2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Ferroelectric cov ntaub ntawv-piv txwv li, barium titanate (BaTiO 3) thiab Rochelle ntsev -yog cov muaju uas muaj cov qauv tsim. yog me me hluav taws xob dipoles; uas yog, nyob rau hauv txhua chav tsev qhov chaw ntawm tus nqi zoo thiab tus nqi tsis zoo raug cais me ntsis.
Cov ntaub ntawv twg hauv qab no nthuav tawm ferro hluav taws xob?
Kev piav qhia: Thaum lub dielectric nthuav tawm hluav taws xob polarization txawm tias tsis muaj qhov chaw sab nraud, nws yog lub npe hu ua ferro-electricity thiab cov ntaub ntawv no yog hu ua Ferro-electrics. Lawv yog cov anisotropic crystals uas nthuav tawm spontaneous polarisation. Li no xwb Rochelle ntsev nthuav tawm Ferro-hluav taws xob.
Puas platinum nthuav tawm ferroelectricity?
7.7.
Los ntawm kev sib piv nrog ferromagnetic nco, ferroelectric cov ntaub ntawv raug tshawb xyuas rau cov khoom tsis muaj hluav taws xob (nanocapacitor arrays). Siv cov qauv nanoporous, ferroelectric ceramic (piv txwv li lead zirconate titanate) tuaj yeem tso ua nanoscale Islands tuaj ntawm cov hlau tsim nyog (xws li platinum).
Dab tsi ua rau ferroelectricity?
Peb tam sim no paub tias lub hauv paus chiv keeb ntawm ferroelectric theem hloov hauv oxides yog vim lub hauv paus anharmonic tej zaum qhov chaw uas yog tshwm sim los ntawm softening ntawm lub luv luv repulsions los ntawm covalent hybridization yog li tias cov atoms tuaj yeem txav tawm ntawm qhov nruab nrab thiab ntawm ib leeg.
Dab tsi yog cov yam ntxwv tseem ceeb ntawmCov ntaub ntawv ferroelectric?
Ferroelectric cov ntaub ntawv muaj cov yam ntxwv hauv qab no:
(i) Lawv muaj lub siab dielectric qhov tsis tu ncua uas tsis yog-linear, piv txwv li, nws nyob ntawm qhov ntau. ntawm qhov kev siv zog ntawm qhov hluav taws xob. (ii) Lawv nthuav tawm hysteresis loops, piv txwv li, lub polarization tsis yog linear ua haujlwm ntawm daim ntawv thov hluav taws xob.
Pom zoo:
Cov ntaub ntawv qhia ntawv puas txhawb nqa cov ntaub ntawv kawm?
Cov ntaub ntawv qhia yuav tsum txhawb nqa txoj kev kawm lub tswv yim, cov hom phiaj thiab cov hom phiaj ntawm Cheeb Tsamthiab cov hom phiaj ntawm cov ntaub ntawv kawm uas cov ntaub ntawv yuav raug siv. … Cov ntaub ntawv qhia yuav tsum ua tau raws li cov qauv zoo ntawm cov ntsiab lus tseeb thiab kev nthuav qhia.
Cov keyboard shortcut twg txiav cov ntaub ntawv rau cov ntawv teev cia?
Cov lus txib rau Windows Clipboard yog: CTRL + C kom luam tawm. CTRL+X to txiav. Cov keyboard shortcut twg txiav cov ntaub ntawv rau daim ntawv teev lus nug? the shortcut Ctrl+V in Word. Ctrl + V yog qhov shortcut rau Paste cov lus txib uas ntxig cov ntsiab lus khaws cia hauv Daim Ntawv Teev Npe rau hauv daim ntawv.
Thaum cov ntaub ntawv tshiab cuam tshuam nrog kev muab cov ntaub ntawv qub no hu ua?
Nrog retroactive cuam tshuam, cov ntaub ntawv tshiab cuam tshuam lub peev xwm rov qab cov ntaub ntawv qub. Nrog kev cuam tshuam tsis zoo, nws yog qhov rov qab: cov ntaub ntawv qub cuam tshuam qhov rov qab los ntawm cov ntaub ntawv tshiab tau kawm.
Puas yog cov ntaub ntawv sib tw cov ntaub ntawv raug cai?
Kev tsim "Cov ntaub ntawv cog lus" yog cov ntaub ntawv sau uas txhais lub luag haujlwm, kev lav phib xaub, thiab "Ua haujlwm" raws li Daim Ntawv Cog Lus Tsim Kho, thiab raug cai lij choj rau ob tog (Tswj thiab tus neeg cog lus).
Cov ntaub ntawv twg muaj cov ntaub ntawv bituminous?
Nws muaj ob chav kawm ntawm cov khoom siv bituminous: (1) asph alt; thiab (2) tar. Cov ntaub ntawv no feem ntau yog siv los ua dej-pov thawj sealants, thiab ua cov ntaub ntawv los tuav cov aggregate ua ke nyob rau hauv bituminous pavements. Dab tsi yog cov khoom siv bituminous?
