Synthesis of porous Al<sub>2</sub>TiO<sub>5</sub> ceramic by reaction sintering method

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  • HONGZHI Cui
    College of Material Science and Engineering, Shandong University of Science and Technology
  • GUOGANG Xu
    College of Material Science and Engineering, Shandong University of Science and Technology
  • CHUANLIANG Ge
    College of Material Science and Engineering, Shandong University of Science and Technology
  • LIN Jiang
    College of Material Science and Engineering, Shandong University of Science and Technology
  • WENLONG Zheng
    College of Material Science and Engineering, Shandong University of Science and Technology

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  • Synthesis of porous Al₂TiO₅ ceramic by reaction sintering method

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Abstract

In this paper, porous aluminum titanate (Al2TiO5) ceramic was fabricated by reaction sintering method using Al2O3 and TiO2 as raw materials and corn starch as pore-forming agent. In order to decrease the decomposition and improve strength of porous Al2TiO5 ceramic, 5 wt % of Fe2O3 and 4 wt % of SiO2 were added as modifying agents. The influences of sintering temperature and content of pore-forming agent on phase constitution, apparent porosity, compressive strength and elemental distributions of the sintered products were investigated. The results show that porous Al2TiO5 ceramics with apparent porosity about 45–48% can be produced by reaction sintering method at temperature of 1500°C for 2 h. The synthesis yield of pure Al2TiO5 can achieve more than 95% using 5 wt % Fe2O3 and 4 wt % of SiO2 as modifying agents when sintering temperature was 1500°C. The distributions of Fe, Ti, Al and O are homogeneous in the grain, however majority of Si distributed in the grain boundaries of Al2TiO5 which is proved by the EMPA (elemental mapping image analysis).

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