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Boric Oxide

Formula: B2O3
Alternate Names: Anhydrous Boric Acid, B2O3

Oxide Weight69.60
Formula Weight69.60
If this formula is not unified correctly please contact us.
DENS - Density (Specific Gravity) 1.5-1.75
DTMP - Decomposition Temperature 185C
GSPT - Frit Softening Point 577C

A hard glassy material, granular in texture. Exposed to the atmosphere it slowly absorbs water, reverting to boric acid. It is soluble in water but at a much slower rate than boric acid. Approximately 56.3 kg of boric oxide are the chemical equivalent of 100 kg of boric acid. Boric oxide is used where B2O3 is required without the presence of sodium or calcium and/or where water would be detrimental to the process.

Specialty ceramics: Boric oxide is used to produce various types of high strength and heat-resistant ceramic products such as boron carbide, boron nitride, titanium and zirconium diborides, as well as elemental boron.

Refractories: It is used in the manufacture of chemically bonded firebricks and castables which require resistance to high temperature, abrasion and corrosion. Boric oxide is used as a binder for magnesia-based refractory bricks and as a stabilizer for dolomite refractory bricks commonly used in steel smelting furnaces.

Glazes, frits and enamels: Suppliers speak of boric oxide as increasing strength, scratch resistance, and chemical resistance of ceramic wares such as wall and floor tiles, tableware and porcelain and of enameled appliances, however they do not say compared to what.

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By Tony Hansen

XML for Import into INSIGHT

<?xml version="1.0" encoding="UTF-8"?> <material name="Boric Oxide" descrip="" searchkey="Anhydrous Boric Acid, B2O3" loi="0.00" casnumber="1303-86-2"> <oxides> <oxide symbol="B2O3" name="Boric Oxide" status="" percent="100.000" tolerance=""/> </oxides> </material>

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