Photoluminescent crystal material europium potassium borate, and preparation method and application thereof
A crystalline material and photoluminescence technology, applied in the directions of luminescent materials, polycrystalline material growth, crystal growth, etc., can solve the problems of weak research and not yet formed a perfect theoretical system, and achieve simple synthesis methods, excellent luminescence properties, and cheap raw materials. easy-to-get effect
Inactive Publication Date: 2016-05-04
HENAN POLYTECHNIC UNIV
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In addition, the research on borate luminescent materials mainly focuses on preparation methods, performance characterization and structure speculation. The research on the mechanism and influencing factors of material luminescence is still relatively weak, and a perfect theoretical system has not yet been formed. Further theoretical research needs to be strengthened.
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[0015] Potassium Europium Borate K 5 / 2 Eu 5 / 6 (B 5 o 10 ) crystal preparation: the method for crystal growth of the present invention is called high-temperature solution method, also known as flux method, and this method is to dissolve crystal components in a flux lower than its melting point at high temperature to form a uniform saturated solution. Afterwards, a supersaturated solution is formed by slowly lowering the temperature or other methods to precipitate crystals. In this experiment, the part of K other than the crystal composition is used 2 O-B 2 o 3 System, due to the low melting point, it is equivalent to a self-fluxing agent, so that the raw material is both the target crystal and the fluxing agent, which has great flexibility and avoids the entry of other impurities. The specific operation steps are as follows: the raw material K 2 CO 3 、Eu 2 o 3 and B 2 o 3 Accurately weigh on an electronic balance according to the molar ratio of 10:1:20, because the ...
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The present invention discloses a photoluminescent crystal material europium potassium borate, and a preparation method and application thereof, and belongs to the technical field of rare earth luminescent materials. A technical scheme has the key points of: the photoluminescent crystal material europium potassium borate has a chemical formula of K5 / 2Eu5 / 6(B5O10), and belongs to the trigonal system, chiral space group of R32; and the unit cell parameters are as below: a=b=1.326nm, c=1.538nm, alpha=beta= 90DEG, and gamma=120 DEG. The method is as below: synthesizing europium potassium metaborate monocrystals by a high temperature solution method; placing an evenly ground raw material mixture in a platinum crucible, placing the crucible in a box-type oven for heating synthesis; keeping a constant temperature at the maximum temperature, then slowly cooling down to room temperature to obtain the monocrystals of the compound. The crystal material can be excited by 390nm light to emit bright red fluorescence, and can be used in fluorescent luminescent materials and devices to meet the demand of electronic industry, public place display and home appliance display.
Description
technical field [0001] The invention belongs to the technical field of rare earth luminescent materials, and in particular relates to a photoluminescent crystal material europium potassium borate and a preparation method and application thereof. Background technique [0002] Luminescent materials are indispensable substances in people's daily life. The application of fluorescent materials in decoration, advertising signs, energy saving and other projects is particularly prominent, and new requirements are also put forward for various technical indicators of fluorescent materials. Therefore, it is more and more urgent to find new luminescent materials with the characteristics of high efficiency, stability and high color purity. In the development process of luminescent materials and luminescent optics, rare earth luminescent materials play a milestone role, and rare earth elements play a more important role than other elements. Rare earth luminescent materials mainly include...
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IPC IPC(8): C30B29/10C30B9/12C09K11/78
CPCC09K11/774C30B9/12C30B29/10
Inventor 赵丹张利伟王勤马法学张荣花李飞飞李英杰
Owner HENAN POLYTECHNIC UNIV