Cov ntsuas kev ua tau zoo ntawm cov tshuaj uas tsuas yog suav nrog tshuaj kom ruaj khov, cov khoom siv lub cev, melting point, purity thiab cov ntsiab lus sib xyaw. Cov xwm txheej ua tau zoo no cuam tshuam rau daim ntawv thov kev ua haujlwm thiab kev nyab xeeb ntawm cov tshuaj lom neeg.
Tshuaj lom neeg ruaj khov: Cov tshuaj ruaj khov ntawm cov tshuaj nyob rau hauv cov xwm txheej tshwj xeeb heev vim tias qhov khoom siv tau yooj yim vim tias muaj kev cuam tshuam rau nws ruaj khov thaum lub sijhawm cia thiab siv.
Cov Khoom Siv Lub Cev: suav nrog ceev, viscosity, melting point, thiab lwm yam. Piv txwv li, lub taw tes melting cuam tshuam rau cov khoom siv khaws cia thiab kev thauj mus los ntau ruaj khov nyob rau hauv ib puag ncig kub thiab qis dua yog qhov ntsuas kub.
Purity thiab cov ntsiab lus sib xyaw ua ke: muaj kev huv siab thiab ruaj khov cov ntsiab lus ua kom muaj cov txiaj ntsig ntawm cov tshuaj hauv kev thov. Cov txheej txheem ntau lawm thiab tswj cov tshuab tswj tau zoo tuaj yeem ua kom muaj kev ruaj ntseg ntawm cov ntsuas tseem ceeb.
Kev ua yeeb yam ib puag ncig: Hauv cov ntsiab lus ntawm kev tiv thaiv ib puag ncig ib puag ncig kev tiv thaiv ib puag ncig, kev ua haujlwm ib puag ncig ntawm cov tshuaj lom neeg kuj tau dhau los ua qhov kev txiav txim siab tseem ceeb. Cov khoom lag luam uas tau ntsib cov qauv kev tiv thaiv ib puag ncig tsis muaj kev cuam tshuam rau ib puag ncig thaum siv, uas yog nyob rau hauv txoj kab ke nrog lub tswv yim ntawm kev txhim kho kom ruaj khov.