Qhov sib txawv tseem ceeb ntawm dielectric tas li thiab txheeb ze permittivity yog qhov dielectric tas li hais txog qhov txheeb ze permittivity ntawm cov khoom dielectric whereas txheeb ze permittivity yog hais txog permittivity ntawm ib yam khoom piv rau permittivity ntawm lub nqus tsev.
Cov ntsiab lus permittivity thiab dielectric tas li yog siv hauv tshuab capacitor; Piv txwv li, siv cov capacitors nrog cov dielectric sib txawv. Txawm li cas los xij, nyob rau hauv feem ntau cov ntsiab lus, peb siv cov ntsiab lus no raws li cov ntsiab lus.
Dielectric Constant yog dab tsi?
Lub sij hawm dielectric tas li yog hais txog cov cuab yeej ntawm cov khoom siv hluav taws xob hluav taws xob uas sib npaug ntawm qhov sib piv ntawm qhov muaj peev xwm ntawm cov khoom mus rau lub peev xwm ntawm lub tshuab nqus tsev. Feem ntau, peb siv lo lus no sib hloov nrog cov txheeb ze permittivity, txawm tias lawv muaj qhov sib txawv me ntsis. Cov khoom siv hluav taws xob insulating yog hu ua "dielectric". Nyob rau hauv lub ntsiab lus ntawm dielectric tas li, lub sij hawm capacitance ntawm cov khoom yog hais txog lub capacitance ntawm ib tug capacitor uas tau sau nrog cov khoom tshwj xeeb. Thaum txiav txim siab lub capacitance ntawm lub tshuab nqus tsev, nws hais txog lub peev xwm ntawm lub capacitor zoo tib yam yam tsis muaj cov khoom siv dielectric.
Daim duab 01: Txhais Dielectric Constant hauv daim duab
Nyob rau hauv ib lub capacitor, muaj cov paib sib npaug hauv nruab nrab uas tuaj yeem sau nrog cov khoom siv dielectric. Kev muaj cov khoom siv dielectric ntawm ob daim hlau no ib txwm ua kom lub peev xwm nce ntxiv. Qhov ntawd txhais tau tias; nws nce lub peev xwm ntawm lub capacitor khaws cov nqi sib txawv ntawm txhua lub phaj, piv rau nws lub peev xwm tuav cov nqi thaum muaj lub tshuab nqus tsev ntawm ob daim hlau. Rau lub tshuab nqus tsev ntim capacitor, lub capacitance yog suav tias yog ib qho raws li tus qauv siv. Yog li ntawd, txhua yam khoom siv dielectric qhia tau hais tias dielectric tas li uas ntau tshaj ib.
Tus txheeb ze Permittivity yog dab tsi?
txheeb ze permittivity yog permittivity ntawm ib yam khoom nrog siv rau kev tso cai ntawm lub tshuab nqus tsev. Lub permittivity yog ib yam khoom ntawm ib yam khoom uas piav txog lub Coulomb quab yuam ntawm cov ntsiab lus them ntawm cov khoom. Nws yog ib qho tseem ceeb los ntawm qhov chaw hluav taws xob (nruab nrab ntawm ob lub ntsiab lus them nqi) txo qis piv rau lub tshuab nqus tsev.
Daim duab 02: Tus txheeb ze Permittivity ntawm dej hauv daim duab
Peb tuaj yeem muab kev tso cai txheeb ze raws li hauv qab no:
εr=ε/ ε0
qhov twg εr yog tus txheeb ze permittivity, ε yog qhov nyuaj-dependent permittivity ntawm cov khoom, thiab ε0yog qhov permittivity ntawm lub tshuab nqus tsev. Tus txheeb ze permittivity yog qhov tsis muaj nuj nqis, thiab nws feem ntau yog tshwj xeeb rau cov khoom siv. Piv txwv li, tus txheeb ze permittivity ntawm pob zeb diamond yog 5.5, rau pob zeb nws yog 4.5, thiab lwm yam.
Qhov txawv ntawm Dielectric qhov tsis tu ncua thiab txheeb ze Permittivity yog dab tsi?
Qhov sib txawv tseem ceeb ntawm dielectric tas li thiab txheeb ze permittivity yog lub sij hawm dielectric tas li hais txog qhov txheeb ze permittivity ntawm cov khoom dielectric whereas txheeb ze permittivity yog hais txog qhov permittivity ntawm ib yam khoom piv rau permittivity ntawm lub tshuab nqus tsev.
Cov lus hauv qab no qhia txog qhov sib txawv ntawm dielectric tas li thiab txheeb ze permittivity.
Summary – Dielectric Constant vs Relative Permittivity
Cov ntsiab lus permittivity thiab dielectric tas li yog siv hauv tshuab hluav taws xob capacitor. Qhov sib txawv tseem ceeb ntawm dielectric tas li thiab txheeb ze permittivity yog tias lub sij hawm dielectric tas li yog hais txog qhov txheeb ze permittivity ntawm cov khoom dielectric whereas txheeb ze permittivity yog hais txog qhov permittivity ntawm ib yam khoom piv rau permittivity ntawm lub nqus tsev vacuum.
