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Preparation method, performance and application of novel green light-emitting material terbium lead multi-borate

A luminescent material, terbium lead borate technology, applied in the direction of luminescent material, polycrystalline material growth, boron compound, etc., to achieve the effect of simple process, low cost, high chemical stability and thermal stability

Inactive Publication Date: 2017-07-21
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Related work on this compound has not been reported so far

Method used

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  • Preparation method, performance and application of novel green light-emitting material terbium lead multi-borate
  • Preparation method, performance and application of novel green light-emitting material terbium lead multi-borate
  • Preparation method, performance and application of novel green light-emitting material terbium lead multi-borate

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Embodiment 1

[0014] Embodiment 1: grow compound PbTbB by cosolvent method 7 o 13 Single crystals with a size of about 0.1 mm are suitable for single crystal diffraction experiments to determine the molecular formula and fine crystal structure of compounds. The heating device for crystal growth is an ordinary muffle furnace, and the heat sensing device is a platinum-rhodium thermocouple. Choose PbO and B 2 o 3 The mixture acts as a flux to spontaneously nucleate and grow crystalline PbTbB 7 o 13 . The raw material used for the crystal is B 2 o 3 , Pb 3 o 4 , Tb 4 o 7 . The specific operation steps are as follows: after weighing the above-mentioned raw materials according to a certain dose, mix and grind them with an agate mortar and mix them evenly, put them into a platinum crucible and compact them, and heat up to 930°C in a muffle furnace until the mixture is completely melted to form Uniform and transparent light yellow liquid. After constant temperature for 24 hours, cool d...

Embodiment 2

[0015] Embodiment 2: adopt high temperature solid-phase synthesis method synthetic compound PbTbB 7 o 13 The pure phase powder, the raw materials used are PbO, Tb 2 o 3 , B 2 o 3 . Its chemical reaction equation is: 2PbO + Tb 2 o3 +7B 2 o 3 → 2PbTbB 7 o 13 . The specific operation steps are as follows: After weighing the above-mentioned raw materials according to a certain proportion, carefully grind them in a mortar, mix them evenly, put them into a platinum crucible, put them into a muffle furnace, raise the temperature to 400°C, and pre-fire at a constant temperature for 10 hours. Then the crucible was taken out after cooling, poured out the sample, re-grinded evenly, put it into the platinum crucible again, calcined in the muffle furnace at 820°C for 40 hours, and turned off the power of the muffle furnace. After cooling, take out the crucible to obtain a white powder sample, which is the compound PbTbB 7 o 13 The pure powder was tested by powder X-ray diffr...

Embodiment 3

[0016] Example 3: PbTbB 7 o 13 The single crystal diffraction data of Bruker Apex2 CCD diffractometer, Mo-Kαradiation, λ = 0.71073 Å at room temperature with ω The scanning method is collected, the data is restored by SAINT, and the multi-scan method is used for absorption correction before being used for structural analysis. The single crystal structure analysis was completed on a PC computer through the SHELX-2014 program package. The coordinates of the heavy atoms Pb and Tb were determined by the direct method, and the coordinates of the other lighter atoms B and O were given by the difference Fourier synthesis method. For all Atomic coordinates and thermal anisotropy parameters are performed based on F 2 The full-matrix least squares plane refinement to convergence. Finally, the structure was checked by the PLATON program, and no type A crystallographic errors were detected.

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Abstract

The invention relates to a preparation method, performance and application of novel green light-emitting material terbium lead multi-borate. The novel green light-emitting material terbium lead multi-borate is characterized in that the molecular formula of the novel green light-emitting material terbium lead multi-borate is PbTbB7O13, the compound belongs to the monoclinic system, non-center space group is P21, and unit parameters are a=7.7676(8) angstrom, b=9.0824(10) angstrom and c=13.2535(14) angstrom. The compound comprises a BO3 plane triangle and a BO4 tetrahedron and is characterized in that the BO3 plane triangle and the BO4 tetrahedron are connected by sharing vertex oxygen atoms to form a complex two-dimensional anion framework network structure recorded as [B7O13]<5->8, and Pb<2+> and Tb<3+> are distributed in and among the anion layers of B7O13]<5->8 and connected with the anion layers through ionic bond action so as balance charge and support the framework. The PbTbB7O13 can emit bright green fluorescent light under near ultraviolet excitation and can be used as green fluorescent powder to be applied to the technical field of fluorescent light-emitting materials. The excitation spectrum of the PbTbB7O13 covers a wide waveband ranging from 330 nanometers to 380 nanometers, so that the PbTbB7O13 can be effectively excited by near ultraviolet and is suitable for being used as the fluorescent powder to be applied to near ultraviolet LED lighting devices.

Description

technical field [0001] The invention belongs to the technical field of rare earth luminescent materials, and in particular relates to the preparation, performance and application of a novel photoinduced green luminescent crystal material, terbium lead polyborate, and its application. Background technique [0002] The construction of ecological civilization is an important part of the "Thirteenth Five-Year Plan". my country proposes to peak carbon dioxide emissions around 2030 and strive to achieve it as soon as possible. In 2030, carbon dioxide emissions per unit of GDP will be reduced by 60%-65% compared with 2005. In order to achieve this goal, all walks of life in society need to take energy conservation and emission reduction as one of the primary development goals. According to statistics, the national lighting electricity consumption accounts for 7%-8% of the total electricity consumption. Therefore, lighting energy saving is the key to realizing An effective way to sa...

Claims

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Application Information

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IPC IPC(8): C30B29/16C30B9/12C09K11/78C01B35/18
CPCC01B35/128C01P2002/77C01P2002/80C09K11/7755C30B9/12C30B29/16
Inventor 赵丹汪舰张瑞娟马名杰张丽娜张磊李英杰阳虹
Owner HENAN POLYTECHNIC UNIV
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