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U.S. Borax Dehybor® results from the dehydration and fusion of borax. This hard, glassy, granular product is used in glass, ceramic, and enamel frit production to help increase yields and reduce energy consumption.
As a result, Dehybor is a popular choice for use in manufacturing borosilicate and other glasses, glazes, and enamels. It’s also a useful ingredient in cleaning products. And, thanks to its crosslinking abilities, it has found a place in energy production.
Na2B4O7 Sodium Tetraborate Anhydrous Borax
USA
In borosilicate glass manufacturing, Dehybor has advantages over 5- and 10-mol borax:
Dehybor allows the formulation of low-melting glazes and enamels with the correct thermal expansion in glass and enamel production. In enamels, it also improves adhesion to metal by dissolving iron oxide and reducing the melt surface tension.
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Molecular weight: 201.22
Specific gravity: 2.37
Appearance: Free-flowing, colorless, glassy
Stability: Dehybor is a stable, fused borate product that does not change chemically under normal storage conditions. If wetted, it reacts exothermically, forming hydrated sodium borates. When storing the product, avoid exposure to a humid atmosphere, which might cause caking. Also be sure to maintain the integrity of the packaging.
Bulk density: 67 lb/ft3 (1,074 kg/m3)
Angle of repose: 35°
Boric oxide, B2O3: ~69%
Sodium oxide, Na2O: ~31%
Containers: Products may be available in bulk, IBCs, or small bags
This hard, glassy, granular material gradually absorbs water under ambient storage conditions, so care should be taken to prevent exposure to humid air and moisture. In aqueous solution, it can provide a slow release of boron.
Dehybor generally handles well in terms of its flow characteristics, but attention must be given to the abrasive nature of the particles. When handling large quantities or for long-term, continuous operation of the unloading plant, we strongly suggest using mechanical transfer equipment rather than pneumatic systems.
Dehybor anhydrous borax is available in a 12-, or 30-mesh grade. Dehybor 12-Mesh and 30-Mesh meet the No. 12 and No. 30 U.S. sieve specifications (< 0.1 % retained), with a mesh size of 1.7 mm and 0.600 mm, respectively.
The melting point is 742°C (1368°F), and the reaction of Dehybor with water is exothermic.
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