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US 11,752,471 B2Granted
Porous sintered membranes and methods of preparing porous sintered membranes
AssigneeEntegris, Inc.
InventorsVirendra Warke, Devon N. Dion, David Smith, Christopher Reddy, Meghan Patrick
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Abstract
Described are porous sintered bodies and methods of making porous sintered bodies by steps that include an injection molding step.
Claims11
A method of making a porous sintered body by particle injection molding a liquid injection composition into a shaped mold cavity, the method comprising:
- flowing the liquid injection composition into the shaped mold cavity, wherein the liquid injection composition comprises:
- at least one polymeric binder, and
- from 20 and 50 percent by volume solid metal particles, based on total volume of the liquid injection composition;
- causing the polymeric binder to solidify within the shaped mold cavity to form a solidified injection composition comprising solid binder surrounding the solid metal particles;
- removing the solidified injection composition from the mold cavity;
- removing the solid binder from the solidified injection composition to form a porous non-sintered body;
- and
- sintering the porous non-sintered body to form a porous sintered membrane, wherein the porous sintered membrane has a porosity in a range from 50 to 80 percent.
5 more elements
A liquid injection composition comprising:
- from 50 to 80 percent by volume polymeric binder, and
- from 20 and 50 percent by volume solid metal particles having a relative apparent density in a range from 5 to 35 percent of a theoretical density of the metal particles, based on total volume of the liquid injection composition.
Dependencies are inferred from the claim text.