Lapho bakha ama-multilayer Ceramic capacitor (MLCCs), onjiniyela bakagesi bavame ukukhetha izinhlobo ezimbili ze-dielectric kuye ngesicelo - I-Class 1, ama-dielectric material non-ferroelectric afana ne-C0G/NP0, kanye ne-Class 2, ama-dielectric impahla ye-ferroelectric njenge-X5R ne-X7R.Umehluko oyinhloko phakathi kwabo ukuthi i-capacitor, ene-voltage ekhulayo kanye nezinga lokushisa, isenakho ukuzinza okuhle.Kuma-dielectric we-Class 1, amandla ahlala azinzile lapho kusetshenziswa i-voltage ye-DC futhi izinga lokushisa lokusebenza likhuphuka;Ama-dielectric e-Class 2 ane-dielectric constant constant (K), kodwa amandla awazinzile ngaphansi kokushintsha kwezinga lokushisa, i-voltage, imvamisa kanye nesikhathi.
Nakuba amandla angandiswa ngezinguquko ezihlukahlukene zokuklama, njengokushintsha indawo engaphezulu kwezingqimba zama-electrode, inani lezendlalelo, inani lika-K noma ibanga phakathi kwezingqimba ezimbili zama-electrode, amandla e-Dielectrics Ekilasi 2 azogcina ehle kakhulu lapho. I-voltage ye-DC isetshenziswa.Lokhu kungenxa yokuba khona kwento ebizwa ngokuthi i-DC bias, ebangela ukuthi ukwakhiwa kwe-ferroelectric Yekilasi 2 ekugcineni kube nokwehla kokungaguquguquki kwe-dielectric lapho kusetshenziswa amandla kagesi e-DC.
Ngamavelu aphezulu we-K wezinto ze-dielectric, umthelela we-DC bias ungaba nzima nakakhulu, ngama-capacitor okungenzeka alahlekelwe kufika ku-90% noma ngaphezulu kwamandla awo, njengoba kuboniswe kumdwebo.
Amandla e-dielectric wento, okungukuthi i-voltage ugqinsi olunikeziwe lwempahla engamelana nayo, lungaphinde luguqule umphumela we-DC bias ku-capacitor.E-USA, amandla e-dielectric ngokuvamile akalwa ngama-volts/mil (1 mil ilingana neyintshi engu-0.001), kwenye indawo akalwa ngama-volts/micron, futhi anqunywa ukujiya kongqimba lwe-dielectric.Ngenxa yalokho, ama-capacitor ahlukene ane-capacitance efanayo kanye nesilinganiso se-voltage angase enze ngokuhluke kakhulu ngenxa yezakhiwo zawo zangaphakathi ezihlukene.
Kuyaphawuleka ukuthi lapho i-voltage esetshenzisiwe inkulu kunamandla e-dielectric wento, izinhlansi zizodlula ezintweni, okuholela ekuthungeleni okungaba khona noma engozini yokuqhuma okuncane.
Izibonelo ezingokoqobo zendlela ukwenzelela kwe-DC okukhiqizwa ngayo
Uma sicabangela ushintsho lwe-capacitance ngenxa ye-voltage yokusebenza ngokuhambisana nokushintsha kwezinga lokushisa, khona-ke sithola ukuthi ukulahlekelwa kwe-capacitance ye-capacitor kuzoba kukhulu ekushiseni kwesicelo esithile kanye ne-DC voltage.Thatha isibonelo i-MLCC eyenziwe nge-X7R enamandla angu-0.1µF, i-voltage elinganiselwe engu-200VDC, isibalo sesendlalelo sangaphakathi esingu-35 nogqinsi lwama-1.8 mils (0.0018 amayintshi noma ama-microns angu-45.72), lokhu kusho ukuthi uma usebenza ku-200VDC i-dielectric. isendlalelo sihlangabezana kuphela ne-111 volts/mil noma 4.4 volts/micron.Njengesibalo esinzima, i-VC izoba -15%.Uma i-coefficient yezinga lokushisa le-dielectric ingu-±15%ΔC futhi i-VC ingu -15%ΔC, khona-ke i-TVC ephezulu ingu-+15% - 30%ΔC.
Isizathu salokhu kuhluka silele esakhiweni sekristalu se-Class 2 impahla esetshenzisiwe - kulokhu i-barium titanate (BaTiO3).Le nto inesakhiwo sekristalu eyi-cubic lapho izinga lokushisa le-Curie lifinyelelwa noma ngaphezulu.Kodwa-ke, lapho izinga lokushisa libuyela kuzinga lokushisa elizungezile, i-polarization kwenzeka njengoba ukwehla kwezinga lokushisa kubangela ukuthi impahla ishintshe ukwakheka kwayo.I-polarization kwenzeka ngaphandle kwanoma iyiphi inkambu kagesi yangaphandle noma ingcindezi futhi lokhu kwaziwa ngokuthi i-polarization ezenzakalelayo noma i-ferroelectricity.Lapho i-voltage ye-DC isetshenziswa ezintweni ezingeni lokushisa elizungezile, i-polarization ezenzakalelayo ixhunyaniswa nesiqondiso senkambu kagesi kagesi we-DC futhi ukuguqulwa kwe-polarization okuzenzakalelayo kwenzeka, okuholela ekunciphiseni kwamandla.
Namuhla, ngisho namathuluzi okuklama ahlukahlukene atholakalayo okwandisa amandla, amandla e-dielectrics Yekilasi 2 asancipha kakhulu lapho kusetshenziswa i-DC voltage ngenxa yokuba khona kwe-DC bias phenomenon.Ngakho-ke, ukuze uqinisekise ukwethembeka kwesikhathi eside kwesicelo sakho, udinga ukucabangela umphumela wokuchema kwe-DC engxenyeni ngaphezu kwamandla okuzisholo e-MLCC lapho ukhetha i-MLCC.
I-Zhejiang NeoDen Technology Co., LTD., eyasungulwa ngo-2010, ingumkhiqizi ochwepheshe okhethekile emshinini wokukhetha nendawo we-SMT, ihhavini eligeleza kabusha, umshini wokuphrinta we-stencil, ulayini wokukhiqiza we-SMT neminye Imikhiqizo ye-SMT.Sineqembu lethu le-R & D kanye nemboni yethu, sisebenzisa i-R&D yethu ecebile enokuhlangenwe nakho, ukukhiqizwa okuqeqeshwe kahle, sazuza idumela elihle kumakhasimende omhlaba wonke.
Sikholelwa ukuthi abantu abakhulu nozakwethu benza i-NeoDen inkampani enhle futhi ukuzibophezela kwethu Ekusunguleni, Ukuhlukahluka kanye Nokusimama kuqinisekisa ukuthi i-SMT automation ifinyeleleka kuwo wonke umuntu wokuzilibazisa kuyo yonke indawo.
Isikhathi sokuthumela: May-05-2023