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Lead-free ferroelectric upconversion luminescent material and preparation method thereof

A luminescent material and ferroelectric technology, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of unable to meet the temperature measurement requirements, and the measurement environment has a large impact

Active Publication Date: 2021-08-31
SHENZHEN LOTUT INNOVATION DESIGN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional contact temperature sensors such as thermal resistors, thermocouples, and radiation thermometers have certain measurement limitations, which are greatly affected by the measurement environment and cannot meet the growing demand for temperature measurement.

Method used

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  • Lead-free ferroelectric upconversion luminescent material and preparation method thereof
  • Lead-free ferroelectric upconversion luminescent material and preparation method thereof
  • Lead-free ferroelectric upconversion luminescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Using high-purity K 2 CO 3 , Na 2 CO 3 , Nb 2 o 5 , Pr 2 o 3 and Yb 2 o 3 As raw material, according to (Na 0.5 K 0.5 ) 1-x-0.01 NbO 3 : x PR 3+ / 0.01Yb 3+ ( x =0.0006, 0.0008, 0.001, 0.002, 0.003, 0.004) in K, Na, Nb, Pr and Yb stoichiometric ratio to weigh the ingredients, then put the raw materials into the ball mill jar for ball milling, the ball milling conditions are: agate ball milling beads The number ratio of medium and large grains to small grains is 1:3, and the volume ratio of raw material volume to absolute ethanol is 1: 1.5; after ball milling for 9 hours, the raw materials are put into an oven for drying, and after drying, the raw materials are sieved once, and then Tablets were pressed by a tablet machine at 200 MPa, and the large tablets were placed in a muffle furnace at 850 °C for 4 hours to synthesize (Na 0.5 K 0.5 ) 1-x-0.01 NbO 3 : x PR 3+ / 0.01Yb 3+ Sample precursors. The obtained sample precursor was crushed again, put in...

Embodiment 2

[0042] Using high-purity K 2 CO 3 , Na 2 CO 3 , Nb 2 o 5 , Pr 2 o 3 and Yb 2 o 3 As raw material, according to (Na 0.5 K 0.5 ) 1-x-0.01 NbO 3 : x PR 3+ / 0.01Yb 3+ ( x =0.002) in K, Na, Nb, Pr and Yb stoichiometric ratio carry out weighing batching, then raw material is put into ball mill jar and carry out ball milling, and ball milling condition is: the number ratio of large particle and small particle in the agate ball milling bead is 1 : 3.5, the volume ratio of raw material volume and dehydrated ethanol is 1: 2.5; After ball milling 8 hours, raw material is put into baking oven and dries, and after drying, raw material is sieved once, utilizes tablet press to compress tablet under 150 MPa After the pressing, the large sheet was put into a muffle furnace and kept at 800°C for 8 hours to synthesize a perovskite structure (Na 0.5 K 0.5 ) 1-x-0.01 NbO 3 : x PR 3+ / 0.01Yb 3+ Sample precursors. The obtained sample precursor was crushed again, put into the...

Embodiment 3

[0047] Using high-purity K 2 CO 3 , Na 2 CO 3 , Nb 2 o 5 , Pr 2 o 3 and Yb 2 o 3 As raw material, according to (Na 0.5 K 0.5 ) 1-x-0.01 NbO 3 : x PR 3+ / 0.01Yb 3+ ( x =0.004) in K, Na, Nb, Pr and Yb stoichiometric ratio carry out weighing batching, then raw material is put into ball mill jar and carry out ball milling, and ball milling condition is: the number ratio of large particle and small particle in the agate ball milling bead is 1 : 3.2, the volume ratio of raw material volume and dehydrated ethanol is 1: 2; After ball milling for 10 hours, raw material is put into oven for drying, and after drying, raw material is sieved once, and utilizes tabletting machine to compress tablet under 220 MPa After the pressing, the large sheet was put into a muffle furnace and kept at 820°C for 6 hours to synthesize a perovskite structure (Na 0.5 K 0.5 ) 1-x-0.01 NbO 3 : x PR 3+ / 0.01Yb 3+ Sample precursors. The obtained sample precursor was crushed again, put i...

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PUM

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Abstract

A lead-free ferroelectric upconversion luminescent material, including the structure of ABO 3 The perovskite lead-free ferroelectric ceramic material of structure is characterized in that: the chemical formula of this lead-free ferroelectric ceramic material is (Na 0.5 K 0.5 ) 1‑x‑0.01 NbO 3 : x PR 3+ / 0.01Yb 3+ , where, 0.0006≤ x ≤0.004, by adding at the A position x mol of rare earth element Pr 3+ And 0.01mol of rare earth element Yb 3+ , and changing Na 0.5 K 0.5 NbO 3 The content of the material, and then realize the up-conversion luminescence of the material. The invention also discloses a preparation method of the lead-free ferroelectric up-conversion luminescent material. Compared with the prior art, the lead-free ferroelectric upconversion luminescent material of the present invention has photochromic and temperature sensing properties, and the preparation method of the material is simple and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of ferroelectric material preparation, and in particular relates to a lead-free ferroelectric up-conversion luminescent material and a preparation method thereof. Background technique [0002] An up-conversion luminescent material is a luminescent material that absorbs low-energy light radiation and emits high-energy light radiation. The luminescence mechanism is due to the coupling effect of two-photons or multi-photons; its characteristic is that the absorbed photon energy is lower than the emitted photon energy. The main application fields of up-conversion include optical storage materials, all-solid-state compact laser devices, and infrared quantum counters. , three-dimensional display, up-conversion phosphors, temperature detectors, fluorescent probes for biomolecules, etc. Since the discovery of upconversion luminescent materials in the 1960s, people have conducted extensive research on upconversion l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/495C04B35/622C04B35/626C04B35/638C09K11/77
CPCC04B35/495C04B35/622C04B35/62605C04B35/638C04B2235/3201C04B2235/3224C04B2235/6567C09K11/7783
Inventor 章权罗来慧祝泽林杜鹏
Owner SHENZHEN LOTUT INNOVATION DESIGN CO LTD
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