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Lead-free ferroelectric upconversion fluorescent ceramic material as well as preparation method and application thereof

A fluorescent ceramic and ferroelectric technology, applied in the field of up-conversion luminescent materials, can solve the problems of complex preparation process, fluoride toxicity, low chemical and physical stability, and achieve the effect of expanding the application range and improving leakage

Active Publication Date: 2015-06-17
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned up-conversion luminescent materials have low chemical and physical stability problems, and the electrical properties need to be further improved. At the same time, the preparation process is complicated, and fluoride is toxic.

Method used

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  • Lead-free ferroelectric upconversion fluorescent ceramic material as well as preparation method and application thereof
  • Lead-free ferroelectric upconversion fluorescent ceramic material as well as preparation method and application thereof
  • Lead-free ferroelectric upconversion fluorescent ceramic material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1, adopts the Na of purity 99.8% 2 CO 3 , 99.9% Bi 2 o 3 ,99.8% TiO 2 , 99.9% of Pr 2 o 3 and 99.9% Yb 2 o 3 As raw material, according to the chemical formula Bi 0.48-y Na 0.5 Yb 0.02 PR y TiO 3 (y=0.0003, 0.0005, 0.001, 0.0015) 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 anhydrous ethanol is approximately equal to 1:1 : 1.5, it was ball milled for 12 hours, and the raw material after ball milling was put into an oven and baked at 80° C. for 4 hours. Afterwards, use a tablet machine to press the dried raw materials into raw material embryos with a diameter of 40 mm, and then put the pressed embryos into a KBF1400 box furnace for pre-calcination. The pre-calcination condition is 850 ° C for 2 hours. , and then crush the pre-fired block sample, grind it into powder, sieve it, ball mill it for 12 hours, and put it...

Embodiment 2

[0030] Embodiment 2, adopt the Na of purity 99.8% 2 CO 3 , 99.9% Bi 2 o 3 ,99.8% TiO 2 , 99.9% of Pr 2 o 3 and 99.9% Yb 2 o 3 As the raw material according to the chemical formula Bi 0.4997-x Na 0.5 wxya 0.0003 TiO 3 (x=0.005, 0.01, 0.02, 0.03, 0.04) weighing ratios were weighed respectively. The steps similar to Example 1 prepared 5 groups of Bi with different components respectively 0.4997-x Na 0.5 wxya 0.0003 TiO 3 (x=0.005,0.01,0.02,0.03,0.04) lead-free ferroelectric up-conversion fluorescent ceramics.

[0031] image 3 is the X-ray diffraction pattern of the prepared ceramics, from image 3 It can be seen that, except for x=0.04, the ceramics of the other four components have a pure perovskite structure.

[0032] Figure 4 It is the visible fluorescence spectrum emitted by five kinds of ceramics under the excitation of laser with a wavelength of 980nm. From the perspective of luminous intensity, when x exceeds 0.02, the green fluorescence intensity doe...

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PUM

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Abstract

The invention discloses a lead-free ferroelectric upconversion fluorescent ceramic material which is prepared by doping a rare-earth element with an oxide matrix with a perovskite structure. The material is characterized in that a chemical formula of the material is Bi0.5-x-yNa0.5YbxPryTiO3, wherein x is not less than 0.005 and not more than 0.04 and y is not less than 0.0003 and not more than 0.0015. The invention further discloses a preparation method and an application of the material. Compared with the prior art, the material has the advantages that the upconversion fluorescent radiation property in a ferroelectric substance can be realized by adding the trivalent rare-earth element Pr<3+> into (Bi0.5Na0.5)TiO3, so that the material becomes a multifunctional material with a controllable fluorescent electric field, and electricity leakage of the (Bi0.5Na0.5)TiO3 ceramic also can be improved.

Description

technical field [0001] The invention relates to an up-conversion luminescent material, which belongs to the technical field of luminescent materials. Background technique [0002] In recent years, up-conversion fluorescent nanomaterials have attracted extensive attention of researchers due to their excellent properties such as high fluorescence efficiency, good stability, and high resolution. It has broad application prospects in the fields of anti-counterfeiting identification, solar cells, bioluminescent markers, and up-conversion lasers. Especially in the field of biological upconversion fluorescent labeling, compared with traditional organic dyes and quantum dot fluorescent labeling materials, it has many excellent properties, such as high detection sensitivity, low background interference, and small body damage. [0003] Traditional up-conversion fluorescent materials are mainly sulfur-based and fluoride-based glass materials. For related documents, please refer to the...

Claims

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Application Information

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IPC IPC(8): C04B35/475C04B35/622
Inventor 罗来慧黄胤鹏王嘉姚永杰左强辉
Owner NINGBO UNIV
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