Barium titanate tsis yog tsuas yog ib qho tseem ceeb ntawm cov khoom lag luam zoo, tab sis kuj tau dhau los ua ib qho ntawm cov khoom tseem ceeb tseem ceeb hauv kev lag luam hluav taws xob.Hauv BaO-TiO2 system, ntxiv rau BaTiO3, muaj ntau lub tebchaw xws li Ba2TiO4, BaTi2O5, BaTi3O7 thiab BaTi4O9 nrog sib txawv barium-titanium ratios.Ntawm lawv, BaTiO3 muaj txiaj ntsig zoo tshaj plaws, thiab nws lub npe tshuaj yog barium metatitanate, tseem hu ua barium titanate.

1. Physicochemical khoom ntawmnano barium titanate(nano BaTiO₃)

1.1.Barium titanate yog cov hmoov dawb nrog lub melting point ntawm txog 1625 ° C thiab lub ntiajteb txawj nqus ntawm 6.0.Nws yog soluble nyob rau hauv concentrated sulfuric acid, hydrochloric acid thiab hydrofluoric acid, tab sis insoluble nyob rau hauv kub dilute nitric acid, dej thiab alkali.Muaj tsib yam kev hloov kho siv lead ua: hexagonal siv lead ua daim ntawv, daim ntawv siv lead ua cubic, tetragonal siv lead ua daim ntawv, trigonal siv lead ua daim ntawv thiab orthorhombic siv lead ua daim ntawv.Feem ntau yog tetragonal theem siv lead ua.Thaum BaTiO2 raug rau qhov hluav taws xob tam sim no, cov nyhuv txuas ntxiv yuav tshwm sim hauv qab Curie point ntawm 120 ° C.Polarized barium titanate muaj ob yam tseem ceeb: ferroelectricity thiab piezoelectricity.

1.2.Lub dielectric tas li yog qhov siab heev, uas ua rau nano barium titanate muaj cov khoom tshwj xeeb dielectric, thiab tau dhau los ua cov khoom siv tsis tseem ceeb hauv nruab nrab ntawm cov khoom siv hluav taws xob ntau zaus.Nyob rau tib lub sijhawm, hluav taws xob muaj zog kuj yog siv hauv kev tshaj tawm xov xwm, kev hloov pauv zaus thiab cov khoom siv cia.

1.3.Nws muaj piezoelectricity zoo.Barium titanate belongs rau perovskite hom thiab muaj piezoelectricity zoo.Nws tuaj yeem siv ntau yam kev hloov pauv hluav taws xob, suab hloov pauv, teeb liab hloov pauv thiab oscillation, microwave thiab sensors raws li piezoelectric sib npaug circuits.daim.

1.4.Ferroelectricity yog qhov tsim nyog rau kev muaj lwm yam teebmeem.Lub hauv paus chiv keeb ntawm ferroelectricity los ntawm spontaneous polarization.Rau cov ceramics, cov teebmeem piezoelectric, pyroelectric, thiab photoelectric txhua yam tshwm sim los ntawm polarization tshwm sim los ntawm tus kheej polarization, kub lossis hluav taws xob.

1.5.Zoo kub coefficient nyhuv.Cov nyhuv PTC tuaj yeem ua rau muaj kev hloov pauv ntawm ferroelectric-paraelectric theem nyob rau hauv cov khoom nyob rau hauv ntau ntawm kaum tawm degrees siab tshaj Curie kub, thiab chav tsev kub resistivity nce sharply los ntawm ob peb txiav txim ntawm magnitude.Ua kom zoo dua ntawm qhov kev ua tau zoo no, cov khoom siv hluav taws xob kub-rhiab ceramic tau npaj nrog BaTiO3 nano hmoov tau siv dav hauv kev tswj hwm xov tooj kev ruaj ntseg cov cuab yeej, lub cav pib pib, tsis siv neeg degaussers rau cov xim TV, pib rau lub tub yees compressors, kub sensors, thiab overheat protectors, lwm..

2. Daim ntawv thov ntawm barium titanate nano

Barium titanate yog qhov thib peb tshiab pom muaj zog lub cev tom qab ob chav ntsev ntawm poov tshuaj sodium tartrate thiab lub zog hluav taws xob lub cev ntawm calcium phosphate system.Vim tias nws yog hom tshiab ntawm lub cev muaj zog hluav taws xob uas yog ob qho tib si tsis muaj dej thiab muaj cua sov zoo, nws muaj txiaj ntsig zoo, tshwj xeeb tshaj yog nyob rau hauv semiconductor technology thiab rwb thaiv tsev tshuab.

Piv txwv li, nws cov crystals muaj qhov siab dielectric tas li thiab thermal hloov pauv tsis tau, thiab tau dav siv los ua cov ntim me me, muaj peev xwm loj microcapacitors thiab cov khoom siv kub kub.

Nws muaj cov khoom siv hluav taws xob ruaj khov.Nws tuaj yeem siv los tsim cov khoom siv tsis-linear, dielectric amplifiers thiab cov khoom siv hluav taws xob hauv computer nco (nco), thiab lwm yam. Nws kuj muaj piezoelectric zog ntawm electromechanical hloov dua siab tshiab, thiab tuaj yeem siv los ua cov khoom siv rau cov khoom siv xws li cov ntaub ntawv cov neeg uas ua ntawv cartridges, cov cuab yeej tshawb nrhiav dej hauv av. , thiab ultrasonic generators.

Tsis tas li ntawd, nws tseem tuaj yeem siv los tsim cov tshuab hluav taws xob electrostatic, inverter, thermistor, photoresistors thiab nyias-film electronic technology Cheebtsam.

Nano barium titanateyog cov khoom siv tseem ceeb ntawm cov khoom siv hluav taws xob ceramic, lub npe hu ua tus ncej ntawm kev lag luam hluav taws xob ceramic, thiab kuj yog ib qho ntawm cov khoom siv dav siv thiab tseem ceeb tshaj plaws hauv cov khoom siv hluav taws xob ceramics.Tam sim no, nws tau ua tiav zoo siv hauv PTC thermistor, multilayer ceramic capacitors (MLCC), pyroelectric hais, piezoelectric ceramics, sonar, infrared radiation detection ntsiab, crystal ceramic capacitors, electro-optic zaub panels, nco cov ntaub ntawv, semiconductor cov ntaub ntawv, electrostatic transformers. , dielectric amplifiers, zaus converters, nco, polymer matrix composites thiab coatings, thiab lwm yam.

Nrog rau txoj kev loj hlob ntawm kev lag luam hluav taws xob, kev siv barium titanate yuav siv ntau dua.

3. Nano barium titanate chaw tsim tshuaj paus-Hongwu Nano

Guangzhou Hongwu Material Technology Co., Ltd. muaj lub sijhawm ntev thiab ruaj khov ntawm cov khoom zoo nano barium titanate hmoov hauv cov khoom sib tw nrog cov nqi sib tw.Ob lub cubic thiab tetragonal theem yog muaj, nrog cov particle loj li ntawm 50-500nm.