Articles
  • The effect of the sintering temperature on the properties of porous YAG ceramics
  • Jieguang Songa,*, Lin Chena, Cailiang Panga, Jia Zhanga, Weiguo Shia, Songlin Guoa, Xianzhong Wanga and Minghan Xub
  • aEngineering & Technology Research Center for Environmental Protection Materials and Equipment of Jiangxi Province, School of Materials and Chemistry Engineering, Pingxiang University, Pingxiang 337055 China bSchool of Mechanical and Materials Engineering, Jiujiang University, Jiujiang 332005 China
Abstract
Pure yttrium aluminum garnet (YAG) powders and the porous YAG ceramics were prepared via co-precipitation method and using vacuum sintering technology, respectively. Through an analysis and discussion, porous YAG ceramics, with a homogeneous and regular pore microstructure, a pore size of about 5 μm, regular crystalline particles, showing intergranular fracture, were sintered at 1500 oC. Porous YAG ceramics, with a homogeneous and regular pore microstructure, a pore size for about 2-5 μm, crystals with a rod-shape or acicular structure, showing intergranular fracture and intracrystalline fracture, were sintered at 1550 oC. Porous YAG ceramics, with an extension pore microstructure, a crystalline laminate structure, showing intracrystalline fracture, were sintered at 1600 oC. With an increase in the sintering temperature, the porosity is decreased gradually and the energy consumption is increased. The best sintering temperature for porous YAG ceramics was decided to be 1550 oC through considering the performance price ratio among the porosity, the mechanical properties and the energy consumption.

Keywords: YAG porous ceramics, Sintering temperature, Microstructure, Porosity, Mechanical property

This Article

  • 2018; 19(1): 11-14

    Published on Feb 28, 2018