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 hig

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

Example Embodiment

[0035] Example 1

[0036] CaBi 2 Ta 2 O 9 Matrix 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 the 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 , Press Ca 0.94 Er 0.06 Bi 2 Ta 2 O 9 In the stoichiometric ratio of Ca, Er, Bi and Ta elements, weigh the selected raw materials, weigh the raw materials and mix them, add anhydrous ethanol, grind in a mortar and mix well to obtain powder A, where the anhydrous ethanol and the raw material mixture The mass ratio is 3:1. The powder A is placed in an alumina crucible for pre-sintering, the pre-sintering temperature is 85O°C, the heating rate is 3°C / min, and the pre-sintered powder B is obtained after natural cooling after holding for 2 hours. After grinding the calcined powder B, it is sintered at a temperature of 1200°C for 4 hours at a heating rate of 3°C / min. Af...

Example Embodiment

[0040] Example 2

[0041] CaBi 2 Ta 2 O 9 Matrix lattice perovskite layer (A m-1 B m O 3m+1 ) 2- Preparation of Bulk Material Ca for Upconversion Luminescent Piezoelectric Ceramics by Doping Er in the 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 , Press Ca 0.94 Er 0.06 Bi 2 Ta 2 O 9 The stoichiometric ratios of the elements Ca, Er, Bi, and Ta are weighed and the selected raw materials are weighed and mixed. After mixing the raw materials, add anhydrous ethanol to grind in a mortar and mix well to obtain powder A. The mixture of anhydrous ethanol and raw materials The mass ratio is 2:1. The powder A is placed in an alumina crucible for pre-sintering, the pre-sintering temperature is 850°C, the heating rate is 3°C / min, and the temperature is kept for 2 hours, and the pre-sintered powder B is obtained after natural cooling. After grinding the pre-fired powder B, use 10% polyvinyl alcohol PVA as a binder for granu...

Example Embodiment

[0045] Example 3

[0046] CaBi 2 Ta 2 O 9 Matrix lattice perovskite layer (A m-1 B m O 3m+1 ) 2- Preparation of up-conversion luminescent piezoelectric material Ca by doping Er at the A site and Yb at the 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 , Press Ca 0.82 Er 0.06 Yb 0.12 Bi 2 Ta 2 O 9 The stoichiometric ratios of the elements Ca, Er, Yb, Bi and Ta are weighed from the selected raw materials. Preparation of 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 the same as in Example 1; the up-conversion ceramic block sample Ca of this example is prepared 0.94 Er 0.06 Bi 2 Ta 1.88 Yb 0.12 O 9 : Mix the weighed raw materials, add absolute ethanol, grind in a mortar and mix well to obtain powder A, wherein the mass ratio of the absolute ethanol to the raw material mixture is 1:1. Th...

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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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