I-Ceramic formula powder iyisisetshenziswa esibalulekile se-MLCC, esibalelwa ku-20% ~ 45% wezindleko ze-MLCC. Ikakhulukazi, i-MLCC yomthamo omkhulu inezidingo eziqinile mayelana nokuhlanzeka, usayizi wezinhlayiyana, ubumbudumbudu kanye ne-morphology ye-ceramic powder, kanye nezindleko ze-akhawunti yempuphu ye-ceramic ngenani eliphakeme kakhulu. I-MLCC iyimpushana ye-ceramic kagesi eyakhiwe ngokwengeza izithasiselo eziguquliwei-barium titanate powder, engasetshenziswa ngokuqondile njenge-dielectric ku-MLCC.
Ama-oxide omhlaba angavamileizingxenye ezibalulekile ze-doping ze-MLCC dielectric powders. Nakuba zibala ngaphansi kuka-1% wezinto zokusetshenziswa ze-MLCC, zingadlala indima ebalulekile ekulungiseni izakhiwo zobumba nokuthuthukisa ngempumelelo ukwethembeka kwe-MLCC. Zingenye yezinto ezibalulekile ezibalulekile enqubweni yokuthuthukiswa kwezimpushana zobumba ze-MLCC eziphezulu.
1. Yiziphi izakhi zomhlaba eziyivelakancane? Izakhi zomhlaba ezingavamile, ezaziwa nangokuthi izinsimbi zomhlaba ezingavamile, ziyitemu elivamile lezakhi ze-lanthanide kanye namaqembu ezinto ezingavamile zomhlaba. Zinezakhiwo ezikhethekile ze-elekthronikhi kanye nezakhiwo zomzimba namakhemikhali, futhi izakhiwo zazo eziyingqayizivele zikagesi, ezibonakalayo, kazibuthe, nezishisayo zaziwa njengengcebo yezinto ezintsha.
Izakhi zomhlaba ezingavamile zihlukaniswa zibe: izakhi zomhlaba ezilula ezingavamile (ezinezinombolo ze-athomu ezincane):scandium(Sc),i-yttrium(Y),i-lanthanum(La),i-cerium(Ce),i-praseodymium(Pr),i-neodymium(Nd), i-promethium (Pm),i-samarium(Sm) kanyeeuropium(Eu); izakhi ezisindayo zomhlaba ezingavamile (ezinezinombolo ze-athomu ezinkulu):i-gadolinium(Gd),i-terbium(Tb),i-dysprosium(Dy),i-holmium(Hhawu),i-erbium(Er),thulium(Tm),ytterbium(Yb),i-lutetium(Lu).
Ama-earth oxides asetshenziswa kakhulu kuma-ceramics, ikakhulukazii-cerium oxide, i-lanthanum oxide, i-neodymium oxide, i-dysprosium oxide, i-samarium oxide, i-holmium oxide, i-erbium oxide, njll. Ukwengeza inani elincane noma ukulandelela inani lomhlaba ongavamile kuma-ceramics kungashintsha kakhulu i-microstructure, ukwakheka kwesigaba, ukuminyana, izakhiwo zemishini, izakhiwo ezibonakalayo namakhemikhali kanye nezakhiwo ze-sintering zezinto zobumba.
2. Ukusetshenziswa komhlaba ongavamile ku-MLCCI-Barium titanateingenye yezinto eziphambili zokukhiqiza i-MLCC. I-Barium titanate inezakhiwo ezinhle kakhulu ze-piezoelectric, i-ferroelectric kanye ne-dielectric. I-barium titanate ehlanzekile inomthamo omkhulu wokushisa we-coefficient, izinga lokushisa eliphezulu le-sintering kanye nokulahlekelwa okukhulu kwe-dielectric, futhi ayifanele ukusetshenziswa ngokuqondile ekwenzeni ama-capacitor e-ceramic.
Ucwaningo luye lwabonisa ukuthi izakhiwo ze-dielectric ze-barium titanate zihlobene eduze nesakhiwo sayo se-crystal. Ngokusebenzisa i-doping, isakhiwo sekristalu se-barium titanate singalawulwa, ngaleyo ndlela sithuthukise izakhiwo zayo ze-dielectric. Lokhu ikakhulukazi ngoba i-barium titanate ehlanjululwe kahle izokwakha isakhiwo segobolondo ngemuva kwe-doping, edlala indima ebalulekile ekuthuthukiseni izici zokushisa ze-capacitance.
Ukusebenzisa izakhi zomhlaba ezingavamile esakhiweni se-barium titanate kungenye yezindlela zokuthuthukisa ukuziphatha kwe-sintering nokuthembeka kwe-MLCC. Ucwaningo nge-ion doped barium titanate yomhlaba engavamile lungalandelelwa emuva ekuqaleni kwawo-1960. Ukwengezwa kwama-oxides omhlaba angavamile kunciphisa ukuhamba komoya-mpilo, okungathuthukisa ukuzinza kwezinga lokushisa le-dielectric kanye nokumelana nogesi we-ceramics ye-dielectric, futhi kuthuthukise ukusebenza nokuthembeka kwemikhiqizo. Ama-oxide omhlaba ajwayelekile angeziwe afaka:i-yttrium oxide(Y2O3), i-dysprosium oxide (I-Dy2O3), i-holmium oxide (Ho2O3), njll.
Usayizi werediyasi wama-ion omhlaba angavamile unomthelela obalulekile endaweni ye-Curie peak ye-barium titanate based ceramics. I-Doping yezinto ezingavamile zomhlaba ezine-radii ehlukene ingashintsha imingcele ye-lattice yamakristalu anezinhlaka eziyinhloko zegobolondo, ngaleyo ndlela iguqule izingcindezi zangaphakathi zamakristalu. I-Doping ye-ion yomhlaba engavamile ene-radii emikhulu iholela ekwakhekeni kwezigaba ze-pseudocubic kumakristalu kanye nokucindezeleka okusele ngaphakathi kwamakristalu; Ukwethulwa kwama-ion omhlaba ayivelakancane anerediya encane futhi kukhiqiza ingcindezi yangaphakathi encane futhi kucindezela ukuguqulwa kwesigaba esakhiweni somgogodla wegobolondo. Ngisho namanani amancane ezithasiselo, izici zama-earth oxides angavamile, njengosayizi wezinhlayiyana noma umumo, zingathinta kakhulu ukusebenza kukonke noma ikhwalithi yomkhiqizo. I-MLCC esebenza kahle ihlale ithuthukela ekwenzeni i-miniaturization, ukunqwabelanisa okuphezulu, umthamo omkhulu, ukwethembeka okuphezulu, kanye nezindleko eziphansi. Imikhiqizo esezingeni eliphezulu kakhulu ye-MLCC emhlabeni ingene ku-nanoscale, futhi ama-oxide omhlaba angavamile, njengezakhi ezibalulekile ze-doping, kufanele abe nosayizi wezinhlayiyana ze-nanoscale kanye nokuhlakazeka okuhle kwempushana.
Isikhathi sokuthumela: Oct-25-2024