摘要:
Process for the fabrication of porous bodies mainly constituted by SiC containing ceramic with a microstructure which is interfused with micro-channels which consists of the process steps a) Provision of a pre-body made from cellulose or pulp b) Fabrication of an infiltration solution or a slurry consisting of (A) solvent, polysilazane, polysilane and/or polycarbosilane or (B) solvent, polysilazane and/or polysilane as well as active metallic fillers and/or passive ceramic fillers. c) Infiltrating the body with infiltration solution or slurry d) Cross-linking of the polysilazane, polycarbosilane and/or polysilane while generating a solid green body e) Ceramization through pyrolysis of the green body in an inert-gas atmosphere. f) Removal of residual carbon with an oxidizing thermal process, thereof producible catalyst carriers or carbon particulate filters as well as Porous ceramic which is made from at least 80% SiC in which the porous ceramic features a microstructure with micro-channels consisting mainly of SiC coated micro-channels featuring an average diameter between 1 and 25 μm and webs of SiC located between the micro-channels as well as additional ceramic materials with a content below 20 wt %.
摘要:
Electrically insulating ceramic gas supply plenums for solid electrolyte fuel cells in which the plenums are formed from a mixture of ceramic components and the proportions of the components in the mixture are adjusted to match the coefficient of thermal expansion of the plenum to that of the solid electrolyte. A preferred ceramic is formed from a mixture of MgO and Al.sub.2 O.sub.3 having a MgO/Al.sub.2 O.sub.3 molar ratio of from 1:1 and 7:1.
摘要翻译:用于固体电解质燃料电池的绝缘陶瓷气体供应增压室,其中通过陶瓷组分的混合物和混合物中组分的比例形成增压室,以调节气室与固体电解质的热膨胀系数 。 优选的陶瓷由具有MgO / Al 2 O 3摩尔比为1:1和7:1的MgO和Al2O3的混合物形成。
摘要:
A Positive Temperature Coefficient of Resistance resistor includes a ceramic material of the composition [(Ba.sub.1-e-x Sr.sub.x R.sub.e).sub.1-a M.sub.a ][(Ti.sub.1-b-d N.sub.b Q.sub.d)].sub.c O.sub.3, wherein M is a trivalent or quadrivalent element or a mixture of two or several of these elements; N is a quinquevalent or hexavalent element or a mixture of two or several of these elements; Q is a quadrivalent element or a mixture of two or several of these elements; R is a bivalent element or a mixture of two or several of these elements; and 0.5.ltoreq.x.ltoreq.1, a is 0 or 0.0003.ltoreq.a.ltoreq.0.3, and b is 0 or 0.0003.ltoreq.b.ltoreq.0.3, 0.8.ltoreq.c.ltoreq.1.2, 0.ltoreq.d.ltoreq.0.2, and 0.ltoreq.e.ltoreq.0.2.
摘要翻译:电阻电阻的正温度系数包括组成[(Ba1-e-xSrxRe)1-aMa] [(Ti1-b-dNbQd)] cO3的陶瓷材料,其中M是三价或四价元素或两者的混合物 或这些元素中的几个; N是一种五价或六价元素或两种或几种这些元素的混合物; Q是四价元素或两种或几种这些元素的混合物; R是这些元素的二价元素或两种或几种的混合物; 和0.5≤x≤1,a为0或0.0003 = a = 0.3,b为0或0.0003≤b≤0.3,0.8≤c≤1.2, 0 = d = 0.2,0