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Process for preparing porous rare-earth luminescent material by freeze-drying method

A freeze-drying, rare earth luminescence technology, applied in luminescent materials, ceramic products, chemical instruments and methods, etc., can solve the problems of complex process, high energy consumption, rare earth luminescence porous materials have not been applied, etc. Simple, low-cost effects

Inactive Publication Date: 2015-04-08
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, rare earth luminescent porous materials have not been applied
The preparation of rare earth luminescent materials today mostly focuses on the preparation of powder phosphors, but the particle size of the powders is mostly in the micron scale, while the preparation of nanoscale rare earth phosphors requires higher energy consumption and more complicated processes

Method used

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  • Process for preparing porous rare-earth luminescent material by freeze-drying method
  • Process for preparing porous rare-earth luminescent material by freeze-drying method
  • Process for preparing porous rare-earth luminescent material by freeze-drying method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The porous silicon oxide prepared by a vacuum freeze-drying method is used as a supporting matrix, and the rare earth nitrate solution is used as an impregnating solution, and the porous rare earth luminescent composite material is prepared through a calcining process. Weigh 0.036g of polyvinyl alcohol and 0.036g of sodium dodecylsulfonate with a balance, dissolve them in 12ml of deionized water, then weigh 0.54g of nano-silicon dioxide, add it to the above-mentioned solution, and set it at room temperature at 100r / min Stir on a magnetic stirrer for 3 hours to obtain the required silicon oxide slurry; freeze the slurry in liquid nitrogen for 5 minutes until it is completely frozen into a solid state, and put it into the opened vacuum freeze-drying agent for 48 hours; freeze-dry The sample was placed in a resistance furnace and heated at 5°C / min to 1000°C for calcination, kept for 4 hours, and then automatically cooled to room temperature in the furnace to prepare porous ...

Embodiment 2

[0030] The porous silicon oxide prepared by a vacuum freeze-drying method is used as a supporting matrix, and the rare earth nitrate solution is used as an impregnating solution, and the porous rare earth luminescent composite material is prepared through a calcining process. Weigh 0.036g of polyvinyl alcohol and 0.036g of sodium dodecylsulfonate with a balance, dissolve them in 12ml of deionized water, then weigh 0.36g of nano-silicon dioxide, add it to the above-mentioned solution, and set it at room temperature at 100r / min Stir on a magnetic stirrer for 3 hours to obtain the required silicon oxide slurry; freeze the slurry in liquid nitrogen for 5 minutes until it is completely frozen into a solid state, and put it into the opened vacuum freeze-drying agent for 48 hours; freeze-dry The sample was placed in a resistance furnace and heated at 5°C / min to 1000°C for calcination, kept for 4 hours, and then automatically cooled to room temperature in the furnace to prepare porous ...

Embodiment 3

[0032]The porous silicon oxide prepared by a vacuum freeze-drying method is used as a supporting matrix, and the rare earth nitrate solution is used as an impregnating solution, and the porous rare earth luminescent composite material is prepared through a calcining process. Weigh 0.036g of polyvinyl alcohol and 0.036g of sodium dodecylsulfonate with a balance, dissolve them in 12ml of deionized water, then weigh 0.54g of nano-silicon dioxide, add it to the above-mentioned solution, and set it at room temperature at 100r / min Stir on a magnetic stirrer for 3 hours to obtain the required silicon oxide slurry; freeze the slurry in liquid nitrogen for 5 minutes until it is completely frozen into a solid state, and put it into the opened vacuum freeze-drying agent for 48 hours; freeze-dry The sample was placed in a resistance furnace and heated at 5°C / min to 1000°C for calcination, kept for 4 hours, and then automatically cooled to room temperature in the furnace to prepare porous s...

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Abstract

The invention relates to a process for preparing a porous rare-earth luminescent material by a freeze-drying method. The process comprises the following steps of: firstly, preparing solution from nanosized silica, sodium carboxymethylcellulose and sodium dodecyl sulfate and water, dipping the solution in liquid nitrogen so that the solution is frozen into solid state, conducting freeze-drying on the solid solution in vacuum and then calcining the same in a resistance furnace, thereby obtaining porous silicon oxide; preparing rare-earth mixed aqueous solution of yttrium nitrate and europium nitrate, steeping the prepared porous silicon oxide in the prepared rare-earth mixed aqueous solution for a while, and then performing freeze-drying in vacuum, thereby obtaining the finished product. The preparation method provided by the invention is low in cost, stable in preparation process, simple in operation and treatment and high in production efficiency; and the product is good in performance and high in porosity.

Description

technical field [0001] The invention relates to a method for preparing an inorganic non-metallic material, in particular to a method for preparing a porous material based on a freeze-drying method and loading rare earth elements. Background technique [0002] Rare earth is known as the "gold" of industry. Because of its excellent optical, electromagnetic and other physical properties, it can be combined with other materials to form a wide variety of new materials with different properties. Its most notable function is to greatly improve the quality and performance of other products. . Today's international competition for rare earth elements is intensifying, and rare earth elements will occupy an immeasurably low position in the development of future science and technology. How to effectively utilize the efficiency of rare earth elements will be a major problem facing us today. Yttrium oxide and europium oxide, as a kind of rare earth elements, can emit monochromatic red li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/79C04B38/00
Inventor 钱磊魏玉磊范润华史志成燕克兰孙凯李乾乾
Owner SHANDONG UNIV
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