HEAT CONDUCTIVITY MEASURING METHOD AND APPARATUS THEREFOR

PROBLEM TO BE SOLVED: To provide a heat conductivity measuring method capable of shortening a measurement time and improving measurement accuracy compatibly without enlarging a facility regardless of the kind of a measurement sample, and an apparatus therefor.SOLUTION: A heat conductivity measuring apparatus comprises: a ceramic heater 22 for heating a measurement sample S in a transient manner; a processing device 3; and temperature sensors 24a-24d that are disposed at an equal interval (x). The processing device 3 includes: a representative measurement resin setting part 33 for setting, as a representative measurement region R, the temperature sensors 24b and 24c adjacent to a second attenuation property Z1 in which a peak value of a differentiation value exceeds 1 among second attenuation properties Z1-Z3 obtained by differentiating first attenuation properties Y1-Y3 resulting from subtracting temperature changes of adjacent temperature sensors 24a-24d, and correspondent to the second attenuation property Z2 in which the peak value is less than 1; a heat capacity calculation part 35 for calculating heat capacity C by using a temperature gradient coefficient A based on an attenuation time Δt and a temperature reduction value ΔT of the first attenuation property Y1 corresponding to the representative measurement region R; and a heat conductivity calculation part 36 for calculating heat conductivity λ by using the attenuation time Δt and the temperature reduction value ΔT.SELECTED DRAWING: Figure 2 【課題】測定試料の種類に拘らず設備の大型化を招くことなく、測定時間の短縮化と測定の高精度化とを両立することができる熱伝導率測定方法及びその装置を提供する。【解決手段】測定試料Ｓを過渡的に加熱するセラミックヒータ２２と、処理装置３と、均等間隔ｘに配置された温度センサ２４ａ〜２４ｄを設け、処理装置３が、隣り合う温度センサ２４ａ〜２４ｄの温度変化を差分した第１減衰特性Ｙ１〜Ｙ３を微分した第２減衰特性Ｚ１〜Ｚ３のうち微分値のピーク値が１を超える第２減衰特性Ｚ１に隣接し且つピーク値が１未満の第２減衰特性Ｚ２に対応した温度センサ２４ｂ，２４ｃを代表測定領域Ｒに設定する代表測定領域設定部３３と、代表測定領域Ｒに対応した第１減衰特性Ｙ１の減衰時間Δｔと温度低下値ΔＴによる温度勾配係数Ａを用いて熱容量Ｃを演算する熱容量演算部３５と、減衰時間Δｔと温度低下値ΔＴを用いて熱伝導率λを演算する熱伝導率演算部３６を有する。【選択図】 図２