Method for low temperature synthesis of zinc magnesium silicate green florescent powder of regular particle shape

A green phosphor, zinc manganese silicate technology, applied in chemical instruments and methods, luminescent materials, etc., to achieve the effects of simple process steps, low sintering temperature, and regular product particle shape

Inactive Publication Date: 2007-08-01
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the above-mentioned zinc manganese silicate green phosphor preparation method, and provide a low-temperature synthesis of zinc manganese silicate green phosphor with simple process, low sintering temperature and regular product particle shape. method

Method used

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  • Method for low temperature synthesis of zinc magnesium silicate green florescent powder of regular particle shape
  • Method for low temperature synthesis of zinc magnesium silicate green florescent powder of regular particle shape
  • Method for low temperature synthesis of zinc magnesium silicate green florescent powder of regular particle shape

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Embodiment 1

[0036] With the general formula for synthesis (Zn 1-x mn x ) 2 SiO 4 The expressed zinc manganese silicate product 10g is example, and x represents the atomic number of Mn element in the formula, and x is 0.02, and the synthetic method used comprises the following steps:

[0037] 1. Preparation of amorphous silica gel

[0038] According to the general formula (Zn 1-x mn x ) 2 SiO 4 Weigh 9.38g (10.08mL) of tetraethyl orthosilicate, 10.08mL of deionized water, and 40.3mL of absolute ethanol, mix them, stir at 60-80°C for 1-2 hours to prepare a mixed solution, and use ammonia water with a weight concentration of 30% Prepare a pH adjusting solution with ethanol at a volume ratio of 1:5, adjust the pH of the mixed solution to 9-11, put it in an oven, bake at 80-100°C for 2-5 hours, and prepare an amorphous silica gel .

[0039] 2. Ingredients

[0040] According to the general formula (Zn 1-x mn x ) 2 SiO 4 Weigh 7.15 g of zinc oxide, 0.21 g of manganese carbonate, an...

Embodiment 2

[0048] With the general formula for synthesis (Zn 1-x mn x ) 2 SiO 4 The expressed zinc manganese silicate product 10g is an example, and x represents the atomic number of Mn element in the formula, and x is 0.02, and used raw material and synthetic method thereof comprise the following steps:

[0049] In this embodiment, the raw materials used are tetraethyl orthosilicate, zinc oxide, and manganese carbonate, and the amount of the raw materials is the same as in Example 1. The flux used is calcium fluoride, and the amount of calcium fluoride is 0.1 g. In step 3 of the sintering process, the sintering mixture is put into a crucible, placed in a high-temperature furnace, sintered at 1200° C. for 2 hours, and cooled naturally to room temperature. Other processing steps are identical with embodiment 1.

Embodiment 3

[0051] With the general formula for synthesis (Zn 1-x mn x ) 2 SiO 4 The expressed zinc manganese silicate product 10g is an example, and x represents the atomic number of Mn element in the formula, and x is 0.02, and used raw material and synthetic method thereof comprise the following steps:

[0052] In this embodiment, the raw materials used are tetraethyl orthosilicate, zinc oxide, and manganese carbonate, and the amount of raw materials is the same as in Example 1. The flux used is calcium fluoride, and the amount of calcium fluoride is 0.15 g. In step 3 of the sintering process, the sintering mixture is put into a crucible, placed in a high-temperature furnace, sintered at 1100° C. for 3 hours, and cooled naturally to room temperature. Other processing steps are identical with embodiment 1.

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Abstract

The invention relates to a method for synthesizing regular manganese- zinc silicate green emitting phosphor at low temperature. It comprises preparing morphous silicon dioxide gel, batching, calcinating, and preparing manganese- zinc silicate green emitting phosphor. The invention hydrolyzes ethyl orthosilicate and prepares morphous silicon dioxide gel, which is used as one of raw material for calcination, mixes with zinc- containing, manganese- containing raw material and fluxing agent, calcinates at 1000- 1200 Deg. C for 2- 4 hours and getting final product. The invention is characterized by simple operation, low calcination temperature, and regular product paticle shape.

Description

technical field [0001] The invention belongs to the technical field of fluorescent powder preparation, and in particular relates to a low-temperature synthesis method of zinc-manganese silicate green fluorescent powder with regular particle shapes. Background technique [0002] The research on zinc manganese silicate green phosphor has a history of many years. As early as 1938, zinc-manganese silicate was used in fluorescent lamps as a green phosphor component, and was later used in photometric calibration standard phosphors and cathode ray tube display devices. Since the 1960s, flat panel display technology has developed rapidly. Zinc manganese silicate green phosphor has been applied in plasma flat panel displays due to its high luminous intensity, good color purity, and stable performance. [0003] At present, the main synthesis methods of zinc-manganese silicate green phosphor include high-temperature solid-phase method, sol-gel method, combustion method, etc. The sol-g...

Claims

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Application Information

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IPC IPC(8): C09K11/67
Inventor 焦桓张娜荆西平
Owner SHAANXI NORMAL UNIV
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