Difference between revisions of "Boric oxide"
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== Description == | == Description == | ||
| − | A colorless crystalline compound used in metallurgy and in the manufacture of heat-resistant ([http://cameo.mfa.org/materials/fullrecord.asp?name=borosilicate | + | A colorless crystalline compound used in metallurgy and in the manufacture of heat-resistant ([http://cameo.mfa.org/materials/fullrecord.asp?name=borosilicate%20glass borosilicate]) glassware. Boric oxide is obtained from [http://cameo.mfa.org/materials/fullrecord.asp?name=boric%20acid boric acid], [http://cameo.mfa.org/materials/fullrecord.asp?name=borax borax], [http://cameo.mfa.org/materials/fullrecord.asp?name=sodium%20borate sodium borate], or [http://cameo.mfa.org/materials/fullrecord.asp?name=colemanite colemanite]. It is used in combination with silica as a flux for glazes. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
| Line 42: | Line 42: | ||
== Authority == | == Authority == | ||
| − | * | + | * Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993 |
| − | * | + | * Henry Hodges, ''Artifacts: An Introduction to Early Materials and Technology'', Ronald P. Frye, Kingston, Canada, 1988 |
| − | * | + | * Random House, ''Webster's Encyclopedic Unabridged Dictionary of the English Language'', Grammercy Book, New York, 1997 |
[[Category:Materials database]] | [[Category:Materials database]] | ||
Revision as of 07:27, 24 July 2013
Description
A colorless crystalline compound used in metallurgy and in the manufacture of heat-resistant (borosilicate) glassware. Boric oxide is obtained from boric acid, borax, sodium borate, or colemanite. It is used in combination with silica as a flux for glazes.
Synonyms and Related Terms
boron oxide; boric anhydride; boron trioxide; boron sesquioxide
Other Properties
Soluble in ethanol, hot water.
| Composition | B2O3 |
|---|---|
| CAS | 1303-86-2 |
| Melting Point | 450 |
| Density | 2.46 |
| Molecular Weight | mol. wt. = 69.6 |
| Boiling Point | 1500 |
Hazards and Safety
Noncombustible.
LINK: International Chemical Safety Card
Authority
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- Henry Hodges, Artifacts: An Introduction to Early Materials and Technology, Ronald P. Frye, Kingston, Canada, 1988
- Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997