1. I-Thermistor yi-resistor eyenziwe yinto ekhethekileyo, kwaye ixabiso layo lokumelana litshintsha ngobushushu. Ngokwe-coefficient eyahlukileyo yokutshintsha kokumelana, i-thermistors yahlulwe yangamacandelo amabini:
Olunye uhlobo lubizwa ngokuba yi-positive temperature coefficient thermistor (PTC), ixabiso layo lokumelana nalo linyuka ngobushushu;
Olunye uhlobo lubizwa ngokuba yi-Negative Temperature Coefficient Thermistor (NTC), ixabiso layo lokumelana liyancipha ngokunyuka kobushushu.
2. Umgaqo wokusebenza we-Thermistor
1) Ithermistor yobushushu obufanelekileyo (PTC)
I-PTC ngokuqhelekileyo yenziwe nge-barium titanate njengeyona nto ibalulekileyo, kunye nenani elincinci lezinto ezinqabileyo zomhlaba zongezwa kwi-barium titanate, kwaye yenziwe ngokushisa okuphezulu kwe-sintering. I-Barium titanate yimathiriyeli ye-polycrystalline. Kukho i-crystal particle interface phakathi kwe-crystal yangaphakathi kunye ne-crystal. Xa ubushushu buphantsi, ii-electrons conductive ngokulula ukuwela ujongano lwamasuntswana ngenxa yentsimi yombane yangaphakathi. Ngeli xesha, ixabiso layo lokumelana liya kuba lincinci. Xa izinga lokushisa liphakama, intsimi yombane yangaphakathi iya kutshatyalaliswa, kunzima ukuba i-electron conductive iwele i-interface ye-particle interface, kwaye ixabiso lokumelana liya kuphakama ngeli xesha.
2) Ithermistor yeqondo lobushushu elibi (NTC)
I-NTC ngokuqhelekileyo yenziwe ngezinto zentsimbi ze-oxide ezifana ne-cobalt oxide kunye ne-nickel oxide. Olu hlobo lwe-oxide yensimbi lunee-electron ezimbalwa kunye nemingxuma, kwaye ixabiso layo lokumelana liya kuba phezulu. Xa izinga lokushisa liphakama, inani le-electron kunye nemingxuma ngaphakathi liya kwanda kwaye ixabiso lokumelana liya kuncipha.
3. Izinto ezilungileyo ze-thermistor
Uvakalelo oluphezulu, i-coefficient yobushushu be-thermistor ingaphezulu kwamaxesha angama-10-100 amakhulu kuneyentsimbi, kwaye inokubona utshintsho lobushushu lwe-10-6 ℃; Uluhlu olubanzi lobushushu bokusebenza, izixhobo zobushushu obuqhelekileyo zifanelekile -55 ℃ ~ 315 ℃, izixhobo zobushushu obuphezulu zifanelekile ubushushu obungaphezulu kwe-315 ℃ (ngoku elona liphezulu linokufikelela kwi-2000 ℃), isixhobo sobushushu obuphantsi sifanelekile -273 ℃ ~ -55℃; incinci ngobungakanani kwaye inokulinganisa ubushushu bendawo leyo ezinye iithemomitha zingenako ukulinganisa
4. Ukusetyenziswa kwe-thermistor
Ukusetyenziswa okuphambili kwe-thermistor njengento yokufumanisa ubushushu, kwaye ukufumanisa ubushushu ngokuqhelekileyo kusebenzisa i-thermistor ene-coefficient yeqondo lokushisa elibi, oko kukuthi, i-NTC. Umzekelo, izixhobo zasekhaya ezisetyenziswa ngokuqhelekileyo, ezifana nezipheki zerayisi, ii-induction cookers, njl., zonke zisebenzisa i-thermistors.
Ixesha lokuposa: Nov-06-2024