Aiki na Thermistor

1. Thermistor shine resistor da aka yi da wani abu na musamman, kuma ƙimar juriyarsa tana canzawa tare da zafin jiki. Dangane da bambancin juriya na canjin juriya, thermistors sun kasu kashi biyu:

Wani nau'i ana kiransa tabbataccen thermistor (PTC), wanda ƙimar juriya ta ƙaru da zafin jiki;

Wani nau'in ana kiransa Negative Temperature Coefficient Thermistor (NTC), wanda ƙimar juriyarsa ke raguwa tare da ƙara yawan zafin jiki.

2. Thermistor aiki ka'idar

1) Ma'aunin zafin jiki mai kyau (PTC)

PTC gabaɗaya an yi shi da barium titanate a matsayin babban abu, kuma ana ƙara ƙaramin adadin abubuwan da ba kasafai ba a duniya zuwa barium titanate, kuma ana yin shi ta hanyar sarrafa zafin jiki. Barium titanate abu ne na polycrystalline. Akwai mu'amala tsakanin kristal na ciki da crystal. Lokacin da zafin jiki ya yi ƙasa, na'urorin lantarki masu gudanarwa na iya hayewa cikin sauƙi na ƙirar barbashi saboda filin lantarki na ciki. A wannan lokacin, ƙimar juriyar sa Za ta zama ƙarami. Lokacin da zafin jiki ya tashi, filin lantarki na ciki zai lalace, yana da wahala masu sarrafa electrons su haye madaidaicin kwayar halitta, kuma ƙimar juriya zata tashi a wannan lokacin.

2) Rage yawan zafin jiki na thermistor (NTC)

NTC gabaɗaya an yi shi da kayan ƙarfe oxide kamar cobalt oxide da nickel oxide. Irin wannan nau'in oxide na ƙarfe yana da ƙarancin electrons da ramuka, kuma ƙimar juriyarsa za ta fi girma. Lokacin da zafin jiki ya tashi, adadin electrons da ramukan ciki zasu karu kuma ƙimar juriya zata ragu.

3. Amfanin thermistor

High ji na ƙwarai, da zafin jiki coefficient na thermistor ne fiye da 10-100 sau girma fiye da na karfe, kuma zai iya gane zazzabi canje-canje na 10-6 ℃; m aiki zazzabi kewayon, al'ada zazzabi na'urorin dace da -55 ℃ ~ 315 ℃, high zafin jiki na'urorin dace da zazzabi Sama 315 ℃ (a halin yanzu mafi girma iya isa 2000 ℃), da low-zazzabi na'urar dace da -273 ℃ ~ -55 ℃; yana da ƙananan girman kuma yana iya auna zafin sararin samaniya wanda sauran ma'aunin zafi da sanyio ba zai iya aunawa ba

4. Aikace-aikacen thermistor

Babban aikace-aikace na thermistor shine azaman abubuwan gano yanayin zafin jiki, kuma gano yanayin zafin jiki yawanci yana amfani da thermistor tare da ƙarancin zafin jiki mara kyau, wato, NTC. Misali, na'urorin gida da aka saba amfani da su, kamar su dafaffen shinkafa, injin girki, da sauransu, duk suna amfani da na'urori masu zafi.