izindaba

I-PTC ibhekisela esimweni se-thermistor noma impahla enokwenyuka okubukhali kokumelana kanye ne-coefficient yezinga lokushisa elihle ezingeni elithile lokushisa, elingasetshenziswa ngokukhethekile njengenzwa yokushisa engashintshi. Izinto ezibonakalayo ziwumzimba one-sintered one-BaTiO3, i-SrTiO3 noma i-PbTiO3 njengengxenye eyinhloko, lapho inani elincane lama-oxide afana ne-Nb, Ta, Bi, Sb, y, La namanye ama-oxide engezwa ukulawula i-atomic valence ukuze ayenze. i-semiconducting. Le semiconducting barium titanate nezinye izinto zivame ukubizwa ngokuthi i-semiconducting (inqwaba) porcelain; ngesikhathi esifanayo, ama-oxide e-manganese, insimbi, ithusi, i-chromium nezinye izithasiselo zengezwa ukuze kwandiswe izinga lokushisa lokumelana okuhle.

I-PTC ibhekisela esimweni se-thermistor noma impahla enokwenyuka okubukhali kokumelana kanye ne-coefficient yezinga lokushisa elihle ezingeni elithile lokushisa, elingasetshenziswa ngokukhethekile njengenzwa yokushisa engashintshi. Izinto ezibonakalayo ziwumzimba one-sintered one-BaTiO3, i-SrTiO3 noma i-PbTiO3 njengengxenye eyinhloko, lapho inani elincane lama-oxide afana ne-Nb, Ta, Bi, Sb, y, La namanye ama-oxide engezwa ukulawula i-atomic valence ukuze ayenze. i-semiconducting. Le semiconducting barium titanate nezinye izinto zivame ukubizwa ngokuthi i-semiconducting (inqwaba) porcelain; ngesikhathi esifanayo, ama-oxide e-manganese, insimbi, ithusi, i-chromium nezinye izithasiselo zengezwa ukuze kwandiswe izinga lokushisa lokumelana okuhle. I-platinum titanate kanye nesixazululo sayo esiqinile kwenziwa i-semiconductorized ngokubunjwa kwe-ceramic evamile kanye ne-high-tempering sintering ukuze kutholwe izinto ze-thermistor ezinezici ezinhle. I-coefficient yayo yezinga lokushisa kanye nezinga lokushisa lephoyinti le-Curie liyahlukahluka ngokwakheka nezimo ze-sintering (ikakhulukazi izinga lokushisa lokupholisa).
Amakristalu e-Barium titanate ayingxenye yesakhiwo se-perovskite. Yimpahla ye-ferroelectric, futhi i-barium titanate ehlanzekile iyinto evikelayo. Ngemuva kokwengezwa kwezinto ezingavamile zomhlaba ezilandelwayo ku-barium titanate kanye nokwelashwa okufanele kokushisa, ukumelana nokushisa kukhula kakhulu ngama-oda amaningana wobukhulu obuseduze nezinga lokushisa le-Curie, okuholela kumphumela we-PTC, ohambisana nokuvuthwa kukagesi kwamakristalu e-barium titanate kanye nempahla izinga lokushisa Curie. izinguquko zesigaba esiseduze. I-Barium titanate semiconductor ceramics yizinto ze-polycrystalline ezinokuxhumana phakathi kwezinhlamvu. Lapho i-ceramic semiconductor ifinyelela izinga lokushisa elithile noma i-voltage, umngcele wokusanhlamvu uyashintsha, okuholela ekushintsheni okubukhali kokumelana.
Umphumela we-PTC we-barium titanate semiconductor ceramics uvela emingceleni yokusanhlamvu (imingcele yokusanhlamvu). Ngokuqhuba ama-electron, ukuxhumana phakathi kwezinhlayiya kusebenza njengesithiyo esingaba khona. Lapho izinga lokushisa liphansi, ngenxa yesenzo senkambu kagesi ku-titanate ye-barium, ama-electron angadlula kalula umgoqo ongase ube khona, ngakho-ke inani lokumelana lincane. Uma izinga lokushisa liphakanyiswa eduze nezinga lokushisa lephoyinti le-Curie (okungukuthi izinga lokushisa elibucayi), inkambu kagesi yangaphakathi iyabhujiswa, engakwazi ukusiza ekuqhubeni ama-electron ukweqa umgoqo ongase ube khona. Lokhu kulingana nokwanda kwesithiyo esingaba khona kanye nokwanda okungazelelwe kokumelana, okuholela kumphumela we-PTC. Amamodeli aphathekayo omphumela we-PTC we-barium titanate semiconductor ceramics ahlanganisa imodeli ye-Haiwang surface barrier, imodeli yesikhala se-barium kanye nemodeli yokuvimbela i-superposition ka-Daniels et al. Benze incazelo ephusile yomphumela we-PTC kusuka ezicini ezahlukahlukene.