Usoro seramiiki ntụ ntụ bụ isi akụrụngwa nke MLCC, na-aza 20% ~ 45% nke ọnụ ahịa MLCC. Karịsịa, MLCC nwere ikike dị elu nwere ihe siri ike chọrọ na ịdị ọcha, nha nha, granularity na morphology nke ntụ ntụ seramiiki, yana ọnụ ahịa ntụ ntụ seramiiki na-akwụ ụgwọ maka oke dị elu. MLCC bụ ihe eletrọnịkị seramiiki ntụ ntụ emebere site na ịgbakwunye mgbakwunye gbanwetụrụ nabarium titanate ntụ ntụ, nke enwere ike iji ya ozugbo dị ka dielectric na MLCC.
Okirikiri ụwa dị ụkọbụ akụkụ dị mkpa doping nke MLCC dielectric powders. Ọ bụ ezie na ha na-erughị 1% nke akụrụngwa MLCC, ha nwere ike ịrụ ọrụ dị mkpa n'ịgbanwe ihe ndị dị na seramiiki na imeziwanye ntụkwasị obi nke MLCC nke ọma. Ha bụ otu n'ime akụrụngwa akụrụngwa dị mkpa dị mkpa na usoro mmepe nke ntụ ntụ seramiiki MLCC dị elu.
1. Gịnị bụ ihe ndị dị ụkọ n'ụwa? Ihe ndị na-adịghị ahụkebe nke ụwa, nke a makwaara dị ka ọla ala ndị na-adịghị ahụkebe, bụ okwu izugbe maka ihe ndị lanthanide na otu ndị na-adịghị ahụkebe ụwa. Ha nwere ihe owuwu eletrọnịkị pụrụ iche na ihe anụ ahụ na kemịkal, na ihe ọkụ eletrik ha pụrụ iche, ngwa anya, magnetik na thermal ka a maara dị ka akụ nke ihe ọhụrụ.
E kewara ihe ndị na-adịghị ahụkebe n'ụwa n'ime: ihe ndị na-adịghị ahụkebe ụwa (nwere ọnụọgụ atọm pere mpe):scandium(Sc),yttrium(Y),lanthanum(La),cerium(Ce),praseodymium(Pr),neodymium(Nd), promethium (Pm),samarium(Sm) naeuropium(Eu); ihe ndị dị arọ na-adịghị ahụkebe ụwa (nwere ọnụọgụ atọm buru ibu):gadolinium(Gd),terbium(Tb),dysprosium(Dị),holmium(Hụ),erbium(Ee),thulium(Tm),ytterbium(Yb),lutium(Lu).
A na-eji oxides ụwa na-adịghị ahụkebe eme ihe na seramiki, tumadicerium oxide, lanthanum oxide, neodymium oxide, dysprosium oxide, samarium oxide, holium oxide, erbium oxide, wdg. Ịgbakwunye obere ego ma ọ bụ Chọpụta ego nke ụwa na-adịghị ahụkebe na seramiki nwere ike gbanwee microstructure, nhazi nke oge, njupụta, ihe eji arụ ọrụ, ihe anụ ahụ na nke kemịkal na ihe ndị na-emepụta ihe nke seramiiki.
2. Ngwa nke obere ụwa na MLCCBarium titanatebụ otu n'ime akụrụngwa akụrụngwa maka imepụta MLCC. Barium titanate nwere ezigbo piezoelectric, ferroelectric na dielectric Njirimara. Barium titanate dị ọcha nwere ọnụ ọgụgụ dị ukwuu nke okpomọkụ, okpomọkụ dị elu na nnukwu ọnwụ dielectric, ọ dịghịkwa mma maka iji ya mee ihe ozugbo na mmepụta nke seramiiki capacitors.
Nchọpụta egosila na ihe dielectric nke barium titanate nwere njikọ chiri anya na nhazi kristal ya. Site na doping, enwere ike ịhazi usoro kristal nke barium titanate, si otú a na-emeziwanye ihe dielectric ya. Nke a bụ n'ihi na barium titanate dị mma ga-etolite usoro shea-isi mgbe emechara doping, nke na-arụ ọrụ dị mkpa n'ịkwalite njirimara okpomọkụ nke capacitance.
Ime ihe ndị na-adịghị ahụkebe n'ụwa n'ime ihe owuwu barium titanate bụ otu n'ime ụzọ isi melite omume nrụrụaka na ntụkwasị obi nke MLCC. Enwere ike ịchọta nchọpụta banyere ion doped barium titanate na mmalite 1960. Mgbakwunye nke oxides ụwa na-adịghị ahụkebe na-ebelata mmegharị nke ikuku oxygen, nke nwere ike ịkwalite nkwụsi ike dielectric okpomọkụ na nguzogide eletriki nke ceramics dielectric, ma melite arụmọrụ na ntụkwasị obi nke ngwaahịa. Oxide ụwa na-adịkarị ụkọ gụnyere:yttrium oxide(Y2O3), dysprosium oxide (Dy2O3), holium oxide (Ho2O3), wdg.
Ogo radius nke ion ụwa na-adịghị ahụkebe nwere mmetụta dị oke mkpa na ọnọdụ Curie peak nke barium titanate based ceramics. Doping nke ihe ndị na-adịghị ahụkebe nke nwere radis dị iche iche nwere ike ịgbanwe akụkụ nke kristal nwere ihe mkpuchi shei, si otú ahụ gbanwee nrụgide dị n'ime kristal. Doping nke ion ụwa na-adịghị ahụkebe nwere nnukwu radius na-eduga n'ịmepụta usoro pseudocubic na kristal na nrụgide fọdụrụnụ n'ime kristal; Iwebata ion ụwa na-adịghị ahụkebe nwere obere radii na-ebutekwa nrụgide dị n'ime ahụ na-ebelata ma na-egbochi mgbanwe oge na nhazi isi shei. Ọbụlagodi na enwere ntakịrị ihe mgbakwunye, njirimara nke oxides ụwa na-adịghị ahụkebe, dịka nha ma ọ bụ udi, nwere ike imetụta arụmọrụ ma ọ bụ ịdịmma nke ngwaahịa ahụ nke ukwuu. MLCC dị elu na-emepe emepe mgbe niile n'ebe miniaturization, nnukwu stacking, nnukwu ikike, ntụkwasị obi dị elu, na ọnụ ala dị ala. Ngwaahịa MLCC kacha mma n'ụwa abanyela na nanoscale, na ikuku oxides ụwa dị ụkọ, dị ka ihe dị mkpa doping, kwesịrị inwe nha nanoscale na ezigbo mgbasa.
Oge nzipu: Ọkt-25-2024