Lithium niobate siv lead ua yog cov khoom siv piezoelectric zoo heev nrogcov khoom nram qab no:High Curie kub, tsis tshua muaj kub coefficient ntawm piezoelectric nyhuv, siab electromechanical coupling coefficient, tsis tshua muaj dielectric poob, ruaj khov lub cev thiab tshuaj zog, kev ua tau zoo, thiab yooj yim los npaj loj loj thiab zoo siv lead ua.Piv nrog rau feem ntau siv piezoelectric siv lead ua quartz,LNsiv lead uamuaj siab duasuab nrawmraukev npaj ntawm cov khoom siv ntau zaus, yog li tuaj yeem siv tauuaresonator, transducer, ncua kab, lim, thiab lwm yam.. uas muaj nrov heev daim ntawv thov nyob rau hauv pej xeem cheeb tsam ntawmmobile kev sib txuas lus, satellite kev sib txuas lus, cov teeb liab ua, TV, xov tooj cua, radar, tej thaj chaw deb sensing,thiab thaj chaw tub rog ntawm hluav taws xobcountermeasures, fuze, qhia,lwm..

Qhov dav tshaj plawsKev siv ntawm LN Crystalyog lub ntsej muag acoustic yoj lim (SAWF).Txij li xyoo 1970,midfrequency SAWF ua los ntawm LNsiv lead ua tau siv dav hauv cov xim TV, xov tooj cordless, hluav taws xob tej thaj chaw deb tswj, thiab lwm yam. Nyob rau hauv 2010, nrog rau daim ntawv thov ntawm silicon tuner integrated chips, IF nto yoj lim hauv TV teeb tau pib thim tawm ntawm kev ua lag luam.STxij li thaum xyoo 1980s, kev sib txuas lus ntawm tes tau hloov ntawm 2G mus rau 5G, thiab lub davhlau ya nyob twg yuav tsum rov qab sib raug zoo,cov no coj asurge nyob rau hauv kev thov rauSAWF. Yog each zaus band xav tausob lim, txhua lub xov toojyuavxav tau ntau tshaj ib puasSAWF. Most uase SAWF yog tsim los ntawm LN orlithium roj teebiua crystal. LN siv lead ua yog nrov dua hauv SAWF li nrogkub them nyiajDesign (TCAW).

Rau kev siv piezoelectric, muaj pes tsawg leeg ntawmLNCrystal muaj kev cuam tshuam zoo rau lub suab nrawm, thiab nws qhov kev hloov pauv yuav tsum tau tswj nruj me ntsis. Because Curie kub yog rhiab heev rau crystal muaj pes tsawg leeg, yog liitfeem ntau yog siv los qhia qhov sib xws ntawm crystal muaj pes tsawg leeg.Tsis tas li ntawd, ib qho ntawm cov khoom siv lead ua yuav cuam tshuam ncaj qhanwspiezoelectric zog.Tyog li ntawd,tus yuam sijtxujical specifications ntawm LN crystals siv nyob rau hauv piezoelectric cov cuab yeej suav nrogeCurie kub,monopole cov cai,thiab internal scattering hais,thiab lwm yam .. Nyob rau hauv lub crystal, covmechanical yojs nrog ntev wavelength tsis rhiab raucov lattice defectsuas yog hauv qhov ntsuasdeb me dua lub wavelength. LN crystals uas ua tau raws li qhov yuav tsum tau muajpiezoelectric sivdaim ntawv thov yoghu ua "acousticqib LNsiv lead ua".

Qhov kev txiav txim siab ntawm qib acousticLNsiv lead ua muaj feem raunwsdaim ntawv thov tshwj xeeb.Y-axis txiavLNCrystal muaj siab electromechanical coefficient, tab sismuaj tsawgdaim ntawv thov vim qhov excitation ntau dhau ntawm tus neeg txais nthwv dej.Lub <1014> txiav siv lead ua muaj tsawg lub cev yoj excitation thiab yog siv ntau dua(TCSAW yog ib qho piv txwv). Nyob rau hauv lub orientation ntawm<1014>, Y-axistigrov 127.86° ibpuag ncig lub X-axis.Cov LN crystals no yogfeem ntau hu ua 128 ° YLNsiv lead ua.Ntxiv rau,LNsiv lead uas nrog txiav lub kaum sab xis64 ° Y thiab 41 ° Yyogtsim nyog rau kev npaj cov khoom siv ntau zaus.Tam sim no,qhov loj ntawmpiezoelectric sivLN siv lead uatau mus txog 6 nti.

Tsis tas li ntawd, Lewis qhia txog kev cuam tshuam ntawm pyroelectric nyhuv ntawmLNsiv lead ua ntawm kev npaj ntawm nto acoustic yoj cov cuab yeej hauv xyoo 1982, thiab pom tias cov nyhuv pyroelectric ntawmLNsiv lead ua ua rau kev puas tsuaj ntawm electrode thiab siv lead ua, uas tuaj yeem cuam tshuam los ntawm kev siv cov txheej txheem ntawm cov hlau tsis muaj zog luv-circuit electrode.Xyoo 1998, Standifer et al.tau txais txoj kev kho tshuaj txo cov tshuaj kom nce lub teeb nqus ntawmLNsiv lead ua los ntawm 1000 zaug, txhim kho qhov raug zoo ntawm cov kab nqaim thiab zoo dua thaum lub sijhawm photolithography, thiab ua kom cov siv lead ua kom zoo dua.sconductivity los ntawm ntau tshaj1× 10⁵ sij hawm.Txoj kev notxwvskev puas tsuaj ntawm tus ntoo khaub lig ntiv tes electrodestshwm sim los ntawm cov nyhuv pyroelectric nyob rau hauv cov txheej txheem kev kho cua sov ntawmtusnto acoustic wave devices.CovLNwafer npaj los ntawm txoj kev no yog hu ua "dub LN”uastau siv dav hauvSAWF.

Zoo LN crystals ua nyob rau hauv lub tsev ntawm WISOPTIC (www.wisoptic.com)