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High-dielectric constant voltage-resistant rare earth-doped strontium titanate ceramic and preparation method thereof

A rare earth doping, strontium titanate technology, applied in the field of strontium titanate ceramics and its preparation, can solve the problem that the energy storage density of strontium titanate-based ceramics cannot be effectively improved, the relative dielectric constant cannot be significantly improved, and the limit of titanate The use range of strontium-based ceramics and other issues can promote the promotion and application, the preparation process is easy to control, and the energy storage density and comprehensive performance can be improved.

Inactive Publication Date: 2012-06-27
JINGDEZHEN CERAMIC UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, since the relative permittivity and withstand voltage strength of dielectric materials are a pair of relatively contradictory parameters, the research on strontium titanate-based ceramic energy storage materials has not made breakthrough progress. At the same time as the electrical constant, the withstand voltage strength is significantly reduced; and in the case of ensuring the withstand voltage strength, the relative permittivity cannot be significantly improved
Therefore, it is difficult to effectively increase the energy storage density of strontium titanate-based ceramics in the prior art, and its comprehensive performance has also been greatly affected, thereby limiting the scope of use of strontium titanate-based ceramics, and its promotion and application have also been hindered

Method used

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  • High-dielectric constant voltage-resistant rare earth-doped strontium titanate ceramic and preparation method thereof
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  • High-dielectric constant voltage-resistant rare earth-doped strontium titanate ceramic and preparation method thereof

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Embodiment Construction

[0021] In the embodiment of the present invention, the high-dielectric withstand voltage rare earth doped strontium titanate ceramics has a general chemical formula of Nd x Sr 1-1.5x TiO 3 , using analytically pure SrCO 3 、Nd 2 o 3 and TiO 2 Preparation of starting materials. The formula parameters in the general chemical formula of each embodiment and the raw material consumption in the preparation process are shown in Table 1.

[0022] Table 1 The formulation parameters and raw material consumption of Examples 1-6 rare earth-doped strontium titanate ceramics

[0023]

[0024] Based on the above formula design, the preparation method of the high-dielectric withstand voltage rare earth doped strontium titanate ceramics in the embodiment of the present invention is as follows:

[0025] (1) SrCO 3 、Nd 2 o 3 and TiO 2 According to the consumption shown in Table 1, the ingredients are weighed as raw materials;

[0026] (2) According to the mass ratio of raw material...

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Abstract

The invention discloses high-dielectric constant voltage-resistant rare earth-doped strontium titanate ceramic. The high-dielectric constant voltage-resistant rare earth-doped strontium titanate ceramic has a general chemical formula of NdxSr1-1.5xTiO3, wherein x represents the mole number of Nd and is greater than 0 and less than or equal to 0.2. The invention also discloses a preparation method of the high-dielectric constant voltage-resistant rare earth-doped strontium titanate ceramic. The preparation method obviously improves a relative dielectric constant of a strontium titanate ceramic product, guarantees and improves dielectric strength of the strontium titanate ceramic product, realizes the technical breakthrough of a strontium titanate ceramic system material, effectively improves energy storage density and comprehensive performances of the strontium titanate ceramic product, develops an application range of the strontium titanate ceramic system material as a high-voltage energy-storage dielectric material, and greatly improves popularization and application of the strontium titanate ceramic system material.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a strontium titanate ceramic and a preparation method thereof. Background technique [0002] Strontium titanate (SrTiO 3 ) ceramics is an important functional material, widely used in electronics, machinery industry and other fields. At room temperature, strontium titanate ceramics have a cubic phase structure and are paraelectric, with a high relative permittivity (ε r ~300), and because it is not like ferroelectric ceramics (such as BaTiO 3 ) such that there is instability of the domain wall inside, so strontium titanate ceramics also have a high withstand voltage strength (E when the sample thickness is 1.0±0.05mm b ~10kV / mm), thus having high ε r and E b unique properties. For this reason, in recent years, strontium titanate-based ceramics are considered to be one of the solid-state energy storage medium material systems with great development potential. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/47C04B35/622
Inventor 沈宗洋骆雯琴李月明王竹梅
Owner JINGDEZHEN CERAMIC UNIV
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