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Potassium niobate-modified BT-KBT-based energy storage ceramic material and preparation method thereof

A technology for potassium niobate and energy storage, applied in the field of BT-KBT-based energy storage ceramics modified by potassium niobate and its preparation, can solve the problems of low energy storage density and achieve simple operation, low cost and simple equipment Effect

Active Publication Date: 2018-04-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, 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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  • Potassium niobate-modified BT-KBT-based energy storage ceramic material and preparation method thereof
  • Potassium niobate-modified BT-KBT-based energy storage ceramic material and preparation method thereof
  • Potassium niobate-modified BT-KBT-based energy storage ceramic material and preparation method thereof

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Effect test

Embodiment 1

[0028] A preparation method of potassium niobate modified BT-KBT based energy storage ceramic material, comprising the following steps:

[0029] 1) According to the chemical formula BaTiO 3 (BT), mix barium carbonate and titanium dioxide uniformly and keep warm at 1150°C for 3 hours to prepare BT ceramic powder. ;

[0030] 2) According to chemical formula K 0.5 Bi 0.5 TiO 3 (KBT), potassium carbonate, bismuth oxide and titanium dioxide were mixed uniformly and kept at 950°C for 4 hours to obtain KBT ceramic powder.

[0031] 3) According to the chemical formula KNbO 3 (KN), mix potassium carbonate and niobium pentoxide evenly and keep it warm at 800°C for 2 hours to prepare potassium niobate ceramic powder.

[0032] 4) BT ceramic powder, KBT ceramic powder and potassium niobate powder according to chemical formula 0.96 (0.92BaTiO 3 -0.08(K 1 / 2 Bi 1 / 2 )TiO 3 )-0.04KNbO 3 The ingredients are mixed evenly by ball milling for 6 hours with deionized water as the ball mill...

Embodiment 2

[0034] A preparation method of potassium niobate modified BT-KBT based energy storage ceramic material, comprising the following steps:

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

[0036] 2) According to chemical formula K 0.5 Bi 0.5 TiO 3 (KBT), potassium carbonate, bismuth oxide and titanium dioxide were mixed uniformly and kept at 950°C for 4 hours to obtain KBT ceramic powder.

[0037] 3) According to the chemical formula KNbO 3 (KN), mix potassium carbonate and niobium pentoxide evenly and keep it warm at 800°C for 2 hours to prepare potassium niobate ceramic powder.

[0038] 4) BT ceramic powder, KBT ceramic powder and potassium niobate powder according to chemical formula 0.96 (0.92BaTiO 3 -0.08(K 1 / 2 Bi 1 / 2 )TiO 3 )-0.04KNbO 3 The ingredients were mixed evenly by ball milling for 6 hours with deionized water as the ball mil...

Embodiment 3

[0040] A preparation method of potassium niobate modified BT-KBT based energy storage ceramic material, comprising the following steps:

[0041] 1) According to the chemical formula BaTiO 3 (BT), mix barium carbonate and titanium dioxide uniformly and keep warm at 1150°C for 3 hours to prepare BT ceramic powder. ;

[0042]2) According to chemical formula K 0.5 Bi 0.5 TiO 3 (KBT), potassium carbonate, bismuth oxide and titanium dioxide were mixed uniformly and kept at 950°C for 4 hours to obtain KBT ceramic powder.

[0043] 3) According to the chemical formula KNbO 3 (KN), mix potassium carbonate and niobium pentoxide evenly and keep it warm at 800°C for 2 hours to prepare potassium niobate ceramic powder.

[0044] 4) BT ceramic powder, KBT ceramic powder and potassium niobate powder according to chemical formula 0.96 (0.92BaTiO 3 -0.08(K 1 / 2 Bi 1 / 2 )TiO 3 )-0.04KNbO 3 The ingredients were mixed evenly by ball milling for 6 hours with deionized water as the ball mill...

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Abstract

The invention relates to a potassium niobate-modified BT-KBT-based energy storage ceramic material and a preparation method thereof and belongs to the technical field of electronic ceramics. The potassium niobate-modified BT-KBT-based energy storage ceramic material has a formula of (1-x)(0.92BaTiO3-0.08(K1 / 2Bi1 / 2)TiO3)-xKNbO3 (x=0.04-0.10). The preparation method comprises respectively synthetizing BT, KBT and KN ceramic powder from barium carbonate, potassium carbonate, antimony oxide, titanium dioxide and antimony pentoxide as raw materials, and according to the chemical formula, carrying out material blending, ball milling, drying, tableting, molding and sintering to obtain the BT-KBT-based energy storage ceramic material. The solid phase method for preparing the ceramic material has the advantages of low cost, high yield and simple processes and provides the basis for large-scale and low-cost preparation of the novel high energy density ceramic material.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a BT-KBT-based energy storage ceramic modified by potassium niobate 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 development of c...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B35/622
CPCC04B35/468C04B35/622C04B2235/3201C04B2235/3251C04B2235/3298C04B2235/6567
Inventor 蒲永平万晶
Owner SHAANXI UNIV OF SCI & TECH
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