Barium hlau

Barium hlau
Barium, hlau

 
Tus qauv qauv:Ba
【Molecular Luj】137.33 Nws
[Physical and Chemical Properties] Yellow silver white soft metal. Tus txheeb ze ceev 3.62, melting point 725 ℃, boiling point 1640 ℃. Lub cev nruab nrab kub: α = 0.5025nm. Melting cua sov 7.66kJ / mol, vaporization tshav kub 149.20kJ / mol, vapor siab 0.00133kpa (629 ℃), 1.33kPa (1050 ℃), 101.3kPa (1640 ℃), resistivity 29.4u Ω· cm 1.0 electronegativity Ba2 + muaj lub vojvoog ntawm 0.143nm thiab thermal conductivity ntawm 18.4 (25 ℃) W / (m · K). Linear expansion coefficient 1.85 × 10-5 m / (M · ℃). Nyob rau hauv chav tsev kub, nws yooj yim reacts nrog dej tso tawm hydrogen gas, uas yog me ntsis soluble nyob rau hauv cawv thiab insoluble nyob rau hauv benzene.
[Cov Qauv Zoo]Cov qauv siv
【Application】Siv dav hauv degassing alloys, suav nrog txhuas, calcium, magnesium, sodium, lithium, aluminium, thiab nickel alloys. Siv los ua cov tshuaj tua hluav taws kom tshem tawm cov kab hluav taws xob uas nyob hauv lub tshuab nqus tsev vacuum, thiab tseem siv los tsim cov ntsev barium.
Aluminium thermal txo txoj kev: Barium nitrate yog thermally decomposed los tsim barium oxide. Fine grained aluminium yog siv los ua tus neeg sawv cev txo qis, thiab qhov piv ntawm cov khoom xyaw yog 3BaO: 2A1. Barium oxide thiab txhuas yog thawj zaug ua pellets, uas tom qab ntawd muab tso rau hauv ib qho tseem thiab rhuab mus rau 1150 ℃ rau txo distillation purification. Lub purity ntawm lub resulting barium yog 99%.
【Kev nyab xeeb】Plua plav yog ib qho yooj yim rau combustion nyob rau hauv lub chav tsev kub thiab yuav ua rau combustion thiab tawg thaum raug tshav kub, nplaim taws, los yog tshuaj loog. Nws yog nquag rau dej decomposition thiab reacts hnyav nrog acids, tso hydrogen gas uas yuav ignited los ntawm tshav kub ntawm cov tshuaj tiv thaiv. Kev ntsib cov tshuaj fluorine, chlorine, thiab lwm yam tshuaj tuaj yeem ua rau muaj kev phom sij heev. Barium hlau reacts nrog dej los tsim barium hydroxide, uas muaj corrosive nyhuv. Nyob rau tib lub sijhawm, dej-soluble barium ntsev yog tshuaj lom heev. Cov tshuaj no yuav ua rau muaj kev phom sij rau ib puag ncig, nws raug nquahu kom tsis txhob cia nws nkag mus rau ib puag ncig.
Hazard code: Flammable substance in contact with noo noo. GB 4.3 Chav Kawm 43009. UN No. 1400. IMDG CODE 4332 nplooj ntawv, Chav Kawm 4.3.
Thaum noj nws yuam kev, haus dej sov kom ntau, ua kom ntuav, ntxuav lub plab nrog 2% mus rau 5% sodium sulfate tov, ua rau raws plab, thiab nrhiav kev kho mob. Kev nqus plua plav tuaj yeem ua rau lom. Cov neeg mob yuav tsum tau muab tshem tawm ntawm qhov chaw muaj kab mob, so, thiab ua kom sov; Yog tias ua tsis taus pa, ua pa ua pa tam sim ntawd thiab nrhiav kev kho mob. Kev sib tsoo ntawm qhov muag, yaug nrog dej kom ntau, nrhiav kev kho mob hauv qhov mob hnyav. Kev sib cuag ntawm daim tawv nqaij: yaug nrog dej ua ntej, ces ntxuav nrog xab npum. Yog tias kub hnyiab, nrhiav kev kho mob. Tam sim ntawd yaug koj lub qhov ncauj yog tias noj los ntawm qhov yuam kev thiab nrhiav kev kho mob sai.
Thaum tuav barium, nws yog ib qho tsim nyog los ntxiv dag zog rau kev tiv thaiv kev nyab xeeb ntawm cov neeg ua haujlwm. Tag nrho cov pov tseg yuav tsum tau kho nrog ferrous sulfate los yog sodium sulfate los hloov cov tshuaj lom barium ntsev rau hauv cov dej tsis muaj barium sulfate.
Cov neeg ua haujlwm yuav tsum hnav lub ntsej muag lub ntsej muag plua plav plua plav, tshuaj tiv thaiv tsom iav, tshuaj tiv thaiv khaub ncaws, thiab hnab looj tes roj hmab. Khaws kom deb ntawm qhov hluav taws kub thiab cua sov, thiab txwv tsis pub haus luam yeeb hauv chaw ua haujlwm. Siv cov tshuab ua pa tawm thiab cov khoom tawg. Tsis txhob sib cuag nrog oxidants, acids, thiab bases, tshwj xeeb tshaj yog nrog dej.
Khaws rau hauv kerosene thiab kua paraffin, ntim rau hauv iav fwj nrog airtight sealing, nrog ib tug luj ntawm 1kg ib lub raj mis, thiab ces concentrated nyob rau hauv cov thawv ntoo lined nrog padding. Yuav tsum muaj daim ntawv qhia meej "Cov Khoom Hluav Taws Xob Hauv Kev Sib cuag nrog Cov Dej" ntawm lub ntim, nrog rau daim ntawv thib ob ntawm "Cov Khoom Siv Hluav Taws Xob".
Khaws rau hauv qhov chaw txias, qhuav, thiab qhov cua uas tsis muaj hluav taws kub. Khaws kom deb ntawm qhov chaw kub thiab hluav taws kub, tiv thaiv kom tsis txhob ya raws, thiab tiv thaiv lub thawv puas. Tsis txhob kov cov dej, kua qaub, lossis oxidants. Sib cais los ntawm cov organic teeb meem, combustibles, thiab yooj yim oxidizable tshuaj rau cia thiab tsheb thauj mus los, thiab thauj tsis tau nyob rau hnub los nag.
Nyob rau hauv cov ntaub ntawv ntawm hluav taws kub, qhuav xuab zeb, qhuav graphite hmoov los yog qhuav hmoov extinguisher yuav siv tau los tua hluav taws, thiab dej, ua npuas ncauj, carbon dioxide los yog halogenated hydrocarbon extinguishing tus neeg saib xyuas (xws li 1211 extinguishing agent) tsis pub.