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Sodium niobate-based lead-free ferroelectric ceramic material with energy storage and photovoltaic effects and preparation method of sodium niobate-based lead-free ferroelectric ceramic material

A technology of photovoltaic effect and ferroelectric ceramics, applied in the field of ceramic materials, can solve the problems of low utilization rate of visible light region, low photoelectric conversion efficiency, low photoelectric current of solar cells, etc., and achieve high yield, easy production and strong practicability. Effect

Active Publication Date: 2021-07-02
SHAANXI NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the photoelectric conversion efficiency of ferroelectric photovoltaic cells is still at a low level (7%). Ferroelectric materials often exhibit the characteristics of high resistance insulation and wide band gap. The band gap of ferroelectric materials is mostly higher than 3eV, which makes most The absorption of ferroelectric materials to sunlight is concentrated in the ultraviolet region, while the utilization rate for the visible region is very low, so that the photogenerated current of the solar cell is very small.

Method used

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  • Sodium niobate-based lead-free ferroelectric ceramic material with energy storage and photovoltaic effects and preparation method of sodium niobate-based lead-free ferroelectric ceramic material
  • Sodium niobate-based lead-free ferroelectric ceramic material with energy storage and photovoltaic effects and preparation method of sodium niobate-based lead-free ferroelectric ceramic material
  • Sodium niobate-based lead-free ferroelectric ceramic material with energy storage and photovoltaic effects and preparation method of sodium niobate-based lead-free ferroelectric ceramic material

Examples

Experimental program
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Effect test

Embodiment 2

[0042] In step 1 of the present embodiment, according to 0.9NaNbO 3 -0.1La(Mn 0.5 Ni 0.5 )O 3 The stoichiometry was weighed separately for Na with a purity of 99.99%. 2 CO 3 4.97648g of Nb with a purity of 99.99% 2 o 5 12.48040g of La with a purity of 99.99% 2 o 3 1.69973g of NiO with a purity of 99.99% 0.38965g of MnO with a purity of 99.95% 2 0.45374g, other steps are identical with embodiment 1, and preparation molecular formula is 0.9NaNbO 3 -0.1La(Mn 0.5 Ni 0.5 )O 3 Sodium niobate-based lead-free ferroelectric ceramic materials.

Embodiment 3

[0044] In step 1 of the present embodiment, according to 0.85NaNbO 3 -0.15La(Mn 0.5 Ni 0.5 )O 3 The stoichiometry was weighed separately for Na with a purity of 99.99%. 2 CO 3 4.63015g Nb with a purity of 99.99% 2 o 5 11.61186g of La with a purity of 99.99% 2 o 3 2.51170g of NiO with a purity of 99.99% 0.57579g of MnO with a purity of 99.95% 2 0.67050g, other steps are identical with embodiment 1, and preparation molecular formula is 0.85NaNbO 3 -0.15La(Mn 0.5 Ni 0.5 )O 3 Sodium niobate-based lead-free ferroelectric ceramic materials.

Embodiment 4

[0046] In step 1 of the present embodiment, according to 0.8NaNbO 3 -0.2La(Mn 0.5 Ni 0.5 )O 3 The stoichiometry was weighed separately for Na with a purity of 99.99%. 2 CO 3 4. 29397g of NbO with a purity of 99.99% 5 10.76876g of La with a purity of 99.99% 2 o 3 3. 29989g of NiO with a purity of 99.99% 0.75648g of MnO with a purity of 99.95% 2 0.88090g, other steps are identical with embodiment 1, and preparation molecular formula is 0.8NaNbO 3 -0.2La(Mn 0.5 Ni 0.5 )O 3 Sodium niobate-based lead-free ferroelectric ceramic materials.

[0047] Each of the surfaces of the ceramic materials prepared in Examples 1 to 4 above was selected and polished with 320-mesh sandpaper, then polished with 800-mesh sandpaper, and finally polished to a thickness of 0.5mm with 1500-mesh sandpaper and corundum, and cleaned with alcohol Grind into powder, and use Japan Rigaku MiniFlex600 diffractometer to carry out XRD test, the results are shown in figure 1 , using the Cary5000UV-V...

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Abstract

The invention discloses a sodium niobate-based lead-free ferroelectric ceramic material with energy storage and photovoltaic effects and a preparation method of the sodium niobate-based lead-free ferroelectric ceramic material, the general formula of the ceramic material is (1-x) NaNbO3-xLa (Mn0. 5Ni0. 5) O3, x represents the molar ratio of La (Mn0. 5Ni0. 5) O3 in the total mass, and the value of x is 0.05-0.2. The ceramic material is prepared through the process steps of burdening, pre-sintering, ball milling, tabletting, non-pressure closed sintering and the like. The preparation method is simple, good in repeatability and high in yield, the obtained ceramic material has a photovoltaic effect, high energy storage density and energy storage efficiency, high Curie temperature and dielectric breakdown strength and ultrafast charge and discharge speed, when the value of x is 0.05, the highest effective energy storage density and energy storage efficiency are 1.77 J / cm < 3 > and 77.5% respectively, the dielectric breakdown strength is 200kV / cm, and the charging and discharging speed t0.9 is less than 50ns; when the value of x is 0.2, the maximum short-circuit current density is obtained, Jsc is 60 nA / cm < 2 >, and at the moment, the open-circuit voltage Voc is 0.71 eV.

Description

technical field [0001] The invention belongs to the technical field of ceramic materials, in particular to a sodium niobate-based lead-free ferroelectric ceramic material with energy storage and photovoltaic effects and a preparation method thereof. Background technique [0002] Energy is the strategic demand for the development of all countries in the world. Since the beginning of the 21st century, the development of countries is still highly dependent on traditional energy sources. As various resources are facing depletion, environmental problems caused by excessive consumption of traditional primary energy sources such as oil, coal, and natural gas have also attracted attention. . As a clean and renewable energy, solar energy is still a new type of energy that is most likely to replace traditional energy. At present, solar photovoltaic cells are mainly divided into silicon-based solar cells, thin-film solar cells, perovskite solar cells, and ferroelectric thin-film batte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622
CPCC04B35/495C04B35/622C04B2235/3201C04B2235/3227C04B2235/3267C04B2235/3279C04B2235/5427C04B2235/602C04B2235/656C04B2235/6562C04B2235/5436C04B2235/6567
Inventor 晁小练王记通杨祖培彭战辉石强强
Owner SHAANXI NORMAL UNIV
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