Brick of corundum of electric frit zirconium

The generation when be being used about brick of corundum of electric frit zirconium enrages the research of bubble, have unanimous verdict almost: Gas of the generation inside brick of corundum of electric frit zirconium is the impetus of vitreous photograph dialysis, and vitreous photograph is oozy generate bubble in the interface again.
The account that produces bleb thinks to have two commonly, it is the impurity such as carbon, carbide, sulfur and sulfide is contained in brick of corundum of electric frit zirconium, in brick of corundum of electric frit zirconium diffusing as a result of oxygen in using a process, with these foreign matter reacts, give off CO2, SO2, n2, confirm in what have oxygen the condition issues ability of this kind of process to arise. The impurity that give out reacts temperature is: Sulfide and oxygen reaction temperature are 200 ℃ carbide and the temperature that oxygen reacts to begin from 400 ℃ , nitride reaction temperature, 800 ℃ above. Because the batteries between fluid of the glass in dissolve pool and brick of corundum of electric frit zirconium reacts,another account that produces bleb is.

Alkaline content differs between fluid and brick of corundum of electric frit zirconium and batteries electromotive force is caused by glass, contain alkali number to compare tall Na+ to diffuse to brick of corundum of electric frit zirconium, tend with the Na+ in brick of corundum of electric frit zirconium evenly, make vitreous fluid and place of interface of brick of corundum of electric frit zirconium form the lopsided state of oxygen excessive, the oxygen below lopsided condition forms bleb, once achieve balance criterion bleb,generation stops namely.
Afore-mentioned research explain as a result, foreign matter and bleb of oxygen reaction generation are the impetus of vitreous photograph dialysis. So the matter content in reducing composition will be the basic method that solves a problem. Notable is there cannot be a bit impurity in raw material, be opposite especially brick of corundum of zirconium of 33# report frit, should pay attention to research to this kind of circumstance so how slow down and even avoid generation of this kind of bleb, temperature of dialysis of photograph of actual measurement glass is low for 1030 ℃ , it is 1470 ℃ high, and temperature of reaction of foreign matter oxidation is low for 200 ℃ , also have 800 ℃ high only, visible oxidation reaction is advanced, vitreous photograph dialysis is in hind. Consequently oxygen diffuses mediumly to make the payoff that this kind of bleb produces to brick of corundum of electric frit zirconium.
Oxygen diffuses to the middle of brick of corundum of electric frit zirconium the crackle that the passageway can be brick of corundum of electric frit zirconium, stomatic (connect blowhole especially, also can be the vitreous photograph in brick of corundum of electric frit zirconium, obvious diffuses formerly speed is more than latter far. Because batteries reacts in corundum of electric frit zirconium the brick counteracts the bubble that vitreous fluid interface generates, cannot be the impetus of vitreous photograph dialysis, it is vitreous fluid the result that erodes to brick of corundum of electric frit zirconium. Bleb measures more or less to mix generation speed, depend on of the lopsided level of Na+ and Na+ diffuse speed. The chroma difference of Na+ can be reduced gradually, the hinge that so this kind of bleb produces is Na+ diffuse speed, and of Na+ diffuse speed depends on again diffuse passageway and obstruction size.
By afore-mentioned analysises knowable, the substance that two kinds of bleb produce is the Na+ that oxygen mixes diffuses, everything raises oxygen, diffuse the measure of obstruction is effective. One of measure are the compact sex that raises surface layer of brick of corundum of electric frit zirconium, with increasing oxygen diffuse obstruction, have good performance the special structure of its surface layer also is main reason; Of measure is consider and improve vitreous photograph to distributing mediumly to retain position with the ode of brilliant alternate with in brick of corundum of electric frit zirconium, make vitreous photograph distributings in surface layer as far as possible little, and between can even distributinging Yu Jing and do not connect, no matter be opposite,this kind distributings oxygen or diffuse to will increase resistance; 3 it is to because diffuse,raise vitreous photograph viscosity the function that speed is viscosity this diffuses those who increase Na+ obstruction.
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