Preparing process of double-perovskite Y2MNCoO6 dielectric ceramic

A double perovskite and preparation technology, which is applied in the field of dielectric ceramic production, can solve the problems of difficult implementation of the process, excessive impurities in the finished product, and high production cost, and achieve the effect of narrow particle distribution, high purity, and easy implementation

Inactive Publication Date: 2013-02-06
HENAN UNIV OF SCI & TECH
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Problems solved by technology

[0003] To solve the above Y 2 McO 6 The production cost of dielectric ceramic materials is too high, the process is difficult to implement, and the finished product has too many impurities and poor appearance. The invention provides a double perovskite Y 2 McO 6 The preparation process of dielectric ceramics, the process is low in cost, easy to operate, and the finished product has no impurity phase, which can effectively avoid the above problems

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specific Embodiment approach

[0019] Set forth below the specific embodiment of the present invention: a kind of double perovskite Y 2 McO 6 The preparation technology of dielectric ceramics is characterized in that: comprising the following steps:

[0020] Step 1, according to the mol ratio of 2:1:1, take by weighing Y (NO 3 ) 3 ·6H 2 O, the purity is 99.5% Mn(CH 3 COO) 2 4H 2 O and 99.5% pure Co(CH 3 COO) 2 4H 2 O mixed, added deionized water to dissolve, then fully dissolved and stirred evenly by a magnetic stirrer, and the concentration of the solution was adjusted to 0.2mol / L, after continuing to stir for 4h, set aside;

[0021] 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, after stirring for 24 hours, adjust the pH value of the solution to 5.5-6.5 with ammonia water, evaporate the solution through an oil bath at 120°C to obtain a fluffy block solid, grind the obtained block solid into powder, ...

Embodiment 1

[0031] A double perovskite Y 2 McO 6 The preparation process of dielectric ceramics comprises the following steps:

[0032] Step 1, according to the mol ratio of 2:1:1, take by weighing Y (NO 3 ) 3 ·6H 2 O, the purity is 99.5% Mn(CH 3 COO) 2 4H 2 O and 99.5% pure Co(CH 3 COO) 2 4H 2 O mixed, added deionized water to dissolve, then fully dissolved and stirred evenly by a magnetic stirrer, and the concentration of the solution was adjusted to 0.2mol / L, after continuing to stir for 4h, set aside;

[0033] 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, after stirring for 24 hours, adjust the pH value of the solution to 5.5 with ammonia water, 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 keeping it warm for 3 hours, it was naturally cooled to ...

Embodiment 2

[0040] A double perovskite Y 2 McO 6 The preparation process of dielectric ceramics comprises the following steps:

[0041] Step 1, according to the mol ratio of 2:1:1, take by weighing Y (NO 3 ) 3 ·6H 2 O, the purity is 99.5% Mn(CH 3 COO) 2 4H 2 O and 99.5% pure Co(CH 3 COO) 2 4H 2 O mixed, added deionized water to dissolve, then fully dissolved and stirred evenly by a magnetic stirrer, and the concentration of the solution was adjusted to 0.2mol / L, after continuing to stir for 4h, set aside;

[0042] 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, after stirring for 24 hours, adjust the pH value of the solution to 6.5 with ammonia water, 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 keeping it warm for 3 hours, it was naturally cooled to ...

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Abstract

The invention provides a preparing process of double-perovskite Y2MnCoO6 dielectric ceramic, relates to a ceramic preparing process and aims at solving the defects existing in the traditional preparing process of Y2MnCoO6 dielectric ceramic that the process is heavy and complicated, the finished product is poor in condition and the like. The invention provides a sol-gel method, comprising the steps of: mixing and dissolving ingredients, adding corresponding catalyst or complexing agent, drying, pyrolyzing, grinding, prefiring, and firing to prepare Y2MnCoO6 dielectric ceramic. The obtained Y2MnCoO6 dielectric ceramic can be widely applied to the field of ceramic things.

Description

technical field [0001] The present invention relates to a kind of preparation method of dielectric ceramics, specifically a kind of double perovskite Y 2 McO 6 Preparation process of dielectric ceramics. Background technique [0002] In the late 1990s, researchers discovered that there are a series of unconventional high-temperature superconductivity, room temperature giant magnetoresistance effect and room temperature tunneling giant magnetoresistance effect (TMR) in the double perovskite oxide system, which makes the double perovskite oxide The study of physical systems has received high attention both theoretically and experimentally (K. D. Truong et al, Phys. Rev. B, 2007, 76, 132413; N. S. Rogado et al, Adv. Mater., 2005, 17, 2225 ; S. M. Zhou et al, Appl. Phys.Lett., 2007, 91, 172505), due to its special catalytic, magnetic, dielectric and giant magnetoresistance properties, double perovskite oxide has so far become an important research topic in condensed matter phy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/505C04B35/622
Inventor 张超许玉洁王晓飞闫海涛王晓燕
Owner HENAN UNIV OF SCI & TECH
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