litaba

PTC e bua ka ketsahalo ea thermistor kapa thepa e nang le keketseho e matla ea ho hanyetsa le mocheso o motle oa mocheso ka mocheso o itseng, o ka sebelisoang ka ho khetheha e le mochine o sa khaotseng oa mocheso. Thepa ke 'mele o sintered o nang le BaTiO3, SrTiO3 kapa PbTiO3 e le karolo e ka sehloohong, moo palo e nyenyane ea oxides e kang Nb, Ta, Bi, Sb, y, La le li-oxide tse ling li kenngoa ho laola valence ea atomic ho e etsa. semiconducting. Semiconducting barium titanate le lisebelisoa tse ling hangata li bitsoa semiconducting (boholo) porcelain; ka nako e ts'oanang, li-oxide tsa manganese, tšepe, koporo, chromium le li-additives tse ling li kenngoa ho eketsa mocheso oa mocheso oa ho hanyetsa hantle.

PTC e bua ka ketsahalo ea thermistor kapa thepa e nang le keketseho e matla ea ho hanyetsa le mocheso o motle oa mocheso ka mocheso o itseng, o ka sebelisoang ka ho khetheha e le mochine o sa khaotseng oa mocheso. Thepa ke 'mele o sintered o nang le BaTiO3, SrTiO3 kapa PbTiO3 e le karolo e ka sehloohong, moo palo e nyenyane ea oxides e kang Nb, Ta, Bi, Sb, y, La le li-oxide tse ling li kenngoa ho laola valence ea atomic ho e etsa. semiconducting. Semiconducting barium titanate le lisebelisoa tse ling hangata li bitsoa semiconducting (boholo) porcelain; ka nako e ts'oanang, li-oxide tsa manganese, tšepe, koporo, chromium le li-additives tse ling li kenngoa ho eketsa mocheso oa mocheso oa ho hanyetsa hantle. Platinum titanate le tharollo ea eona e tiileng li entsoe ka semiconductorized ka ho bopeha ho tloaelehileng ka ceramic le sintering e phahameng ea mocheso ho fumana lisebelisoa tsa thermistor tse nang le litšobotsi tse ntle. Thempereichara ea eona ea mocheso le mocheso oa ntlha ea Curie li fapana ho ea ka sebopeho le maemo a sintering (haholo-holo mocheso o pholileng).
Likristale tsa Barium titanate ke tsa sebopeho sa perovskite. Ke thepa ea ferroelectric, 'me barium titanate e hloekileng ke thepa e sireletsang. Ka mor'a ho eketsoa ha likarolo tse sa tloaelehang tsa lefats'e ho barium titanate le phekolo e nepahetseng ea mocheso, resistivity e eketseha haholo ka litaelo tse 'maloa tsa boholo bo potolohileng mocheso oa Curie, e leng se hlahisang phello ea PTC, e lumellanang le ferroelectricity ea likristale tsa barium titanate le lisebelisoa tse teng. mocheso oa Curie. liphetoho tsa mekhahlelo e haufi. Li-ceramics tsa Barium titanate semiconductor ke lisebelisoa tsa polycrystalline tse nang le marang-rang pakeng tsa lijo-thollo. Ha ceramic ea semiconductor e fihla mocheso o itseng kapa motlakase, moeli oa lijo-thollo oa fetoha, o baka phetoho e matla ea ho hanyetsa.
Phello ea PTC ea barium titanate semiconductor ceramics e tsoa meeling ea lijo-thollo (meeli ea lijo-thollo). Bakeng sa ho tsamaisa lielektrone, sehokelo pakeng tsa likaroloana se sebetsa e le tšitiso e ka bang teng. Ha mocheso o le tlase, ka lebaka la ketso ea tšimo ea motlakase ho titanate ea barium, li-electrone li ka feta habonolo mokoallong o ka bang teng, kahoo boleng ba ho hanyetsa bo nyenyane. Ha mocheso o phahamisoa haufi le mocheso oa ntlha ea Curie (ke hore mocheso o boima), sebaka sa motlakase se ka hare se senyeha, se ke keng sa thusa ho tsamaisa lielektrone ho tšela mokoallo o ka bang teng. Sena se lekana le ho eketseha ha tšitiso e ka 'nang ea e-ba teng le keketseho ea tšohanyetso ea khanyetso, e bakang phello ea PTC. Mehlala ea 'mele ea phello ea PTC ea li-ceramics tsa barium titanate semiconductor e kenyelletsa mohlala oa Haiwang holim'a mokoallo, mohlala oa sebaka sa barium le mohlala oa superposition barrier oa Daniels et al. Ba entse tlhaloso e utloahalang bakeng sa phello ea PTC ho tsoa likarolong tse fapaneng.