Muaj ntau qhov zoo ntawm cov ntsev ntsev uas ua rau lawv txaus siab rau kev siv ntau yam kev siv. Cov ntsev molten uas tau siv ntau zaus hauv kev siv hluav taws xob hloov hluav taws xob yog cov ntsev nitrate vim lawv cov ntsev ntsev tsawg, cov khoom siv thermophysical, tsis muaj vapor siab, siab ua haujlwm kub, kev ua haujlwm corrosion, thiab tsis muaj tshuaj lom.
Molten ntsev pab nce qhov kub siab tshaj qhov txwv nyob rau hauv uas cov kua hluav taws xob hloov mus rau cov khoom siv tuaj yeem siv tau. Txawm hais tias cov ntsev ib leeg tuaj yeem siv tau rau hauv cov ntawv thov no, kev sib xyaw ob cov ntsev ua ke pab txo qhov melting point. Qhov txo qis melting point ua rau qis qis qis ua haujlwm kub, uas txo qhov kev pheej hmoo ntawm kev khov.
Piv txwv li, lub melting point ntawm sodium nitrate yog 584 degree F los yog 307 degree, thiab lub melting point ntawm poov tshuaj nitrate yog 631 degree F los yog 333 degree. Ua ke, ob lub ntsev muaj qhov melting point ntawm 431 degree F lossis 222 degree. Qhov no melting point ho expands cov ntsev ua hauj lwm yooj yooj yim rau siv nyob rau hauv ntau yam high-temperature daim ntaub ntawv.
Yog tias daim ntawv thov ua haujlwm ntawm qhov kub siab tshaj 734 degree F lossis 390 degree thiab xav tau ib hom kua hluav taws xob hloov hluav taws xob, nws yuav tsum tau siv cov kua ntsev molten.