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Dielektrik Vaata ka | Navigeerimismenüü

Elektrimaterjalid


eritakistusegatahkedvedeladgaasilisedjuhtpooljuhtmittejuhtElektrivälidielektrilise polarisatsioonidielektrikuskaduelektrivälja tugevusläbilöök










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Dielektrik




Allikas: Vikipeedia






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Dielektrik ehk isoleeraine on väga suure eritakistusega (>108 Ω∙m) aine. Dielektrikud võivad olla nii tahked, vedelad kui ka gaasilised.


Dielektrikut nimetatakse ka mittejuhiks ja seda peamiselt liigituses juht – pooljuht – mittejuht.


Elektriväli tekitab dielektrikus dielektrilise polarisatsiooni. Osa välja energiast muutub soojuseks, mida väljendab dielektrikuskadu. Kui elektrivälja tugevus ületab kriitilise väärtuse, toimub dielektriku läbilöök.


Dielektrikute iseloomustussuurusi:



  • eritakistus,


  • suhteline dielektriline läbitavus,


  • dielektriline vastuvõtlikkus,


  • dielektriline läbilöögitugevus,


  • kaonurga tangens.

Dielektrikuid kasutatakse laialdaselt elektriisoleermaterjalina.



Vaata ka |


  • Dielektriline läbitavus

  • Dielektrikuskadu

  • Kõrge-k-dielektrik




Pärit leheküljelt "https://et.wikipedia.org/w/index.php?title=Dielektrik&oldid=5267222"










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