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Preparation method of ultrahigh-dielectric-constant potassium tantalate niobate ceramic

A technology of potassium tantalum niobate and dielectric constant is applied in the field of preparation of functional ceramic materials, which can solve the problems of low dielectric constant and limit the application, and achieve the effect of widening applications and large dielectric constant.

Inactive Publication Date: 2017-09-19
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problem that the low dielectric constant of existing potassium tantalum niobate ceramics limits its applic

Method used

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  • Preparation method of ultrahigh-dielectric-constant potassium tantalate niobate ceramic

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specific Embodiment approach 1

[0016] Specific embodiment one: the preparation method of a kind of ultra-high dielectric constant potassium tantalum niobate ceramics in this embodiment is specifically carried out according to the following steps:

[0017] 1. Preparation of rod-shaped potassium tantalum niobate powder: Add tantalum pentoxide and niobium pentoxide into aqueous potassium hydroxide solution, stir magnetically for 20 to 40 minutes, then transfer to a hydrothermal reaction kettle, at a temperature of 160°C to React at 190°C for 20h to 30h, cool to room temperature naturally after the reaction is over, wash the product with distilled water to neutrality and then put it in a vacuum drying oven. Heating for 20h to 30h under certain conditions to obtain rod-shaped potassium tantalum niobate nanopowder; the molar ratio of the tantalum pentoxide to niobium pentoxide is 1:1; the concentration of the potassium hydroxide aqueous solution is 8mol / L~ 9mol / L; The mol ratio of described niobium pentoxide and ...

specific Embodiment approach 2

[0019] Embodiment 2: This embodiment differs from Embodiment 1 in that: in step 1, stir magnetically for 20-40 minutes and then transfer to a hydrothermal reaction kettle. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0020] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in Step 1, the reaction is carried out at a temperature of 180° C. for 24 hours. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to the field of functional ceramic material preparation, in particular to a preparation method of ultrahigh-dielectric-constant potassium tantalate niobate ceramic, and aims to solve the problem that the low dielectric constant of existing potassium tantalate niobate ceramic limits the application of the potassium tantalate niobate ceramic in the field dielectric materials. The preparation method used for preparing the ultrahigh-dielectric-constant potassium tantalate niobate ceramic includes the steps of firstly, preparing rod-like potassium tantalate niobate powder; secondly, preparing the ultrahigh-dielectric-constant potassium tantalate niobate ceramic.

Description

technical field [0001] The invention relates to the field of preparation of functional ceramic materials, in particular to a preparation method of potassium tantalum niobate ceramics with high dielectric constant. Background technique [0002] The rapid development of electronic information technology, the miniaturization, integration and high capacity of electronic devices are important factors to promote the development of the microelectronics industry, so high dielectric constant materials have an increasingly important position in the field of microelectronics. When the shape of the device is determined, the higher the dielectric constant of the material, the greater the specific capacitance of the capacitor. Ferroelectric ceramics have a high dielectric constant and are one of the important electronic ceramic materials for manufacturing ferroelectric ceramic capacitors in the electronics industry. However, due to the large amount of lead element contained in traditiona...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/622C04B35/626
CPCC04B35/495C04B35/622C04B35/626C04B35/62645C04B35/6266C04B35/62675C04B2235/3201C04B2235/3251
Inventor 杨文龙林家齐陈高汝刘刚
Owner HARBIN UNIV OF SCI & TECH