Lithium hydride CAS 7580-67-8 99% purity ua tus neeg sawv cev txo qis
Kev piav qhia txog khoom
Lithium hydride yog ib qho khoom dawb dawb mus rau greyish, translucent, tsis muaj ntxhiab lossis hmoov dawb uas tsaus sai sai thaum raug lub teeb. Qhov hnyav molecular = 7.95; Specific gravity (H2O: 1) = 0.78; Boiling point = 850 ℃ (decomposes qis dua BP); Freezing/Melting point = 689 ℃; Autoignition temperature = 200 ℃. Kev txheeb xyuas kev phom sij (raws li NFPA-704 M Rating System): Kev Noj Qab Haus Huv 3, Flammability 4, Reactivity 2. Ib qho khoom kub hnyiab uas tuaj yeem tsim cov huab cua plua plav uas yuav tawg thaum kov nrog nplaim taws, cua sov, lossis oxidizers.
Cov Khoom Siv
Lithium hydride (LiH) yog ib yam khoom siv ntsev crystalline (lub ntsej muag-centered cubic) uas yog dawb hauv nws daim ntawv ntshiab, Raws li cov khoom siv engineering, nws muaj cov khoom ntawm kev txaus siab rau ntau yam thev naus laus zis. Piv txwv li, cov ntsiab lus hydrogen siab thiab lub teeb yuag ntawm LiH ua rau nws muaj txiaj ntsig zoo rau neutron shields thiab moderators hauv nuclear fais fab nroj tsuag. Tsis tas li ntawd, qhov kub siab ntawm fusion ua ke nrog lub teeb yuag ua rau LiH tsim nyog rau cov khoom siv khaws cia cua sov rau lub hnub ci fais fab nroj tsuag ntawm satellites thiab tej zaum yuav siv tau ua lub dab dej kub rau ntau daim ntawv thov. Feem ntau, cov txheej txheem rau kev tsim cov LiH cuam tshuam nrog kev tuav ntawm LiH ntawm qhov kub siab dua nws qhov meltingpoint (688 DC). Hom 304L stainless hlau yog siv rau ntau cov txheej txheem khoom tuav cov molten LiH.
Lithium hydride yog ib qho ionic hydride uas muaj lithium cations thiab hydride anions. Electrolysis ntawm cov khoom molten ua rau muaj lithium hlau ntawm cathode thiab hydrogen ntawm anode. Cov tshuaj tiv thaiv lithium hydride-water, uas ua rau muaj cov pa hydrogen, kuj qhia txog hydrogen uas muaj cov nqi tsis zoo.
Lithium hydride yog ib qho dawb tawm mus rau greyish, translucent, tsis muaj ntxhiab khoom lossis hmoov dawb uas tsaus sai sai thaum raug lub teeb. Lithium hydride ntshiab tsim cov xim tsis muaj xim, cubic crystals. Cov khoom lag luam muaj cov cim ntawm cov khoom tsis huv, piv txwv li, cov hlau lithium tsis tau ua haujlwm, thiab yog li ntawd lub teeb grey lossis xiav. Lithium hydride yog thermally ruaj khov heev, yog tib qho ionic hydride uas yaj tsis muaj decomposition ntawm atmospheric siab (mp 688 ℃). Nyob rau hauv sib piv rau lwm cov alkali hlau hydrides, lithium hydride yog me ntsis soluble nyob rau hauv inert polar organic solvents xws li ethers. Nws tsim eutectic sib xyaw nrog ntau tus ntsev. Lithium hydride yog ruaj khov nyob rau hauv qhuav huab cua tab sis ignites ntawm nce kub. Nyob rau hauv noo noo huab cua nws yog hydrolyzed exothermically; finely faib cov khoom tuaj yeem ignite spontaneously. Thaum siab kub, nws reacts nrog oxygen los tsim lithium oxide, nrog nitrogen los tsim lithium nitride thiab hydrogen, thiab nrog carbon dioxide los tsim lithium formate.
Daim Ntawv Thov
Lithium hydride yog siv rau hauv kev tsim cov lithium txhuas hydride thiab silane, ua tus neeg sawv cev txo qis muaj zog, ua tus neeg sawv cev condensation hauv organic synthesis, ua qhov chaw nqa tau ntawm hydrogen, thiab ua cov khoom siv tiv thaiv nuclear uas tsis hnyav. Tam sim no nws raug siv rau kev khaws cia lub zog thermal rau cov kab ke fais fab space.
Lithium hydride yog ib hom siv lead ua xim xiav dawb uas yooj yim hlawv thaum muaj dej noo. Siv ua ib qho chaw tsim cov roj hydrogen uas tawm los thaum LiH ntub. LiH yog ib qho tshuaj desiccant thiab reducing agent zoo heev thiab yog ib qho tiv thaiv uas tiv thaiv tau hluav taws xob los ntawm cov tshuaj tiv thaiv nuclear.
Ntim Khoom & Khaws Cia
Ntim: 100g / thawv; 500g / thawv; 1kg ib lub thawv; 20kg ib lub nruas hlau
Kev Khaws Cia: Nws tuaj yeem khaws cia rau hauv cov kaus poom hlau nrog lub hau sab nraud rau kev tiv thaiv, lossis hauv cov thoob hlau kom tiv thaiv kev puas tsuaj. Khaws cia rau hauv qhov chaw sib cais, txias, qhuav thiab muaj cua nkag zoo, thiab tiv thaiv kom tsis txhob muaj dej noo. Cov tsev yuav tsum muaj cua nkag zoo thiab tsis muaj roj sib sau ua ke.
Cov ntaub ntawv txog kev thauj mus los
Tus lej UN: 1414
Chav Kawm Txaus Ntshai: 4.3
Pawg Ntim Khoom: Kuv
Tus lej HS: 28500090
Cov Lus Qhia Tshwj Xeeb
| Lub Npe | Lithium hydride | ||
| CAS | 7580-67-8 | ||
| Cov khoom | Tus Qauv | Cov txiaj ntsig | |
| Qhov tsos | Cov hmoov crystalline dawb tawm | Ua raws li | |
| Kev Ntsuas,% | ≥99 | 99.1 | |
| Xaus lus | Tsim nyog | ||
