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A kind of perovskite structure nano ceramic material and preparation method thereof

A perovskite structure and nano-ceramic technology, applied in the field of nano-ceramics, can solve the problems of poor dielectric temperature stability and large environmental pollution, and achieve the effects of high dielectric constant, no environmental pollution, and improved dielectric properties.

Active Publication Date: 2022-07-22
SHENZHEN INST OF ADVANCED ELECTRONICS MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present application provides a perovskite structure nano-ceramic material to solve the problems of existing high dielectric materials that pollute the environment or have poor dielectric temperature stability

Method used

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  • A kind of perovskite structure nano ceramic material and preparation method thereof
  • A kind of perovskite structure nano ceramic material and preparation method thereof
  • A kind of perovskite structure nano ceramic material and preparation method thereof

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preparation example Construction

[0044] Another aspect of the present application provides a method for preparing a perovskite-structured nano-ceramic material, comprising the following steps:

[0045] S1 prepares a solution containing A, A', B and B' according to a preset ratio;

[0046] S2 adds an alkaline solution to the solution, adjusts the pH value of the solution to alkaline, and continues the reaction until the solid is separated out;

[0047] S3 separates the solid to obtain a precursor;

[0048] S4 roasts the precursor at high temperature to obtain a nano-ceramic material;

[0049] in,

[0050] Said A and said A' are selected from La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu;

[0051]The B and the B' are selected from Co, Fe, Ni, Mn, Cr, Cu.

[0052] In order to clearly illustrate the present invention, the experimental procedures of steps S1-S4 are described in detail below respectively.

[0053] In the described step S1, the preset proportioning refers to the ABO to be prepared ...

Embodiment 1

[0060] S1 Dissolve cobalt sulfate, iron sulfate, lanthanum sulfate and cerium sulfate in deionized water, ultrasonicate for 10 minutes, and stir for 1 hour until a homogeneous solution is formed, wherein, calculated in molar ratio, cobalt sulfate: iron sulfate: lanthanum sulfate: cerium sulfate is 0.8:0.2:0.7:0.3.

[0061] S2 was added dropwise a sodium carbonate solution with a concentration of 1 mol / L into the solution to make the pH of the solution=10, and the solution was continuously stirred on a magnetic stirrer for 2 hours until the solid substance was fully separated.

[0062] S3 Centrifuge the reaction solution obtained in step S1 for 5 min at a rotating speed of 8000 rpm, and analyze to obtain a solid product. The mixed solution of ethanol and deionized water is used to centrifuge and wash the product for 3 times, and it is dried at 60 °C for 12 h to obtain hydrogen. oxide precursor.

[0063] S4 The precursor prepared in step S3 is placed in a tube furnace, and calc...

Embodiment 2

[0065] S1 Dissolve cobalt sulfate, nickel sulfate, lanthanum sulfate and cerium sulfate in deionized water, ultrasonicate for 10 minutes, and stir for 1 hour until a homogeneous solution is formed, wherein, calculated in molar ratio, cobalt sulfate: nickel sulfate: lanthanum sulfate: cerium sulfate is 0.8:0.2:0.7:0.3.

[0066] S2 was added dropwise a sodium carbonate solution with a concentration of 1 mol / L into the solution to make the pH of the solution=10, and the solution was continuously stirred on a magnetic stirrer for 2 hours until the solid substance was fully separated.

[0067] S3 Centrifuge the reaction solution obtained in step S1 for 5 min at a rotating speed of 8000 rpm, and analyze to obtain a solid product. The mixed solution of ethanol and deionized water is used to centrifuge and wash the product for 3 times, and it is dried at 60 °C for 12 h to obtain hydrogen. oxide precursor.

[0068] S4 The precursor prepared in step S3 is placed in a tube furnace, and ...

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Abstract

The present application provides a perovskite-structured nano-ceramic material and a preparation method thereof, and the general formula of its chemical composition is A x A’ 1‑x B y B’ 1‑ y O 3 , where 0.5≤x≤0.8; 0.7≤y≤0.9; A and A' are selected from La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu ; B and B' are selected from Co, Fe, Ni, Mn, Cr, Cu. In this application, double-ion doped nanomaterials with perovskite structure were prepared by wet chemical-roasting method. 3 The A-site and B-site ions of the perovskite material are doped to improve the dielectric properties of the material. The experimental results show that the dielectric constant of the nano-ceramic material prepared by the present invention is high at room temperature, and in the temperature range of 100°C to 400°C, the change range of the dielectric constant of the material is very small, and the dielectric temperature stability is good.

Description

technical field [0001] The present application relates to the technical field of nano-ceramics, in particular to a nano-ceramic material with a high dielectric perovskite structure and a preparation method thereof. Background technique [0002] With the rapid development of the microelectronics technology industry, people have higher and higher requirements for the performance of electronic products, and electronic devices are constantly developing in the direction of miniaturization and diversification. In order to meet this demand, dielectric materials with high dielectric constant, low dielectric loss, and high energy storage density have become the direction of research and development. [0003] At present, high dielectric materials are mainly divided into two categories; (1) metal oxides, such as Al 2 O 3 , Ta 2 O 3 etc.; (2) Multi-element oxides, among which lead zirconate titanate (PZT) and barium titanate are the most concerned. PZT has excellent high dielectric...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/50C04B35/622
CPCC04B35/50C04B35/622C04B2235/96C04B2235/448C04B2235/3275C04B2235/3272C04B2235/3279C04B2235/3224C04B2235/3229
Inventor 李佳孙雍荣
Owner SHENZHEN INST OF ADVANCED ELECTRONICS MATERIALS
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