Preparation method of Ca-alpha-SiAlON:Eu<2+> fluorescent nanoribbon fiber

A fluorescent nano-fiber technology is applied in the field of preparation of fluorescent nano-belt fibers, and achieves the effects of low nitridation temperature, good application prospect and simple method

Active Publication Date: 2015-01-14
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to control the morphology of oxynitride phosphors and prepare fluorescent nanoribbon fibers is still a major challenge.

Method used

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  • Preparation method of Ca-alpha-SiAlON:Eu&lt;2+&gt; fluorescent nanoribbon fiber
  • Preparation method of Ca-alpha-SiAlON:Eu&lt;2+&gt; fluorescent nanoribbon fiber
  • Preparation method of Ca-alpha-SiAlON:Eu&lt;2+&gt; fluorescent nanoribbon fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 3.4mmol calcium nitrate, 11.34mmol aluminum nitrate and 0.56mmol europium nitrate were dissolved in alcohol-water mixed solvent (V 醇 / V 水 =8:2). Add 2.5ml tetraethyl orthosilicate dropwise into the above solution under stirring, and add 2.0g polyvinyl butyral (M w =170000) to adjust the viscosity of the solution, continue stirring for 1 h, and finally obtain a uniform and transparent spinning solution. Put the prepared spinning solution into the syringe and put it into the peristaltic pump. Connect the needle to the anode of the high-voltage generator, use aluminum foil as the receiving device, connect to the cathode, the voltage is 10kv, the distance between the spinning needle and the receiving aluminum foil is 15cm, the propulsion speed of the peristaltic pump is 10μl / min, and the relative humidity is controlled at 10%. . After 8 hours of electrospinning, a uniform layer of white fibers was collected on the receiving aluminum foil. The fibers obtained by electro...

Embodiment 2

[0026] Dissolve 1.7mmol calcium nitrate, 5.67mmol aluminum nitrate and 0.28mmol europium nitrate in 40ml alcohol-water mixed solvent (V 醇 / V 水 =7:1). Add 4.8ml tetraethyl orthosilicate dropwise to the above solution under stirring, and add 1.6g polyvinyl butyral (M w =250000) to adjust the viscosity of the solution, continue stirring for 1 h, and finally obtain a uniform and transparent spinning solution. Put the prepared spinning solution into the syringe and put it into the peristaltic pump. Connect the needle to the anode of the high-voltage generator, use aluminum foil as the receiving device, connect to the cathode, the voltage is 9KV, the distance between the spinning needle and the receiving aluminum foil is 18cm, the propulsion speed of the peristaltic pump is 8μl / min, and the relative humidity is controlled at 12%. . After 8 hours of electrospinning, a uniform layer of white fibers was collected on the receiving aluminum foil. The fibers obtained by electrospinni...

Embodiment 3

[0028] Dissolve 0.9mmol calcium nitrate, 2.7mmol aluminum nitrate and 0.15mmol europium nitrate in alcohol-water mixed solvent (V 醇 / V 水 =7:1). Add 2.5ml tetraethyl orthosilicate dropwise into the above solution under stirring, and add 2.0g polyvinyl butyral (M w=170000) to adjust the viscosity of the solution, continue stirring for 1 h, and finally obtain a uniform and transparent spinning solution. Put the prepared spinning solution into the syringe and put it into the peristaltic pump. Connect the needle to the anode of the high-voltage generator, use aluminum foil as the receiving device, and connect to the cathode, the voltage is 10KV, the distance between the spinning needle and the receiving aluminum foil is 15cm, the propulsion speed of the peristaltic pump is 8μl / min, and the relative humidity is controlled at 10%. . After 8 hours of electrospinning, a uniform layer of white fibers was collected on the receiving aluminum foil. The fibers obtained by electrospinni...

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Abstract

The invention relates to a preparation method of a Ca-alpha-SiAlON:Eu<2+> fluorescent nanoribbon fiber. The preparation method comprises the following steps: (1) dissolving calcium nitrate, calcium nitrate and aluminum nitrate in an alcohol-water mixed solvent, adding tetraethyl orthosilicate while stirring, adding polyvinyl butyral after stirring, and stirring continuously to obtain a spinning solution; (2) sucking the spinning solution into a needle cylinder, carrying out electrostatic spinning and collecting fibers on an accepted aluminum foil; and (3) putting white fibers in a high-temperature tubular atmosphere furnace for heat treatment, reducing the temperature along with the temperature reduction of the furnace to obtain the Ca-alpha-SiAlON:Eu<2+> fluorescent nanoribbon fiber. The method is simple, low in nitridation temperature and short in time, and obtained Ca-alpha-SiAlON:Eu<2+> fluorescent powder keeps the good fiber morphology, is beneficial to improving the luminescence property and the later encapsulation in LEDs, and the Ca-alpha-SiAlON:Eu<2+> fluorescent nanoribbon fiber has the good application prospect.

Description

technical field [0001] The invention belongs to the field of preparation of fluorescent nanoribbon fibers, and specially designs a Ca-α-SiAlON:Eu 2+ Preparation method of fluorescent nanoribbon fiber. Background technique [0002] In 1997, Japan’s Nichia Corporation used blue LED chips and yellow YAG:Ce phosphors to synthesize the first white LED, which opened the era of semiconductor lighting, and then set off a wave of white LED research all over the world. [0003] Photoluminescent materials, that is, the technology of fluorescent materials is one of the key technologies in white LEDs, which directly determines the color temperature, color rendering index, luminous efficiency and service life of white LED lighting devices. The currently widely used YAG:Ce phosphor has low color rendering index, poor thermal stability, and high color temperature due to the limitation of the oxide matrix, so it is difficult to meet the growing demand in the lighting field. In order to sol...

Claims

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Application Information

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IPC IPC(8): D01F9/08C09K11/64
Inventor 王宏志赵海雷李耀刚张青红
Owner DONGHUA UNIV
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