Disadvantages of barium strontium titanate and its application
time：2020-11-30
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Barium strontium titanate is obtained by barium titanate (BaTiO3) and Strontium titanate (SrTiO3) high-temperature solid reaction, is an infinite solid solution of BaTiO3 and SrTiO3. BaTiO3 crystal is in a highly polarized state with a high dielectric constant under the interaction of ion displacement polarization and electron displacement polarization. However, BaTiO3 has a significant temperature dependence. SrTiO3 as a new multifunctional ceramic material, compared with BaTiO3 has better temperature stability, lower dielectric loss (10-3-10-4), but to BaTiO3 dielectric constant (225-250) (103-104) 2 х differ a lot.
In order to overcome the respective shortcomings of the two materials, Sr is usually used to partially replace Ba to form baxSR1-XTIO3 system material, and the capacitor ceramic material satisfying the performance requirements can be obtained by adjusting the X value. Barium strontium titanate (BaxSR1-XTiO3) has a similar structure and is also a typical perovskite phase structure, except that Sr2+ partially replaces Ba2+. The larger Ba2+ and Sr2+ occupy the position of the top Angle, the smaller Ti4+ occupy the position of the body center, and the six face centers are occupied by O2-. These oxygen ions form an oxygen octahedron, with Ti4+ at its center. The whole crystal can be regarded as being connected by conjunctions of oxygen octahedron, and the space between each oxygen octahedron is occupied by Ba2+/Sr2+, so the coordination Numbers of Ba2+/Sr2+ and Ti4+ are 12 and 6, respectively.
Magnesium titanate (Magnesium titanate --Mg2TiO4 Magnesium titanate --MgTiO3) is a basic inorganic dielectric material with excellent dielectric properties, frequency properties and mechanical properties. It is widely used in the performance improvement fields of ceramic capacitors, microwave antennas, filters and ceramic substrates.
Strontium titanate is an excellent dielectric properties, thermal properties, optical properties and static characteristics based on inorganic dielectric material, widely used in electronic ceramic material, has the function of high dielectric constant, low dielectric loss, heat stability, etc., are widely used in electronics, machinery, ceramic industry, ceramic capacitors, PTC thermistor, varistor, optical glass and carbon powder to improve the performance of place.
In order to overcome the respective shortcomings of the two materials, Sr is usually used to partially replace Ba to form baxSR1-XTIO3 system material, and the capacitor ceramic material satisfying the performance requirements can be obtained by adjusting the X value. Barium strontium titanate (BaxSR1-XTiO3) has a similar structure and is also a typical perovskite phase structure, except that Sr2+ partially replaces Ba2+. The larger Ba2+ and Sr2+ occupy the position of the top Angle, the smaller Ti4+ occupy the position of the body center, and the six face centers are occupied by O2-. These oxygen ions form an oxygen octahedron, with Ti4+ at its center. The whole crystal can be regarded as being connected by conjunctions of oxygen octahedron, and the space between each oxygen octahedron is occupied by Ba2+/Sr2+, so the coordination Numbers of Ba2+/Sr2+ and Ti4+ are 12 and 6, respectively.
Magnesium titanate (Magnesium titanate --Mg2TiO4 Magnesium titanate --MgTiO3) is a basic inorganic dielectric material with excellent dielectric properties, frequency properties and mechanical properties. It is widely used in the performance improvement fields of ceramic capacitors, microwave antennas, filters and ceramic substrates.
Strontium titanate is an excellent dielectric properties, thermal properties, optical properties and static characteristics based on inorganic dielectric material, widely used in electronic ceramic material, has the function of high dielectric constant, low dielectric loss, heat stability, etc., are widely used in electronics, machinery, ceramic industry, ceramic capacitors, PTC thermistor, varistor, optical glass and carbon powder to improve the performance of place.
