Method for preparing red long-afterglow luminescent powder

A long afterglow luminescent powder and red technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of not being widely used, limited excitation light source, poor chemical stability, etc., achieve long afterglow time, low production cost, The effect of short light absorption time

Active Publication Date: 2014-08-06
潍坊大耀新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned various red long-lasting luminescent powders cannot be widely used due to factors such as poor chemical stability, limited excitation light sources, short afterglow time, and high production costs.

Method used

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  • Method for preparing red long-afterglow luminescent powder
  • Method for preparing red long-afterglow luminescent powder
  • Method for preparing red long-afterglow luminescent powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1, A preparation method of red long afterglow luminescent powder includes the following steps:

[0030] ⑴ Add 100kg of zinc sulfide, 10kg of titanium dioxide, 1200mL of potassium chloride aqueous solution with a concentration of 80g / 1000mL, 500g calcium chloride, 1000mL of potassium permanganate aqueous solution with a concentration of 300g / 1000mL in the ball mill mixer, with a concentration of 5g / 1000mL 100mL europium nitrate aqueous solution, 5000g thiourea, and the concentration of 30g / 1000mL In 2 (SO 4 ) 3 120mL aqueous solution, mixing for 20 hours;

[0031] (2) Put the uniformly mixed raw materials in the above step (1) into a quartz crucible, cover and seal, and put it into a high-temperature furnace, pass N 2 Heat up to 1500℃ and keep for 4 hours. After keeping the temperature, lower to 700℃ and get out of the furnace, and stop N 2 gas;

[0032] (3) Take out the material block cooled to room temperature in the above step (2), remove the non-luminous matter unde...

Embodiment 2

[0034] Example 2, A preparation method of red long afterglow luminescent powder includes the following steps:

[0035] ⑴ Add 120kg of zinc sulfide; 10kg of titanium dioxide; 1800mL of potassium chloride aqueous solution with a concentration of 100g / 1000mL; 800g calcium chloride; 1500mL of potassium permanganate aqueous solution with a concentration of 500g / 1000mL; concentration of 8g / 1000mL 80mL europium nitrate aqueous solution, 4000g thiourea, 50g / 1000mL In 2 (SO 4 ) 3 200mL aqueous solution, mixing for 15 hours;

[0036] ⑵The uniformly mixed raw materials are put into a quartz crucible, sealed with a cover, and put into a high-temperature furnace. 2 Heat up to 1800℃ and keep for 5 hours. After the heat preservation is over, lower to 800℃ and get out the material block, and stop N 2 gas;

[0037] (3) Take out the material block cooled to room temperature, remove the non-luminous matter under the purple light, add 10% NH volume fraction per kilogram of material block 4 500mL of OH ...

Embodiment 3

[0039] Example 3, A preparation method of red long afterglow luminescent powder includes the following steps:

[0040] ⑴Add 150kg of zinc sulfide; 20kg of titanium dioxide; 1800mL of potassium chloride aqueous solution with a concentration of 80g / 1000mL; 800g calcium chloride; 1500mL of potassium permanganate aqueous solution with a concentration of 500g / 1000mL; concentration of 10g / 1000mL 100mL europium nitrate aqueous solution, 3000g thiourea, 50g / 1000mL In 2 (SO 4 ) 3 200mL aqueous solution, mixing for 18 hours;

[0041] ⑵The uniformly mixed raw materials are put into a quartz crucible, sealed with a cover, and put into a high-temperature furnace. 2 Heat up to 1500℃ and keep for 5 hours. After the heat preservation is over, lower to 800℃ to get out the material block, and stop N 2 gas;

[0042] (3) Take out the material block cooled to room temperature, remove the non-luminous matter under the purple light, add 10% NH volume fraction per kilogram of material block 4 800mL of OH s...

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Abstract

The present invention relates to a preparation method of red long afterglow luminescent powder, comprising uniformly mixing zinc sulfide, titanium dioxide, potassium chloride aqueous solution, potassium permanganate aqueous solution, europium nitrate aqueous solution, calcium chloride, indium sulfate aqueous solution and thiourea; Put it into the heating furnace, feed nitrogen gas, heat up and keep warm, after the heat preservation is over, take it out of the furnace at 700°C-800°C to get the material block, and cool it; remove the non-luminous matter under the purple light, add ammonia water to static bubble, and wash with water; the powder obtained after drying The powder is sieved, and the particle size can be selected according to the particle size requirements of the powder to obtain zinc sulfide titanium red long-lasting luminescent powder. The luminescent powder is not limited by the excitation light source, and absorbs light quickly and for a short time. It can reach saturation after irradiating with 1000lx illuminance for 5 minutes. , long afterglow time, high initial brightness, uniform particles, low production cost, good water resistance, insoluble in water, non-toxic and non-radioactive, and does not turn black when rubbed with metal.

Description

technical field [0001] The invention relates to a preparation method of luminescent powder, in particular to a preparation method of red long afterglow luminescent powder, which belongs to the technical field of luminescent powder. Background technique [0002] Luminescent powder, also known as luminescent powder, is a long afterglow luminescent material, referred to as long afterglow material storage powder, also known as luminous material luminescent material. This type of material has structural defects or impurity defects in the crystal lattice formed during the synthesis process and has luminescence properties. The luminescence caused by material lattice defects is called self-excited luminescence, and the luminescence caused by impurity defects is called activated luminescence. [0003] Red long-lasting luminescent powder has special optical properties, which make it widely used in many fields. Therefore, researchers from various countries have carried out a lot of re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/67
Inventor 王强王宗耀
Owner 潍坊大耀新材料有限公司
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