Sheet bismuth sodium titanate mould plate grain and manufacture method thereof

A bismuth sodium titanate, flaky technology, which is applied in the field of flaky sodium bismuth titanate template grains and its preparation, can solve the problems such as difficult preparation of template grains, achieve strong orientation, simple preparation method, and low price Effect

Active Publication Date: 2008-08-20
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention successfully solves the problem of flaky Na 0.5 Bi 0.5 TiO 3 Difficulty in preparing template grains

Method used

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  • Sheet bismuth sodium titanate mould plate grain and manufacture method thereof
  • Sheet bismuth sodium titanate mould plate grain and manufacture method thereof
  • Sheet bismuth sodium titanate mould plate grain and manufacture method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Precursor synthesis: according to Bi 4 Ti 3 o 12 Calculate the reaction equation, accurately weigh Bi 2 o 3 (purity: 99.9%) 7.9621g, TiO 2 (purity: 99.8%) 2.0500g, NaCl (purity: 100%) 4.4053g and KCl (purity: 99%) 5.6634g, each raw material and ethanol 10ml, ZrO 2 After 40 g of balls were mixed and milled for 24 hours, they were transferred to a glass container for drying. After the dried raw material powder is sieved, it is filled with Al 2 o 3The crucible was covered, and synthesized in a high-temperature furnace at 1100°C for 0.5h, with a heating rate of 5°C / min.

[0027] 2. Precursor filtration: the synthesized Bi 4 Ti 3 o 12 The precursor was pulverized, ultrasonically dispersed, and washed with deionized water 10 times to remove NaCl and KCl molten salts. figure 1 is the resulting Bi 4 Ti 3 o 12 It can be seen from the XRD pattern of the precursor that the intensity of the (001) diffraction peak is enhanced and has a strong orientation; the SEM ph...

Embodiment 2

[0031] 1. Precursor synthesis: according to Bi 4 Ti 3 o 12 The reaction equation calculation, accurate weighing Bi 2 o 3 (purity: 99.9%) 7.9621g, TiO 2 (purity: 99.8%) 2.0501g, NaCl (purity: 100%) 4.4055g and KCl (purity: 99%) 5.6635g, each raw material and ethanol 7ml, ZrO 2 After 40 g of balls were mixed and milled for 24 hours, they were transferred to a glass container for drying. After the dried raw material powder is sieved, it is filled with Al 2 o 3 The crucible was covered, and synthesized in a high-temperature furnace at 1100°C for 0.5h, with a heating rate of 5°C / min.

[0032] 2. Precursor filtration: the synthesized Bi 4 Ti 3 o 12 The precursor was pulverized, ultrasonically dispersed, and washed with deionized water 10 times to remove NaCl and KCl molten salts. The produced Bi 4 Ti 3 o 12 Precursor, its XRD pattern is as follows figure 1 As shown, it can be seen from the figure that the intensity of the (001) diffraction peak is enhanced and has a s...

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Abstract

The invention relates to a schistic bismuth sodium titanate template crystal grain and a preparation method thereof, belonging to the preparation field of textured non-lead piezoelectric ceramic template crystal grain, the chemical formula of the template grains is Na0.5Bi0.5TiO3, the appearance of the crystal grain is schistic, the radial length is 5 to 15Mum, the thickness is 0.5 to 1.0Mum, the crystal grain has large aspect ratio and strong orientation, which is an ideal template crystal grain. The crystal grain adopts schistic Bi4Ti3O12 as a precursor which is synthesized by molten salt method, in the molten salt system of NaCl, the crystal grain can have topological chemical reaction with Na2CO3, TiO2 so as to produce schistic polycrystalline Na0.5Bi0.5TiO3 template crystal grain and the crystal grain can be regarded as the template for various textured bismuth sodium tianate non-lead piezoelectric ceramics, which has positive effect for improving the density, the orientation and piezoelectric properties of textured bismuth sodium tianate non-lead piezoelectric ceramics.

Description

technical field [0001] The invention relates to a flaky sodium bismuth titanate template grain and a preparation method thereof, belonging to the field of preparation of textured lead-free piezoelectric ceramic template grains. Background technique [0002] Ferroelectric piezoelectric ceramics and their devices are widely used in industry, civilian products and military affairs. They are an important and irreplaceable high-tech material with fierce international competition. At present, most of the commonly used piezoelectric ceramics are lead-containing ceramics, such as PZT, PMN-PT, etc. These lead-based piezoelectric ceramics show excellent performance near their quasi-isomorphic phase boundaries. However, the toxicity of lead and its environmental pollution have caused more and more serious impacts on human society. In recent years, the development and environment-friendly lead-free piezoelectric ceramics have attracted more and more researchers' attention. [0003] Am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/462C04B35/475C04B35/622
Inventor 李永祥伍萌佳
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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