CH1012
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CERAMICS I
Ceramics are inorganic,
non-metallic, solid materials.
non-metallic, solid materials.
• Hard, brittle and stable to very
high temperatures & chemicals.
high temperatures & chemicals.
• Structures may be Amorphous
eg. brick clay ceramics or Crystalline eg. BN
eg. brick clay ceramics or Crystalline eg. BN
The crystalline forms may be Ionic
eg. YBa2Cu3O7 or Network solids eg. BN.
eg. YBa2Cu3O7 or Network solids eg. BN.
• Clay ceramics are the oldest form and are
composed of a glassy cementing medium
containing aluminosilicate microcrystals.
Si2Al2O5(OH)4(s) ® Si2Al2O7(s) + 2H2O(g)
kaolinite clay 1000OC aluminosilicate
composed of a glassy cementing medium
containing aluminosilicate microcrystals.
Si2Al2O5(OH)4(s) ® Si2Al2O7(s) + 2H2O(g)
kaolinite clay 1000OC aluminosilicate
