Glass - Revision history

Farred: addition

2013-08-27T18:28:01Z

addition

Farred: /* Natural Glass */

2011-12-21T17:18:00Z

Natural Glass

Farred: /* Artificial Glass */ fix typo

2011-12-21T16:59:19Z

Artificial Glass: fix typo

Strangelv: stub sorting

2007-06-10T17:36:35Z

stub sorting

Jarogers2001 at 04:41, 6 April 2007

2007-04-06T04:41:44Z

Cfrjlr: links + info

2007-03-18T16:38:26Z

links + info

Strangelv: Category:ISRU

2007-02-04T01:35:39Z

Category:ISRU

Strangelv: added Materials category

2007-02-03T19:54:17Z

added Materials category

Geoffrey.landis: more on glass fibers

2007-01-16T15:44:09Z

Geoffrey.landis: placeholder stub

2007-01-16T15:24:51Z

placeholder stub

New page

While the word '''Glass''' is sometimes used to refer to any amorphous solid, the word is most specifically used to refer to a family of amorphous solids typically using tetravalent silica as the network-forming connection. Glass is a strong, but brittle, material.

Transparent forms of glass are the most commonly used, however, not all glass is transparent. Glasses may be colored by any number of different impurities. [[Iron]] ions are the most common form of impurity that produces dark glass; glass containing iron will be yellow, brown, or black depending on the iron content. (For example, obsidian, a naturally-formed volcanic glass, is a shiny opaque black; the color is from the iron content). Other transition metals can give glass bright colors.

[[Silicon | Silica]] or silicate is the primary constituent of glass. While a form of glass can be made from pure silica, the very high melting temperature of silica makes high-silica glass difficult to work with, and almost all commonly used glass contains other oxides. On Earth, sodium oxide is usually added to form low-cost ''soda-lime glass'' (commonly called ''window glass''); boron oxides may then added to form the higher-cost ''borosilicate glass'', which has a lower coefficient of thermal expansion and hence may be used in applications involving heating and cooling. Many other specialized glass formulations exist.

[[Category:Chemistry]]
{{Stub}}

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 Transparent forms of glass are the most commonly used, however, not all glass is transparent. Glasses may be colored by any number of different impurities. [[Iron]] ions are the most common form of impurity that produces dark glass; glass containing iron will be yellow, brown, or black depending on the iron content. (For example, obsidian, a naturally-formed volcanic glass, is a shiny opaque black; the color is from the iron content). Other transition metals can give glass bright colors.
-[[Silicon | Silica]] or [[silicate]] is the primary constituent of glass, which is abundant on the [[Moon]]. While a form of glass can be made from pure [[silica]], the very high melting temperature of silica makes high-silica glass difficult to work with, and almost all commonly used glass contains other oxides. On Earth, [[sodium oxide]] is usually added to form low-cost ''soda-lime glass'' (commonly called ''window glass''); [[boron oxides]] may then added to form the higher-cost ''borosilicate glass'', which has a lower coefficient of [[thermal expansion]] and hence may be used in applications involving heating and cooling. Many other specialized glass formulations exist.
+[[Silicon | Silica]] or [[silicate]] is the primary constituent of glass, which is abundant on the [[Moon]]. While a form of glass can be made from pure [[silica]], the very high melting temperature of silica makes high-silica glass difficult to work with, and almost all commonly used glass contains other oxides. On Earth, [[sodium oxide]] is usually added to form low-cost ''soda-lime glass'' (commonly called ''window glass''); boron oxides may then added to form the higher-cost ''borosilicate glass'', which has a lower coefficient of [[thermal expansion]] and hence may be used in applications involving heating and cooling. Many other specialized glass formulations exist.  The scarcity of water on the moon makes anhydrous glass practical.  This type is considerably stronger than typical glass on Earth which is exposed to moisture.
-Glass by itself is not commonly used as a structural material because it is [[brittle]]. One solution to this problem is to use glass ''fiber'' in a ''glass composite'' material. One form of glass fiber is called ''fiberglass''. A composite material requires a ''matrix'' to hold the fibers together. In terrestrial glass-fiber applications, this matrix is usually an [[organic]] material, typically [[epoxy]] or [[polyester]] [[resin]]; the resulting structural material is sometimes called ''fiber-reinforced polymer'' (FRP) or ''glass-reinforced plastic'' (GRP). ''Metal-matrix'' composites and even glass-matrix composites, do exist, but are little used on Earth.
+===Fiberglass===
 One area of interesting research might be to investigate whether [[silicon]] based resins can be synthesized as an alternative to [[organic]] or [[carbon]]-based resins.
 Glass fibers are also used to transmit light in the form of light-pipes and fiber-optics.
 {{Eng Stub}}

