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Lead-free ferroelectric photochromic material based on rare earth doping and preparation method and application thereof

An electro-optical and ferroelectric technology, applied in the application of photochromic materials, the field of preparation of ferroelectric photochromic materials, can solve problems such as difficult real-time control of materials, and achieve low cost, good physical and chemical stability, anti- Good effect on fatigue

Active Publication Date: 2018-05-11
东营睿港投资服务有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The currently reported ferroelectric photochromic materials mainly include Na 0.5 Bi 2.5 Nb 2 o 9 (ACSAppl.Mater.Interfaces 2016,8,4789-4794), but the recovery of photochromic change of such materials can only be achieved by heating, and the heating of materials is not easy to achieve real-time regulation of material luminescence

Method used

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  • Lead-free ferroelectric photochromic material based on rare earth doping and preparation method and application thereof
  • Lead-free ferroelectric photochromic material based on rare earth doping and preparation method and application thereof
  • Lead-free ferroelectric photochromic material based on rare earth doping and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Using 99.8% pure Na 2 CO 3 , 99.8% Na 2 CO 3 , 99.8% TiO 2 , 99.9% Er 2 o 3 and 99.9% Yb 2 o 3 As a raw material, according to the chemical formula (K 0.5 Na 0.5 ) 0.998-x Er 0.002 Yb x NbO 3(x=0.002, 0.004, 0.006, 0.008) are weighed separately, put into a ball mill tank and mixed for ball milling, ball milling conditions: the volume ratio of raw materials, agate ball volume, and ball milling medium absolute ethanol is approximately equal to 1:1 : 1.5, it was ball milled for 8 hours, and the raw material after ball milling was put into an oven and baked at 80° C. for 4 hours. Afterwards, the dried raw material is pressed into a raw material body with a diameter of 40mm by a tablet machine at 100Mpa, and then the pressed body is put into a KBF1400 box furnace for pre-firing, and the pre-firing condition is 600°C for 3 hours. Decompose the binder, then keep the temperature at 1050°C for 4 hours, crush the pre-fired block sample, grind it into powder, sieve i...

Embodiment 2

[0024] Using 99.8% pure Na 2 CO 3 , 99.8% Na 2 CO 3 , 99.8% TiO 2 , 99.9% Er 2 o 3 and 99.9% Yb 2 o 3 As raw material, according to the chemical formula (K 0.5 Na 0.5 ) 0.998-x Er 0.002 Yb x NbO 3 (x=0.002, 0.004, 0.006, 0.008) are weighed separately, put into a ball mill tank and mixed for ball milling, ball milling conditions: the volume ratio of raw material, agate ball volume, and ball milling medium absolute ethanol is approximately equal to 1:1.2 : 1, it was ball milled for 10 hours, and the raw material after ball milling was put into an oven and baked at 80° C. for 3 hours. After that, the dried raw materials are pressed into a raw material body with a diameter of 40mm by a tablet machine at 200Mpa, and then the pressed body is put into a KBF1400 box furnace for pre-burning, and the pre-fired condition is 700°C for 0.5 hours. Decompose the binder, then keep the temperature at 1200°C for 2 hours, crush the pre-fired block sample, grind it into powder, siev...

Embodiment 3

[0026] Using 99.8% pure Na 2 CO 3 , 99.8% Na 2 CO 3 , 99.8% TiO 2 , 99.9% Er 2 o 3 and 99.9% Yb 2 o 3 As raw material, according to the chemical formula (K 0.5 Na 0.5 ) 0.998-x Er 0.002 Yb x NbO 3 (x=0.002, 0.004, 0.006, 0.008) are weighed separately, put into a ball mill tank and mixed for ball milling, ball milling conditions: the volume ratio of raw material, agate ball volume, and ball milling medium anhydrous ethanol is approximately equal to 1:1.1 : 1.3, it was ball milled for 5 hours, and the raw material after ball milling was put into an oven and baked at 80° C. for 3 hours. After that, the dried raw materials are pressed into a raw material body with a diameter of 40mm by a tablet machine at 200Mpa, and then the pressed body is put into a KBF1400 box furnace for pre-burning, and the pre-fired condition is 700°C for 0.5 hours. Decompose the binder, then keep the temperature at 1200°C for 2 hours, crush the pre-fired block sample, grind it into powder, si...

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Abstract

The invention relates to a lead-free ferroelectric photochromic material. The material includes a lead-free ferroelectric ceramic material, wherein (K0.5Na0.5)NbO3 is as a matrix of the lead-free ferroelectric ceramic material, the material is characterized in that a chemical formula of the lead-free ferroelectric ceramic material is (K0.5Na0.5)0.998-xEr0.002YbxNbO3, wherein x is greater than 0.002 or equal to 0.002 and less than 0.008 or equal to 0.008, by adding rare earth element sensitizer Yb3+ at an A site and activating Er3 with rare earth element, K+ and N+ ions are replaced, and then up-conversion luminescence of the material is achieved. Compared with the prior art, the lead-free ferroelectric photochromic material has the advantages that the cost of raw materials for preparationof the matrix material is lower, the anti-fatigue performance of discoloration is good, the color change degree of inorganic photochromic material can be efficiently adjusted by the codoping of rare earth element so as to meet the needs of different applications.

Description

technical field [0001] The invention relates to a ferroelectric photochromic material, and also discloses a preparation method of the ferroelectric photochromic material and an application in the photochromic material. Background technique [0002] Photochromic materials refer to a class of materials that can change color after being excited by a light source. Traditional photochromic materials mainly include tungsten oxide, bromide and some organic compounds. Traditional photochromic materials mainly use the phase transition of the light irradiation material to change, thereby changing the color. Sodium Potassium Niobate (K 0.5 Na 0.5 )NbO 3 Ceramic materials have excellent piezoelectric, ferroelectric, dielectric, electro-optic and other electrical properties, and are a superior lead-free ferroelectric material. [0003] Recently, there are more and more applications and researches on the preparation of up-conversion luminescent materials by using lead-free ferroelect...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/626C09K11/78
CPCC04B35/495C04B35/62615C04B2235/3201C04B2235/3224C04B2235/442C04B2235/9646C09K11/7769
Inventor 罗来慧章园园
Owner 东营睿港投资服务有限责任公司
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