Lead-free piezoelectric potassium sodium niobate optoelectronic multifunctional material and preparation method thereof
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A potassium sodium niobate, lead-free piezoelectric technology, applied in the field of information functional ceramic materials, to achieve high luminous characteristics, good stability, and excellent performance
Inactive Publication Date: 2014-05-14
INNER MONGOLIA UNIV OF SCI & TECH
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[0005] According to the data investigated so far, there is no relevant report on how to obtain high-efficiency KNN-based lead-free piezoelectric luminescent materials.
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Embodiment 1
[0033] Prepared by traditional solid-state reaction sintering process (K 0.5 Na 0.5 ) 1-y-x m y ln x Nb 1-y Ti y o 3 Ceramics, wherein Ln is selected from Pr, M is selected from Ca, wherein x=0.002, y=0.05, that is (K 0.5 Na 0.5 ) 0.948 Ca 0.05 PR 0.002 Nb 0.95 Ti 0.05 o 3 . Metal carbonate or metal oxide as raw material, K 2 CO 3 (99%), Na 2 CO 3 (98%), Nb 2 o 5 (99.5%), P 6 o 11 (99%), CaCO 3 (99.99%), TiO 2 (99.6%), and the raw materials were fully dried before weighing.
[0034] (1) Weigh 7.543 grams of Na 2 CO 3 , 9.925 g K 2 CO 3 , 1.503 g CaCO 3 , 37.911 g Nb 2 o 5 , 1.210 g TiO 2
[0035] and 0.102 g P 6 o 11 As raw materials, put them into a polytetrafluoroethylene ball mill jar after mixing, use ethanol as the grinding medium, and use ZrO 2 As a grinding ball, wet ball milling for 24 hours, slurry filtration, washing, drying, and sieving to obtain a uniformly mixed batch;
[0036] (2) Put the sieved powder into an alumina cr...
Embodiment 2
[0040] Preparation (K 0.5 Na 0.5 ) 1-y-x m y ln x Nb 1-y Ti y o 3 , wherein Ln is selected from Pr, and M is selected from Ca, wherein x=0.002, y=0.03, 0.1, 0.2; namely (K 0.5 Na 0.5 ) 0.998-y Ca y PR 0.002 Nb 1-y Ti y o 3 :(K 0.5 Na 0.5 ) 0.968 Ca0.03 PR 0.002 Nb 0.97 Ti 0.03 o 3 , (K 0.5 Na 0.5 ) 0.898 Ca 0.1 PR 0.002 Nb 0.9 Ti 0.1 o 3 , (K 0.5 Na 0.5 ) 0.798 Ca 0.2 PR 0.002 Nb 0.8 Ti 0.2 o 3 . The selected raw materials were weighed according to the stoichiometric ratio, mixed and put into a polytetrafluoroethylene ball mill tank, with ethanol as the grinding medium and ZrO 2 As grinding balls, wet ball milling for 24 hours, slurry filtration, washing, drying, and sieving to obtain a uniformly mixed batch; the sieved powder is put into an alumina crucible for pre-calcination, and the pre-calcination temperature is 850 o C,880 o C, 900 o C, keep warm for 6 hours, cool down to room temperature naturally with the furnace, and then carry ...
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Abstract
The invention relates to a lead-free piezoelectric potassium sodium niobate optoelectronic multifunctional material and a preparation method thereof and belongs to the technical field of luminescent materials. According to the invention, the fluorescence property and the piezoelectric property of a lead-free piezoelectric potassium sodium niobate material are remarkably increased by utilizing the synergistic combination effect between rare earth ion and metal ion. The multifunctional material disclosed by the invention comprises the following components in percentage by mass: (K0.5Na0.5) (1-y-x) MyLnxNb (1-y) TiyO3, wherein the Ln is selected from at least one of Sm, Pr and Eu; M is one or more than one ion in metal elements Ca, Sr and Ba; x is greater than 0 and less than or equal to 0.05; y is greater than 0 and less than or equal to 0.2. The multifunctional material disclosed by the invention is formed by mixing a certain amount of rare earth element into (K0.5Na0.5) NbO3 (KNN) host material with a perovskite structure; in the meantime, a ferroelectric material MTiO3(M is Ca, Sr and Ba) with the same structure is added to form a solid solution together with the KNN to ensure that the material has excellent luminescence property; therefore, the multifunctional material has a blue light-excited photoluminescence characteristic and has the piezoelectric property and the ferroelectric property per se at the same time and has potential application prospect in the field of optoelectronic integration devices.
Description
technical field [0001] The invention specifically relates to a novel lead-free piezoelectric potassium sodium niobate-based optical-electrical multifunctional material and a preparation method thereof, belonging to the field of information functional ceramic materials. Background technique [0002] With the rapid development of the new generation of electronic information technology, components with information functional materials as the core are developing in the direction of miniaturization, integration, multi-function and intelligence. Correspondingly, information functional materials are facing new challenges, and material researchers are urgently required to actively explore and expand their new functions while in-depth research and continuous improvement of the inherent physical properties of materials, that is, to develop the multifunctional properties of materials, thereby broadening their applications. field. Piezoelectric and ferroelectric materials, as typical m...
Claims
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