Muaj nuj nqi ntawm cov thermistor

1. Tus tsav kub yog lub resistor ua los ntawm cov khoom siv tshwj xeeb, thiab nws cov nqi tiv thaiv kev tiv thaiv kev hloov pauv nrog qhov ntsuas kub. Raws li cov coefficient ntawm kev tawm tsam tawm, tus ua mob tau muab faib ua ob pawg:

Ib hom hu ua qhov kub ntsuas kub coefficient thermistor (PTC), uas nws tus nqi RESORANCE nce nrog qhov kub;

Lwm hom yog hu ua qhov ntsuas kub tsis zoo coefficient thermistor (NTC), uas nws tus nqi tiv taus tsawg dua nrog kev nce qib.

2. Tus Phooj Ywg Ua Haujlwm Txheej Txheem

1) Qhov Kub Kub Coefficient Thermistor (PTC)

PTC feem ntau yog ua los ntawm Barium Titanate yog cov khoom siv tseem ceeb, thiab lub ntiaj teb tsawg dua rau Barium Titanate, thiab nws yog tsim los ntawm qhov kub siab sintering. Barium Titanate yog cov khoom siv polycrystalline. Muaj cov crystal crystal enterface ntawm sab hauvryry thiab siv lead ua. Thaum qhov ntsuas kub tsawg, cov hluav taws xob hluav taws xob tau yooj yim hla lub interface particle vim vim yog daim teb hluav taws xob sab hauv. Lub sijhawm no, nws tus nqi tiv thaiv yuav me dua. Thaum qhov kub nce, lub teb hluav taws xob sab hauv yuav raug rhuav tshem, nws yog qhov nyuaj rau cov tshuab hluav taws xob rov qab los hla cov khoom siv cuam tshuam yuav hla tus nqi yuav nce rau lub sijhawm no.

2) Cov ntsuas kub tsis zoo ntsuas kub (NTC)

NTC feem ntau yog ua los ntawm cov khoom siv hlau oxide xws li cobalt oxide thiab npib oxel oxide. Hom hlau oxide muaj tsawg dua electrons thiab qhov, thiab nws tus nqi tiv thaiv yuav siab dua. Thaum qhov kub nce, tus naj npawb ntawm cov electrons thiab qhov sab hauv yuav nce thiab cov nqi tiv thaiv yuav qis dua.

3. Qhov zoo ntawm cov thermistor

High rhiab heev, ntsuas kub coefficient ntawm cov thermistor yog ntau tshaj li 10-100 npaug loj dua li tias ntawm cov hlau, thiab tuaj yeem kuaj ntsuas kub ntawm 10-6 ℃; Kev ua haujlwm dav, cov khoom siv kub li qub -55 ℃; Nws yog me me nyob rau hauv loj thiab tuaj yeem ntsuas qhov kub ntawm qhov chaw uas lwm qhov ntsuas hluav taws xob tsis tuaj yeem ntsuas

4. Kev thov ntawm cov thermistor

Daim ntawv thov lub ntsiab ntawm lub thermistor yog qhov ntsuas kub thiab txias siv lub ntsuas kub nrog cov ntsuas kub tsis zoo, yog, NTC. Piv txwv li, siv cov khoom siv hauv tsev, xws li cov khoom noj nplej ua ke, thiab lwm yam, txhua yam siv cov cua nab.