Mgbe ị na-ewu multilayer ceramic capacitors (MLCCs), ndị injinia eletrik na-ahọrọkarị ụdị dielectric abụọ dabere na ngwa ahụ - Klas 1, ihe ndị na-adịghị ferroelectric dielectrics dị ka C0G/NP0, na Klas 2, ferroelectric material dielectrics dị ka X5R na X7R.Isi ihe dị iche n'etiti ha bụ ma capacitor, na-abawanye voltaji na okpomọkụ, ka nwere ezigbo nkwụsi ike.Maka klaasị 1 dielectrics, ike na-adịgide adịgide mgbe etinyere voltaji DC na okpomọkụ na-arụ ọrụ na-ebili;Klas 2 dielectrics nwere nnukwu dielectric mgbe niile (K), mana ike anaghị akwụsi ike n'okpuru mgbanwe okpomọkụ, voltaji, ugboro na oge.
Ọ bụ ezie na enwere ike ịbawanye ikike site na mgbanwe mgbanwe dị iche iche, dị ka ịgbanwe mpaghara elu nke ọkwa electrode, ọnụ ọgụgụ nke ọkwa, uru K ma ọ bụ ebe dị anya n'etiti akwa electrode abụọ, ikike nke Class 2 dielectrics ga-emecha daa ngwa ngwa mgbe. a na-etinye voltaji DC.Nke a bụ n'ihi ọnụnọ nke ihe a na-akpọ DC bias, nke na-eme ka klas 2 ferroelectric formulations na-emesị nweta ọdịda na dielectric mgbe a na-etinye voltaji DC.
Maka ụkpụrụ K dị elu nke ihe dielectric, mmetụta nke nhụsianya DC nwere ike ịka njọ karị, na capacitors nwere ike ịnwụ ruo 90% ma ọ bụ karịa nke ike ha, dị ka egosiri na eserese ahụ.
The dielectric ike nke ihe onwunwe, ie voltaji na a nyere ọkpụrụkpụ nke ihe nwere ike idi, nwekwara ike ịgbanwe mmetụta nke DC n'ụzọ na a capacitor.Na USA, a na-atụkarị ike dielectric na volts/mil (1 mil nhata 0.001 inch), ebe ndị ọzọ a na-atụ ya na volts/micron, a na-ekpebikwa ya site na ọkpụrụkpụ nke oyi akwa dielectric.N'ihi ya, capacitors dị iche iche nwere otu capacitance na ọkwa voltaji nwere ike ịrụ ọrụ dị iche iche n'ihi ihe dị n'ime ha dị iche iche.
Ọ dị mma ịmara na mgbe voltaji etinyere dị ukwuu karịa ike dielectric nke ihe ahụ, ọkụ ọkụ ga-agafe ihe ahụ, na-eduga n'inwe ọkụ ma ọ bụ obere ihe mgbawa.
Ọmụmaatụ bara uru nke ka esi ewepụta ajọ mbunobi DC
Ọ bụrụ na anyị na-atụle mgbanwe na capacitance n'ihi voltaji arụ ọrụ na njikọ na mgbanwe okpomọkụ, mgbe ahụ, anyị na-ahụ na capacitance ọnwụ nke capacitor ga-adị ukwuu na kpọmkwem ngwa okpomọkụ na DC voltaji.Were dịka ọmụmaatụ MLCC nke X7R nwere ikike nke 0.1µF, voltaji e gosiri 200VDC, ọnụ ọgụgụ oyi akwa nke 35 na ọkpụrụkpụ nke 1.8 mils (0.0018 sentimita ma ọ bụ 45.72 microns), nke a pụtara na mgbe ị na-arụ ọrụ na 200VDC dielectric oyi akwa na-enweta naanị 111 volts/mil ma ọ bụ 4.4 volts/micron.Dị ka mgbako siri ike, VC ga-abụ -15%.Ọ bụrụ na ọnụọgụ okpomọkụ nke dielectric bụ ± 15% ΔC na VC bụ -15% ΔC, mgbe ahụ TVC kacha elu bụ + 15% - 30% ΔC.
Ihe kpatara mgbanwe a dị na nhazi kristal nke klas 2 ejiri mee ihe - na nke a barium titanate (BaTiO3).Ihe a nwere usoro kristal cubic mgbe okpomọkụ Curie ruru ma ọ bụ karịa.Otú ọ dị, mgbe okpomọkụ na-alaghachi na ọnọdụ okpomọkụ, polarization na-eme ka mbelata nke okpomọkụ na-eme ka ihe ahụ gbanwee nhazi ya.Polarization na-eme na-enweghị ebe eletriki ma ọ bụ nrụgide ọ bụla nke a na-akpọ nke a dị ka polarization mberede ma ọ bụ ferroelectricity.Mgbe a na-etinye voltaji DC na ihe dị na ọnọdụ okpomọkụ, a na-ejikọta polarization na-enweghị isi na ntụziaka nke ọkụ eletrik nke DC voltaji na ngbanwe nke polarization na-enweghị isi na-eme, na-eme ka mbelata ike.
N'oge a, ọbụlagodi na ngwaọrụ nhazi dị iche iche dị iji mee ka ikike dị elu, ikike nke Class 2 dielectrics ka na-ebelata nke ukwuu mgbe a na-etinye voltaji DC n'ihi ọnụnọ nke ihe ngosi DC.Ya mere, iji hụ na ntụkwasị obi nke ngwa gị ga-adịte aka, ịkwesịrị iburu n'uche mmetụta nke nhụsianya DC na akụrụngwa na mgbakwunye na ikike aha nke MLCC mgbe ị na-ahọrọ MLCC.
Zhejiang NeoDen Technology Co., LTD., tọrọ ntọala na 2010, bụ ọkachamara emeputa pụrụ iche na SMT pick na ebe igwe, reflow oven, stencil obibi igwe, SMT mmepụta akara na ndị ọzọ SMT Ngwaahịa.Anyị nwere otu R & D nke anyị na ụlọ ọrụ mmepụta ihe, na-ewere uru nke R&D nke anyị nwere ahụmahụ bara ụba, mmepụta a zụrụ nke ọma, meriri aha ọma sitere n'aka ndị ahịa ụwa niile.
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Oge nzipu: Mee-05-2023