Cov yam ntxwv ntawm piezoelectric ceramics thiab cov nyhuv piezoelectric
Ceramics uas muaj" piezoelectric nyhuv" ntawm ultrasonic transducers hu ua piezoelectric ceramics. Piezoelectric ceramics feem ntau yog tsim los ntawm cov tshuaj lom neeg nyob nruab nrab ntawm ob peb oxidizing tebchaw lossis carbonic acid sib xyaw thaum lub sijhawm ua haujlwm sintering. Cov txheej txheem tsim tawm yog zoo ib yam li cov khoom siv hluav taws xob zoo nkauj thawb twj paj nruag.
Piezoelectric ceramics yog qhov kev xaiv zoo dua rau kev hloov ultrasonic vim lawv lub zog muaj zog, tshuaj tsis muaj zog thiab tus nqi tsim khoom pheej yig. Piezoelectric ceramics tuaj yeem siv los ua cov khoom xws li ultrasonic transducers, ceramic capacitors, sensors thiab actuators.
Cov yam ntxwv ntawm piezoelectric ceramics
Piezoelectric ceramics yog cov txiv neej ua piezoelectric cov ntaub ntawv. Cov khoom siv Piezoelectric yog cov ntaub ntawv uas tuaj yeem tsim hluav taws xob vim muaj kev ntxhov siab hauv tshuab. Thaum tus xaim hluav taws xob tau thov, cov khoom siv piezoelectric deforms. Txhua cov ntaub ntawv piezoelectric tsis muaj kev coj ua zoo kom thiaj li tsim lub zog piezoelectric thiab ua haujlwm.
Piezoelectric ceramics tsim kom muaj qhov hluav taws xob sib xyaw rau cov ntawv thov kev siv tshuab kev ntxhov siab. Feem ntau siv los ua lub zog siv hluav taws xob, roj zais pa thiab ntsuas kom pom lub siab, ua kom nrawm thiab lub nrawm.
Piezoelectric ceramics tsim kev xa xov coj tawm coj mus rau qhov thov siv hluav taws xob. Qhov no feem ntau siv rau kev ntsuas kab tawm ncaj ncees xws li piezoelectric injectors, nano-kev tso chaw thiab kev tiv thaiv kev co. Piv nrog rau cov hluav taws xob hauv tshuab hluav taws xob thiab hydraulic, piezoelectric ceramics muaj qhov zoo ntawm cov lus teb ceev ceev, kev kub siab thiab kev ua haujlwm ncaj.
Piezoelectric ceramics muaj lub ntuj deeg siab ua raws li cov duab thiab qhov loj. Thaum hluav taws xob teb nrog qee qhov zaus (hu ua resonant zaus) yog thov, cov piezoelectric ceramic yuav co nrog qhov kom muaj zog, yog li qhia qhov tam sim no ntau. Cov yeeb yam no yog siv hauv ultrasonic vibrators, xws li tshuab ntxhua khaub ncaws, humidifiers, sonar, hluav taws xob teeb liab lim thiab ultrasonic motors.
Piezoelectric ceramic cov ntaub ntawv
Cov ntaub ntawv xws li barium titanate, txhuas zirconate titanate thiab lithium niobate yog cov khoom siv tseem ceeb rau ua piezoelectric ceramics. Lawv yog qee cov ntaub ntawv hluavtaws thiab tau muab pov thawj kom muaj lub zog loj dua qhov muaj peev xwm ntau dua li cov khoom siv ntuj. Hmoov txhuas zirconate titanate (PZT) yog cov khoom siv tseem siv tshiab tshaj plaws rau kev ua cov piezoelectric ceramics. Nws yog tsim thiab tsim los ntawm ob qho tshuaj lom neeg (ntawm qhov kub siab), txhuas thiab zirconium.
Piezoelectric ceramic daim ntawv rau cov hloov pauv
PZT ceramics muaj qhov kub siab dua thiab ua haujlwm siab dua dua li lwm cov piezoelectric ceramics. Qhov txawv ntawm PZT yog nws cov piezoelectricity loj. PZT muaj perovskite-hom siv lead ua qauv, uas tsim nyog rau kev ua tiav qhov loj piezoelectricity. Ntxiv rau, cov haujlwm tuaj yeem txhim kho los ntawm kev ua kom zoo.
