Effect of MgO/CuO on the Microstructure and Thermal Properties of Cordierite–Alumina Ceramics

Li Ying Tang; Xi Cheng; Ping Lu; Fang Yue

doi:10.4028/www.scientific.net/KEM.509.240

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 509Effect of MgO/CuO on the Microstructure and...

Effect of MgO/CuO on the Microstructure and Thermal Properties of Cordierite–Alumina Ceramics

Abstract:

Abstract: Cordierite–alumina ceramics were prepared with the raw materials of cordierite and α-alumina powder, and TiO2，CuO and MgO were added as composite additives. The effect of MgO/ CuO ratios on the microstructure, thermal conductivity and thermal shock resistance of cordierite–alumina ceramics were researched by X-ray diffraction, scanning electron microscopy and laser flash analyzer; the bulk density and the porosity of cordierite – alumina ceramics were measured. The results show that with increasing of MgO/CuO ratios, the bulk density and thermal conductivity increase firstly and then decrease, and have a minimum with 0.4wt% MgO and 0.667 MgO/CuO; and the porosity of ceramics decreases firstly and then increases and has a maximum with 0.4wt% MgO and 0.667 MgO/CuO;There are little changes in the size of the grain of the ceramics, and a small amount of magnesium aluminate spinel precipitate; the thermal shock resistance performance of the ceramics is developed with the increasing of MgO/CuO ratios.

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Periodical:

Key Engineering Materials (Volume 509)

Pages:

240-244

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.509.240

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Online since:

April 2012

Authors:

Li Ying Tang, Xi Cheng, Ping Lu, Fang Yue

Keywords:

Alumina, Cordierite, MgO/CuO, Microstructure, Thermal Property

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