Fabrication and characteristics of porous ceramics from ZrTiO₄based  ceramic material

허근; 심광보; 명성재; 이용현; 전명표; 조성호; 김병익

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자료유형: 학술저널

저자정보: 허근 심광보 명성재 이용현 전명표 조성호 김병익

저널정보: 한국결정성장학회 한국결정성장학회지 한국결정성장학회지 제18권 제1호

발행연도: 2008.1

수록면: 5 - 9 (5page)

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Cordierite has a very low thermal expansion coefficient, but has problem that it has a weak mechanical strength and is apt to be attacked by acid such as sulfur for using as a diesel particulate filter support. The physical properties of ZrTiO₄modified with SiO₂, Al₂O₃, MoOx, Cr₂O₃ and Nb₂O5 were investigated with XRD, SEM, UTM and thermal expansion, etc. in this paper. ZrTiO₄powder was synthesized as a monoclinic structure with processes that starting materials of TiO₂ and ZrO₂were mixed with ball mill and calcined above 1240℃ for 3 hr. Additive modified ZrTiO₄specimens for flexural strength and thermal expansion measurement were obtained by mixing ZrTiO₄ powder with additives, pressing and firing at 1300℃ for 3 hr. The porosity of additive modified ZrTiO₄decreased monotonically with increasing additive content by 5 wt% regardless of additive types and saturated for further increase of additive by 10wt. The flexural strength of Al2O3 (5, 10 wt%) modified ZrTiO₄shows a large increase, but that of other additives modified ZrTiO₄decreased. The thermal expansion coefficient of additive modified ZrTiO4 except Nb₂O5 decreased continuously with the content of additive. In particular, the lowest thermal expansion coefficient of ZrTiO₄was obtained for the additive of SiO₂.

#Cordierite #Thermal expansion coefficient #Flexural strength #Porous ceramics

참고문헌 (8)

참고문헌 신청

A. Okada / 2005 / / Bull. Ceram. Soc. Jpn 40 (4) : 259 ~

A. Okada / 2005 / / Engineering Materials (Kogyo Zairyo) 53 (8) : 23 ~

H.K. Matralis / 1995 / Vanadia catalysts supported on mixed TiO2-Al2O3 supports, effect of composition on the structure and acidity / J. of Catalysis 157 : 368 ~

K. Kato / 1999 / / FC Report 17 (8) : 194 ~

K. Takane / 1936 / / J. Jpn. Assoc. Mineral. Petrol. Ecib. Geol 16 : 101 ~

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