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Low-temperature synthesis method of molybdate fluorescent powder

A synthesis method and fluorescent powder technology, applied in chemical instruments and methods, luminescent materials, etc.

Inactive Publication Date: 2017-05-31
NORTHEAST DIANLI UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the synthesis method of the existing molybdate fluorescent powder requires relatively high synthesis temperature, the synthesis temperature is above 700°C, and some even reach 900°C. In order to reduce the cost and improve the luminous performance, the present invention provides a molybdate Low-temperature Synthesis Method of Phosphor Powder

Method used

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Embodiment

[0049] A method for synthesizing molybdate fluorescent powder at low temperature, comprising the following steps: accurately weighing SrCO3, H2MoO4, Eu2O3 and a certain amount of NH4F, NaF, H3BO3, BaF2, NH4Cl, Li2CO3, Na2CO3 and K2CO3 are used as starting materials, add a small amount of absolute ethanol, and grind for 35-45 minutes in an agate mortar washed with deionized water to fully mix the raw materials, transfer the evenly ground medicine to a crucible and place it in a muffle furnace Calcined in the furnace, after the sample is cooled to room temperature with the furnace, grind it evenly in the agate mortar again.

[0050] Following is the composition of each raw material among the embodiment 1-9:

[0051] The weight percent of each raw material in the sample of Table 1 Example 1-9 (wherein the main material is SrCO3, H2MoO4 and Eu2O3):

[0052]

[0053] Raw material mol SrCO 3

h 2 MoO 4

Eu 2 o 3

Example 1 0.7 1 0.3 Exam...

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Abstract

The invention discloses a low-temperature synthesis method of molybdate fluorescent powder. The low-temperature synthesis method comprises the following steps: adopting a high-temperature solid-phase method and accurately weighing SrCO3, H2MoO4 and Eu2O3 as starting raw materials according to a stoichiometric ratio; selectively adding a certain amount of NH4F, NaF, H3BO3, BaF2, NH4Cl, Li2CO3, Na2CO3 and K2CO3; calcining in a muffle furnace to obtain the molybdate fluorescent powder. Optimized substance ratio and preparation conditions are obtained through carrying out phase analysis, researching luminous properties and specifically analyzing an energy transfer mechanism, cooling effect of a fluxing agent, influences on the luminous properties, influences, caused by a charge compensating agent, on the luminous properties of the fluorescent powder, and color coordinates. By adopting the method provided by the invention, the energy consumption is reduced and the luminous properties of a product are improved.

Description

technical field [0001] The invention relates to the technical field of fluorescent material preparation methods, in particular to a low-temperature synthesis method of molybdate fluorescent powder. Background technique [0002] Phosphor powder (commonly known as luminous powder) is usually divided into two types: photo-induced energy storage luminous powder and radioactive luminous powder. Photo-energy storage luminous powder is a fluorescent powder that stores light energy after being irradiated by natural light, daylight, ultraviolet light, etc., and then slowly releases it in the form of fluorescence after stopping the light irradiation, so it can be used at night or in dark places. , can still see the luminescence, which lasts for several hours to more than ten hours. [0003] At present, the red luminescence of the most important inorganic materials is realized through the activation of Eu3+. The commercial red phosphor used in W-LED is mainly Y2O2S: Eu3. The red phosp...

Claims

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Application Information

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IPC IPC(8): C09K11/68
CPCC09K11/7736
Inventor 于海辉梁策乔润赵明悦孔丽
Owner NORTHEAST DIANLI UNIVERSITY
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