Lub hauv paus ntsiab lus ntawm piezoelectric ceramic daim ntawv: Thaum siab lossis nro siv rau daim ntawv ceramic, cov nqi ntawm qhov txawv polarity yuav tsim tawm ntawm ob xaus ntawm cov ntawv ceramic, thiab ib qhov tam sim no yog tsim los ntawm Circuit Court. Cov nyhuv no hu ua cov nyhuv piezoelectric. Yog hais tias lub tshuab hloov ua los ntawm cov piezoelectric ceramic tau tso rau hauv dej, tom qab ntawd los ntawm qhov kev txiav txim ntawm lub suab yoj, kev tsub yuav tawm ntawm ob qho kawg ntawm lub tshuab hloov tsheb, uas yog lub suab txais. Txuas ntxiv, cov nyhuv piezoelectric yog thim rov qab. Yog tias daim teb hluav taws xob hloov siv rau hauv piezoelectric ceramic daim ntawv, cov ntawv ceramic yuav ua nyias thiab tuab dua los ntawm ib ntus dhau ib ntus, thiab nws yuav co thiab ua suab nrov. Yog li no, cov teeb meem ntawm ultrasonic transmitter yog daws tau.
Muaj ob cov ntaub ntawv rau piezoelectric ceramic hloov khoom: cov hlau nplaum sib zog thiab cov piezoelectric ceramics. Lub hom phiaj ntawm tsab xov xwm no yog tsim cov hloov pauv rau high-power mechanical ultrasonic machining, yog li tsuas yog piezoelectric ceramic transducers tau sib tham. Raws li hom kev xa hluav taws xob xaib, piezoelectric ceramic transducer muaj cov teeb meem ntawm lub zog hloov dua siab tshiab. Qhov hloov pauv hloov pauv muaj feem xyuam rau kev xaiv hloov ntawm cov khoom hloov, daim ntawv ntawm kev vibration, qauv ntawm cov qauv siv tshuab kev co (nrog rau kev txhawb nqa) thiab qhov ua haujlwm zaus. Yog li ntawd, hauv kev tsim ntawm ultrasonic transducers, ntau yam yuav tsum tau txiav txim siab, xws li acoustic impedance, zaus teb, impedance txuam, acoustic qauv, kev co kev hloov pauv thiab cov ntaub ntawv hloov dua siab tshiab, thiab yuav ua li cas tsim qauv thiab koom ua ke ntawm cov xwm txheej no kom tau txais kev hloov pauv electro-acoustic. zoo tshaj tus nqi.
Piezoelectric ceramic transducer yog cov khoom siv hluav taws xob tej hub hluav taws xob nrog cov yam ntxwv piezoelectric. Lub ntsiab sib txawv ntawm cov raug piezoelectric quartz siv lead ua uas tsis muaj cov khoom siv ferroelectric yog qhov tseem ceeb ntawm cov qib siv lead ua yog tag nrho ferroelectric crystal nplej. Vim tias ceramics yog polycrystalline sib xyaw nrog kev sib xyaw ua kom sib xyaw muaj txiaj ntsig, qhov tshwm sim muaj qhov tshwj xeeb polarization vector ntawm txhua qhov kev cog qoob loo tseem tsis yooj yim. Txhawm rau kom cov ceramic ua kom pom qhov loj me me piezoelectric cov yam ntxwv, cov piezoelectric ceramic yuav tsum tau polarized nyob rau hauv lub zog hluav taws xob DC tom qab tua, thiab lub ntsej muag kawg tau raug rau ntau cov electrodes, kom lub polarization vector ntawm tus thawj tsis sib haum xeeb yog qhov tshwj xeeb kev taw qhia hauv cov kev taw qhia ntawm lub thawv hluav taws xob. Tom qab daim teb hluav taws xob raug tshem tawm, Cov piezoelectric ceramic tom qab polarization kho yuav tuav qee yam macroscopic residual polarization lub zog, kom lub ceramic muaj qee qhov siab.
