CERAMIC FILTER

To provide a ceramic filter having a columnar honeycomb structure that can achieve both high PM collection performance and low pressure loss.SOLUTION: A ceramic filter has a columnar honeycomb structure with a plurality of holes that is observed, from a surface of a porous partition wall using a las...

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Hauptverfasser:	KANETAKE TAKAYUKI, TOKUDA SHINGO, UEDA SHUJI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE LIME, MAGNESIA METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL REFRACTORIES SEPARATION SLAG TRANSPORTING TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	To provide a ceramic filter having a columnar honeycomb structure that can achieve both high PM collection performance and low pressure loss.SOLUTION: A ceramic filter has a columnar honeycomb structure with a plurality of holes that is observed, from a surface of a porous partition wall using a laser microscope, to have: a slope (y/x), being 0 to 0.20 in 20≤x≤40, of a regression line plotted with equivalent circle diameters (μm) of respective holes on an x-axis, and hole depths (μm) of the respective holes on a y-axis in two-dimensional coordinates obtained by a minimum square method; an average value, being 2.5 μm to 5.0 μm, of hole depths of the plurality of holes; and a number density, being 600 holes/mm2 to 2450 holes/mm2, of the plurality of holes.SELECTED DRAWING: Figure 1 【課題】ＰＭの高捕集性能及び低圧損を両立可能な柱状ハニカム構造を有するセラミックス製のフィルタを提供する。【解決手段】多孔質の隔壁の表面から複数の孔をレーザー顕微鏡を用いて観察したとき、各孔の円相当径（μｍ）をｘ軸、各孔の孔深さ（μｍ）をｙ軸として、二次元座標に円相当径及び孔深さをプロットし、２０≦ｘ≦４０において最小二乗法により求めた回帰直線の傾き（ｙ／ｘ）が０〜０．２０であり、前記複数の孔の孔深さの平均値が２．５μｍ〜５．０μｍであり、且つ、前記複数の孔の個数密度が６００個／ｍｍ2〜２４５０個／ｍｍ2である柱状ハニカム構造を有するセラミックス製のフィルタ。【選択図】図１