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Bismuth layered perovskite-like structure oxide up-conversion luminescent piezoelectric material and preparation method thereof

A perovskite structure and piezoelectric material technology, applied in the field of oxide up-conversion luminescent piezoelectric materials and their preparation, can solve the problems of unreported up-conversion luminescence characteristics, low output, high cost, etc.

Inactive Publication Date: 2011-12-14
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Bi involved in the above two patents 4 Ti 3 o 12 Thin films or nanopowders are prepared by the sol-gel method, the process is more complicated, the cost is higher, and the output is lower
Up-conversion luminescence properties of other bismuth-layered perovskite-like oxide piezoelectric materials have not been reported so far

Method used

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  • Bismuth layered perovskite-like structure oxide up-conversion luminescent piezoelectric material and preparation method thereof
  • Bismuth layered perovskite-like structure oxide up-conversion luminescent piezoelectric material and preparation method thereof
  • Bismuth layered perovskite-like structure oxide up-conversion luminescent piezoelectric material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Ca Bi 2 Ta 2 o 9 The host lattice perovskite layer (A m-1 B m o 3m+1 ) 2- Preparation of up-conversion luminescent piezoelectric ceramic powder material sample Ca by doping Er in middle A site 0.94 Er 0.06 Bi 2 Ta 2 o 9 .

[0037] Raw material selection CaCO 3 、Er 2 o 3 、 Bi 2 o 3 and Ta 2 o 5 , by Ca 0.94 Er 0.06 Bi 2 Ta 2 o 9 The stoichiometric ratio of Ca, Er, Bi and Ta elements in the formula is to weigh the selected raw materials, weigh the raw materials and mix them, add absolute ethanol, grind in a mortar and mix well to obtain powder A, wherein the absolute ethanol and raw material mixture The mass ratio is 3:1. Put the powder A in an alumina crucible for pre-calcination, the pre-fire temperature is 850°C, the heating rate is 3°C / min, keep it warm for 2 hours and cool naturally to get the pre-fire powder B. After grinding the calcined powder B, sinter it at a temperature of 1200°C for 4 hours at a heating rate of 3°C / min, cool it naturall...

Embodiment 2

[0041] Ca Bi 2 Ta 2 o 9 The host lattice perovskite layer (A m-1 B m o 3m+1 ) 2- Preparation of upconversion luminescence piezoelectric ceramic bulk material Ca by doping Er in middle A site 0.94 Er 0.06 Bi 2 Ta 2 o 9 .

[0042] Raw material selection CaCO 3 、Er 2 o 3 、 Bi 2 o 3 and Ta 2 o 5 , by Ca 0.94 Er 0.06 Bi 2 Ta 2 o 9 The stoichiometric ratio of the elements Ca, Er, Bi and Ta in the medium is to weigh the selected raw materials, add absolute ethanol after weighing the raw materials and mix them, grind them in a mortar and mix thoroughly to obtain powder A, wherein the absolute ethanol and raw material mixture The mass ratio is 2:1. Put the powder A in an alumina crucible for pre-calcination, the pre-fire temperature is 850°C, the heating rate is 3°C / min, keep it warm for 2 hours and cool naturally to get the pre-fire powder B. After grinding the calcined powder B, granulate it with 10% polyvinyl alcohol PVA as a binder, and then press it into a ...

Embodiment 3

[0046] Ca Bi 2 Ta 2 o 9 The host lattice perovskite layer (A m-1 B m o 3m+1 ) 2- Preparation of up-conversion luminescent piezoelectric material Ca by doping Er in A site and Yb in B site 0.82 Er 0.06 Yb 0.12 Bi 2 Ta 2 o 9 Ceramic powder materials and ceramic bulk materials.

[0047] Raw material selection CaCO 3 、Er 2 o 3 , Yb 2 o 3 、 Bi 2 o 3 and Ta 2 o 5 , by Ca 0.82 Er 0.06 Yb 0.12 Bi 2 Ta 2 o 9 The stoichiometric ratio of elements Ca, Er, Yb, Bi and Ta in the medium is weighed from selected raw materials. Prepare the up-conversion ceramic powder Ca of this embodiment 0.82 Er 0.06 Yb 0.12 Bi 2 Ta 2 o 9 The rest of the steps are consistent with Example 1; the up-conversion ceramic block sample Ca of the present embodiment is prepared 0.94 Er 0.06 Bi 2 Ta 1.88 Yb 0.12 o 9 : After mixing the weighed raw materials, add absolute ethanol to grind in a mortar and mix thoroughly to obtain powder A, wherein the mass ratio of absolute ethanol to...

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Abstract

The invention relates to an infrared-excited oxide up-conversion luminescence piezoelectric material of a bismuth lamellar perovskite-like structure and a preparation method thereof. The up-conversion luminescence piezoelectric material has a chemical general formula of Am-1-x-RxYbyBi2BmO3M<+3>, wherein R is selected from Er<3+>, Ho<3+> and Tm<3+>, A is selected from Bi<3>, Ca<2+>, Sr<2+>, Ba<2+>, Pb<2+>, Na<+>, K<+>, La<3+> and Y<3+>, B is selected from Ti<4+>, Zr<4+>, Nb<5+>, Ta<5+>, W<6+> and Mo<6+>, m is a positive integer not smaller than 2 and not more than 8, x is not smaller than 0.000001 and not more than 0.3, and y is not smaller than 3.0 and not more than 0.6. The up-conversion luminescence piezoelectric material is prepared by adopting a solid-phase reaction method, has the characteristics of good thermal stability, good chemical stability, easiness for synthesis, high luminous intensity and adjustable color, and can be widely applied to various aspects such as three-dimensional display, infrared detection, counterfeiting prevention, solar cells and photoelectric integration, micro-electro-mechanical systems, photoelectric sensing and the like.

Description

technical field [0001] The invention relates to a bismuth layered perovskite-like structure oxide up-conversion luminescent piezoelectric material excited by infrared light and a preparation method thereof, belonging to the field of photoelectric multifunctional materials. Background technique [0002] Up-conversion luminescent materials are materials that can emit visible light when excited by infrared lasers. They have broad application prospects in anti-counterfeiting, infrared detection, three-dimensional display, short-wavelength all-solid-state lasers, biomarkers, and solar cells. At present, the commercial up-conversion luminescent materials are mainly fluorides. Although it has low phonon energy and high up-conversion luminescence probability, the preparation process is complicated, and fluorides are toxic, and their thermal and chemical stability are relatively low. Difference. Compared with fluorides, the phonon energy of oxides is high, and it is difficult to obt...

Claims

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Application Information

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IPC IPC(8): C04B35/453C04B35/495C04B35/622
Inventor 王旭升彭登峰李艳霞孙海勤陈寰贝唐棉棉
Owner TONGJI UNIV
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