BT-KBT-NN (BaTiO3-K0.5Bi0.5TiO3-NaNbO3)-based high energy storage density ceramic and preparation method thereof

A BT-KBT-NN, high energy storage density technology, applied in the field of energy storage material preparation, can solve the problem of low energy storage density, and achieve the effect of simple operation, simple equipment and low cost

Inactive Publication Date: 2018-06-12
SHAANXI UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The widely studied Ba 0.4 Sr 0.6 TiO 3 The energy storage density of ceramics is only ~0.37J / cm 3 , low energy storage density

Method used

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  • BT-KBT-NN (BaTiO3-K0.5Bi0.5TiO3-NaNbO3)-based high energy storage density ceramic and preparation method thereof

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preparation example Construction

[0029] A preparation method of BT-KBT-NN base high energy storage density ceramics, comprising the following steps:

[0030] Step 1: Prepare BT calcined powder, KBT calcined powder and NN calcined powder; wherein, BT calcined powder is obtained by the following method: according to the chemical formula BaTiO 3 , mix barium carbonate and titanium dioxide evenly and keep warm at 1150°C for 3 hours to obtain BT calcined powder; KBT calcined powder is obtained by the following method: According to chemical formula K 0.5 Bi 0.5 TiO 3 , mix potassium carbonate, bismuth oxide and titanium dioxide evenly and keep warm at 950°C for 4 hours to obtain KBT calcined powder; NN calcined powder is obtained by the following method: according to the chemical formula NaNbO 3 , mix sodium carbonate and niobium pentoxide evenly and keep warm at 850°C for 2 hours to prepare NN calcined powder;

[0031] Step 2: BT calcined powder, KBT calcined powder and NN calcined powder according to chemical ...

Embodiment 1

[0035] 1) According to the chemical formula BaTiO 3 (BT), mix barium carbonate and titanium dioxide evenly and keep warm at 1150°C for 3 hours to prepare BT calcined powder.

[0036] 2) According to chemical formula K 0.5 Bi 0.5 TiO 3 (KBT), mix potassium carbonate, bismuth oxide and titanium dioxide evenly and keep it warm at 950°C for 4 hours to obtain KBT calcined powder.

[0037]3) According to the chemical formula NaNbO 3 (NN), mix sodium carbonate and niobium pentoxide uniformly and keep it at 850°C for 2 hours to obtain NN calcined powder.

[0038] 4) BT calcined powder, KBT calcined powder and NN calcined powder according to chemical formula 0.96(0.92BaTiO 3 -0.08(K 0.5 Bi 0.5 )TiO 3 )-0.04NaNbO 3 The ingredients are mixed evenly by ball milling for 6 hours with deionized water as the ball milling medium, and then dried at 80°C. After tableting and molding, they are kept at 1160°C for 2 hours and sintered into porcelain to obtain high energy storage density ce...

Embodiment 2

[0040] 1) According to the chemical formula BaTiO 3 (BT), mix barium carbonate and titanium dioxide evenly and keep warm at 1150°C for 3 hours to prepare BT calcined powder.

[0041] 2) According to chemical formula K 0.5 Bi 0.5 TiO 3 (KBT), mix potassium carbonate, bismuth oxide and titanium dioxide evenly and keep it warm at 950°C for 4 hours to obtain KBT calcined powder.

[0042] 3) According to the chemical formula NaNbO 3 (NN), mix sodium carbonate and niobium pentoxide uniformly and keep it at 850°C for 2 hours to obtain NN calcined powder.

[0043] 4) BT calcined powder, KBT calcined powder and NN calcined powder according to chemical formula 0.96(0.92BaTiO 3 -0.08(K 0.5 Bi 0.5 )TiO 3 )-0.04NaNbO 3 The ingredients were mixed evenly by ball milling for 7 hours with deionized water as the ball milling medium, then dried at 80°C, pressed into tablets and formed, then sintered at 1160°C for 4 hours to obtain ceramic materials with high energy storage density.

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Abstract

The invention discloses a BT-KBT-NN (BaTiO3-K0.5Bi0.5TiO3-NaNbO3)-based high energy storage density ceramic and a preparation method thereof. The preparation method comprises the following steps: firstly, preparing BT presintering powder, KBT presintering powder and NN presintering powder; then, carrying out burdening on the BT presintering powder, the KBT presintering powder and the NN presintering powder according to a chemical formula (1-x)(0.92BaTiO[3]-0.08(K[0.5]Bi[0.5])TiO[3])-xNaNbO[3], wherein x is 0.02-0.08, and x is a mole percent; evenly mixing, drying, tabletting, and forming to obtain mixed tablets; then, sintering the mixed tablets to obtain the BT-KBT-NN-based high energy storage density ceramic.

Description

technical field [0001] The invention belongs to the technical field of preparation of energy storage materials, and in particular relates to a BT-KBT-NN based ceramic with high energy storage density and a preparation method thereof. Background technique [0002] As an important energy storage device, capacitor is one of the electronic components widely used in electronic equipment. Ceramic capacitors are widely used due to their advantages such as wide operating temperature range, long life, and reliable performance. Capacitive energy storage is easy to hold and does not require superconductors. Another important point of capacitive energy storage is that it can provide instantaneous high power, which is very suitable for applications such as lasers and flashlights. The amount of energy stored in a capacitor is determined by its size and the energy storage density of the dielectric material. In order to reduce its size and increase its energy storage capacity, the develo...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B35/622
CPCC04B35/468C04B35/622C04B2235/3201C04B2235/3215C04B2235/3232C04B2235/3251C04B2235/3298
Inventor 蒲永平万晶
Owner SHAANXI UNIV OF SCI & TECH
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