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发明公开
CN101316642A 具有提高的强度的多孔堇青石陶瓷蜂窝体制品及其制造方法 有权

具有提高的强度的多孔堇青石陶瓷蜂窝体制品及其制造方法
摘要：
具有提高的机械强度和抗热冲击性的多孔堇青石陶瓷蜂窝体制品。所述多孔堇青石陶瓷蜂窝体制品的MA＜2220，或者MT＞2660，其中MA＝3645(IA)－106(CTE)+19(d90)+17(％孔隙率)，MT＝4711(IT)+116(CTE)－26(d90)－28(％孔隙率)，而且在至少一个方向上，CTE≤9×10－7/℃。还揭示了一种制造方法，其中所述无机原料包括滑石、氧化铝形成源、二氧化硅形成源、以及0－18重量％的高岭土或煅烧的高岭土，所述高岭土或煅烧的高岭土中中值粒径小于7微米的细高岭土源的含量不大于8重量％，所述烧制的多孔陶瓷堇青石蜂窝体制品的孔隙率＜54％。或者，如果所述细高岭土源的用量大于8重量％，则要在1200－1300℃范围内使用不大于20℃/小时的缓慢的升温速率。
摘要（英）：

A porous cordierite ceramic honeycomb article with increased mechanical strength and thermal shock resistance. The porous cordierite ceramic honeycomb article has MA<2220, OR MT>2660 wherein MA=3645 (IA)-106 (CTE)+19 (d90)+17 (% porosity), MT=4711 (IT)+116 (CTE)-26 (d90)-28 (% porosity), and a CTE<=9x10<-7>/ DEG C. in at least one direction. A method of manufacturing is also disclosed wherein the inorganic raw material mixture contains talc, an alumina-forming source, a silica-forming source, and 0-18 wt. % of a kaolin or calcined kaolin containing not more than 8 wt. % of a fine kaolin source having a median particle diameter of less than 7 mum, wherein the fired porous ceramic cordierite honeycomb article has a porosity<54% . Alternatively, if greater than 8 wt. % of the fine kaolin source is used, then a slow ramp rate is utilized from 1200 DEG C to 1300 DEG C of not more than 20 DEG C/hr.

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