PTC na-ezo aka na ihe omume thermistor ma ọ bụ ihe nwere mmụba dị nkọ na nguzogide yana ọnụọgụ okpomọkụ dị mma na ụfọdụ okpomọkụ, nke enwere ike iji ya mee ihe dị ka ihe mmetụta okpomọkụ mgbe niile. Ihe ahụ bụ ahụ siri ike na BaTiO3, SrTiO3 ma ọ bụ PbTiO3 dị ka akụkụ bụ isi, nke a na-agbakwunye obere oxides dị ka Nb, Ta, Bi, Sb, y, La na oxides ndị ọzọ iji chịkwaa valence atọm iji mee ya. semiconducting. Nke a semiconducting barium titanate na ihe ndị ọzọ na-na-ezokarị dị ka semiconducting (oke) poselin; N'otu oge ahụ, a na-agbakwunye oxides nke manganese, ígwè, ọla kọpa, chromium na ihe mgbakwunye ndị ọzọ iji mee ka ọnụọgụ okpomọkụ nke nguzogide dị mma.
PTC na-ezo aka na ihe omume thermistor ma ọ bụ ihe nwere mmụba dị nkọ na nguzogide yana ọnụọgụ okpomọkụ dị mma na ụfọdụ okpomọkụ, nke enwere ike iji ya mee ihe dị ka ihe mmetụta okpomọkụ mgbe niile. Ihe ahụ bụ ahụ siri ike na BaTiO3, SrTiO3 ma ọ bụ PbTiO3 dị ka akụkụ bụ isi, nke a na-agbakwunye obere oxides dị ka Nb, Ta, Bi, Sb, y, La na oxides ndị ọzọ iji chịkwaa valence atọm iji mee ya. semiconducting. Nke a semiconducting barium titanate na ihe ndị ọzọ na-na-ezokarị dị ka semiconducting (oke) poselin; N'otu oge ahụ, a na-agbakwunye oxides nke manganese, ígwè, ọla kọpa, chromium na ihe mgbakwunye ndị ọzọ iji mee ka ọnụọgụ okpomọkụ nke nguzogide dị mma. Platinum titanate na ngwọta ya siri ike bụ semiconductorized site na ịkpụzi seramiiki nkịtị na ikpo ọkụ dị elu iji nweta ihe thermistor nwere njirimara dị mma. Ọnụọgụ ọnọdụ okpomọkụ ya na ọnọdụ Curie dị iche iche site na nhazi na ọnọdụ sentering (karịsịa okpomọkụ jụrụ oyi).
kristal titanate Barium bụ nke ihe owuwu perovskite. Ọ bụ ihe ferroelectric, na barium titanate dị ọcha bụ ihe mkpuchi. Mgbe mgbakwunye na trace obere ụwa ọcha na barium titanate na ọgwụgwọ okpomọkụ kwesịrị ekwesị, resistivity na-abawanye nke ukwuu site na ọtụtụ iwu nke ịdị ukwuu gburugburu Curie okpomọkụ, na-akpata mmetụta PTC, nke kwekọrọ na ferroelectricity nke kristal barium titanate na ihe dị na ya. okpomọkụ Curie. Ntugharị akụkụ dị nso. Barium titanate semiconductor ceramics bụ ihe polycrystalline nwere oghere n'etiti ọka. Mgbe seramiiki semiconductor ruru ụfọdụ okpomọkụ ma ọ bụ voltaji, oke ọka na-agbanwe, na-ebute mgbanwe dị nkọ na nguzogide.
Mmetụta PTC nke barium titanate semiconductor ceramics sitere na oke ọka (oke ọka). N'ihi na-eduzi electrons, interface n'etiti ahụ na-eme ihe dị ka ihe mgbochi nwere ike ime. Mgbe okpomọkụ dị ala, n'ihi ọrụ nke ọkụ eletrik na barium titanate, ndị electrons nwere ike ịgafe ngwa ngwa site na ihe mgbochi nwere ike ime, ya mere uru nkwụsị ahụ dị ntakịrị. Mgbe okpomọkụ dị n'akụkụ okpomọkụ Curie (ya bụ okpomọkụ dị oke egwu), a na-ebibi ebe eletrik dị n'ime, nke na-enweghị ike inye aka na-eduzi electrons iji gafee ihe mgbochi ahụ. Nke a kwekọrọ na mmụba nke ihe mgbochi nwere ike ime na mmụba mberede na nguzogide, na-ebute mmetụta PTC. Ụdị anụ ahụ nke mmetụta PTC nke barium titanate semiconductor ceramics gụnyere ihe mgbochi elu Haiwang, ụdị ohere ohere barium na ihe mgbochi superposition nke Daniels et al. Ha emeela nkọwa ezi uche dị na ya maka mmetụta PTC site na akụkụ dị iche iche.
Oge nzipu: Mar-09-2022
