Magnesium Oxide (MgO) Board: Cov yam ntxwv thiab cov luag haujlwm ua haujlwm

Kev ua tau zoo ntawm MgO boards (hluav taws kub tsis kam, noo noo tsis kam, siab zog, thiab lwm yam) stems los ntawm lawv cov kev tshawb fawb tsim cov khoom siv raw. Dominated los ntawm inorganic minerals, ntxiv los ntawm functional additives, thiab ntxiv dag zog rau cov khoom siv, MgO boards yog asbestos-dawb thiab formaldehyde-dawb, tsim nyog lawv raws li eco- phooj ywg ntsuab tsev ntaub ntawv. Lawv cov ntaub ntawv nyoos poob rau hauv peb pawg, nrog rau txhua qhov ua haujlwm sib txawv los txiav txim siab qhov kawg ntawm lub rooj tsavxwm.

1. Cov ntaub ntawv tseem ceeb: Lub Foundation ntawm Board Matrix

• Cov no yog cov khoom tseem ceeb tshaj plaws ntawm MgO boards, ncaj qha txiav txim siab lawv qhov kev ua tau zoo, thiab feem ntau muaj ob yam khoom:
• Lub teeb- hlawv Magnesium Oxide (MgO): Raws li "cov pob txha caj qaum" ntawm MgO cov laug cam, nws yog tsim los ntawm lub teeb calcination ntawm magnesite ntawm 700-900 degree, nrog rau purity yuav tsum feem ntau tshaj 85% (Ntau dua los yog sib npaug rau 90% rau siab- zoo boards). Nws yog ib qho active inorganic ntxhia uas ua rau muaj kev cuam tshuam hydration nrog kev hloov kho thaum raug dej, tsim cov khoom ruaj khov hydration uas tsim cov matrix nruj ntawm lub rooj tsavxwm. Meanwhile, nws endows lub rooj tsavxwm nrog hluav taws tsis kam thiab siab - kub kam rau ua.
• Modifiers (Magnesium Sulfate / Magnesium Chloride): Ua raws li "kho cov neeg koom tes" ntawm magnesium oxide, lawv tau muab faib ua magnesium sulfate thiab magnesium chloride hom, nrog rau txhua hom tsim nyog rau cov ntawv thov sib txawv.
• Magnesium Sulfate: Cov khoom hydration tsim los ntawm nws cov tshuaj tiv thaiv nrog magnesium oxide muaj kev ruaj ntseg dua, huab cua tsis zoo, thiab tiv thaiv - cov khoom efflorescence. Nws yog qhov zoo tagnrho rau kev tsim cov phab ntsa sab nrauv MgO boards, tiv thaiv cov teeb meem xws li efflorescence deg thiab noo noo rov qab nyob rau hauv qhov chaw ntub dej.
• Magnesium Chloride: Nws ua rau cov tshuaj tiv thaiv hydration ceev, siab board tsim efficiency, thiab tus nqi qis, tab sis muaj cov dej tsis muaj zog me ntsis. Nws feem ntau yog siv rau sab hauv phab ntsa MgO boards.

2. Cov Khoom Siv Ntxiv: Cov Ntsiab Cai rau Kev Ua Haujlwm Zoo Tshaj Plaws
Accounting for a small proportion, these materials can targetedly improve the density, toughness, water resistance, and other shortcomings of the board. Cov hom muaj xws li:

• Lightweight Fillers: Mainly perlite, fly ash, and diatomite, they reduce board density and weight (30%–40% lighter than traditional cement boards), while enhancing thermal insulation performance. Tsis tas li ntawd, lawv txo cov khoom siv raw thiab tswj cov nqi tsim khoom.
• Waterproof Modifiers: Xws li silicone emulsion thiab stearate, lawv sau cov pores me me hauv lub rooj tsavxwm, txo cov dej nqus dej, txhim khu kev ya raws thiab dej tsis kam, thiab tiv thaiv lub rooj tsavxwm los ntawm softening thiab deforming nyob rau hauv qhov chaw ntub dej.
• Toughening Agents: Xws li cov ntoo fiber ntau thiab polypropylene fiber ntau, lawv tau sib cais nyob rau hauv lub rooj tsavxwm matrix, txhim kho kev sib tsoo thiab kev cuam tshuam, thiab zam kev tawg tawg thaum thauj thiab teeb tsa.

3. Cov khoom siv txhawb zog: Lub cev pob txha txhawm rau txhim kho kev ua kom muaj zog

• Feem ntau alkali-resistant fiberglass mesh, ua "cov leeg nqaij thiab pob txha" ntawm MgO boards, nws yog siv rau hauv ib qho - txheej thiab ob npaug - txheej txheej:
• Ordinary sab hauv phab ntsa MgO boards feem ntau txais yuav ib qho - txheej fiberglass mesh los muab kev txhawb nqa yooj yim thiab kev tiv thaiv tawg.
• Sab nrauv phab ntsa MgO boards los yog thickened load-cov kab nrib pleb siv ob- txheej fiberglass mesh (ib txheej ntawm txhua sab), uas txhim kho qhov flexural thiab dabtsi yog khoov lub zog ntawm lub rooj tsavxwm, kom ntseeg tau tias nws tsis yooj yim rau deformation thiab tawg thaum lub sij hawm ntev - siv.
• Lub fiberglass mesh yuav tsum muaj alkali tsis kam tiv thaiv corrosion los ntawm alkaline ib puag ncig ntawm magnesium cement, yog li ua kom lub zog ntawm cov khoom siv dag zog.

4. Qhov tseem ceeb ntawm Raw Material Ratio
Qhov zoo ntawm MgO boards tsis yog txiav txim los ntawm ib qho khoom siv, tab sis cia siab rau qhov tseeb molar piv ntawm magnesium oxide rau kev hloov pauv (feem ntau 6-8: 1). Kev sib piv tsis sib haum tuaj yeem ua rau muaj teeb meem xws li efflorescence, warping, thiab tsis muaj zog. Piv txwv li, cov phab ntsa sab nrauv siv siab -purity magnesium oxide, magnesium sulfate ua tus hloov kho, thiab nce fiberglass mesh ceev kom hloov mus rau qhov nyuaj sab nraum zoov kub thiab av noo; Sab hauv phab ntsa boards tuaj yeem kho qhov sib piv kom sib npaug ntawm kev ua haujlwm thiab tus nqi.