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Holmium metal iodate fluorescent material and preparation method and applications thereof

A technology of fluorescent materials and iodates, applied in luminescent materials, rare earth metal compounds, chemical instruments and methods, etc., can solve problems such as weak light absorption ability, and achieve the effects of low production cost, high luminous intensity, and high particle purity

Inactive Publication Date: 2013-04-03
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the f—f configuration transition of rare earth metals is forbidden by spectral selectivity, the light absorption ability is weak, and the molar absorption coefficient is usually less than 1 M-1cm-1, Therefore, it is almost impossible to directly excite rare earth metals to cause them to emit light.

Method used

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Examples

Experimental program
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preparation example Construction

[0019] 1. Preparation of iodate

[0020] Weigh holmium trioxide (Ho 2 o 3 ) 0.378g, iodine pentoxide (I 2 o 5 )0.033~3.340g, measure water (H 2 O) 1.8 ~ 9.0ml, the molar ratio is 1:0.1 ~ 50: 10 ~ 50, put it into a closed 28 mL reaction kettle, raise the temperature to 150 ~ 200 ℃, keep the temperature for 0.5 ~ 10 days, and take it out with 1 ~ 20 Naturally cooling under the condition of Celsius / min, Ho (IO 3 ) 3 crystals.

[0021] Holmium trioxide (Ho 2 o 3 ) is replaced by holmium nitrate, holmium chloride, holmium sulfate or holmium acetate of the same substance, and the same iodate fluorescent material can be obtained.

[0022] Iodine pentoxide (I 2 o 5 ) by the same amount of sodium iodate (NaIO 3 ) or potassium iodate (KIO 3 ) substitution can get the same iodate fluorescent material.

example

[0023] Concrete reactant implementation example is as follows:

[0024] (1) Holmium trioxide (Ho 2 o 3 ): iodine pentoxide (I 2 o 5 ): water (H 2 O) = 1:50:10.

[0025] (2) Holmium trioxide (Ho 2 o 3 ): iodine pentoxide (I 2 o 5 ): water (H 2 O) = 1:50:50.

[0026] (3) Holmium trioxide (Ho 2 o 3 ): iodine pentoxide (I 2 o 5 ): water (H 2 O) = 1:0.1:10.

[0027] (4) Holmium trioxide (Ho 2 o 3 ): iodine pentoxide (I 2 o 5 ): water (H 2 O) = 1:0.1:50.

[0028] (5) Holmium nitrate: sodium iodate (NaIO 3 ): water (H 2 O) = 1:20:20.

[0029] (6) Holmium chloride: sodium iodate (NaIO 3 ): water (H 2 O) = 1:30:30.

[0030] (7) Holmium sulfate: Potassium iodate (KIO 3 ): water (H 2 O) = 1:10:40.

[0031] (8) Holmium acetate: Potassium iodate (KIO 3 ): water (H 2 O) = 1:40:50.

[0032] 2. Fluorescence test

[0033] The prepared crystal was ground evenly to obtain a solid powder, and the fluorescence luminescence performance test was carried out on a Flu...

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PUM

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Abstract

The invention discloses a holmium metal iodate fluorescent material and a preparation method and applications thereof. The molecular formula of the compound is Ho(IO3)3, the space group is P21n, the parameters of unit cells comprise that a is equal to 8.7376 angstrom, b is equal to 5.9706 angstrom, c is equal to 15.0677 angstrom, alpha is equal to 90.000, beta is equal to 97.240, g is equal to 90.000, and Z is equal to 2; and the volume V of the unit cells is equal to 779.8(10) angstrom<3>. The material adopts hydrothermal reaction to obtain crystals; Ho<3+> fluorescence radiation intensity of the material can be enhanced through iodate ions; and the material is used for producing fluorescence radiation devices.

Description

technical field [0001] The invention relates to a holmium metal iodate fluorescent material, a preparation method and application thereof. Background technique [0002] Due to the unique 4f electronic structure of rare earth metals, it has a large atomic radius and atomic magnetic moment, strong spin-orbit coupling, abundant electronic energy levels, and because of its flexible coordination number, it can form Complexes with diverse structures. Rare earth metals play an important role in functional materials such as luminescent materials, magnetic materials, catalytic materials, magneto-optical storage materials, and hydrogen storage materials, especially rare earth luminescent materials. Ho 3+ The luminescence is also one of the rare earth ions that have been studied more at present, including Ho 3+ The compound may have properties such as photoexcitation, photoluminescence and thermoluminescence, and can be used in high-density optical disk storage and detection element...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00C09K11/61
Inventor 潘春阳卢静陈武洲罗小杏张汉辉陈桡莹崔倩文
Owner GUANGDONG UNIV OF TECH
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