摘要
Glass/stainless steel porous composite body were prepared by the polyurethane sponge replica method using slurries containing mixture of SiO_2-RO/30 vol%SUS.Sintered porous samples were obtained which consists of well-distributed stainless steel particles within the glass matrix.Such a microstructure is desired for the purpose as a soot particulate filters(DPF)utilizing microwave rapid heating in cold start phase.Heating ability of the fabricated porous composite body was carried out placing the specimen in the maximum H-field of a 2.45 GHz single mode applicator. Heating behavior of the samples was mainly influenced by the volume fraction of stainless steel.Higher heating rate was observed for samples with higher stainless steel fraction.Due to the different microwave absorbability of the materials, stainless steel particle in the porous matrix structure was firstly heated up by microwave and transferred the heat energy throughout the whole sample.Increasing of the fraction of the stainless steel particle in the matrix structure led the better heating;however the strength of the samples decreased.
Glass/stainless steel porous composite body were prepared by the polyurethane sponge replica method using slurries containing mixture of SiO_2-RO/30 vol%SUS.Sintered porous samples were obtained which consists of well-distributed stainless steel particles within the glass matrix.Such a microstructure is desired for the purpose as a soot particulate filters(DPF)utilizing microwave rapid heating in cold start phase.Heating ability of the fabricated porous composite body was carried out placing the specimen in the maximum H-field of a 2.45 GHz single mode applicator. Heating behavior of the samples was mainly influenced by the volume fraction of stainless steel.Higher heating rate was observed for samples with higher stainless steel fraction.Due to the different microwave absorbability of the materials, stainless steel particle in the porous matrix structure was firstly heated up by microwave and transferred the heat energy throughout the whole sample.Increasing of the fraction of the stainless steel particle in the matrix structure led the better heating;however the strength of the samples decreased.
