Barium Titanate

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Barium Titanate

• By Andy Selvy
• Cer. 251

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Barium Titanate

• General Info
• Commercial uses
• Phase Diagram

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BaTiO3 Info
BaO TiO2
BaTiO3
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• BaTiO3 Properties
• Perovskite Structure
• Piezoelectricity
• Density 5.85 g/cm3
• High Dielectric constant

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Uses for BaTiO3

• Underwater Sonar
• Guided Missiles
• Acoustic Mines
• Sound Reproduction

• Ultrasonic Therapy
• Electronic Materials
• Ultrasonic Cleaning
• Filters

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Ceramic Capacitors

• Multilayer Ceramic Capacitors (MLCC)

Barium titanate powder, Made into capacitors
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BaTiO3 Phase Diagram
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Lets build up the phase diagram.
Start with the empty diagram
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Lets build up the phase diagram.
BaTiO3
Liquid
Label important phase fields
Ba2TiO4Liq
TiO2 Liq
Ba2TiO4 Hex BaTiO3
BaOBa2TiO4
Cubic BaTiO3 Liq
Ba2TiO4 Cubic BaTiO3
BaTi4O9 TiO2
Cubic BaTiO3BaTi2O5
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Some finishing touches
Eutectic Points
Congruent Melting Pts
Peritectic Points
Some important points
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The End