DISPERSION-TOUGHENED CORDIERITE FOR FILTER AND SUBSTRATE APPLICATIONS
    7.
    发明申请
    DISPERSION-TOUGHENED CORDIERITE FOR FILTER AND SUBSTRATE APPLICATIONS 审中-公开
    用于过滤器和基板应用的分散 - 增韧的腐蚀剂

    公开(公告)号:WO2009110974A1

    公开(公告)日:2009-09-11

    申请号:PCT/US2009/001189

    申请日:2009-02-26

    Abstract: A porous ceramic substrate includes a first phase of microcracked cordierite ceramic material and a second phase of non-cordierite metal oxide particles dispersed in the cordierite ceramic, wherein at least a portion of the interface between the first and second phases is wetted by glass and the particles of the second phase have a size in the range of from about 0.1 to about 10 µm. A method for toughening a porous microcracked cordierite ceramic includes the steps of providing a cordierite batch composition; adding to the cordierite batch composition at least one non-cordierite forming metal oxide or metal oxide precursor; mixing the batch composition with a pore former, binder, and water into a paste; shaping the paste into a green body; firing the green body; and annealing the fired green body at a temperature below the firing temperature to form a toughened cordierite ceramic honeycomb having a second phase of crystallized non-cordierite particles dispersed within the cordierite ceramic, wherein at least a portion of the interface between the first and second phases is wetted by glass.

    Abstract translation: 多孔陶瓷衬底包括微裂纹堇青石陶瓷材料的第一相和分散在堇青石陶瓷中的非堇青石金属氧化物颗粒的第二相,其中第一相和第二相之间的界面的至少一部分被玻璃润湿, 第二相的颗粒的尺寸在约0.1至约10μm的范围内。 一种增韧多孔微裂纹堇青石陶瓷的方法包括提供堇青石批料组合物的步骤; 向所述堇青石批料组合物中加入至少一种形成非堇青石的金属氧化物或金属氧化物前体; 将分批组合物与成孔剂,粘合剂和水混合成糊状物; 将糊状物变成绿色的身体; 点燃绿色的身体 以及在低于焙烧温度的温度下对烧制的生坯退火以形成具有分散在堇青石陶瓷内的结晶非堇青石颗粒的第二相的增韧堇青石陶瓷蜂窝体,其中第一相和第二相之间的界面的至少一部分 被玻璃润湿。

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