Electrical vs Thermal Conductivity
Thermal conductivity thiab hluav taws xob conductivity yog ob qho tseem ceeb ntawm lub cev ntawm cov teeb meem. Lub thermal conductivity ntawm cov khoom piav qhia tias cov khoom siv tuaj yeem ua thermal zog sai npaum li cas. Cov hluav taws xob conductivity ntawm ib yam khoom piav txog cov hluav taws xob tam sim no uas yuav tshwm sim vim muaj qhov sib txawv ntawm qhov sib txawv. Ob qho tib si ntawm cov khoom no yog tus cwj pwm zoo thiab muaj ntau yam kev siv hauv kev lag luam xws li kev tsim hluav taws xob thiab kev sib kis, hluav taws xob engineering, hluav taws xob, thermodynamics thiab cua sov thiab ntau lwm yam. Nyob rau hauv tsab xov xwm no, peb yuav tham txog dab tsi thermal conductivity thiab hluav taws xob conductivity yog, lawv cov ntsiab lus, zoo sib xws ntawm thermal conductivity thiab hluav taws xob conductivity, lawv cov kev siv thiab thaum kawg qhov txawv ntawm thermal conductivity thiab hluav taws xob conductivity.
Electrical conductivity
Qhov kev tiv thaiv ntawm ib feem nyob ntawm ntau yam tsis muaj. Qhov ntev ntawm tus neeg xyuas pib, thaj tsam ntawm tus neeg xyuas pib, thiab cov khoom ntawm tus neeg xyuas pib yog lub npe rau qee yam. Cov conductivity ntawm cov khoom siv tau txhais tau tias yog qhov conductance ntawm ib lub thaiv uas muaj qhov ntev ntawm cov khoom. Lub conductivity ntawm ib yam khoom yog inverse ntawm lub resistivity. Kev coj ua feem ntau yog txhais los ntawm Greek tsab ntawv σ. SI unit ntawm conductivity yog siemens ib 'meter'. Nws yuav tsum tau muab sau tseg tias conductivity yog tshwj xeeb yog cov khoom ntawm cov khoom ntawm ib tug muab kub. Cov conductivity kuj tseem hu ua cov conductance tshwj xeeb. Cov conductance ntawm ib feem yog sib npaug rau cov conductivity ntawm cov khoom multiplied los ntawm cheeb tsam ntawm cov khoom muab faib los ntawm qhov ntev ntawm cov khoom. Thaum ua hluav taws xob, cov hluav taws xob hauv cov khoom txav los ntawm qhov muaj peev xwm siab dua mus rau qhov muaj peev xwm qis dua. Qhov kev coj ua ntawm ib feem tseem tuaj yeem txhais tau tias yog qhov tam sim no generated ib chav tsev voltage sib txawv. Cov conductance yog ib yam khoom ntawm cov khoom whereas hluav taws xob conductivity yog ib yam khoom ntawm cov khoom.
YThermal Conductivity
Thermal conductivity yog lub peev xwm ntawm cov khoom siv los ua lub zog thermal. Lub thermal conductivity yog ib qho khoom ntawm cov khoom. Thermal conductance yog ib yam khoom ntawm cov khoom. Txoj cai tseem ceeb tshaj plaws tom qab thermal conductivity yog qhov sib npaug ntawm cov cua sov. Qhov kev sib npaug no hais tias tus nqi ntawm cov cua sov ntws los ntawm ib qho khoom muab yog proportional rau thaj tsam ntawm ntu ntawm cov khoom thiab qhov kub thiab txias gradient. Hauv daim ntawv lej, qhov no tuaj yeem sau ua dH / dt=kA (∆T) / l, qhov twg k yog thermal conductivity, A yog qhov chaw hla, ∆T yog qhov kub sib txawv ntawm ob kawg thiab l yog qhov ntev ntawm qhov khoom. ∆T/l tuaj yeem raug hu ua qhov kub thiab txias. Thermal conductivity yog ntsuas nyob rau hauv watt ib kelvin ib meter.
Qhov txawv ntawm Thermal Conductivity thiab Hluav Taws Xob Conductivity yog dab tsi?
• Nyob rau hauv thermal conduction, lub tshav kub yog kis los ntawm oscillation ntawm atoms nyob rau hauv cov khoom. Nyob rau hauv hluav taws xob conduction, cov electrons lawv tus kheej txav mus rau hauv thiaj li yuav tsim cov tam sim no.
• Feem ntau ntawm cov thermal conductors yog cov khoom siv hluav taws xob zoo, ob qho tib si thermal conductivity thiab hluav taws xob conductivity nyob ntawm cov khoom siv.
• Hauv thermal conductivity, lub zog raug xa mus tab sis hauv hluav taws xob conductivity electrons raug xa mus.
