Thermal conductivity measuring device, heating device, thermal conductivity measuring method, and quality assurance method

A heating device comprising:

• an induction heat source;
• a sample container that is provided on an upper surface or a side surface of the heat source and has a plurality of storage sections;
• a drive unit that is configured to rotate the heat source and thereby rotate the sample container together with the heat source;
• a radiation thermometer that is configured to measure a temperature of a surface of the sample container;
• and
• a heat-insulating material that covers at least a portion of a surface of the heat source,
• wherein the heat-insulating material forms at least a space that surrounds the sample container,
• wherein a surface of the sample container opposite to the heat source is exposed to the space that is surrounded by the heat-insulating material, and
• wherein the heat-insulating material has
• a first part which surrounds a lateral side of the heat source,
• a second part which surrounds an upper side of the heat source, and
• a third part which surrounds a lower side of the heat source,
• wherein
• the first part and the third part forms a first space in which the heat source is provided, and
• the second part forms a second space in which the sample container is provided,
• a thickness of the first part is larger than that of the second part, and
• the second part has a temperature measurement hole for the radiation thermometer.

A thermal conductivity measuring method comprising:

• a measurement step of moving a standard sample and an object sample within a sample container within a heat insulating material that has a plurality of sections to measure temperatures of the standard sample and the object sample at same position, wherein the heat insulating material has a measurement hole;
• a heating step using an induction heater surrounding the heat insulating material;
• and
• a derivation step of obtaining a thermal conductivity, of the object sample in a measurement environment on the basis of the respective temperatures measured in the measurement step.

A quality assurance method comprising:

• a measurement step of moving a first standard sample having a first thermal conductivity value, a second standard sample having a second thermal conductivity value, and an object ample within a sample container within a heat insulating material that has a plurality of sections, and measuring temperatures of the first standard sample, the second standard sample, and the object sample at same position;
• respectively, wherein the heat insulating material has a measurement hole;
• a heating step using an induction heater surrounding the heat insulating material;
• and
• a determination step of determining whether or not a measured third temperature of the object sample falls between a first temperature of the first standard sample and a second temperature of the second standard sample that are measured.