Thermal conductivity coefficient measurement instrument for solid material

A technology of thermal conductivity and solid materials, which is applied in the field of material thermal conductivity testing, can solve the problems of low accuracy and achieve the effect of reducing production costs and high stability
CN101464422BInactive Publication Date: 2011-02-02NAT INST OF METROLOGY CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NAT INST OF METROLOGY CHINA
Publication Date
2011-02-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides an instrument for measuring the coefficient of heat conductivity of a solid material. The instrument comprises a heating plate, wherein, the heating plate comprises a first hot band, a second hot band and a third hot band which are distributed side by side; the first hot band includes a first rectangular groove and a second rectangular groove, and the third hot band includes a first rectangular groove and a second rectangular groove; the second hot band includes two first rectangular grooves and two second rectangular grooves; one first rectangular groove and one secondrectangular groove in each hot band form one resistor; the resistors are electrically connected with each other in the form of Wheatstone bridge; and the measuring instrument further includes a constant voltage source or a constant power source, and a data acquisition system. The measuring instrument is capable of measuring the coefficient of heat conductivity from a heat insulating material to ametal material in a very short period of time, with the measuring range being 0.01-300Wm<-1>K<-1> and the uncertainty of the heat conductivity coefficient obtained within 5%.
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Description

technical field

[0001] The invention relates to the technical field of testing material thermal conductivity, in particular to a thermal conductivity measuring instrument for solid materials. Background technique

[0002] The physical parameter for evaluating the thermal insulation performance of a material is the thermal conductivity of the material itself, and its reciprocal determines the thermal resistance of the material. This is a thermophysical parameter that plays a decisive role in evaluating the thermal insulation performance of a material; Physical parameters have important uses in the fields of chemical engineering, materials, energy, power and refrigeration engineering, and are indispensable basic data in many industrial processes and product designs. With the rapid development of modern industry, the measurement of thermal conductivity of solid materials has been paid more and more attention by people.

[0003] The thermal conductivity of a substance can be ob...

Claims

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