Ọrụ nke Thermistor

1. Thermistor bụ resistor mere ihe pụrụ iche, na uru iguzogide ya na-agbanwe na okpomọkụ. Dabere na ọnụọgụ dị iche iche nke mgbanwe nguzogide, a na-ekewa thermistors ụzọ abụọ:

A na-akpọ otu ụdị thermistor nke ọma (PTC), nke uru nguzogide ya na-abawanye na okpomọkụ;

Ụdị nke ọzọ ka a na-akpọ Negative Temperature Coefficient Thermistor (NTC), nke uru nguzogide ya na-ebelata site na mmụba okpomọkụ.

2. Thermistor arụ ọrụ ụkpụrụ

1) ezigbo okpomọkụ ọnụọgụ thermistor (PTC)

A na-ejikarị barium titanate eme PTC dị ka ihe bụ isi, a na-agbakwunye obere ihe nke ụwa na-adịghị ahụkebe na barium titanate, a na-eme ya site na ikpo ọkụ dị elu. Barium titanate bụ ihe polycrystalline. Enwere interface urughuru kristal n'etiti kristal dị n'ime na kristal. Mgbe okpomọkụ dị ala, ndị na-eduzi eletrọn nwere ike gafee urughuru interface n'ihi na esịtidem ọkụ eletrik. N'oge a, uru nguzogide ya ga-adị obere. Mgbe okpomọkụ na-ebili, a ga-ebibi ọkụ eletrik dị n'ime, ọ na-esiri ndị na-eduzi electrons ike ịgafe ihe ntanetị ahụ, uru nkwụsị ga-ebili n'oge a.

2) Thermistor okpomọkụ na-adịghị mma (NTC)

NTC na-ejikarị ihe igwe oxide dị ka cobalt oxide na nickel oxide. Ụdị oxide ígwè a nwere obere electrons na oghere, uru nkwụsị ya ga-adị elu. Mgbe okpomọkụ na-ebili, ọnụ ọgụgụ electrons na oghere dị n'ime ga-abawanye na uru nkwụsị ga-ebelata.

3. Uru nke thermistor

High uche, okpomọkụ ọnụọgụ nke thermistor bụ ihe karịrị 10-100 ugboro ibu karịa nke metal, na ike ịchọpụta okpomọkụ mgbanwe nke 10-6 ℃; obosara na-arụ ọrụ okpomọkụ nso, nkịtị okpomọkụ ngwaọrụ bụ adabara -55 ℃ ~ 315 ℃, elu okpomọkụ ngwaọrụ adabara okpomọkụ N'elu 315 ℃ (ugbu a kasị elu nwere ike iru 2000 ℃), na ala okpomọkụ ngwaọrụ adabara -273 ℃ ~ -55 ℃; ọ dị ntakịrị n'ogo ma nwee ike ịlele okpomọkụ nke oghere nke temometa ndị ọzọ na-enweghị ike ịlele

4. Ngwa nke thermistor

Isi ngwa nke thermistor dị ka ihe nchọpụta okpomọkụ, na nchọpụta okpomọkụ na-ejikarị thermistor nwere ọnụọgụ okpomọkụ na-adịghị mma, ya bụ, NTC. Dịka ọmụmaatụ, ngwa ụlọ a na-ejikarị eme ihe, dị ka ite osikapa, osi nri induction, wdg, niile na-eji thermistors.