Difference between revisions of "sodium silicate"
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| + | == glossary == | ||
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| + | ; OPC: Ordinary Portland cement | ||
== concentrations of sodium silicate to water for various applications == | == concentrations of sodium silicate to water for various applications == | ||
Na<sub>2</sub>SiO<sub>3</sub> | Na<sub>2</sub>SiO<sub>3</sub> | ||
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sodium silicate pentahydrate, Na<sub>2</sub>SiO<sub>3</sub>·5H<sub>2</sub>O, is the common commercial variant most often seen. | sodium silicate pentahydrate, Na<sub>2</sub>SiO<sub>3</sub>·5H<sub>2</sub>O, is the common commercial variant most often seen. | ||
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Dry sodium silicate does not readily dissolve in water. Heating the water to nearly boiling will allow the sodium silicate to dissolve. | Dry sodium silicate does not readily dissolve in water. Heating the water to nearly boiling will allow the sodium silicate to dissolve. | ||
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| + | == refractory cement == | ||
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| + | ''Potassium silicate and Calcium silicate may also be used instead of sodium silicate.'' | ||
| + | A higher silicate:alkali ratio gives faster setting time, while lower ratios give greater strength in the finished product. | ||
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| + | An aqueous solution of sodium silicate and vermiculite or perlite can be combined to form a cement or casting material that will withstand the temperatures of a kiln. The sodium silicate forms a fireproof cement; however, it needs a curing or setting agent to harden the sodium silicate. | ||
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| + | ;Gas:Carbon dioxide | ||
| + | ;Liquid: Glycerol Diacetate plus either Glycerol Triacetate or Ethylene Glycol Diacetate | ||
| + | ;Solids: Calcium silicates (Portland cement), Calcium Sulphate (gypsum), Silicides such as Ferrosilicon or Calcium Silicide, Silicofluorides or fluorosilicates, heavy metal salts such as carbonates or phosphates. | ||
== Sources == | == Sources == | ||
Common '''TSP substitute''' is often Sodium Metasilicate. This is available in any hardware store. | Common '''TSP substitute''' is often Sodium Metasilicate. This is available in any hardware store. | ||
Revision as of 02:30, 12 November 2014
sodium silicate, sodium metasilicate, water glass, liquid glass, Na2SiO35H2O, or, more correctly, Na2SiO2(OH)2·4H2O
Contents
glossary
- OPC
- Ordinary Portland cement
concentrations of sodium silicate to water for various applications
Na2SiO3
sodium silicate pentahydrate, Na2SiO3·5H2O, is the common commercial variant most often seen. Note that the dried prills without packing are nearly the same density as water, so it's a good rough approximation to measure by volume.
- chemical gardens
- 3:2 (by weight sodium silicate:water)
- refractory cement
- 1:1 by weight
- casting
- 1:1 by weight
- cement floor sealer
- 1:4 by weight
Dry sodium silicate does not readily dissolve in water. Heating the water to nearly boiling will allow the sodium silicate to dissolve.
refractory cement
Potassium silicate and Calcium silicate may also be used instead of sodium silicate. A higher silicate:alkali ratio gives faster setting time, while lower ratios give greater strength in the finished product.
An aqueous solution of sodium silicate and vermiculite or perlite can be combined to form a cement or casting material that will withstand the temperatures of a kiln. The sodium silicate forms a fireproof cement; however, it needs a curing or setting agent to harden the sodium silicate.
- Gas
- Carbon dioxide
- Liquid
- Glycerol Diacetate plus either Glycerol Triacetate or Ethylene Glycol Diacetate
- Solids
- Calcium silicates (Portland cement), Calcium Sulphate (gypsum), Silicides such as Ferrosilicon or Calcium Silicide, Silicofluorides or fluorosilicates, heavy metal salts such as carbonates or phosphates.
Sources
Common TSP substitute is often Sodium Metasilicate. This is available in any hardware store.
