I-Barium titanate ayisiyiyo kuphela imveliso yeekhemikhali ezilungileyo ezibalulekileyo, kodwa iye yaba yenye yezinto eziphambili eziyimfuneko kwishishini le-elektroniki.Kwinkqubo ye-BaO-TiO2, ngaphezu kwe-BaTiO3, kukho iikhompawundi ezininzi ezifana ne-Ba2TiO4, i-BaTi2O5, i-BaTi3O7 kunye ne-BaTi4O9 enemilinganiselo eyahlukeneyo ye-barium-titanium.Phakathi kwazo, i-BaTiO3 inelona xabiso likhulu, kwaye igama layo lekhemikhali yi-barium metatitanate, ekwaziwa ngokuba yi-barium titanate.

1. Iimpawu zePhysicochemical ofnano barium titanate(nano BaTiO₃)

1.1.I-Barium titanate i-powder emhlophe ene-melting point malunga ne-1625 ° C kunye nobunzima obuthile be-6.0.Inyibilika kwi-asidi ye-sulfuric egxininisiweyo, i-hydrochloric acid kunye ne-hydrofluoric acid, kodwa ayinyibiliki kwi-hot dilute nitric acid, amanzi kunye ne-alkali.Kukho iintlobo ezintlanu zokuguqulwa kwekristale: i-hexagonal crystal form, i-cubic crystal form, i-tetragonal crystal form, i-trigonal crystal form kunye ne-orthorhombic crystal form.Eyona nto ixhaphakileyo yikristale yesigaba se-tetragonal.Xa i-BaTiO2 iphantsi kwendawo yombane yangoku, isiphumo esiqhubekayo se-polarization siya kwenzeka ngaphantsi kwe-Curie point ye-120 ° C.I-polarized barium titanate ineempawu ezimbini ezibalulekileyo: i-ferroelectricity kunye ne-piezoelectricity.

1.2.I-dielectric constant iphezulu kakhulu, eyenza i-nano barium titanate ibe neepropati ezikhethekileyo ze-dielectric, kwaye ibe yinto eyimfuneko phakathi kwezinto ezijikelezayo eziphezulu.Kwangaxeshanye, umbane owomeleleyo ukwasetyenziswa kwimidiya yokukhulisa, ukumodareyitha rhoqo kunye nezixhobo zokugcina.

1.3.Ine-piezoelectricity elungileyo.I-titanate ye-Barium yeyohlobo lwe-perovskite kwaye ine-piezoelectricity enhle.Ingasetyenziselwa ukuguqulwa kwamandla ahlukeneyo, ukuguqulwa kwesandi, ukuguqulwa kwesignali kunye ne-oscillation, i-microwave kunye neenzwa ezisekelwe kwiisekethe ezilinganayo ze-piezoelectric.amaqhekeza.

1.4.I-Ferroelectricity yimeko efunekayo kubukho bezinye iziphumo.Imvelaphi ye-ferroelectricity ivela kwi-polarization ezenzekelayo.Kwi-ceramics, i-piezoelectric, i-pyroelectric, kunye neempembelelo ze-photoelectric zonke zivela kwi-polarization ebangelwa i-polarization ezenzekelayo, ubushushu okanye indawo yombane.

1.5.Isiphumo esihle se-coefficient yobushushu.Isiphumo se-PTC sinokubangela utshintsho lwesigaba se-ferroelectric-paraelectric kwizinto ngaphakathi koluhlu lwamashumi amadigri aphezulu kunokushisa kweCurie, kunye nokumelana nokushisa kwegumbi kwandisa ngokukhawuleza ngemiyalelo emininzi yobukhulu.Ukuthatha inzuzo yalo msebenzi, izixhobo ze-ceramic ezingevani nobushushu ezilungiselelwe nge-BaTiO3 nano powder ziye zasetyenziswa ngokubanzi kwizixhobo zokhuseleko zefowuni ezilawulwa yinkqubo, iziqalisi zeenjini zemoto, ii-degauss ezizenzekelayo zoomabonakude bemibala, ii-compressor zefriji, izinzwa zobushushu, kunye nezikhuseli zobushushu obugqithisileyo. njl..

2. Ukusetyenziswa kwe-barium titanate nano

I-Barium titanate ngumzimba wesithathu osanda kufunyanwa onamandla wombane emva kwenkqubo yetyuwa ephindwe kabini ye-potassium sodium tartrate kunye nomzimba oqinileyo wombane wenkqubo ye-calcium phosphate.Kuba luhlobo olutsha lomzimba owomeleleyo wombane onganyibilikiyo emanzini kwaye unokumelana nobushushu, unexabiso elibonakalayo, ngakumbi kwitekhnoloji ye-semiconductor kunye neteknoloji yokugquma.

Ngokomzekelo, iikristali zayo zineemilinganiselo eziphezulu ze-dielectric kunye ne-thermal variable parameters, kwaye zisetyenziswa ngokubanzi njenge-volume encinci, i-microcapacitors enkulu kunye namacandelo embuyekezo yeqondo lokushisa.

Ineempawu zombane ezizinzileyo.Ingasetyenziselwa ukwenza amacandelo angabonakaliyo, i-amplifiers ye-dielectric kunye ne-electronic memory memory components (imemori), njl. , kunye neejeneretha ze-ultrasonic.

Ukongeza, inokusetyenziselwa ukwenza iinguqu ze-electrostatic, ii-inverters, i-thermistors, ii-photoresistors kunye nezixhobo zetekhnoloji ye-elektroniki ecwecwe.

Nano barium titanatesesona sixhobo sisisiseko semathiriyeli yeseramikhi yombane, eyaziwa ngokuba yintsika yoshishino lweseramikhi yombane, kwaye yenye yezona zinto zisetyenziswa kakhulu kwaye zibaluleke kakhulu kwiiseramikhi zombane.Okwangoku, isetyenziswe ngempumelelo kwi-PTC thermistors, i-multilayer ceramic capacitors (MLCC), i-pyroelectric element, i-piezoelectric ceramics, i-sonar, i-infrared radiation ye-infrared element, i-crystal ceramic capacitors, iipaneli zokubonisa i-electro-optic, izixhobo zememori, izixhobo ze-semiconductor, i-electrostatic transformers. , i-dielectric amplifiers, ii-frequency converters, iinkumbulo, iicomposites ze-polymer matrix kunye neengubo, njl.

Ngophuhliso lweshishini lombane, ukusetyenziswa kwe-barium titanate kuya kuba kuninzi.

3. Nano barium titanate umenzi-Hongwu Nano

I-Guangzhou Hongwu Material Technology Co., Ltd. inonikezelo lwexesha elide kunye noluzinzileyo lomgangatho ophezulu we-nano barium titanate powders kwiibhetshi ezinamaxabiso akhuphisanayo.Zombini izigaba ze-cubic kunye ne-tetragonal zikhoyo, kunye nobukhulu be-particle 50-500nm.