Grading porous structure and its process
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United States of America Patent
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Issued Date -
Dec 9, 2004
app pub date -
Dec 4, 2003
filing date -
Jun 6, 2003
priority date (Note) -
Abandoned
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Abstract
It is an object to provide a method of manufacturing a porous medium having a grading porous structure, and there are provided a method of manufacturing a porous medium having a grading porous structure, comprising the steps of installing a sample consisting of a powder compact or a porous body in a rotating body, and heating the sample while applying a centrifugal force to the sample through high-speed rotation of the rotating body to produce a porous medium having a grading porous structure in which the pore size and the porosity change gradually by using the pressure grading in the sample arising through the centrifugal force, and such a method wherein the pore size and the porosity of the sample are predicted based on a linear shrinkage factor calculated through the equation: linear shrinkage factor=.DELTA.l/l.sub.0 (1) .DELTA.l: change in length upon shrinkage l.sub.0: original length. and a porous medium having a grading porous structure manufactured using the above method.
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