Porous ceramic filter and preparation thereof

A method for preparing a ceramic filter, comprising the steps of:

• mixing together a ceramic powder, a pore forming agent, and any sintering aids required in the sintering of the ceramic powder;
• forming the mixture into a tape;
• molding two types of cylindrical annular disk filter plates from the tape,
• a first filter plate type having an opening on an external periphery of the annular disk, and
• a second filter plate type having an opening on an internal periphery of the annular disk;
• stacking the filter plates together in an alternating fashion with end pieces to form a hollow cylindrical filter assembly;
• and
• sintering the filter assembly.

A method for preparing a ceramic filter, comprising the steps of:

• mixing together a ceramic powder, a pore forming agent, a plasticizer, and a binder;
• rolling the mixture into a tape;
• molding two types of filter plates from the tape,
• a first filter plate having a first plate interior periphery, a first plate exterior periphery, a first plate interior wall along the first plate interior periphery, and first plate ribs extending from the first plate interior wall toward the first plate exterior periphery, and
• a second filter plate having a second plate interior periphery, a second plate exterior periphery, a second plate exterior wall along the second plate exterior periphery, and ribs extending from the second plate exterior wall toward the second plate interior periphery, the first plate interior periphery being configured to align with the second plate interior periphery when the first filter plate is stacked together with the second filter plate;
• stacking the filter plates together with the first plate interior periphery and the second plate interior periphery aligned to form a filter assembly having an interior plenum;
• and
• sintering the filter assembly.

A method for preparing a ceramic filter, comprising the steps of:

• mixing together a ceramic powder, a pore forming agent, and any sintering aids required in the sintering of the ceramic powder;
• forming the mixture into a tape;
• molding two types of disk filter plates from the tape, each of the filter plate types having an external periphery and an internal periphery,
• a first filter plate type having an opening on an external periphery of the disk, and
• a second filter plate type having an opening on an internal periphery of the disk;
• stacking the filter plates together in an alternating fashion with end pieces to form a filter assembly having an internal plenum defined by the alignment of the internal peripheries of the two filter plate types;
• and
• sintering the filter assembly.