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Preparation process of YMnO3 dielectric ceramic and YMnO3 dielectric ceramic capacitor

A ceramic capacitor and preparation technology, applied in the direction of fixed capacitor dielectric, fixed capacitor parts, etc., can solve the problems of long sintering time, incomplete reaction, high sintering temperature of high-density ceramics, etc., and achieve low degree of particle agglomeration , Low production cost, and the effect of reducing the sintering temperature

Inactive Publication Date: 2013-02-06
HENAN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

YMnO 3 As a dielectric ceramic material, it has attracted widespread attention of researchers due to its special ferromagnetism and ferroelectricity. However, for YMnO 3 Although the research on the performance of ceramics is relatively common, its preparation technology is relatively lagging behind, and there are few researches on its preparation technology.
Traditional YMnO 3 Most of the ceramic preparation technology adopts the principle of solid-state reaction to expand and implement. However, the preparation of high-density ceramics based on this principle often requires higher sintering temperature and longer sintering time. Because the atoms need to do long-distance migration, the reaction cannot be carried out completely. It will lead to the generation of heterogeneous and heterogeneous phases, and the preparation cycle is long, the preparation process is complicated, and it is difficult to implement

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  • Preparation process of YMnO3 dielectric ceramic and YMnO3 dielectric ceramic capacitor
  • Preparation process of YMnO3 dielectric ceramic and YMnO3 dielectric ceramic capacitor
  • Preparation process of YMnO3 dielectric ceramic and YMnO3 dielectric ceramic capacitor

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specific Embodiment approach

[0026] The specific embodiment of the present invention is set forth in detail below: YMnO 3 The preparation process of dielectric ceramics comprises the following steps:

[0027] Step 1, take by weighing the Y (NO 3 ) 3 ·6H 2 O and 99.5% pure Mn(CH 3 COO) 2 4H 2 O mixed into the container, added deionized water, then fully dissolved and stirred evenly by a magnetic stirrer, the solution concentration was adjusted to 0.2mol / L, after continuing to stir for 4h, set aside;

[0028] Step 2, in step 1 gained solution, add the C that is 99% the purity that is equimolar with solution metal ion total amount 6 h 8 o 7 ·H 2 0, and adjust the pH value of the solution to 5-6 with ammonia water. After stirring for 24 hours, the solution was evaporated in an oil bath at 120°C to obtain a fluffy block solid, and the obtained block solid was ground into powder and put into a crucible. Keep warm at 300°C for 3 hours, then naturally cool to room temperature and take out the obtained p...

Embodiment 1

[0042] YMnO 3 The preparation process of dielectric ceramics comprises the following steps:

[0043] Step 1, take by weighing the Y (NO 3 ) 3 ·6H 2 O and 99.5% pure Mn(CH 3 COO) 2 4H 2 O mixed into the container, added deionized water, then fully dissolved and stirred evenly by a magnetic stirrer, the solution concentration was adjusted to 0.2mol / L, after continuing to stir for 4h, set aside;

[0044] Step 2, in step 1 gained solution, add the C that is 99% the purity that is equimolar with solution metal ion total amount 6 h 8 o 7 ·H 2 O, and adjust the pH value of the solution to 5 with ammonia water, after stirring for 24 hours, evaporate the solution through an oil bath at 120°C to obtain a fluffy block solid, grind the obtained block solid into powder, put it into a crucible, and heat up to 300°C After heat preservation for 3 hours, then naturally cool to room temperature and take out the obtained powder, and add silicon dioxide with a purity of 1 / 10,000 of the ...

Embodiment 2

[0054] YMnO 3 The preparation technology of dielectric ceramics is characterized in that: comprising the following steps:

[0055] Step 1, take by weighing the Y (NO 3 ) 3 ·6H 2 O and 99.5% pure Mn(CH 3 COO) 2 4H 2 O mixed into the container, added deionized water, then fully dissolved and stirred evenly by a magnetic stirrer, the solution concentration was adjusted to 0.2mol / L, after continuing to stir for 4h, set aside;

[0056] Step 2, in step 1 gained solution, add the C that is 99% the purity that is equimolar with solution metal ion total amount 6 h 8 o 7 ·H 2 O, and adjust the pH value of the solution to 6 with ammonia water. After stirring for 24 hours, evaporate the solution through an oil bath at 120°C to obtain a fluffy block solid. Grind the obtained block solid into powder, put it into a crucible, and heat up to 300°C. After heat preservation for 3 hours, then naturally cool to room temperature and take out the obtained powder, and add silicon dioxide wi...

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Abstract

The invention relates to a preparation process and application of ceramic, in particular to a preparation process of YMnO3 dielectric ceramic and a YMnO3 dielectric ceramic capacitor. In order to solve the problems of complicated procedures, poor provenance of finished products and the like in an existing preparation process of YMnO3 dielectric ceramic, the YMnO3 dielectric ceramic is prepared by the aid of a sol-gel method and by means of mixing and dissolving ingredients, adding corresponding catalysts or complexing agents, drying, pyrolyzing, grinding, presintering and firing. The obtained YMnO3 dielectric ceramic can be prepared to the YMnO3 dielectric ceramic capacitor and other ceramic products.

Description

technical field [0001] The present invention relates to a kind of preparation method and application of dielectric ceramics, specifically a kind of YMnO 3 Preparation Technology of Dielectric Ceramics and YMnO 3 Dielectric ceramic capacitors. Background technique [0002] Multiferroic materials not only possess a variety of single ferroic properties (such as ferroelectricity, ferromagnetism, and ferroelasticity), but also can produce some new functions through the coupling and synergy of ferroic properties, which greatly broadens the application of multiferroic materials. range, and thus received widespread attention. (M. Fiebig et al, Phys. Rev. Lett. 2000, 84, 5620; Joonghoe D et al, Appl. Phys. Lett. 2005, 87, 252504; F. Schrettle et al, Phys. Rev. Lett. 2009, 102, 207208) Hexagonal rare earth manganese oxide is a single-phase multiferroic material (ferroelectric magnet) integrating ferroelectricity and antiferromagnetism. One of the hot issues that have received wide...

Claims

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Application Information

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IPC IPC(8): C04B35/622C04B35/50H01G4/12
Inventor 张超许玉洁李同伟康大伟李立本
Owner HENAN UNIV OF SCI & TECH
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