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Eu-Bi codoped tungsten bronze structure light emitting ferroelectric ceramic material with high light emitting heat stability and preparation method thereof

A technology of ferroelectric ceramics and thermal stability, applied in the field of ceramic materials, can solve the problems of single material performance, deterioration of electrical performance, and limited application

Active Publication Date: 2017-10-17
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventor's research group has studied tungsten bronze (Sr 0.925 Ca 0.075 ) 2.5-0.5x Na x Nb 5 o 15 The relationship between the structure and performance, it was found that the closer the structure is to the full type, the better the performance, but it is easy to produce the second phase to deteriorate the electrical performance
Moreover, this ceramic material only has electrical properties. Considering the current development of high intelligence and high integration of materials, this material has a single performance, which limits its application and cannot meet the latest material design concepts.

Method used

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  • Eu-Bi codoped tungsten bronze structure light emitting ferroelectric ceramic material with high light emitting heat stability and preparation method thereof
  • Eu-Bi codoped tungsten bronze structure light emitting ferroelectric ceramic material with high light emitting heat stability and preparation method thereof
  • Eu-Bi codoped tungsten bronze structure light emitting ferroelectric ceramic material with high light emitting heat stability and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. According to Sr 1.90 Ca 0.15 Na 0.801 Eu 0.03 Bi 0.003 Nb 5 o 15 The stoichiometry was weighed separately for Na with a purity of 99.80%. 2 CO 3 0.8409g of SrCO with a purity of 99.00% 3 5.6016g of Nb with a purity of 99.99% 2 o 5 13.1394 g of CaCO with a purity of 99.00% 3 0.2998g of Eu with a purity of 99.99% 2 o 3 0.1044g of Bi with a purity of 99.99% 2 o 3 0.0138g, put it into a nylon jar, use zirconium balls as the balls and absolute ethanol as the ball milling medium, use a ball mill at 401 rpm for 24 hours, place it in a drying oven at 80°C for 15 hours, and grind it with a mortar for 30 Minutes, pass through 80 mesh sieves, obtain raw material mixture.

[0021] 2. Put the raw material mixture in an alumina crucible and compact it with an agate rod to make the compacted density 1.5g / cm 3 , cover it, place it in a resistance furnace, heat it up to 1220°C at a rate of 3°C / min and pre-fire it for 6 hours, cool it down to room temperature natu...

Embodiment 2

[0024] In step 1 of this embodiment, according to Sr 1.90 Ca 0.15 Na 0.795 Eu 0.03 Bi 0.005 Nb 5 o 15 The stoichiometry was weighed separately for Na with a purity of 99.80%. 2 CO 3 0.8345g of SrCO with a purity of 99.00% 3 5.6008g of Nb with a purity of 99.99% 2 o 5 13.1375 g of CaCO with a purity of 99.00% 3 0.2998g of Eu with a purity of 99.99% 2 o 3 0.1044g of Bi with a purity of 99.99% 2 o 3 0.0230g, and the other steps were the same as in Example 1 to obtain a Eu-Bi co-doped tungsten bronze structure luminescent ferroelectric ceramic material.

Embodiment 3

[0026] In step 1 of this embodiment, according to Sr 1.90 Ca 0.15 Na 0.786 Eu 0.03 Bi 0.008 Nb 5 o 15 The stoichiometry was weighed separately for Na with a purity of 99.80%. 2 CO 3 0.8249g of SrCO with a purity of 99.00% 3 5.5996g of Nb with a purity of 99.99% 2 o 5 13.1347 g of CaCO with a purity of 99.00% 3 0.2997g of Eu with a purity of 99.99% 2 o 3 0.1043g of Bi with a purity of 99.99% 2 o 3 0.0368g, and the other steps were the same as in Example 1 to obtain a Eu-Bi co-doped tungsten bronze structure luminescent ferroelectric ceramic material.

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Abstract

The invention discloses a Eu-Bi codoped tungsten bronze structure light emitting ferroelectric ceramic material with high light emitting heat stability and a preparation method of the Eu-Bi codoped tungsten bronze structure light emitting ferroelectric ceramic material. The general molecular formula of the ceramic material is Sr1.90Ca0.15Na0.18-3xEuyBixNb5O15, wherein x is 0.003-0.008, y is 0.02-0.06, the ceramic material is prepared through a traditional high temperature solid phase method, the cost of the preparation method is low, and the operation of the preparation method is convenient. The Eu and the Bi are doped in the ceramic material, so that the ceramic material has a light emitting performance, the light emitting heat stability of the ceramic material is obviously improved, the dielectric and ferroelectric performances are improved, wherein when x is equal to 0.005 and y is equal to 0.03, the light emitting heat stability is 67%, the maximum dielectric constant is 1345, the Curie temperature is 272 DEG C, the remanent polarization is 4.29 muC / cm<2>, and the coercive field is 21.41 kV / cm.

Description

technical field [0001] The invention belongs to the technical field of ceramic materials, and in particular relates to a Eu-Bi co-doped tungsten bronze structure luminescent ferroelectric ceramic material with high luminous thermal stability and a preparation method thereof. Background technique [0002] In recent years, in addition to researching and improving piezoelectric ferroelectric properties to replace lead-containing materials, lead-free piezoelectric ferroelectric materials have also discovered new functional characteristics in energy storage, strain, electric card, thermoelectricity, photoelectricity, and luminescence, which have attracted more and more attention. more and more attention. The tungsten bronze system is an indispensable and important branch of the lead-free piezoelectric ferroelectric material system, and the general composition formula is (A1) 2 (A2) 4 C 4 (B1) 2 (B2) 8 o 30 , different metal cations selectively occupy the five non-equivalent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/63
CPCC04B35/495C04B35/6303C04B2235/3201C04B2235/3208C04B2235/3224C04B2235/3298C04B2235/5427C04B2235/5463C04B2235/602C04B2235/656C04B2235/6562C04B2235/6567
Inventor 魏灵灵郝胜兰杨祖培晁小练
Owner SHAANXI NORMAL UNIV
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