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Strontium barium sodium niobate tungsten bronze type piezoelectric ceramic material with low sintering temperature and anisotropy and preparation method thereof

A technology of strontium barium niobate sodium tungsten bronze and low sintering temperature, which is applied in the field of tungsten bronze structural ceramic materials, can solve the problems of deteriorating sintering behavior, reducing density, and deteriorating performance, so as to reduce energy loss, increase density, and excellent Effects of Dielectric and Ferroelectric Properties

Active Publication Date: 2022-01-04
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the lower surface energy of the (001) plane of the tungsten bronze structure compound, its growth rate is significantly higher than that of other crystal planes, which makes the (001) direction of the tungsten bronze structure lead-free niobate material in the high temperature sintering process If the growth rate is too fast, it is easy to produce anisotropic rod-shaped grains, which will deteriorate its sintering behavior, reduce the density, and further deteriorate its various properties

Method used

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  • Strontium barium sodium niobate tungsten bronze type piezoelectric ceramic material with low sintering temperature and anisotropy and preparation method thereof
  • Strontium barium sodium niobate tungsten bronze type piezoelectric ceramic material with low sintering temperature and anisotropy and preparation method thereof
  • Strontium barium sodium niobate tungsten bronze type piezoelectric ceramic material with low sintering temperature and anisotropy and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. Ingredients

[0034] According to Sr 1.4 Ba 0.6 NaNb 5 o 15 The stoichiometric ratio, respectively weighed SrCO with a purity of 99.00% 3 5.9873g of BaCO with a purity of 99.00% 3 3. 4300g of Na with a purity of 99.80% 2 CO 3 1.5229g of Nb with a purity of 99.99% 2 o 5 19.0598g, mixed evenly and put into a nylon jar, using zirconium balls as grinding balls and absolute ethanol as ball milling media, using a ball mill with a speed of 401 rpm to fully mix and ball mill for 24 hours, separate the zirconium balls, and dry at 80°C After 24 hours, grind in a mortar for 30 minutes to obtain a raw material mixture.

[0035] 2. Pre-burning

[0036] Put the raw material mixture in an alumina crucible, compact it with an agate rod, cover it, place it in a resistance furnace, raise the temperature to 1230°C at a heating rate of 3°C / min, keep it warm for 6 hours, and cool it down to room temperature naturally with the furnace, then take it out of the furnace , Grind...

Embodiment 2

[0046] In step 3 of this embodiment, 20 g of calcined powder and 0.1 g of CuO with a purity of 99.99% are packed into a nylon tank, and the other steps are the same as in Example 1 to obtain a structural formula of Sr 1.4 Ba 0.6 NaNb 5 o 15 +0.5wt.% CuO barium strontium niobate sodium tungsten bronze piezoelectric ferroelectric ceramic material.

Embodiment 3

[0048] In step 3 of this embodiment, put 20 g of calcined powder and 0.15 g of CuO with a purity of 99.99% into a nylon tank; Raise the temperature to 1000°C, then raise the temperature to 1230°C at a rate of 3°C / min, keep the temperature for 30 minutes, continue to cool down to 1180°C at a rate of 3°C / min, keep the temperature for 2 hours, and cool down to room temperature naturally with the furnace, other steps are the same as Embodiment 1 is identical, obtains structural formula and is Sr 1.4 Ba 0.6 NaNb 5 o 15 +0.75wt.% CuO strontium barium sodium tungsten bronze type piezoelectric ceramic material.

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Abstract

The invention discloses a strontium barium sodium niobate tungsten bronze type piezoelectric ceramic material with low sintering temperature and anisotropy and a preparation method thereof. The structural general formula of the ceramic material is Sr1.4Ba0.6NaNb5O15+xwt.%M, M is CuO or MnO2, and the value of x is 0.25-1.0. According to the invention, Sr1.4Ba0.6NaNb5O15 is modified by doping Cu and Mn, so that the sintering temperature of ceramic is greatly reduced, the energy consumption of the ceramic in the sintering process is reduced, and the ceramic is energy-saving and environment-friendly; and meanwhile, the anisotropy of the modified ceramic is obviously reduced after Cu and Mn are doped, the density is obviously improved, the electrical property is further improved, and the obtained ceramic material has a relatively high dielectric constant and relatively low dielectric loss, and in addition, the ceramic material has a relatively good ferroelectric property. The ceramic material disclosed by the invention is simple in preparation method, low in cost, good in repeatability and high in yield, and is expected to provide powerful reference for modification research of the lead-free niobate material with the oriented growth tungsten bronze structure.

Description

technical field [0001] The invention belongs to the technical field of tungsten bronze structural ceramic materials, in particular to a strontium barium barium niobate sodium tungsten bronze piezoelectric ferroelectric ceramic material with low sintering temperature and low anisotropy and a preparation method thereof. Background technique [0002] With the advancement of society and the development of science and technology, materials are becoming increasingly intelligent, integrated, and multifunctional. As an important class of dielectric materials, piezoelectric materials have higher requirements for miniaturization and environmental protection of electronic components. Its production and practical application require piezoelectric ferroelectric materials to have relatively stable and excellent dielectric and ferroelectric properties, but the current material systems can hardly meet the requirements. Therefore, a lead-free piezoelectric ferroelectric with excellent perform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622C04B35/64
CPCC04B35/495C04B35/622C04B35/64C04B2235/3281C04B2235/3267C04B2235/3215C04B2235/3213C04B2235/3201C04B2235/6562C04B2235/6567C04B2235/668C04B2235/77C04B2235/96
Inventor 魏灵灵郝蕊由扬帆杨祖培
Owner SHAANXI NORMAL UNIV
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