Cov nyhuv Piezoelectric
Cov neeg tsis paub meej muaj peev xwm sib sau ua ke ua cov ntaub ntawv piezoelectric. Cov qauv ntawm cov muaju hauv cov hluav taws xob no tsis zoo sib xws, tab sis lawv tseem muaj nyob rau hauv qhov ntsuas hluav taws xob tsis sib npaug. Txawm li cas los xij, ib zaug cov neeg kho tshuab siab siv rau cov khoom qab zib piezoelectric, lawv cov qauv yuav hloov kho thiab cov atoms yuav raug thawb los tsim cov muaju uas tuaj yeem ua tam sim no. Yog tias koj siv tib lub piezoelectric siv lead ua thiab siv hluav taws xob rau nws, cov siv lead ua yuav nthuav dav thiab sib cog lus, yog li hloov lub zog hluav taws xob rau hauv lub zog hluav taws xob.
Piezoelectric ceramics yog cov khoom siv piezoelectric thiab muaj" cov nyhuv piezoelectric" cov ntaub ntawv piezoelectric feem ntau muaj. Cov nyhuv piezoelectric yog tshwm sim los ntawm txoj kab nruab nrab ntawm kev sib hloov ntawm lub tshuab hluav taws xob thiab lub xeev hluav taws xob hauv cov khoom siv siv lead ua. Cov nyhuv piezoelectric tau muab faib ua cov ncaj piezoelectric thiab rov qab nyhuv piezoelectric. Lub piezoelectric nyhuv yog thim rov qab. Thaum ib qho me me sab nraud quab yuam ua rau nws, nws tuaj yeem hloov cov khoom siv tshuab ua lub zog hluav taws xob. Thaum ib qho AC voltage tau thov nruab nrab ntawm cov piezoelectric ceramic daim ntawv pawg, hluav taws xob lub zog yuav raug rau hauv kev hloov kho lub zog.
Ncaj qha piezoelectric nyhuv
Cov nyhuv piezoelectric ncaj qha yog tshwm sim los ntawm kev ntxhov siab ncaj qha rau cov khoom. Qhov no tshwm sim thaum ob daim hlau hlau feem ntau yog siv los siv lub siab rau ib daim ntawm cov khoom siv piezoelectric (xws li siv lead ua los yog cov nplais me me). Cias tso cov khoom siv hluav taws xob piezoelectric siv nruab nrab ntawm ob daim hlau, thaum lub sijhawm no, cov khoom siv tau zoo kawg nkaus thiab tsis muaj qhov tam sim no. Thaum cov hlau phaj siv lub tshuab ua kom siab rau cov khoom siv, thaum siv lead ua cuam tshuam los ntawm kev nyuaj siab lossis lwm yam kev ntxhov siab, qhov nqi tsis txaus yuav ua rau muaj kev sib txawv. Ntau cov nqi tsis zoo thiab qhov zoo tshwm sim ntawm sab nraud ntawm lub ntsej muag siv lead ua. Lub phaj hlau sau cov nqi no, uas tuaj yeem siv los tsim hluav taws xob thiab xa tawm tam sim no los ntawm Circuit Court. Txoj kev no yog cov nyhuv piezoelectric ncaj qha.
Rov qab piezoelectric siv
Lub tso kua mis piezoelectric tso rau nruab nrab ntawm ob daim hlau, thiab cov qauv siv lead ua muaj nyob hauv kev tshuav zoo meej tsis muaj kev hloov pauv. Thaum lub zog hluav taws xob tau thov rau lub iav ci, tus qauv ntawm lub iav tau cog lus thiab nthuav dav. Raws li cov qauv siv lead ua nthuav dav thiab sib cog lus, nws hloov lub zog tau txais hluav taws xob thiab tso cov zog hluav taws xob hauv daim ntawv ntawm lub suab tsis. Cov tam sim no yuam cov atoms hauv cov khoom siv kom co rov qab thiab dua. Txoj kev no yog hu ua cov nyhuv piezoelectric. Cov nyhuv piezoelectric thim rov qab pab tsim cov khoom siv uas tsim cov suab sib txuam, xws li cov hais lus thiab cov suab nrov.
Raws li lub hauv paus tseem ceeb ntawm cov ultrasonic transducer, cov piezoelectric ceramic ntawm PZT-8 muaj cov khoom lag luam zoo dua Qm, kev ua haujlwm siab dua (Kub Txias Tshaj) thiab qis dua dielectric poob (tanδ). Qhov no tseem tuaj yeem lav nws lub siab electromechanical hloov dua siab tshiab kev ua haujlwm thiab ruaj khov.
