Inorganic Cementitious Curing Mechanism ntawm MGO Boards

Lub ntsiab lus xaus: Cov txiaj ntsig tseem ceeb ntawm MGO boards, xws li hluav taws kub tsis kam, noo noo tsis kam, thiab ib puag ncig tus phooj ywg, tag nrho cov qia los ntawm cov dej kho cov tshuaj tiv thaiv ntawm inorganic cementitious system raws liteeb - hlawv magnesium oxide (MgO). Ib qho ruaj khov crystalline network qauv yog tsim los ua kom muaj kev sib koom ua ke ntawm pawg thawj coj saib lub zog thiab huab cua tsis kam.

I. Core Raw Material Composition ntawm Curing Reaction

Lub cementitious system ntawm MGO boards muaj peb lub hauv paus tseem ceeb:

Khoom siv hauv paus: Lub teeb - hlawv Magnesium Oxide (MgO)Ua los ntawm calcining magnesite (MgCO₃) ntawm qhov kub thiab txias ntawm 700-900 degree, nws ua lub hauv paus rau cov tshuaj tiv thaiv cementitious. Cov kev ua ntawm lub teeb - hlawv magnesium oxide ncaj qha txiav txim siab kho nyhuv. Kev ua haujlwm tsis txaus yuav ua rau lub rooj tsavxwm tsis tshua muaj zog thiab muaj kev cuam tshuam rau efflorescence, thaum kev ua haujlwm siab heev yuav ua rau kom nrawm nrawm, ua rau lub nkoj tawg.

Modulator: Magnesium ntsev tov (Magnesium Chloride / Magnesium Sulfate)

Magnesium Chloride (MgCl₂): Qhov feem ntau siv modulator, uas ua rau kom cov tshuaj tiv thaiv dej thiab txhim kho lub zog thaum ntxov ntawm lub rooj tsavxwm. Txawm li cas los xij, nws cov dej tsis kam yog qhov tsis muaj zog, yog li nws yuav tsum tau siv nrog cov dej tsis zoo.

Magnesium Sulfate (MgSO₄): Nta cov dej tsis zoo, ua rau nws haum rau cov av noo thiab siab -cov av noo daim ntawv thov scenarios xws li cov tsev nyob hauv ntug dej hiav txwv thiab hauv qab daus, tab sis nrog kev kho qeeb me ntsis.

DejUa raws li cov tshuaj tiv thaiv nruab nrab los koom rau hauv cov tshuaj tiv thaiv hydration, thiab kho cov slurry sib xws kom yooj yim molding thiab ua.

Ntxiv rau,reinforcing fibers (piv txwv li, iav fiber, cog fiber ntau)ntxiv rau lub rooj tsavxwm los txhim kho flexural zog, thiabfillers (piv txwv li, ya tshauv, talcum hmoov)yog incorporated los txo cov nqi thiab optimize molding kev ua tau zoo.

II. Cov txheej txheem tseem ceeb ntawm kev kho cov tshuaj tiv thaiv

Kev kho ntawm MGO boards yog ib qho rauginorganic hydration crystallization cov tshuaj tiv thaiv, es tsis yog lub cev sib txuas ntawm cov organic adhesives, uas tau muab faib ua ob theem:

Kauj Ruam 1: Hydration Reaction of Light- burned Magnesium OxideThaum lub teeb - hlawv magnesium oxide ntsib dej, nws thawj zaug ua rau tsim magnesium hydroxide (Mg(OH)₂), nrog rau cov tshuaj sib npaug raws li hauv qab no: MgO + H2O=Mg(OH) 2​ kauj ruam no tso tawm cov cua sov me me, thiab magnesium hydroxide yog nyob rau hauv ib lub xeev colloidal, cov tshuaj tiv thaiv subsequel.

Kauj ruam 2: Tsim thiab Network Hla - txuas ntawm Hydrated Magnesium Salt Crystalline PhasesCov colloidal magnesium hydroxide tau dhau los ua cov tshuaj tiv thaiv complexion nrog magnesium ntsev nyob rau hauv lub modulator kom ruaj khovhydrated magnesium ntsev crystalline theem, cov uas yog5·1·8 theem (5Mg(OH)₂·MgCl₂·8H₂O)thiab3·1·8 theem (3Mg(OH)₂·MgSO₄·8H₂O).

Cov txheej txheem crystalline no yog acicular lossis fibrous, thiab lawv interpenetrate thiab interweave nrog ib leeg los ua ib tug tuab peb -sib nqus qauv network, uas khov kho qhwv thiab bonds lub reinforcing fibers thiab muab tub lim, thaum kawg tsim siab -MGO boards.

III. Kev sib raug zoo ntawm Curing Mechanism thiab Core Performance of Board

Nws yog qhov tseeb no inorganic crystalline network qauv uas endows MGO boards nrog tshwj xeeb zoo dua organic boards:

Hluav taws kub Resistance thiab nplaim taws RetardancyCov theem inorganic crystalline lawv tus kheej tsis yog -combustible thiab tsis tso cov pa phem rau ntawm qhov kub thiab txias. Thaum raug hluav taws kub, tsuas yog lub cev sintering tshwm sim tsis muaj melting thiab dripping, ntsib lubQib A1 tsis yog- tus qauv hluav taws kub.

Moisture Resistance thiab Dej ResistanceCov qauv crystalline ruaj khov yog insoluble hauv dej thiab yuav tsis muag los yog deform vim dej nqus. Tshwj xeeb, MGO boards nrog magnesium sulfate-modulated system muaj qhov tsis tshua muaj zog poob qis hauv qhov chaw ntub dej, ua rau lawv tsim nyog rau qhov chaw siab - av noo.

Environmental Friendliness thiab formaldehyde - khoom pub dawbTsis muaj cov organic adhesives ntxiv thoob plaws hauv cov txheej txheem, tsim kev tshem tawm cov pa phem xws li formaldehyde thiab benzene, thiab ua raws li qib E0 lossis ntau dua ib puag ncig cov qauv.

Huab cua ruaj ntsegCov qauv inorganic crystalline theem ruaj khov, tsis yooj yim cuam tshuam los ntawm ultraviolet rays thiab kub hloov, thiab yuav tsis muaj kev laus, chalking, los yog deformation thaum lub sij hawm ntev - siv.

IV. Cov ntsiab lus tseem ceeb hauv kev tsim khoom tiag

Cov nyhuv ntawm cov tshuaj tiv thaiv curing ncaj qha txiav txim siab lub rooj tsavxwm zoo, thiab cov ntsiab lus tseem ceeb hauv qab no yuav tsum tau tsom mus rau thaum lub sijhawm tsim khoom:

Kev ua ntawm Lub Teeb- hlawv Magnesium Oxide: Tshuaj ntsuam cov ntaub ntawv raw los ntawm kev ntsuam xyuas cov txiaj ntsig kev ua haujlwm (xws li, citric acid tus nqi) kom paub meej cov tshuaj tiv thaiv txaus.

Qhov piv ntawm Magnesium ntsev rau Magnesium Oxide: nruj me ntsis tswj cov molar ratio kom tsis txhob muaj teeb meem xws li "efflorescence" (dawb ntsev deposits rau saum npoo) los yog "blooming" tshwm sim los ntawm unbalanced ratios.

Kev Kho Mob: Lub rooj tsavxwm yuav tsum tau kho nyob rau hauv ib puag ncig nrog qhov kub thiab txias ntawm 20-25℃thiab cov av noo ntawm 60% -70% rau 7-14 hnub kom ua tiav cov tshuaj tiv thaiv crystallization thiab txhim kho lub zog thiab ruaj khov.