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Sodium Silicate, 50 Kg
Price :
৳550
Size :
- 1 KG
- 50 KG
Estimated Shipping Time: Deliveries take up to 2-3 days after you place your order.
Product SKU: 06T15285xBg
- Product Type: Sodium Silicate
- Formula: Na2SiO3
- Size: 50 kg drum
The largest application of sodium silicate solutions is a cement for producing cardboard.[1] When used as a paper cement, the tendency is for the sodium silicate joint eventually to crack within a few years, at which point it no longer holds the paper surfaces cemented together.
Sodium silicate solutions can also be used as a spin-on adhesive layer to bond glass to glass [21] or silicon oxide covered silicon wafers to one another.[22] Sodium silicate glass-to-glass bonding has the advantage that it is a low temperature bonding technique, as opposed to fusion bonding.[21] It is also less processing intensive than glass-to-glass anodic bonding,[23] which requires an intermediate layer such as SiN to act as a diffusion barrier for sodium ions.[23] Deposition of such a layer requires a low pressure chemical vapor deposition step.[23] A disadvantage of sodium silicate bonding, however, is that it is very difficult to eliminate air bubbles.[22] This is due in part because this bonding technique doesn't require bonding in vacuum and it also doesn't use field assistance like in anodic bonding.[24] Though this lack of field assistance can sometimes be beneficial, because field assistance can provide such high attraction between wafers as to bend a thinner wafer and collapse[24] onto the nanofluidic cavity or MEMS elements.
Refractory use
Water glass is a useful binder of solids, such as vermiculite and perlite. When blended with the aforementioned lightweight aggregates, water glass can be used to make hard, high-temperature insulation boards used for refractories, passive fire protection and high temperature insulations, such as moulded pipe insulation applications. When mixed with finely divided mineral powders, such as vermiculite dust (which is common scrap from the exfoliation process), one can produce high temperature adhesives. The intumescence disappears in the presence of finely divided mineral dust, whereby the waterglass becomes a mere matrix. Waterglass is inexpensive and abundantly available, which makes its use popular in many refractory applications.
Sand casting
It is used as a binder of the sand when doing sand casting of iron or steel. It allows the rapid production of a strong mold, by passing CO2 through the mixture of sand and sodium silicate in the mold box, which hardens it almost instantly.
Dye auxiliary
Sodium silicate solution is used as a fixative for hand dyeing with reactive dyes that require a high pH to react with the textile fiber. After the dye is applied to a cellulose-based fabric, such as cotton or rayon, or onto silk, it is allowed to dry, after which the sodium silicate is painted on to the dyed fabric, covered with plastic to retain moisture, and left to react for an hour at room temperature.[27]
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