Ceramic formula powder ndiyo yakakosha zvinhu zveMLCC, inoverengera 20% ~ 45% yemutengo weMLCC. Kunyanya, yepamusoro-inokwana MLCC ine yakasimba zvinodiwa pakuchena, particle size, granularity uye morphology yedongo rehupfu, uye mutengo wedongo redongo remaakaunti kune chikamu chepamusoro. MLCC ndeyemagetsi ceramic poda zvinhu inogadzirwa nekuwedzera yakagadziridzwa additives kunebarium titanate poda, iyo inogona kushandiswa zvakananga se dielectric muMLCC.
Rare earth oxideszvakakosha doping zvikamu zveMLCC dielectric powders. Kunyangwe vachiverengera isingasviki 1% yeMLCC mbishi zvinhu, vanogona kuita basa rakakosha pakugadzirisa ceramic zvinhu uye zvinobudirira kuvandudza kuvimbika kweMLCC. Ndiyo imwe yezvakakosha zvakakosha mbishi zvinhu mukuvandudza maitiro epamusoro-kuguma MLCC zvedongo poda.
1. Ndezvipi zvinhu zvepasi zvisingawanzoitiki? Rare Earth elements, inozivikanwawo sezvisingawanzo simbi dzepasi, ishoko rinowanzoreva lanthanide zvinhu uye zvisingawanzo pasi emapoka mapoka. Ivo vane zvakakosha zvemagetsi zvimiro uye zvemuviri uye zvemakemikari zvimiro, uye yavo yakasarudzika yemagetsi, yekuona, magineti, uye yekupisa zvimiro zvinozivikanwa sepfuma yezvigadzirwa zvitsva.
Zvinhu zvisingawanzoitiki zvepasi zvakakamurwa kuita: chiedza chisingawanzoitiki zvinhu zvepasi (zvine nhamba diki dzeatomu):scandium(Sc),yttrium(Y),lanthanum(La),cerium(Ce),praseodymium(Pr),neodymium(Nd), promethium (Pm),samarium(Sm) uyeeuropium(Eu); zvinorema zvisingawanzo zvinhu zvepasi (zvine nhamba huru dzeatomu):gadolinium(Gd),terbium(Tb),dysprosium(Dy),holmium(Ho),erbium(Er),thulium(Tm),ytterbium(Yb),lutetium(Lu).
Rare earth oxides anoshandiswa zvakanyanya mu ceramics, kunyanyacerium oxide, lanthanum oxide, neodymium oxide, dysprosium oxide, samarium oxide, holmium oxide, erbium oxide, etc. Kuwedzera zvishoma kana kutsvaga huwandu hwepasi isingawanzoitiki kune ceramics inogona kuchinja zvikuru microstructure, chikamu chekuumbwa, density, mechanical properties, muviri uye makemikari ehupfumi uye sintering zvinhu zveceramic zvinhu.
2. Kushandiswa kwenyika isingawanzoitiki muMLCCBarium titanatendechimwe chezvinhu zvakakosha zvekugadzira MLCC. Barium titanate ine yakanakisa piezoelectric, ferroelectric uye dielectric zvivakwa. Pure barium titanate ine yakakura kugona tembiricha coefficient, yakakwirira sintering tembiricha uye hombe dielectric kurasikirwa, uye haina kukodzera kushandiswa zvakananga mukugadzirwa kweceramic capacitors.
Tsvagiridzo yakaratidza kuti dielectric zvimiro zvebarium titanate zvine hukama nekristaro yayo. Kuburikidza nedoping, chimiro chekristaro chebarium titanate chinogona kudzorwa, nekudaro ichivandudza dielectric yayo. Izvi zvinonyanya nekuti yakanaka-grained barium titanate ichagadzira shell-core chimiro mushure me doping, iyo inobata basa rakakosha mukuvandudza tembiricha maitiro e capacitance.
Doping zvisingawanzo pasi zvinhu mu barium titanate chimiro ndiyo imwe yenzira dzekuvandudza hunhu hwekutadza uye kuvimbika kweMLCC. Tsvagiridzo pane isingawanzo pasi ion doped barium titanate inogona kurondwa kumashure kwekutanga 1960s. Kuwedzerwa kweasingawanzo pasi oxides kunoderedza kufamba kweokisijeni, iyo inogona kusimudzira kugadzikana kwedielectric tembiricha uye kuramba kwemagetsi kwe dielectric ceramics, uye kunatsiridza mashandiro uye kuvimbika kwezvigadzirwa. Kazhinji akawedzera rare Earth oxides anosanganisira:yttrium oxide(Y2O3), dysprosium oxide (Dy2O3), holmium oxide (Ho2O3), nezvimwewo.
Iyo radius saizi yeasingawanzo pasi ion ine kukosha kwakakosha pachinzvimbo cheCurie peak yebarium titanate based ceramics. Doping yezvisingawanzo zvinhu zvepasi zvine radii dzakasiyana zvinogona kushandura iyo lattice paramita yekristaro ine shell core zvimiro, nekudaro ichichinja kushushikana kwemukati kwemakristasi. Doping yeasingawanzo pasi ion ane radii yakakura inotungamirira pakuumbwa kwepseudocubic phases mumakristasi uye zvakasara zvinonetsa mukati memakristasi; Kuunzwa kweasingawanzo pasi ion ane diki radii zvakare inoburitsa kushoma kwemukati kusagadzikana uye inodzvanya shanduko yechikamu mugoko repakati chimiro. Kunyangwe nezvidiki zvidiki zvekuwedzera, hunhu hweasingawanzo pasi oxides, senge particle size kana chimiro, inogona kukanganisa zvakanyanya kuita kwese kana kunaka kwechigadzirwa. High performance MLCC inogara ichikura yakanangana neminiaturization, yakakwira stacking, hukuru hukuru, kuvimbika kwakanyanya, uye mutengo wakaderera. Zvigadzirwa zveMLCC zvepasi rose zvakapinda mune nanoscale, uye zvisingawanzo pasi oxides, sezvinhu zvakakosha zvedoping, zvinofanirwa kunge zvine nanoscale particle size uye yakanaka kupararira kwehupfu.
Nguva yekutumira: Oct-25-2024