@@ Line 1: / Line 1: @@
 ==Natural Glass==
 {{expandsec}}
 ==Artificial Glass==
 While the word '''Glass''' is sometimes used to refer to any amorphous [[solid]], the word is most specifically used to refer to a family of amorphous solids typically using tetravalent silica as the network-forming connection. Glass is a strong, but brittle, material.

@@ Line 8: / Line 8: @@
 [[Silicon | Silica]] or [[silicate]] is the primary constituent of glass, which is abundant on the [[Moon]]. While a form of glass can be made from pure [[silica]], the very high melting temperature of silica makes high-silica glass difficult to work with, and almost all commonly used glass contains other oxides. On Earth, [[sodium oxide]] is usually added to form low-cost ''soda-lime glass'' (commonly called ''window glass''); [[boron oxides]] may then added to form the higher-cost ''borosilicate glass'', which has a lower coefficient of [[thermal expansion]] and hence may be used in applications involving heating and cooling. Many other specialized glass formulations exist.
-Glass by itself is not commonly used as a structural material because it is [[brittle]]. One solution to this problem is to use glass ''fiber'' in a ''glass composite'' material. One form of glass fiber is called ''fiberglass''. A composite material require a ''matrix'' to hold the fibers together. In terrestrial glass-fiber applications, this matrix is usually an [[organic]] material, typically [[epoxy]] or [[polyester]] [[resin]]; the resulting structural material is sometimes called ''fiber-reinforced polymer'' (FRP) or ''glass-reinforced plastic'' (GRP). ''Metal-matrix'' composites and even glass-matrix composites, do exist, but are little used on Earth.
+Glass by itself is not commonly used as a structural material because it is [[brittle]]. One solution to this problem is to use glass ''fiber'' in a ''glass composite'' material. One form of glass fiber is called ''fiberglass''. A composite material requires a ''matrix'' to hold the fibers together. In terrestrial glass-fiber applications, this matrix is usually an [[organic]] material, typically [[epoxy]] or [[polyester]] [[resin]]; the resulting structural material is sometimes called ''fiber-reinforced polymer'' (FRP) or ''glass-reinforced plastic'' (GRP). ''Metal-matrix'' composites and even glass-matrix composites, do exist, but are little used on Earth.
 One area of interesting research might be to investigate whether [[silicon]] based resins can be synthesized as an alternative to [[organic]] or [[carbon]]-based resins.

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-{{Stub}}
+{{Eng Stub}}
 [[Category:Chemistry]]
 [[Category:Materials]]
 [[Category:ISRU]]

← Older revision		Revision as of 04:41, 6 April 2007
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		+	==Natural Glass==
		+	{{expandsec}}
		+	==Artificial Glass==
	While the word '''Glass''' is sometimes used to refer to any amorphous [[solid]], the word is most specifically used to refer to a family of amorphous solids typically using tetravalent silica as the network-forming connection. Glass is a strong, but brittle, material.		While the word '''Glass''' is sometimes used to refer to any amorphous [[solid]], the word is most specifically used to refer to a family of amorphous solids typically using tetravalent silica as the network-forming connection. Glass is a strong, but brittle, material.

← Older revision		Revision as of 01:35, 4 February 2007
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	[[Category:Chemistry]]		[[Category:Chemistry]]
	[[Category:Materials]]		[[Category:Materials]]
		+	[[Category:ISRU]]