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Barium magnesium niobate light-emitting ceramics and preparation method thereof

A technology of luminescent ceramics and barium magnesium niobate, applied in the field of luminescent materials, can solve the problems of low luminous efficiency and low quenching concentration, and achieve the effects of high luminous intensity, good density and high chemical stability

Active Publication Date: 2016-07-06
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problems of low doping quenching concentration and low luminous efficiency of samarium ions in other system materials, the present invention uses barium magnesium niobate ceramics as the matrix material, and utilizes its large structural tolerance to improve the doping of samarium ions. impurity concentration, improve its luminous efficiency, and prepare a new type of barium magnesium niobate luminescent ceramic with high luminous intensity

Method used

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  • Barium magnesium niobate light-emitting ceramics and preparation method thereof
  • Barium magnesium niobate light-emitting ceramics and preparation method thereof
  • Barium magnesium niobate light-emitting ceramics and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] 1) The analytically pure BaCO 3 , Nb 2 o 5 , 99.99% high-purity Sm 2 o 3 , MgO, SnO2 According to the molar ratio of 0.98:0.3:0.1:0.3:0.1, add ethanol and ball mill for 24 hours, then ignite at 1350°C to obtain the product obtained by ball milling for 12 hours for the second time, and then make Ba with 200 sieves. 0.98 SM 0.02 (Sn 0.1 Mg 0.3 Nb 0.6 )O 3 Ceramic powder.

[0031] 2) Add 5% polyvinyl alcohol aqueous solution (mass volume concentration: 1:20g / ml) to granulate the ceramic powder, stale for 24 hours, and crush the ceramic particles to pass through a 40 mesh sieve, then use the ceramic particles A dry-pressed tablet press was pressed into a ceramic green body under a pressure of 2 MPa, and then pressed under a cold isostatic pressure of 200 MPa for 10 minutes to make a uniformly pressed green body.

[0032] 3) After debinding the equalized green body at 600°C, carry out atmosphere sintering under an oxygen atmosphere. After fine polishing of chromiu...

Embodiment 2

[0034] 1) The analytically pure BaCO 3 , Nb 2 o 5 , 99.99% high-purity Sm 2 o 3 , MgO, SnO 2 According to the molar ratio of 0.995: 0.3: 0.0025: 0.3: 0.1, add ethanol and ball mill for 24 hours, then burn the product at 1300 ° C for 12 hours to make Ba 0.995 SM 0.005 (Sn 0.1 Mg 0.3 Nb 0.6 )O 3 Ceramic powder.

[0035] 2) Add 5% polyvinyl alcohol aqueous solution to the ceramic powder and granulate it, stale for 24 hours, break it into ceramic particles passing through a 40-mesh sieve, and then compress the ceramic particles under a pressure of 2 MPa with a dry tablet press into a ceramic green body, and then pressurized for 10 minutes under a cold isostatic pressure of 200 MPa to make a uniformly pressed green body.

[0036] 3) After debinding the equalized green body at 600°C, carry out atmosphere sintering under an oxygen atmosphere, the sintering temperature is 1575°C, keep warm for 60h, then cool with the furnace, rough sandpaper with 40 mesh and 200 mesh, and o...

Embodiment 3

[0038] 1) The analytically pure BaCO 3 , Nb 2 o 5 , 99.99% high-purity Sm 2 o 3 , MgO, SnO 2 According to the molar ratio of 0.985: 0.3: 0.0075: 0.3: 0.1, add ethanol and ball mill for 24 hours, then burn the product at 1300 ° C for 12 hours to make Ba 0.985 SM 0.015 (Sn 0.1 Mg 0.3 Nb 0.6 )O 3 Ceramic powder.

[0039] 2) Add 5% polyvinyl alcohol aqueous solution to the ceramic powder and granulate it, stale for 24 hours, break it into ceramic particles passing through a 40-mesh sieve, and then compress the ceramic particles under a pressure of 2 MPa with a dry tablet press into a ceramic green body, and then pressurized for 10 minutes under a cold isostatic pressure of 200 MPa to make a uniformly pressed green body.

[0040] 3) After debinding the equalized green body at 600°C, carry out atmosphere sintering under an oxygen atmosphere, the sintering temperature is 1575°C, keep warm for 60h, then cool with the furnace, rough sandpaper with 40 mesh and 200 mesh, and o...

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Abstract

The invention relates to barium magnesium niobate light-emitting ceramics and a preparation method thereof.The formula of the barium magnesium niobate light-emitting ceramics is Ba(1-x)Smx(Sn0.1Mg0.3Mg0.3Nb0.6)O3, wherein 0.005< / =x< / =0.03.The preparation method includes the steps of firstly, performing ball milling on a barium-source compound, a samarium-source compound, a magnesium-source compound, a tin-source compound and a niobium-source compound according to the weight requirements of the formula, then sintering under 1300-1350 DEG C to obtain products, and performing secondary ball milling on the products to obtain ceramic powder; secondly, adding a polyvinyl alcohol aqueous solution into the ceramic powder for pelleting, aging, crushing to obtain ceramic particles, forming the ceramic particles to obtain ceramic bodies, and preparing the ceramic bodies into even-pressure ceramic bodies through isostatic cool pressing; thirdly, sintering the even-pressure ceramic bodies under oxygen atmosphere after the even-pressure ceramic bodies discharge glue, cooling along with a furnace, and coarsely polishing and finely polishing to obtain the barium magnesium niobate light-emitting ceramics, wherein sintering temperature is 1500-1600 DEG C, and the temperature is kept for 48-60 hours.The barium magnesium niobate light-emitting ceramics have the advantages that the crystal boundary of the ceramics has no impurity phases, and the ceramics are good in compactness, even in grain size, high in chemical stability, and good in physical performances such as compressive strength; the ceramics have evident absorption peak in the visible light range, the quenching concentration can reach 2%mol, and high light-emitting intensity is achieved.

Description

technical field [0001] The invention belongs to the field of luminescent materials, and in particular relates to a barium magnesium niobate luminescent ceramic and a preparation method thereof. Background technique [0002] Luminescent materials refer to a class of materials that convert other energy into light energy radiation. Among the currently researched and applied luminescent materials, more than 90% of the luminescent materials use rare earth ions as the active center. The special electronic configuration of rare earth elements makes them have rich electronic energy levels. The luminescent materials with rare earth ions as the active center usually have rich emission lines, good monochromaticity, high conversion efficiency, stable physical and chemical properties, etc. Advantages, it can be widely used in flat display, military technology, semiconductor industry, solid-state laser and other fields, and is in the process of high-speed update and development. [0003]...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/622C04B35/626C04B35/634
CPCC04B35/495C04B35/622C04B35/626C04B35/62615C04B35/62695C04B35/63416C04B2235/3206C04B2235/3215C04B2235/3224C04B2235/3293C04B2235/9646
Inventor 沈杰薛广杰魏宾周静陈文
Owner WUHAN UNIV OF TECH
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