Qhov sib txawv tseem ceeb ntawm piezoelectric thiab piezoresistive yog tias piezoelectric hais txog qhov muaj hluav taws xob polarization uas tshwm sim los ntawm kev siv cov tshuab kev ntxhov siab, qhov piezoresistive yog hais txog qhov muaj kev hloov pauv hauv hluav taws xob tiv thaiv ntawm ib lub semiconductor thaum siv tshuab strain.
Piezoelectricity yog cov nqi hluav taws xob uas sib sau hauv qee cov khoom siv, suav nrog cov muaju, qee hom ceramic, thiab cov khoom siv lom neeg, uas suav nrog cov pob txha, DNA, thiab cov proteins. Piezoresistive effect yog qhov txawv ntawm qhov tshwm sim no.
YPiezoelectric yog dab tsi?
Piezoelectric hais txog qhov muaj hluav taws xob polarization uas tshwm sim los ntawm kev siv cov khoom siv dag zog. Qhov tshwm sim no hu ua piezoelectricity. Piezoelectricity yog cov nqi hluav taws xob uas sib sau ua ke hauv qee cov khoom siv suav nrog, muaju, qee hom ceramic, thiab cov khoom siv roj ntsha uas suav nrog cov pob txha, DNA, thiab cov proteins. Qhov sib txuam ntawm cov nqi hluav taws xob no tshwm sim raws li cov lus teb rau kev siv tshuab kev ntxhov siab. Nyob rau hauv lwm yam lus, lub piezoelectricity yog hluav taws xob uas los ntawm lub siab thiab latent tshav kub.
Daim duab 01: Ib qho Piezoelectric Balance
Feem ntau, cov nyhuv piezoelectric los ntawm cov kab hluav taws xob sib cuam tshuam ntawm cov khoom siv hluav taws xob thiab hluav taws xob nyob rau hauv cov ntaub ntawv crystalline uas tsis muaj qhov sib txawv. Ntxiv mus, cov nyhuv piezoelectric tuaj yeem raug txheeb xyuas raws li cov txheej txheem thim rov qab. Hauv lwm lo lus, cov ntaub ntawv uas tuaj yeem pom cov nyhuv piezoelectric kuj tuaj yeem qhia qhov thim rov qab ntawm cov nyhuv piezoelectric. Cov txheej txheem thim rov qab yog lub cim tsim sab hauv ntawm cov khoom siv hluav taws xob uas los ntawm cov khoom siv hluav taws xob.
Thaum xav txog keeb kwm ntawm cov nyhuv no, nws tau pom thawj zaug los ntawm Fab Kis tus kws kho mob Jacques thiab Pierre Curie xyoo 1880. Txij thaum ntawd los, cov nyhuv no tau muaj ntau yam kev siv, suav nrog kev tsim khoom thiab tshawb pom lub suab, inkjet luam ntawv, tiam. ntawm high voltage hluav taws xob, microbalances, thiab lwm yam.
Piezoresistive yog dab tsi?
Piezoresistive yog hais txog qhov muaj qhov hloov pauv ntawm cov hluav taws xob tiv thaiv hluav taws xob ntawm cov khoom siv hluav taws xob thaum siv cov khoom siv tshuab. Qhov no yog qhov opposite ntawm cov nyhuv piezoelectric. Nws tuaj yeem ua rau muaj kev hloov pauv hauv hluav taws xob nkaus xwb (tsis yog hauv qhov hluav taws xob muaj peev xwm). Cov nyhuv piezoresistive tau pom thawj zaug los ntawm Tswv Kelvin hauv xyoo 1856 siv cov khoom siv meta raws li daim ntawv thov ntawm cov khoom siv thauj khoom.
Nyob rau hauv cov conductors thiab semiconductors, kev hloov ntawm inter-atomic spacing los ntawm cov strain effect ntawm bandgaps, uas ua rau nws yooj yim rau cov electrons txav mus rau lub conduction band. Qhov kev txav no ua rau muaj kev hloov pauv ntawm cov khoom siv.
Feem ntau, piezoresistivity nyob rau hauv cov hlau tshwm sim vim qhov kev hloov ntawm geometry, uas yog los ntawm daim ntawv thov ntawm mechanical stress. Txawm hais tias cov nyhuv piezoresistive hauv qee cov ntaub ntawv me me, nws tsis tsim nyog. Peb tuaj yeem suav cov txiaj ntsig piezoresistive siv cov kab zauv hauv qab no, uas yog muab los ntawm Ohm txoj cai.
Nyob rau hauv kab zauv saum toj no, R yog qhov tsis kam, yog qhov resistivity, l yog tus neeg xyuas pib ntev, thiab A yog qhov chaw hla ntawm qhov ntws tam sim no.
Qhov txawv ntawm Piezoelectric thiab Piezoresistive yog dab tsi?
Piezoelectric thiab piezoresistive yog cov ntsiab lus uas sib txawv rau ib leeg. Qhov sib txawv tseem ceeb ntawm piezoelectric thiab piezoresistive yog tias piezoelectric hais txog qhov muaj hluav taws xob polarization uas tshwm sim los ntawm kev siv cov kev ntxhov siab ntawm cov neeg kho tshuab, whereas piezoresistive yog hais txog qhov muaj kev hloov pauv hauv hluav taws xob tiv thaiv ntawm ib lub semiconductor thaum siv cov khoom siv tshuab.
Cov lus hauv qab no qhia txog qhov sib txawv ntawm piezoelectric thiab piezoresistive.
Summary – Piezoelectric vs Piezoresistive
Piezoelectric thiab piezoresistive yog cov ntsiab lus uas sib txawv rau ib leeg. Qhov sib txawv tseem ceeb ntawm piezoelectric thiab piezoresistive yog tias piezoelectric txhais tau hais tias muaj hluav taws xob polarization uas tshwm sim los ntawm kev siv cov tshuab kev ntxhov siab, thaum piezoresistive txhais tau tias muaj kev hloov pauv hauv hluav taws xob tiv thaiv ntawm ib qho semiconductor thaum siv cov khoom siv tshuab.
