Low temperature co-fired ceramic material with high dielectric constant and preparation method thereof

A technology of low-temperature co-fired ceramics and high dielectric constant, applied in the field of ceramic materials, can solve the problems of low dielectric constant, incapable of heterogeneous co-firing of ferrite materials, difficult design, etc., to achieve good dielectric temperature characteristics, low dielectric constant loss, effect of good insulation characteristics

Active Publication Date: 2012-07-18
SHENZHEN SUNLORD ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The dielectric constant of the existing low-temperature cofired ceramics (abbreviated as LTCC) is generally low, basically lower than 100, and it is difficult to design and manufacture embedded ultra-large capacitors, with ultra-low cut-off frequency EMI filter
[0003] In addition, the existing commercialized low-temperature co-fired ceramic materials cannot be heterogeneously co-fired with ferrite materials, and cannot form a dielectric and magnetic composite structure, which is not conducive to the development of new composite devices

Method used

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  • Low temperature co-fired ceramic material with high dielectric constant and preparation method thereof
  • Low temperature co-fired ceramic material with high dielectric constant and preparation method thereof
  • Low temperature co-fired ceramic material with high dielectric constant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Weigh each powder according to the weight ratio given by the formula number A1 in Table 1: BaTiO 3 : 100.0 grams, Bi 2 O 3 : 6.0 g, CuO: 2.0 g, low melting point glass: 2.0 g.

[0050] Of which BaTiO 3 It is an electronic grade raw material with a purity of at least 99.0% and a particle size D50≤1.0μm.

[0051] Where Bi 2 O 3 It is an electronic grade raw material with a purity of at least 99.5% and a particle size D50≤5.0μm.

[0052] Among them, CuO is an analytically pure raw material with a purity of at least 99.0% and a particle size D50≤3.0μm.

[0053] Among them, the melting point of the low-melting glass is lower than 800°C, and the particle size D50≤2.5μm.

[0054] The preparation method of the high dielectric constant low temperature co-fired ceramic material of this embodiment is as follows:

[0055] 1) Ball mill mixing

[0056] BaTiO 3 , Bi 2 O 3 , CuO and low melting point glass are mixed according to the above weight, and 120 grams of deionized water ball mill is added...

Embodiment 2

[0063] Weigh each powder according to the weight ratio given by the formula number A2 in Table 1: BaTiO 3 : 100.0 grams, Bi 2 O 3 : 6.0g, CuO: 2.0g, low melting point glass: 2.5g, MnCO 3 : 0.2 grams.

[0064] Of which BaTiO 3 , Bi 2 O 3 , CuO and low melting point glass raw material requirements are the same as in Example 1, and the MnCO 3 It is a chemically pure raw material, and its content (calculated as Mn) is not less than 44.0%.

[0065] The preparation method of the high dielectric constant low temperature co-fired ceramic material of this embodiment is as follows:

[0066] 1) Ball mill mixing

[0067] BaTiO 3 , Bi 2 O 3 , CuO, low melting point glass and MnCO 3 Mix according to the above weight, and add 120 grams of deionized water ball mill to obtain a ceramic material mixture;

[0068] 2) Dry the ceramic material mixture after ball milling

[0069] Dry the ceramic material mixture at 150℃ for 24 hours;

[0070] 3) Screening

[0071] The dried ceramic material mixture is separated...

Embodiment 3

[0074] Weigh each powder according to the weight ratio given by the formula number A3 in Table 1: BaTiO 3 : 100.0 grams, Bi 2 O 3 : 6.0g, CuO: 2.0g, low melting point glass: 3.0g, MnCO 3 : 0.2 grams.

[0075] Of which BaTiO 3 , Bi 2 O 3 , CuO, low melting point glass and MnCO 3 The raw material requirements are the same as in Example 2.

[0076] The preparation method of the high dielectric constant low temperature co-fired ceramic material of this embodiment is as follows:

[0077] 1) Ball mill mixing

[0078] BaTiO 3 , Bi 2 O 3 , CuO, low melting point glass and MnCO 3 Mix according to the above weight, and add 120 grams of deionized water ball mill to obtain a ceramic material mixture;

[0079] 2) Dry the ceramic material mixture after ball milling

[0080] Dry the ceramic material mixture at 150℃ for 24 hours;

[0081] 3) Screening

[0082] The dried ceramic material mixture is separated with a 100-mesh screen to obtain a finished powder of high dielectric constant low-temperature co-f...

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Abstract

The invention discloses a low temperature co-fired ceramic material with high dielectric constant. The ceramic material is characterized in that the ceramic material comprises BaTiO3 and a sintering aid; the weight percentage of the BaTiO3 is 80.0-95.0%; the sintering aid comprises 0.1-10.0% of Bi2O3, 0.1-5.0% of CuO, 0.1-8.0% of low melting glass and 0.1-1.0% of MnCO3 by weight percentage. The invention also provides a method for preparing the low temperature co-fired ceramic material with high dielectric constant. The low temperature co-fired ceramic material with high dielectric constant can be used for manufacturing filters with an embedded ultra-capacitor and is helpful to integrate function materials with different characteristics. Meantime, because of good dielectric temperature character, lower dielectric loss and good insulation characteristic, the low temperature co-fired ceramic material can be expected to be used for developing novel multiple elements and functional modules.

Description

Technical field [0001] The invention relates to a ceramic material, in particular to a high-dielectric constant low-temperature co-fired ceramic material and a preparation method thereof. Background technique [0002] The dielectric constants of the existing low-temperature cofired ceramics (LTCC) are generally low, basically lower than 100. It is difficult to design and manufacture embedded ultra-large capacitors with ultra-low cut-off frequency. EMI filter. [0003] In addition, the existing commercial low-temperature co-fired ceramic materials cannot be co-fired heterogeneously with ferrite materials, and cannot form a dielectric and magnetic composite structure, which is not conducive to the development of new composite devices. Summary of the invention [0004] A technical problem to be solved by the present invention is to remedy the above-mentioned defects of the prior art and provide a high dielectric constant low temperature co-fired ceramic material. [0005] Another techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/622
Inventor 石吉伟伍隽庞新锋
Owner SHENZHEN SUNLORD ELECTRONICS
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