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Method for preparing thick film from polycrystalline ca0.4sr0.6bi4ti4o15 nano-powder with perovskite structure

A ca0.4sr0.6bi4ti4o15, perovskite structure technology, applied in the field of ceramic material preparation, can solve the problem of difficulty in accurately controlling the particle size and particle size distribution of nano-powders, expensive equipment, and difficulty in obtaining uniform and stable powder sol suspension. Liquid and other problems, to achieve the effect of narrow size distribution, good dispersion and fine particles

Inactive Publication Date: 2011-12-07
SHANDONG WOMENS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The physical method has the advantages of easy amplification and automatic control, but the equipment is expensive, and it is difficult to accurately control the particle size and particle size distribution of nanopowders.
There are many factors affecting the chemical method, but the characteristics of the product may be tailored
[0004] The shortcomings of the current nanopowder preparation method are: there are problems in the dispersion of nanopowder in the solution, and it is difficult to obtain a uniform and stable powder sol suspension

Method used

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  • Method for preparing thick film from polycrystalline ca0.4sr0.6bi4ti4o15 nano-powder with perovskite structure
  • Method for preparing thick film from polycrystalline ca0.4sr0.6bi4ti4o15 nano-powder with perovskite structure
  • Method for preparing thick film from polycrystalline ca0.4sr0.6bi4ti4o15 nano-powder with perovskite structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Polycrystalline Ca with perovskite structure 0.4 Sr 0.6 Bi 4 Ti 4 o 15 The method for preparing a thick film from a nanopowder, the specific steps are as follows:

[0033] (1) Prepare solution A with tetrabutyl titanate and acetylacetone at a ratio of 1:1 by volume: take 50ml of tetrabutyl titanate, use 50ml of acetylacetone as a chelating agent, and use a pipette to slowly dissolve 50ml of acetylacetone Slowly drop into the tetrabutyl titanate solution, and at the same time, in order to keep the temperature of the solution constant, put the beaker containing the solution in ice water at 0°C after mixing, and keep stirring the mixed solution to prevent the heat generated during the chelation process Hydrate the mixed solution; fully stir the mixed solution on a magnetic stirrer for 12 hours to obtain a clear yellow-brown transparent A solution;

[0034] (2) Weigh 77g of bismuth nitrate, 5g of strontium acetate, and 3.5g of calcium nitrate into 100ml of solvent ethy...

Embodiment 2

[0041]The mixing temperature in step (3) is 35°C; the drying time in step (4) is 8 days; other conditions are the same as in Example 1. The thick film prepared with the powder of Example 4 has a smooth surface without cracks, clear particles, large size, and a thickness of about 1.5 μm, meeting the application requirements of micro-electro-mechanical systems (MEMS).

Embodiment 3

[0043] The mixing temperature in step (3) is 25°C; the drying time in step (4) is 12 days; other conditions are the same as in Example 1. The surface of the thick film prepared by the powder of Example 3 is smooth without cracks, the particles are clear, the size is large, and the thickness reaches about 1.5 μm, which meets the application requirements of micro-electro-mechanical systems (MEMS).

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Abstract

The invention relates to the technical field of preparation of ceramic materials, in particular to a method for preparing a thick membrane by using polycrystal Ca0.4Sr0.6Bi4Ti4O15 nano powder with a perovskite structure. The invention aims to provide the method for preparing nano powder, which is simple in process, low in cost, and convenient for operation and control of a preparation process. The aim of the invention is fulfilled by adopting the following technical scheme the method for preparing the thick membrane by using polycrystal Ca0.4Sr0.6Bi4Ti4O15 nano powder with the perovskite structure synthesize the thick membrane by using acetylacetone, tetrabutyl titanate, strontium acetate, bismuth nitrate, calcium nitrate and glycol as raw materials and by using a sol-gel process. The invention has the advantage that the method has the characteristics of quickly expanding gel by combustion, avoiding large particle size, hard agglomeration and wide distribution and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of ceramic materials, in particular to a perovskite-structured polycrystalline Ca 0.4 Sr 0.6 Bi 4 Ti 4 o 15 A method for preparing thick films from nanopowders. Background technique [0002] Ca 0.4 Sr 0.6 Bi 4 Ti 4 o 15 The material has a series of important properties such as ferroelectricity, piezoelectricity, pyroelectricity, electro-optic, acousto-optic and nonlinear optics, and has high remanent polarization, low coercive field strength and high Curie temperature , low dielectric loss and other advantages, it has broad application prospects in microelectronics, optoelectronics, integrated optics and microelectromechanical systems (MEMS). [0003] The synthesis of nanopowders has become an important research field in chemistry and materials science, and the preparation of nanopowders with a certain particle size and narrow particle size distribution is particularly critical. A v...

Claims

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Application Information

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IPC IPC(8): C04B35/475C04B35/624C04B35/626
Inventor 范素华
Owner SHANDONG WOMENS UNIV
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