Anhydrous Borax
Fused Borax, Sodium Tetraborate
Formula: Na2B4O7
| DENS - Density (Specific Gravity) |
2.36 |
| MLPT - Melting Point (MP) |
742C |
A highly concentrated source of boric oxide for glazes. Anhydrous borax is made by burning or fusing hydrated borax. It thus contains little or no water of crystallization (conversation ratio of .53 compared to hydrated decahydrate borax) and does not rehydrate under normal storage conditions. Anhydrous borax is water soluble, but considerably less so than raw borax (in aqueous solution it can provide slow release of boron).
This material does not puff or swell during melting (minimizing loss of powder in kilns with strong drafts), and melts easier (the swelling in other forms can create a porous state with an insulation factor that slows melting). Anhydrous borax is an excellent glass former, it does not puff or swell during melting thus fewer production problems result.
This material is used as a source of B2O3 in the manufacture of many different types of borosilicate glass, including heat and chemical resistant glasses, illumination glasses, optical lenses, medical and cosmetic containers, hollow microspheres and glass beads. It has a higher bulk density and melts more rapidly than raw forms of borax. It also provides a source of sodium.
Out Bound Links
- (URLs)
Dehybor Data Sheet
http://www.borax.com/pdfs/dist/Profile_Dehybor_Anh... - (Materials - Related)
Boric Acid - H3BO3 or B2O3.3H2O
Boracic acid, Orthoboric Acid, Hydrous Boric Oxide
- (Hazards - General)
Boron Compounds and Their Toxicity
Many natural mineral and man-made material sources... - (Typecodes)
1: GNM - Generic Material
- (Typecodes)
1: FLS - Flux Source
- (MDT - Member)
Glass Industry
The materials included in this MDT were selected i... - (MDT - Member)
Crystal Glazes
These materials are specially defined for makers o... - (MDT - Member)
UK
We are working on this database and would apprecia... - (MDT - Member)
Ron Roy
This is the traditional Ron Roy materials file. He... - (Minerals - Parent mineral)
Borate Minerals
The major borate minerals are Colemanite and Ulexi... - (MDT - Member)
North America
The decision about what materials to include in th... - (MDT - Member)
New Zealand
We are working on this database and would apprecia... - (MDT - Member)
Latin and South America
Latin America and South America. We are working on... - (MDT - Member)
Europe
Countries of Eastern Europe and former Soviet Unio... - (MDT - Member)
Australia
We are working on this database and would apprecia... - (MDT - Member)
Asia
All of Asia including Turkey, Russia, Indosnesia, ... - (MDT - Member)
Africa
All of continental Africa. We are working on this ...
In Bound Links
- (Materials - Related)
Borax Pentahydrate - Na2B4O7.5H2O - Etibor-48
Borax 5 Mol, Sodium Tetraborate, Borax 5-hydrate
- (Materials - Related)
Borax Decahydrate - Na2B4O7.10H2O
Sodium TetraBorate Decahydrate, Borax 10-hydrate, 10 Mol Borax, Neobor
- (Materials - Related)
Boric Oxide - B2O3
Anhydrous Boric Acid, B2O3
- (Materials - Related)
Disodium Octaborate Tetrahydrate - Na2B8O13.4H2O
Na2B8O13.4H2O, Polybor
XML for Import into INSIGHT
<?xml version="1.0" encoding="UTF-8"?>
<material name="Anhydrous Borax" descrip="Fused Borax, Sodium Tetraborate" searchkey="Calcined Borax, Dehydrated Borax, Pyrobor" loi="0.00" casnumber="63989-70-8">
<oxides>
<oxide symbol="Na2O" name="Sodium Oxide, Soda" status="U" percent="30.820" tolerance=""/>
<oxide symbol="B2O3" name="Boric Oxide" status="" percent="69.190" tolerance=""/>
</oxides>
</material> | 
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