Assertion: honeycomb's porosity | /r/HasProperty | high
Facets:
value: relatively
type: DEGREE
value: excessively
type: DEGREE
value: in order to reduce the pressure loss
type: PURPOSE
Source sentences:
text: According to this configuration, also in circumstances where a porosity of partition walls of the honeycomb structure is high (i.e., the isostatic strength is low), the honeycomb structure can be held in the can member by the uneven portion, and hence it is not necessary to apply any high holding pressure to the honeycomb structure.
text: As described above, in the wall-flow honeycomb for the GPF, the porosity is high in order to reduce the pressure loss, and since the outer peripheral wall is also of a porous material having air permeability as with the cell partition walls, occurrence of cracking due to penetration of the catalyst slurry is serious.
text: When the porosity is excessively low, the purification performance might deteriorate, and on the other hand, when the porosity is excessively high, the strength might decrease.
text: When the ratio of the specific surface area of the honeycomb unit to the specific surface area of the coating layer is less than approximately 1.3, gas easily penetrates the inside of the coating layer since the specific surface area of the coating layer is relatively high, that is, the porosity of the coating layer is relatively high.
text: When the porosity is excessively low, the purification performance might deteriorate, and on the other hand, when the porosity is excessively high, the strength might decrease.
text: When the ratio of the specific surface area of the honeycomb unit to the specific surface area of the coating layer is less than approximately 1.3, gas easily penetrates the inside of the coating layer since the specific surface area of the coating layer is relatively high, that is, the porosity of the coating layer is relatively high.
text: That is, in the honeycomb structure according to claim 5, since there is no portion where the porosity is extremely high, the exhaust gas can flow more evenly over the entire cell wall, and the cell wall of the entire honeycomb structure
text: Here, in the sparse part in a cell wall, since the porosity is high, it is thought that exhaust gas is easy to pass through a cell wall.
text: When the porosity is high, the mass of the honeycomb substrate 1 for exhaust gas purification becomes light, but the mechanical strength decreases.