Koob zoo li Mullite Crystals uas Confer High Melting Point, Tsawg Reversible Thermal Expansion Thiab Zoo heev Resistance rau Thermal Shock Rau Fused Mullite

Corundum ntau yam
High-purity fused mullite
Electro-fused mullite

Qhia luv luv

Fused Mullite yog tsim los ntawm Bayer txheej txheem alumina thiab siab purity quartz xuab zeb thaum fusing nyob rau hauv super-loj hluav taws xob arc rauv.

Nws muaj cov ntsiab lus siab ntawm rab koob zoo li mullite crystals uas muaj siab melting point, tsis tshua muaj reversible thermal expansion thiab zoo heev tiv thaiv thermal shock, deformation nyob rau hauv load, thiab tshuaj corrosion ntawm kub.

Hu rau tam sim no

Fused Mullite 75

Cov khoom		Chav tsev	Index	Hom
Tshuaj muaj pes tsawg leeg	Al₂O₃	%	73.00-77.00 Nws	73.90 ib
	SiO₂	%	22.00-29.00 Nws	24.06 Nws
	Fe₂O₃	%	0.4 max (Fines 0.5% max)	0.19 ib
	K2O + Na₂O	%	0.40 max	0.16
	CaO + MgO	%	0.1% max	0.05 Nws
Refractoriness		℃	1850 min
Qhov ntom ntom		g/cm³	2.90 min	3.1
Cov ntsiab lus iav theem		%	10 max
3 Al₂O₃.2 TSI₂Theem		%	90 nqi

F-Fused; M-Mullite

Fused Mullite 70

Cov khoom		Chav tsev	Index	Hom
Tshuaj muaj pes tsawg leeg	Al₂O₃	%	69.00-73.00 Nws	70.33 ib
	SiO₂	%	26.00-32.00 Nws	27.45 Nws
	Fe₂O₃	%	0.6 max (Fines 0.7% max)	0.23
	K2O + Na₂O	%	0.50 max	0.28 ib
	CaO + MgO	%	0.2% max	0.09 ib
Refractoriness		℃	1850 min
Qhov ntom ntom		g/cm³	2.90 min	3.08 Nws
Cov ntsiab lus iav theem		%	15 max
3 Al₂O₃.2 TSI₂Theem		%	85 nqi

Txheej Txheem Ntau Lawm

Fused Mullite yog tsim los ntawm Bayer txheej txheem alumina thiab siab purity quartz xuab zeb thaum fusing nyob rau hauv super-loj hluav taws xob arc rauv.

Daim ntawv thov

Nws yog dav siv los ua cov ntaub ntawv raw rau qib siab refractories, xws li hauv ob sab phlu cib hauv iav kiln rauv thiab cib siv hauv cov cua kub cua sov hauv kev lag luam steel.

Nws kuj tseem siv hauv Ceramic kiln thiab petrochemical kev lag luam thiab ntau lwm yam kev siv.

Fused Mullite nplua yog siv nyob rau hauv Foundry coatings rau nws thermal shock resistance thiab non-wettability zog.

Nta

• Siab thermal stability
• Tsawg reversible thermal expansion
• Tiv thaiv slag nres ntawm qhov kub thiab txias
• Cov tshuaj lom neeg ruaj khov

Mullite, ib yam ntawm cov ntxhia tsis tshua muaj xws li txhuas silicate (3Al2O3·2SiO2). Nws yog tsim los ntawm firing aluminosilicate raw cov ntaub ntawv thiab yog qhov tseem ceeb tshaj plaws ntawm ceramic whiteware, porcelains, thiab high-temperature insulating thiab refractory cov ntaub ntawv. Cov khoom sib xyaw, xws li mullite, muaj qhov sib piv ntawm alumina-silica tsawg kawg yog 3: 2 yuav tsis yaj hauv qab 1,810 ° C (3,290 ° F), hos cov uas muaj qhov sib piv qis dua ib nrab yaj ntawm qhov kub thiab txias li 1,545 ° C (2,813 ° C). F).

Ntuj mullite tau tshawb pom li dawb, elongated crystals ntawm Island of Mull, Inner Hebrides, Scot. Nws tau raug lees paub tsuas yog nyob rau hauv fused argillaceous (clayey) enclosures nyob rau hauv intrusive igneous pob zeb, ib qho xwm txheej uas qhia tias kub heev ntawm kev tsim.

Dhau li ntawm nws qhov tseem ceeb rau cov pa ceramics, mullite tau dhau los ua ib qho kev xaiv ntawm cov khoom siv rau kev ua haujlwm siab thiab ua haujlwm ceramics vim nws cov khoom zoo. Qee cov khoom zoo ntawm mullite yog cov thermal expansion, tsis tshua muaj thermal conductivity, zoo heev creep kuj, high-temperature zog, thiab zoo tshuaj stability. Cov txheej txheem ntawm kev tsim mullite nyob ntawm txoj kev sib txuas cov alumina- thiab silica-muaj reactants. Nws kuj tseem cuam tshuam txog qhov kub thiab txias uas cov tshuaj tiv thaiv ua rau kev tsim ntawm mullite (mullitisation kub). Mullitisation kub tau raug tshaj tawm tias txawv ntawm ntau pua degrees Celsius nyob ntawm seb txoj kev siv hluavtaws siv.