Electron micrograph of kaolinite
crystals. X21,000 .
(Photograph courtesy of Georgia
Kaolin Co., Inc.)
Structure and
Properties of Ceramics
Callister Chapter 12
Lecture 1
Instructor Dr. Amir Khesro
,Structures & Properties of Ceramics
ISSUES TO ADDRESS...
• How do the crystal structures of ceramic materials
differ from those for metals?
• How do point defects in ceramics differ from those
defects found in metals?
• How are impurities accommodated in the ceramic lattice?
• Phase diagrams for ceramics?
• How are the mechanical properties of ceramics
measured, and how do they differ from those for metals?
13/03/2019 Dr Amir Khesro AWKUM 2
, Ceramics
• Ceramics are inorganic and nonmetallic
materials.
• The term “ceramic” comes from the Greek word
keramikos, which means “burnt stuff,” indicating
that desirable properties of these materials are
normally achieved through a high-temperature
heat treatment process called firing.
• Most ceramics are compounds between metallic
and nonmetallic elements for which the
interatomic bonds are either totally ionic, or
predominantly ionic but having some covalent
character.
13/03/2019 Dr Amir Khesro AWKUM 3
, Classes of Ceramics
• Traditional Ceramics
– China clay – Bricks
– Porcelain – Glasses
– Kaolinite – Tiles
• Modern Ceramics
– Dielectrics – Thermoelectrics
– Piezoelectrics – Ferrites
– Ferroelectrics – Ion Conductors
13/03/2019 Dr Amir Khesro AWKUM 4
crystals. X21,000 .
(Photograph courtesy of Georgia
Kaolin Co., Inc.)
Structure and
Properties of Ceramics
Callister Chapter 12
Lecture 1
Instructor Dr. Amir Khesro
,Structures & Properties of Ceramics
ISSUES TO ADDRESS...
• How do the crystal structures of ceramic materials
differ from those for metals?
• How do point defects in ceramics differ from those
defects found in metals?
• How are impurities accommodated in the ceramic lattice?
• Phase diagrams for ceramics?
• How are the mechanical properties of ceramics
measured, and how do they differ from those for metals?
13/03/2019 Dr Amir Khesro AWKUM 2
, Ceramics
• Ceramics are inorganic and nonmetallic
materials.
• The term “ceramic” comes from the Greek word
keramikos, which means “burnt stuff,” indicating
that desirable properties of these materials are
normally achieved through a high-temperature
heat treatment process called firing.
• Most ceramics are compounds between metallic
and nonmetallic elements for which the
interatomic bonds are either totally ionic, or
predominantly ionic but having some covalent
character.
13/03/2019 Dr Amir Khesro AWKUM 3
, Classes of Ceramics
• Traditional Ceramics
– China clay – Bricks
– Porcelain – Glasses
– Kaolinite – Tiles
• Modern Ceramics
– Dielectrics – Thermoelectrics
– Piezoelectrics – Ferrites
– Ferroelectrics – Ion Conductors
13/03/2019 Dr Amir Khesro AWKUM 4
