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    孙怡, 刘常华, 周国红, 彭翔, 刘娟, 王士维. 凝胶注模成型和机械发泡工艺制备多孔硅酸锆陶瓷的显微结构和抗压性能[J]. 机械工程材料, 2015, 39(2): 94-97.
    引用本文: 孙怡, 刘常华, 周国红, 彭翔, 刘娟, 王士维. 凝胶注模成型和机械发泡工艺制备多孔硅酸锆陶瓷的显微结构和抗压性能[J]. 机械工程材料, 2015, 39(2): 94-97.
    shu
    SUN Yi, LIU Chang-hua, ZHOU Guo-hong, PENG Xiang, LIU Juan, WANG Shi-wei. Microstructure and Compressive Properties of Porous Zirconium Silicate Ceramics Prepared by Gelcasting and Mechanical Foaming[J]. Materials and Mechanical Engineering, 2015, 39(2): 94-97.
    Citation: SUN Yi, LIU Chang-hua, ZHOU Guo-hong, PENG Xiang, LIU Juan, WANG Shi-wei. Microstructure and Compressive Properties of Porous Zirconium Silicate Ceramics Prepared by Gelcasting and Mechanical Foaming[J]. Materials and Mechanical Engineering, 2015, 39(2): 94-97.
    shu

    凝胶注模成型和机械发泡工艺制备多孔硅酸锆陶瓷的显微结构和抗压性能

    Microstructure and Compressive Properties of Porous Zirconium Silicate Ceramics Prepared by Gelcasting and Mechanical Foaming

      摘要
    • 摘要: 以工业锆英砂为原料,以体积分数0.1%~0.5%十二烷基硫酸三乙醇胺的表面活性剂水溶液(Surf-E)为发泡剂,采用凝胶注模成型和机械发泡工艺相结合的方法制备了多孔硅酸锆陶瓷;用流变仪、X射线衍射仪、扫描电镜、材料试验机等手段表征了锆英砂浆料的流变性和多孔硅酸锆陶瓷的物相、断口形貌及抗压性能.结果表明:加入体积分数0.5% 发泡剂(Surf-E)和质量分数0.2%增稠剂(CMC)浆料的流变性能最好;高温烧结后,多孔陶瓷的主要晶相为正方结构的ZrSiO4相和少量单斜结构的ZrO2相,气孔接近球状,平均尺寸为100 μm,孔壁粗糙不平,多孔陶瓷的密度为1.83 g·cm-3,显气孔率为54.3%,抗压强度为24.6 MPa.

       

      Abstract: Porous zirconium silicate ceramics were successfully prepared using industrial zircon as raw material and 0.1vol.%-0.5vol.% C12H25OSO3H·N(C2H4OH)3 aqueous solution (Surf-E) as foaming agent via gelcasting and mechanical foaming method.The rheological behavior of slurries and the phase,fracture morphology and compressive properties of the porous ceramics were characterized by arheometer,X-ray diffractometer,scanning electron microscope and material tester.The result show that the slurry with 0.5vol.% foaming agent (Surf-E )and 0.2wt.% thickener (CMC) showed the best rheological behavior.After high temperature sintering,the porous zirconium silicate ceramic was of tetragonal structure ZrSiO4 with little monoclinic structure ZrO2.The cellular structure was nearly spherical with average size of 100 μm while the cell wall was rugged.The average compressive strength of porous ceramic with a density of 1.83 g·cm-3 and porosity of 54.3% was about 24.6 MPa.

       

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