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Glass - Essay

Glass


is a substance whose form is dependent upon a great number of properties. It can be categorized under different types. Soda-lime is theleast expensive of the types for good reason. Lead is used most commonly as an art . Borosilicate has many advantageous properties. Aluminum silicate is not quite so common. Ninety-six percent silica is the result of the removal of almost all of the non-silicate components in silica . Fused silica is the most expensive and the hardest to fabricate.
is an amorphous substance that is a part of our everyday lives. is used in labware, bakeware, automotive headlights, and much more. Along with the many uses of , there ...

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is an intriguing substance in the way that the moment you change the percentage of one of its components, the itself is different. (Education Dep. Properties: Chemical). Often, it can even be classified as a different type of . Commercial es are found in six basic categories, soda-lime , lead , borosilicate , aluminum silicate , ninety-six percent and fused silica .
Soda-lime is the most common and least expensive . Approximately ninety percent of all is soda-lime . Soda-lime contains between sixty and seventy-five percent silica, twelve to eighteen percent soda and five to twelve percent lime. Its resistence to high temperature and sudden changes of temperature are minimal. Also its resistence to corrosive chemicals is only average.(Education Dep. Types of ) However, the typical commercial soda-lime contains seventy-two percent SiO2 , fifteen percent Na2O, five percent CaO, four percent MgO, two percent Al2O3, and one percent B2O3. Certain impurities are found in ...

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way in which lead glass is different from soda-lime glass is that in the case of lead glass, lead oxide(PbO) is used instead of sodium carbonate.(Brady, Holum, 1988) The properties of this glass include a brilliance, which is employed by cutting.(Education Dep. Types of Glass) The typical commercial lead sealing glass, which contains a smaller percentage of lead oxide, is made up of seventy-seven percent SiO2, nine percent Na2O, five percent K2O, eight percent PbO and one percent CaO. This particular type has a softening point of 630 degrees Celsius, higher than that of soda-lime glass. (Grolier). Lead glass, when cut, can actually bend light rays. This characteristic, in addition ...

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PAPER DETAILS
Added: 10/8/2006 10:15:41 AM
Category: Science & Nature
Type: Premium Paper
Words: 1557
Pages: 6

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