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Long after-glow phosphorescent material and preparation method thereof

A technology of luminescent materials and phosphates, applied in luminescent materials, chemical instruments and methods, etc., to achieve the effects of low production cost, good stability and stable properties

Inactive Publication Date: 2012-02-01
佛山红狮陶瓷有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese invention patent 03109879.7 reports a Zn 3 (PO 4 ):Mn 2+ Type zinc phosphate long afterglow luminescent material and its preparation method, Chinese invention patent 200510119082.2 provides a kind of RMg2(PO 4 ) 2 (R=Ca, Sr or Ba) type alkaline earth phosphate long-lasting luminescent material and its preparation method, Chinese invention patent 200610033929.X reports a kind of MgZn 2 (PO 4 ) 2 :xMn 2+ , yM-type magnesium zinc phosphate red long-lasting luminescent material and its preparation method, but none of them involve phosphate-based long-lasting luminescent material activated by rare earth ions

Method used

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  • Long after-glow phosphorescent material and preparation method thereof
  • Long after-glow phosphorescent material and preparation method thereof
  • Long after-glow phosphorescent material and preparation method thereof

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preparation example Construction

[0025] A method for preparing a phosphate long-lasting luminescent material, characterized in that it includes the following steps: 1) Accurately weigh the carbonates, oxides or phosphates of the corresponding elements according to the stoichiometric ratio according to the composition of the above chemical formula Raw materials; 2) Mix and grind the raw materials in step 1) evenly, and directly calcinate at 800-1200°C for 2-12 hours in a reducing atmosphere, or pre-calcine at 300-800°C for 2-6 hours, and cool to room temperature. After re-grinding, calcining at 800-1200°C for 2-12 hours in a reducing atmosphere, cooling to room temperature naturally, and then grinding the resulting product to obtain the final product.

[0026] According to the above scheme, the preferred temperature for calcination of the raw materials is 950-1100°C.

[0027] According to the above scheme, the preferred time for the calcination of the raw materials is 3 to 6 hours.

[0028] According to the a...

Embodiment 1

[0031] Raw material is CaCO 3 (analytical pure), (NH 4 ) 2 HPO 4 (analytical pure), Eu 2 o 3 (99.99%) and Gd 2 o 3 (99.99%), the molar ratio between them is 2.91:2:0.015:0.03, accurately weigh each raw material and mix and grind evenly, put it in a crucible, put it into a high-temperature furnace, and put it in a 5% H 2 / 95%N 2 Calcined at 1100 °C for 4 hours in a reducing atmosphere, cooled naturally to room temperature, and ground to obtain a phosphate long-lasting luminescent material Ca 2.91 (PO 4 ) 2 : 0.03Eu 2+ , 0.06Gd 3+ , the main phase is Ca 3 (PO 4 ) 2 . Figure 1a and Figure 1b Excitation (a) and emission (b) spectra of the long-lasting luminescent materials provided in this example, respectively; figure 2 The afterglow decay curve of the long afterglow luminescent material provided in this embodiment.

Embodiment 2

[0033] The raw material is SrCO 3 (analytical pure), (NH 4 ) 2 HPO 4 (analytical pure), Eu 2 o 3 (99.99%) and Gd 2 o 3 (99.99%), the molar ratio between them is 2.91:2:0.015:0.03, accurately weigh each raw material and mix and grind evenly, put it in a crucible, put it into a high-temperature furnace, and put it in a 5% H 2 / 95%N 2 Calcined at 1100 °C for 4 hours in a reducing atmosphere, cooled naturally to room temperature, and ground to obtain the phosphate long-lasting luminescent material Sr 2.91 (PO 4 ) 2 : 0.03Eu 2+ , 0.06Gd 3+ , the main phase is Sr 3 (PO 4 ) 2 .

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Abstract

The invention discloses a long after-glow phosphorescent material and a preparation method thereof. The chemical formula of the long after-glow phosphorescent material is A3-x-y(PO4)2:xEu2+,yB, wherein A is one or more of alkaline earth metal ions of Ca2+, Sr2+ and Ba2+; B is one or more of Tb3+, Gd3+, Dy3+, Ce3+, Pr3+ and La3+; x is more than 0 and less than or equal to 0.3; and y is more than or equal to 0 and less than or equal to 0.3. The long after-glow phosphorescent material has stable performance, high waterproofness, moisture resistance and high-temperature resistance, and zero radioactivity and cannot harm human bodies and environment; moreover, the preparation method is simple, easy to implement, low in equipment requirement and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a luminescent material with a long afterglow luminescent effect and a preparation method thereof. Background technique [0002] Long afterglow luminescent material, commonly known as luminous powder, is a kind of photoluminescent material, which refers to the material that can continue to emit light for a long time after being irradiated by light sources such as sunlight and long-wave ultraviolet light for a short time, after the light source is turned off. As a kind of energy storage and energy-saving "green light source material", long-lasting luminescent materials have attracted more and more attention in today's energy shortage, especially in low-light lighting and display. At present, the products of long afterglow luminescent materials include luminescent coatings, paints, luminescent inks, luminescent glazes, luminescent plastics, luminescent rubb...

Claims

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Application Information

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IPC IPC(8): C09K11/71
Inventor 郭德兴张占辉黄志良万奇
Owner 佛山红狮陶瓷有限公司
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