ceramic ??? 1

[vnistra800]

hi friends:

can any one help me and give me any article or link to clarify what is ceramic??

i will appressiate to any one help me

best regrds

 

[tomwalz]

I have never been able to find “the” definition. I have send definitions as loose as calling ceramics the third class of material after metals and organics. I have also seen ceramics defined as everything not otherwise classified.

Thomas J. Walz
Carbide Processors, Inc.

http://www.carbideprocessors.com

 

[Eltron]

The American Society for Testing and Materials (ASTM) defines a ceramic article as “an article having a glazed or unglazed body of crystalline or partly crystalline structure, or of glass, which body is produced from essentially inorganic, nonmetallic substances and either is formed from a molten mass which solidifies on cooling, or is formed and simultaneously or subsequently matured by the action of the heat.”

 

[swall]

According to Van Vlack, "Ceramic materials contain phases which are compounds of metallic and nonmetallic elements". To which I would add, "most commonly joined by ionic bonding".

 

[rd400guy]

http://en.wikipedia.org/wiki/Ceramic

I particularly like "Technical ceramics can also be classified into three distinct material categories:

Oxides: Alumina, zirconia
Non-oxides: Carbides, borides, nitrides, silicides
Composites: Particulate reinforced, combinations of oxides and non-oxides."

Askeland: "Ceramic materials are complex chemical compounds and solutions containing both metallic and nonmetallic elements."

 

[vnistra800]

dear friends:

thank u very much for every one help me .
now how can i distinguish ceramic from other materials???

thank in advanse for everyone.

best regrds

 

[vnistra800]

hi friends:

how can distinguish between ceramic and other materials ?
is there chemical test??

thanks in advanse

 

[houseman]

Maybe is not a fine definition but ceramic covers covers such compounds made from cristaline structures, with ionic and/or covalent bonding. Some of them are intermetallic and others pure ceramics. Depending of chemical bonding physical/chemical characteristics are obatined (hardens, toughness, electrical/heating conductiveness,...)
Nothing to do with metals also with cristaline structure but electrons are not localised.
Sometimes you can find glasses as ceramics, but it is not correct, although chemicaly are similar, they have vitreous structures.
Combinations are composites trying to obtain best mix of characteristics.
If you have a concrete case?
Regards,