Manufacturer and Supplier of Barium Titanate
BARIUM TITANATE E2 Grade
Product Chemistry
The reaction between the oxides of Group II elements and Titanium Dioxide forms a series of titanate phases of general formula M x TiyOx+2y . These compounds are of technical interest because of their ferroelectric properties resulting from the large difference in size between for example the Ba2+ ion (1.43 A) and the Ti 4+ ion (0.60A). This allows the Ti 4+ ion a high degree of mobility in the octahedral lattice. Application of an electric field to the crystal causes polarisation as the titanium Ti4+ ions are drawn over to one side of the octahedron. The tetragonal crystalline form also has a very high dielectric constant which varies with temperature. These phenomena make Titanate compounds especially important for the manufacture of ceramic capacitors in which BaTi03 is usually the major component.
Typical Analysis
E.2 Grade (a high purity, fine particle size powder with excess Titania stoichiometry)
|
Barium Oxide
|
BaO
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64.50
|
|
Titanium Dioxide
|
TiO2
|
34.50
|
|
Alumina
|
Al2O3
|
0.05
|
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Silica
|
SiO2
|
0.05
|
|
Strontia
|
SrO
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0.20
|
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Calcium Oxide
|
CaO
|
0.05
|
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Magnesia
|
MgO
|
0.05
|
|
Sodium Oxide
|
Na2O
|
0.05
|
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(BaO+SrO : TiO2 mol.ratio = 0.98)
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Percentage by weight
Physical Properties
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Specific Gravity
|
6.01
|
|
Melting Point
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1705°C
|
|
Loss on ignition
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<0.5%(1 hr at 1000°C)
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Particle Size Distribution
95% less than 5.0 microns 50% less than 1.7 microns (Malvern Mastersizer 2000)
Handling and Safety
A safety data sheet is available on request.
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Product Code: BATI03-2
