|Monthly Tech-Tip |
Alternate Names: Borax 5 Mol, Sodium Tetraborate, Borax 5-hydrate
Consists of white crystalline granules or powder. It is mildly alkaline in solution. The advantages of this material vs. the decahydrate form lie in the lower transportation, handling and storage costs of a more concentrated product. 74.6 lb. of this material are equivalent to 100 lb. of decahydrate.
It is stable under ordinary conditions, free-flowing, and easily handled by air or mechanical conveying.
Borax pentahydrate is currently produced at Bandirma Borax Plant in Turkey and at Rio Tinto in California.
Borax Pentahydrate Data Sheet
Neobor Data Sheet
|Oxides||B2O3 - Boric Oxide|
Boron Compounds and Their Toxicity
Generic materials are those with no brand name. Normally they are theoretical, the chemistry portrays what a specimen would be if it had no contamination. Generic materials are helpful in educational situations where students need to study material theory (later they graduate to dealing with real world materials). They are also helpful where the chemistry of an actual material is not known. Often the accuracy of calculations is sufficient using generic materials.
Materials that source Na2O, K2O, Li2O, CaO, MgO and other fluxes but are not feldspars or frits. Remember that materials can be flux sources but also perform many other roles. For example, talc is a flux in high temperature glazes, but a matting agent in low temperatures ones. It can also be a flux, a filler and an expansion increaser in bodies.
Borate glazes, those fluxed with the oxide B2O3, are the most common type used in ceramic industry and hobby for low and medium temperatures.