Honeycomb structure, si-sic based composite material, method for manufacturing honeycomb structure, and method for manufacturing si-sic based composite material

蜂窝结构体、Si-SiC系复合材料、蜂窝结构体的制造方法及Si-SiC系复合材料的制造方法

Abstract

本发明的课题是更容易地形成电极部的同时,进一步降低体积电阻率。提供蜂窝结构体20,具备形成有作为流体流路的多个巢室23的隔壁部22。该蜂窝结构体20具备:电极部32,它形成于部分隔壁部22,具有SiC相、含Si氧化物、Al氧化物和碱土类金属氧化物的氧化物相,以及含有金属Si和金属Al且相对于金属Si和该金属Al的总量的金属Al的比例在0.001mol%以上20mol%以下的金属相;和发热部34,它是隔壁部22的一部分,体积电阻率高于电极部32。该蜂窝结构体,是在具有SiC相和含Si氧化物的氧化物相的蜂窝基材的部分表面上,形成含有金属Si和金属Al的浸渍基材和碱土类金属的化合物,在惰性气氛下加热,令金属Si及金属Al浸渍于蜂窝基材的气孔内而得到的。
A honeycomb structure 20 is provided with a partition portion 22 constituting a plurality of cells 23 serving as flow paths of a fluid. This honeycomb structure 20 includes electrode portions 32 which are disposed as parts of the partition portion 22 and which have a SiC phase, an oxide phase containing a Si oxide, an Al oxide, and an alkaline-earth metal oxide, and a metal phase containing metal Si and metal Al, where the proportion of metal Al relative to the total amount of metal Si and metal Al is 0.001 percent by mole or more and 20 percent by mole or less and a heat generation portion 34 which is a part of the partition portion 22 and which has a volume resistivity higher than that of the electrode portion 32. This honeycomb structure is obtained by forming an impregnation base material containing metal Si and metal Al and an alkaline-earth metal compound on a part of the surface of a honeycomb base material having a SiC phase and an oxide phase containing a Si oxide and impregnating metal Si and metal Al into pores of the honeycomb base material through heating in an inert gas atmosphere.

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