Assertion: cordierite's resistance | /r/HasProperty | excellent
Facets:
Source sentences:
text: The reason why the chemical composition range is limited to 42-52% by weight of silica, 34-48% by weight of alumina and 10-18% by weight of magnesia is based on the fact that as mentioned above, when the chemical composition is within such a range, the thermal expansion coefficient in a temperature range of 25°-1,000° C. is less than 22×10-7 (1/°C.) and the temperature difference through which such materials are durable to rapid heating and quenching of an indication of the thermal shock resistance is higher than 500° C. and when such a ceramic honeycomb is used as the catalyst substrate for the apparatus for purifying the exhaust gas for a long period of time, cracks or breakage are not caused and the thermal resistance is excellent.
text: As mentioned above, since cordierite honeycomb according to the present invention consists mainly of cordierite in the crystal phase and contains not more than 20% by weight of at least one crystal of spinel, mullite and corundum, both the thermal shock resistance and the thermal resistance are excellent and said cordierite ceramic honeycomb has the mean pore size of 3-30 micron meter, so that the adhering ability of the catalyst is also excellent.
text: The reason why the chemical composition range is limited to 42-52% by weight of silica, 34-48% by weight of alumina and 10-18% by weight of magnesia is based on the fact that as mentioned above, when the chemical composition is within such a range, the thermal expansion coefficient in a temperature range of 25°-1,000° C. is less than 22×10-7 (1/°C.) and the temperature difference through which such materials are durable to rapid heating and quenching of an indication of the thermal shock resistance is higher than 500° C. and when such a ceramic honeycomb is used as the catalyst substrate for the apparatus for purifying the exhaust gas for a long period of time, cracks or breakage are not caused and the thermal resistance is excellent.
text: As mentioned above, since cordierite honeycomb according to the present invention consists mainly of cordierite in the crystal phase and contains not more than 20% by weight of at least one crystal of spinel, mullite and corundum, both the thermal shock resistance and the thermal resistance are excellent and said cordierite ceramic honeycomb has the mean pore size of 3-30 micron meter, so that the adhering ability of the catalyst is also excellent.