1. tooj liab:

Siv electrolytic tooj liab ua raw khoom, tooj liab hlau ua los ntawm nruam casting thiab dov txheej txheem hu ua low oxygen tooj liab hlau.Cov hlau tooj liab hu ua oxygen-dawb tooj liab hlau.

Cov pa oxygen tooj liab qis qis yog 100 ~ 250ppm, cov ntsiab lus tooj liab yog 99.9 ~ 9.95%, conductivity yog 100 ~ 101%.

Oxygen dawb tooj liab hlau cov ntsiab lus yog 4 ~ 20ppm, tooj liab cov ntsiab lus yog 99.96 ~ 9.99%, conductivity yog 102%.

Lub ntiajteb txawj nqus ntawm tooj liab yog 8.9g / cm3.

2. Aluminium hlau:

Aluminium hlau siv rau hluav taws xob hlau yog annealed thiab softened.Aluminium hlau siv rau cable tsis feem ntau softened.

Qhov hluav taws xob tiv thaiv ntawm txhuas siv rau cov xov hlau thiab cables yuav tsum yog 0.028264 ω.mm2 / m, thiab lub ntiajteb txawj nqus ntawm txhuas yuav tsum yog 2.703g / cm3.

3. Polyvinyl chloride (PVC)

Polyvinyl chloride yas yog raws li polyvinyl chloride resin, ntxiv ntau hom kev sib koom ua ke sib xyaw ua ke, xws li tus neeg saib xyuas kev laus, antioxidant, muab tub lim, ci ci, nplaim hluav taws, thiab lwm yam, nws qhov ntom ntom yog li 1.38 ~ 1.46g / cm3.

Cov yam ntxwv ntawm cov khoom siv PVC:

Cov khoom siv zoo heev, tshuaj tiv thaiv corrosion, tsis muaj combustion, huab cua tsis zoo, rwb thaiv tsev zoo, ua haujlwm yooj yim, thiab lwm yam.

Qhov tsis zoo ntawm cov khoom siv PVC:

(1) thaum kub hnyiab, cov pa luam yeeb tawm ntau heev;

(2) Tsis zoo thermal aging kev ua tau zoo.

PVC muaj cov khoom siv rwb thaiv tsev thiab cov ntaub qhwv cov ntsiab lus.

4. PEB:

Polyethylene yog ua los ntawm refined ethylene polymerization, raws li qhov ceev yuav muab faib ua low density polyethylene (LDPE), medium ntom polyethylene (MDPE), high density polyethylene (HDPE).

Qhov ceev ntawm polyethylene tsawg ntom yog 0.91-0.925 g / cm3.Qhov ceev ntawm nruab nrab ntom polyethylene yog 0.925-0.94 g / cm3.Qhov ceev ntawm hdPE yog 0.94-0.97 g / cm3.

Qhov zoo ntawm cov khoom siv polyethylene:

(1) High rwb thaiv tsev tsis kam thiab voltage kuj;

(2) Nyob rau hauv ntau ntau zaus bands, lub dielectric tas li ε thiab lub dielectric poob lub kaum sab xis tgδ yog me me;

(3) yoog raws, hnav tsis kam;

④ Cov cua sov zoo tiv thaiv kev laus, kev ua haujlwm kub thiab tshuaj lom neeg ruaj khov;

⑤ Cov dej tsis zoo thiab nqus dej tsawg;

⑥ Lub cable ua nrog nws yog lub teeb nyob rau hauv zoo thiab yooj yim rau siv thiab tso.

Disadvantages ntawm cov khoom siv polyethylene:

Yooj yim rau hlawv thaum tiv nrog nplaim taws;

Lub softening kub yog tsawg.