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High-brightness yellowish green luminescent powder and its preparation method

A technology of luminescent powder and high brightness, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of high production cost, difficult to crush, poor appearance and color, etc., and achieve the effect of reducing production cost and improving product quality.

Inactive Publication Date: 2013-01-16
山东燎原发光科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] An object of the present invention is to solve the above-mentioned disadvantages of low brightness, poor afterglow, and poor appearance color in the prior art. At the same time, the product has high hardness and is not easy to be crushed, resulting in excessively high production costs, thereby restricting the promotion and application of the product. A simple and efficient high-brightness yellow-green luminescent powder and its preparation method

Method used

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  • High-brightness yellowish green luminescent powder and its preparation method
  • High-brightness yellowish green luminescent powder and its preparation method
  • High-brightness yellowish green luminescent powder and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Aluminum oxide: 35 kg, strontium carbonate: 54.58 kg, ammonium bicarbonate: 6.7 kg, ammonium borate: 0.8 kg, europium oxide: 1.04 kg, dysprosium oxide: 1.88 kg.

[0036] The firing process is as follows: 1400°C, heating and holding for 15 hours.

[0037] Mixing process: first accurately weigh the strontium carbonate in the main ingredient M and the alumina in A according to the provided ratio, put them into the mixer in turn, and pre-mix for 30 minutes. Then accurately weigh the ammonium bicarbonate and ammonium borate in O according to the provided ratio; the europium oxide and dysprosium oxide in R are all added to the mixer, and the mixing time is 30 minutes, and the total mixing time is not less than 1 Hours to ensure that the various materials are mixed evenly;

[0038] Firing process: Put uniformly mixed raw materials into a sagger, push the finished product into a high-temperature kiln, and use hydrogen to reduce the protective atmosphere. In order to ensure pro...

Embodiment 2-7

[0042] Prescription is as follows table, all the other are with embodiment 1.

[0043]

[0044]

Embodiment 8-15

[0046] Prescription is as follows table, all the other are with embodiment 1.

[0047]

[0048]

[0049]

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Abstract

The invention relates to the luminescent powder field, and relates to a high-brightness yellowish green luminescent powder and its preparation method. The general chemical formula of the powder is MaAbOcRd, wherein M is an alkaline earth oxide selected from strontium oxide, magnesium oxide, barium oxide and calcium oxide; A is selected from boron oxide, alumina, gallium oxide, scandium oxide and indium oxide; O is selected from ammonium citrate, ammonium bicarbonate, urea, glucose and ammonium oxalate; R is selected from europium oxide, yttrium oxide, neodymium oxide, dysprosium oxide and praseodymium oxide; a, b, c and d are molar coefficients of all raw materials; a is 0.3-0.5; b is 0.3-0.4; c is 0.02-0.07; and d is 0.0002-0.0006. Products prepared through the above formula and the method in the invention have the advantages of high brightness, good afterglow, glossy and bright color, easy crushing and difficult hardening, and the method has the advantages of simplicity, scientificity and reasonableness, and low production cost, so the method is suitable for popularization and application.

Description

technical field [0001] The invention relates to the field of medicine preparation, and relates to a high-brightness yellow-green luminescent powder and a preparation method thereof. Background technique [0002] At present, the traditional yellow-green luminescent powders are all made of inorganic aluminosilicate materials, rare earth activation materials, adding fluxing agents and other inorganic materials through high-temperature solid-state reaction. Compared with the first-generation zinc sulfide luminescent products, the products produced by this process have greatly improved in product quality and luminous brightness, but they still generally have disadvantages such as low brightness, poor afterglow, and poor appearance color. At the same time, the product has high hardness. Difficult to crush, resulting in high production costs, thereby restricting the promotion and application of the product. [0003] For example, a yellow-green luminescent powder in the prior art i...

Claims

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Application Information

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IPC IPC(8): C09K11/64C09K11/63C09K11/62C09K11/55
Inventor 叶成民王静乔昱华
Owner 山东燎原发光科技有限公司