Magnesium oxide: Properties, Preparation, kushanda

Magnesium oxide inowanzonzi akataura zvakawanda nyore zvinopiswa magnesia kana magnesium oxide. Ichi acho lightweight uye wakanaka crystalline chena upfu. Zvakasikwa, ari magnesium oxide kunoitika sezvo zvicherwa periclase. Zvokudya indasitiri ndiyo fuma inozivikanwa zvokudya chirungiso pasi bumbiro E530.

Properties kuti magnesium oxide

Chemical Formula yacho pfuma: MgO. remubatanidzwa Izvi zvinenge hapana hwema muna amoniya uye asidhi iri nyore soluble nemvura, solubility zvaro 30 ° C ndiyo magiramu 0,0086 chete / 100 ml, uye doro uye haina nyunguduka. Matadza guru MgO - 40,3044 g / mol. At 20 ° C uye ayo arambe achirema ndiyo 3,58 g / cm³, achibika tembiricha - 3600 ° C, kubvunda - 2852 ° C. Melkokristallichesky magnesium oxide iri mishonga chaizvo. It anokwanisa rokutora carbon dioxide inobvisa kuumba runoenzanirana carbonate:

• MgO + CO ₂ = MgCO _3;

kunyange zvishoma nezvishoma, asi achiri zvaanoita nemvura, achiumba insoluble simba nechigadziko :

• H ₂ O + MgO = MG (OH) _2;

iri vakaita ane asidhi:

• 2HCl + MgO = MgCl ₂ + H ₂ O

The calcined magnesium oxide anorasikirwa reactivity kwayo. Zvinofanira akawedzera kuti ichi upfu gigroskopechen.

Kugadzirira magnesium oxide

Muna indasitiri, mukomboni ichi rakagadzirirwa chaizvoizvo kupfurikidza vachiridzira. Yakatsvuka zvakashandiswa zvicherwa zvakadai dolomite (MgCO3.CaCO3) kana magnesia (MgCO3). Uyezve, magnesia rinoitwa uchishandisa calcination bishofit (MgCl ₂ X 6 ₂ O) mumvura mhute, calcining MG (OH) 2 uye vamwe kusagadzikana kuti tembiricha MG yeimwe. Under Murabhoritari mamiriro, MgO vanogona wakagadzirwa zvingaitwa yaro constituent zvinoriumba:

• 2Mg + O ₂ = 2MgO;

kana chafariz manyowa zvimwe munyu kana hydroxide:

• MgCO ₃ = MgO + CO _2.

Zvichienderana kugadzirwa nzira magnesium oxide itsika kusiyanisa nezvemarudzi maviri chikuru yeimwe: chiedza uye rinorema magnesia. Wokutanga ndiwo Hauoneki upfu, riri nyore kupinda siyana maitiro pamwe sanganisa acids, zvawakabudiswa nazvo MG munyu vari aumba. Yechipiri ine guru crystals inoitika kana chakaita zvokugadzirwa periclase uye vaikudzwa mvura nemishonga uye zvakawanda inert.

Magnesium oxide

Muna indasitiri, mukomboni iri kushandiswa mukugadzira simende, refractory, sezvo filler mu rabha uye kunorapwa chicherwa mafuta. Ultralight magnesium oxide rinoshandiswa wakanaka chaizvo hasha, rakanga anatswa pemvura. Zvikurukuru, rinoshandiswa mune iri Electronics indasitiri. Uyezve, magnesia zvinowanzodavirwa inoshandiswa mukurapa. Where MgO rinoshandiswa zvaipesana gastric acidity pamwero yokuvamba nokuda kwazvo pamusoro hydrochloric acid. Magnesium oxide uyewo nokuda neutralizing vanoshingaira zvinhu netsaona abatwa mudumbu. In zvokudya indasitiri MgO rinoshandiswa sezvokudya chirungiso (E530) code, izvo kunotadzisa clumping uye caking. Magnesia rinoshandiswawo jimunasitikisi. Pano, madota rinoshandiswa mumaoko vatambi kuonana navo muviri midziyo yaiva yakavimbika. Wedzera kuti magnesium oxide iMhedziso_ reflector. Kuratidzwa coefficient zviri pafuma iri kwenguva spectral boka akaenzana kubatana uye saka angatitungamirira kushandiswa senzvimbo chena bhuku.