Thermal conductivity measuring method and apparatus, and gas component ratio measuring apparatus

A heat radiation coefficient C [=Ph/(Th−To)] from a microheater is calculated in accordance with a power Ph applied to the microheater which is supported in air and provided in an ambient gas, a heater temperature Th, and an ambient temperature To at this moment. Further, a thermal conductivity λ(T)...

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Bibliographische Detailangaben
Hauptverfasser:	OOISHI YASUHARU, SHINGYOUJI NOBUYOSHI, HAYASHI YASUE, MORIO SHUJI, AOSHIMA SHIGERU
Format:	Patent
Sprache:	eng
Schlagworte:	INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS TESTING
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Beschreibung
Zusammenfassung:	A heat radiation coefficient C [=Ph/(Th−To)] from a microheater is calculated in accordance with a power Ph applied to the microheater which is supported in air and provided in an ambient gas, a heater temperature Th, and an ambient temperature To at this moment. Further, a thermal conductivity λ(T) of the ambient gas is obtained from the calculated heat radiation coefficient C based on a proportional relation [C=K·λ(T)] between a thermal conductivity λ(T) of the ambient gas and the heat radiation coefficient C at a measurement temperature T [=(Th−To)/2].