Unlock instant, AI-driven research and patent intelligence for your innovation.

a mn 2+ Doped fluoroniobium tantalate phosphor and its synthesis and application

A technology of niobium tantalate and phosphor, which is applied in the field of fluoroniobium tantalate phosphor and its synthesis and application, can solve problems such as chromaticity coordinate shift, and achieve high product purity, strong excitation efficiency, and excellent thermal stability sexual effect

Active Publication Date: 2021-10-08
XUZHOU NORMAL UNIVERSITY
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Phosphor powder prepared under reducing atmosphere will cause chromaticity coordinate shift due to high temperature oxidation during long-term use

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • a mn <sup>2+</sup> Doped fluoroniobium tantalate phosphor and its synthesis and application
  • a mn <sup>2+</sup> Doped fluoroniobium tantalate phosphor and its synthesis and application
  • a mn <sup>2+</sup> Doped fluoroniobium tantalate phosphor and its synthesis and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Ca 2.8 mn 0.2 Nb 2 Ta 2 o 12 f 2

[0028] According to the chemical formula Ca 1.8 mn 0.2 Nb 2 Ta 2 o 12 The stoichiometric ratio of each element is weighed: CaCO 3 : 3.600 g; MnCO 3 : 0.230 g; Nb 2 o 5 : 5.316 grams; Ta 2 o 5 : 8.840 g; put the weighed raw materials into an agate mortar and grind them carefully to obtain a mixture of these raw materials that is pre-calcined in an air atmosphere at a calcination temperature of 850° C. and a calcination time of 10 hours; Grind in an agate mortar, press the obtained mixture into a block, and calcinate it twice in an air atmosphere at a temperature of 1400°C for 1 hour, cool naturally, put it into an agate mortar and grind it into a powder, and obtain a pre-calcined mixture.

[0029] According to Ca 1.8 mn 0.2 Nb 2 Ta1.8 Ti 0.2 o 12 ·CaF 2 Medium CaF 2 Weigh the molar ratio of CaF 2 : 1.560 g and NH 4 F: 0.740 g; put the pre-calcined mixture and weighed CaF 2 and NH 4 F is ground, and...

Embodiment 2

[0034] Example 2: Ca 2.994 mn 0.006 Nb 2 Ta 2 o 12 f 2

[0035] According to the chemical formula Ca 1.994 mn 0.006 Nb 2 Ta 2 o 12 The stoichiometric ratio of each element is weighed: Ca(NO 3 ) 2 : 19.620 g; MnCO 3 : 0.0207 g; Nb 2 o 5 : 15.948 grams; Ta 2 o 5 : 26.520 g; put the weighed raw materials into an agate mortar, grind them carefully, and pre-calcine the mixture of these raw materials in an air atmosphere. The calcination temperature is 1200 ° C, and the calcination time is 1 hour; Grinding in an agate mortar, the obtained mixture is pressed into a block, and calcined for the second time in an air atmosphere, the calcination temperature is 1200 ° C, the calcination time is 10 hours, cooled naturally, put into an agate mortar and ground into a powder, and the pre-calcined mixture.

[0036] According to Ca 1.994 mn 0.006 Nb 2 Ta 2 o 12 ·CaF 2 Medium CaF 2 Weigh the molar ratio of CaF 2 : 4.680 g and NH 4 F: 2.220 g; put the pre-calcined mixtu...

Embodiment 3

[0038] Example 3: Ca 2.7 mn 0.3 Nb 2 Ta 2 o 12 f 2

[0039] According to the chemical formula Ca 1.7 mn 0.3 Nb 2 Ta 2 o 12 The stoichiometric ratio of each element is weighed: CaCO 3 : 5.950 g; MnCO 3 : 0.604 g; Nb 2 o 5 : 9.303 grams; Ta 2 o 5 : 15.470 g; put the weighed raw materials into an agate mortar and grind them carefully to obtain a mixture of these raw materials which is pre-calcined in an air atmosphere at a calcination temperature of 900°C for 3 hours; the obtained pre-calcined raw materials are placed again Grinding in an agate mortar, pressing the obtained mixture into a block, and calcining for the second time in an air atmosphere, the calcining temperature is 1300°C, and the calcining time is 4 hours. The product obtained in the above steps is naturally cooled to obtain a pre-calcined product.

[0040] According to Ca 1.7 mn 0.3 Nb 2 Ta 2 o 12 ·CaF 2 Medium CaF 2 Weigh the molar ratio of CaF 2 : 2.730 g and NH 4 F: 1.295 g; the pre-cal...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a Mn 2+ Doped fluorine niobium tantalate phosphor and its synthesis and application, the chemical formula of the phosphor is Ca 3‑2x mn 2x Nb 2 Ta 2 o 12 f 2 , x is Mn 2+ Ions replace Ca 2+ The number of moles of , 0.003≤x≤0.15, the first is to use the solid phase synthesis method to prepare the precursor CaF2 free 2‑2x mn 2x Nb 2 Ta 2 o 12 (0.003≤x≤0.15); then add calcium fluoride and ammonium fluoride to the precursor, mix thoroughly, press into blocks, and then use solid-phase synthesis and sintering to obtain it. The phosphor powder provided by the invention can well absorb near-ultraviolet light and emit red light with very pure chromaticity. The phosphor powder can be well matched with near-ultraviolet semiconductor LED chips, and is a potential method for preparing white light LED lighting devices. Red Glow Powder.

Description

technical field [0001] The invention relates to the field of inorganic fluorescent materials, in particular to a Mn 2+ Doped fluoroniobium tantalate phosphor and its synthesis and application. Background technique [0002] In recent years, with the innovation and development of semiconductors, semiconductor-based LED lighting has received great attention. Blue light and near-ultraviolet light semiconductor chip-based lighting has formed the mainstream commercial white LED lighting devices. Currently, commercial white LEDs are mainly two-primary white LEDs and three-primary white LEDs. Two primary color white light LEDs usually use blue light InGaN chips to excite yellow phosphors (YAG:Ce 3+ ). Due to the lack of red phosphor, this white LED emits weak light in the red spectral region, resulting in a high color temperature (CCT) and low color rendering index (Ra). The three-color white light LED is mainly composed of (near) ultraviolet chips to excite red, blue and green ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/67H01L33/50
CPCC09K11/673H01L33/502
Inventor 乔学斌王胜家赵君亚
Owner XUZHOU NORMAL UNIVERSITY