Cov khoom
(1) Tsis tshua muaj neeg thermal-expound coefficient, vim li no nws muaj qhov tho kev thermostablility zoo heev uas tsis muaj kev cuam tshuam rau hauv siab kub hnyiab, txawm tias nyob hauv qhov chaw oxidized nws yuav raug siv ntau lub peev xim ntau dua 1100 ° C ib puag ncig
(2) Nrog rau kev nplua inoxidizability, qhov khoom ntws muaj cov khoom ruaj nrawm heev.
(3) High-purity ntawm cov tshuaj lom neeg muaj pes tsawg leeg, yog li ua kom tsis txhob muaj cov khoom sib txuam ntawm cov khoom thiab qhov zoo ntawm cov pa phem.
(4) Qhov tsis tshua muaj zog ntawm lub cev muaj zog ruaj khov rau kev ua haujlwm ruaj khov nyob rau hauv ambient tempereture thiab kev ua haujlwm kub thaj chaw, nrog me me ua siab dav thiab zoo heev, tus nplaig zoo, Nrog lub siab khov qav taub, tus naj npawb ntawm tus naj npawb thiab kev soj ntsuam zoo. peb cov khoom muaj cov tswv yim.