I-powder ye-Ceramic ye-powder yinto ephambili ye-MLCC, i-akhawunti ye-20% ~ 45% yeendleko ze-MLCC. Ngokukodwa, i-MLCC ephezulu yomthamo ineemfuno ezingqongqo kubunyulu, ubungakanani besuntswana, i-granularity kunye ne-morphology ye-ceramic powder, kunye neendleko ze-akhawunti ye-ceramic powder yomlinganiselo ophezulu. I-MLCC yimathiriyeli ye-ceramic yomgubo eyenziwe ngokongeza izongezo ezilungisiweyobarium titanate powder, enokusetyenziswa ngokuthe ngqo njenge-dielectric kwi-MLCC.
Iioksidi zomhlaba ezinqabileyozizinto ezibalulekileyo ze-doping ze-MLCC ze-dielectric powders. Nangona babala ngaphantsi kwe-1% yezinto eziluhlaza ze-MLCC, banokudlala indima ebalulekileyo ekulungiseni iipropati ze-ceramic kunye nokuphucula ngokufanelekileyo ukuthembeka kwe-MLCC. Zezinye zezinto ezibalulekileyo eziyimfuneko ekuphuhlisweni kwe-MLCC yomgubo we-ceramic ephezulu.
1. Ziziphi izinto ezinqabileyo zomhlaba? Izinto zomhlaba ezinqabileyo, ezikwabizwa ngokuba ziintsimbi zomhlaba ezinqabileyo, ligama eliqhelekileyo lezinto ze-lanthanide kunye namaqela anqabileyo omhlaba. Banezakhiwo ezikhethekileyo ze-elektroniki kunye neempawu zomzimba kunye neekhemikhali, kunye neempawu zabo ezizodwa zombane, i-optical, magnetic, kunye ne-thermal zaziwa njenge-treasure trove yezinto ezintsha.
Iziqalelo zomhlaba ezinqabileyo zohlulwe zibe: iziqalelo zomhlaba ezinqabileyo ezikhanyayo (ezinamanani amancinci eathom):scandium(Sc),iyttrium(Y),lanthanum(La),i-cerium(Ce),ipraseodymium(Pr),neodymium(Nd), ipromethium (Pm),samarium(Sm) kunyeubuchopho(I-EU); Izinto ezinzima ezinqabileyo zomhlaba (ezinamanani amakhulu eathom):gadolinium(Gd),terbium(Tb),idysprosium(Dy),iholmium(Ho),ierbium(Er),thulium(Tm),ytterbium(Yb),ilutetium(Lu).
Iioksidi zomhlaba ezinqabileyo zisetyenziswa kakhulu kwi-ceramics, ngakumbii-cerium oxide, i-lanthanum oxide, neodymium oxide, i-dysprosium oxide, isamarium oxide, i-holmium oxide, i-erbium oxide, njl njl. Ukongeza inani elincinci okanye umkhondo womhlaba onqabileyo kwi-ceramics unokutshintsha kakhulu i-microstructure, ukubunjwa kwesigaba, ukuxinana, iimpawu zomatshini, iipropati ezibonakalayo kunye neekhemikhali kunye neempawu ze-sintering ze-ceramics.
2. Ukusetyenziswa komhlaba onqabileyo kwi-MLCCI-Barium titanateyenye yezinto eziphambili zokwenziwa kweMLCC. I-Barium titanate ineepropati ezintle kakhulu ze-piezoelectric, i-ferroelectric kunye ne-dielectric. I-titanate ye-barium ecocekileyo inomthamo omkhulu we-coefficient yokushisa, ukushisa okuphezulu kwe-sintering kunye nelahleko enkulu ye-dielectric, kwaye ayifanelekanga ukusetyenziswa ngokuthe ngqo kwi-ceramic capacitors.
Uphando luye lwabonisa ukuba iipropati ze-dielectric ze-barium titanate zihambelana ngokusondeleyo nesakhiwo sayo se-crystal. Ngokusebenzisa i-doping, i-crystal structure ye-barium titanate inokulawulwa, ngaloo ndlela iphucula iimpawu zayo ze-dielectric. Oku ikakhulu ngenxa yokuba i-titanate ye-barium ye-fine-grained iya kwenza i-shell-core structure emva kwe-doping, edlala indima ebalulekileyo ekuphuculeni iimpawu zokushisa ze-capacitance.
I-Doping izinto ezinqabileyo zomhlaba kwisakhiwo se-barium titanate yenye yeendlela zokuphucula ukuziphatha kwe-sintering kunye nokuthembeka kwe-MLCC. Uphando malunga ne-ion doped barium titanate yomhlaba enqabileyo inokulandwa emva phaya ekuqaleni koo-1960. Ukongezwa kweeoksidi zomhlaba ezinqabileyo kunciphisa ukuhamba kweoksijini, enokunyusa ukuzinza kobushushu be-dielectric kunye nokuxhathisa kombane kwi-ceramics ye-dielectric, kunye nokuphucula ukusebenza kunye nokuthembeka kweemveliso. Iioksidi zomhlaba ezinqabileyo ezixhaphakileyo ziquka:i-yttrium oxide(Y2O3), i-dysprosium oxide (Dy2O3), i-holmium oxide (Ho2O3), njl.
Ubungakanani beradiyasi yeeyoni zomhlaba ezinqabileyo zinempembelelo ebalulekileyo kwindawo yeCurie peak ye-barium titanate esekwe kwiiseramics. I-Doping yezinto ezinqabileyo zomhlaba ezine-radii ezahlukeneyo zinokutshintsha iiparamitha ze-lattice ze-crystals kunye nezakhiwo ezingundoqo zeqokobhe, ngaloo ndlela zitshintsha uxinzelelo lwangaphakathi lweekristale. I-Doping ye-ion yomhlaba enqabileyo ene-radii enkulu ikhokelela ekwenziweni kwezigaba ze-pseudocubic kwiikristale kunye noxinzelelo oluseleyo ngaphakathi kweekristale; Ukungeniswa kweeyoni zomhlaba ezinqabileyo ezinerediya ezincinci kukwavelisa uxinzelelo oluncinci lwangaphakathi kwaye kucinezela inguqu yesigaba kulwakhiwo olungundoqo lweqokobhe. Nangona ixabiso elincinci lezongezo, iimpawu ze-oxides ezinqabileyo zomhlaba, ezifana nobukhulu be-particle okanye imilo, zinokuchaphazela kakhulu ukusebenza ngokubanzi okanye umgangatho wemveliso. Ukusebenza okuphezulu kwe-MLCC ihlala iphuhlisa ijolise kwi-miniaturization, ukupakishwa okuphezulu, umthamo omkhulu, ukuthembeka okuphezulu, kunye neendleko eziphantsi. Iimveliso ze-MLCC ezinqamlekileyo zehlabathi ziye zangena kwi-nanoscale, kunye nee-oxides zomhlaba ezinqabileyo, njengezinto ezibalulekileyo ze-doping, kufuneka zibe ne-nanoscale particle size kunye ne-powder dispersion elungileyo.
Ixesha lokuposa: Oct-25-2024