BNT-BST-KNN anti-ferroelectric energy-storage ceramic and preparation method thereof

A BNT-BST-KNN, antiferroelectric technology, applied in the field of functional ceramics, can solve the problem of increasing the phase change electric field of materials, and achieve the effect of expanding the stable area

Active Publication Date: 2017-03-01
XIAN AERONAUTICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The research found that La 3+ Doping can reduce the electric field hy

Method used

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  • BNT-BST-KNN anti-ferroelectric energy-storage ceramic and preparation method thereof
  • BNT-BST-KNN anti-ferroelectric energy-storage ceramic and preparation method thereof
  • BNT-BST-KNN anti-ferroelectric energy-storage ceramic and preparation method thereof

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Embodiment 1

[0027] Prepare the present invention by roasting synthetic method, specifically carry out according to the following steps:

[0028] Step 1, according to molecular formula (1-x) Bi of the present invention 1 / 2 Na 1 / 2 TiO 3 -xBa 1 / 2 Sr 1 / 2 TiO 3 -0.05KNaNbO 3 Wherein x=0.01, calculate the requirement of each raw material, required raw material is: the titanium dioxide that purity is 98%, molecular weight is 79.87; Bismuth, barium carbonate with a purity of 99% and a molecular weight of 197.34, niobium oxide with a purity of 99.9% and a molecular weight of 265.81, potassium carbonate with a purity of 99% and a molecular weight of 138.21, and strontium carbonate with a purity of 99.9% and a molecular weight of 147.63; Weigh with an electronic balance, and the weighing is accurate to 3 decimal places;

[0029] Step 2: Pour the weighed raw materials into a nylon tank, and add an appropriate amount of ethanol with a volume concentration of 99.9% to the nylon tank, so that the...

Embodiment 2

[0032] Except the value of x in step 1, other steps are identical with embodiment 1;

[0033] According to the molecular formula (1-x) Bi of the present invention 1 / 2 Na 1 / 2 TiO 3 -xBa 1 / 2 Sr 1 / 2 TiO 3 -0.05KNaNbO 3 , where x=0.03, calculate the required amount of each raw material, weigh with an electronic balance, and the weighing is accurate to 3 decimal places.

Embodiment 3

[0035] Except the value of x in step 1, other steps are identical with embodiment 1;

[0036] According to the molecular formula (1-x) Bi of the present invention 1 / 2 Na 1 / 2 TiO 3 -xBa 1 / 2 Sr 1 / 2 TiO 3 -0.05KNaNbO 3 , where x=0.05, calculate the required amount of each raw material, weigh with an electronic balance, and the weighing is accurate to 3 decimal places.

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Abstract

The invention discloses a BNT-BST-KNN anti-ferroelectric energy-storage ceramic and a preparation method thereof, which belong to the technical field of functional ceramic. A molecular formula is (1-x)Bi1/2Na1/2TiO3 xBa1/2Sr1/2TiO3-0.05KNaNbO3, wherein x is 0.01, 0.03, 0.05 or 0.07. The BNT-BST-KNN anti-ferroelectric energy-storage ceramic solves the problems that La<3+>-doped electroceramic reduces the electric field hysteresis and increases the phase-transition electric field of a material, and the anti-ferroelectric phase of B site Zr<2+> element-doped electroceramic is unstable; the added Sr element is helpful for enlarging a stable area of the tetragonal anti-ferroelectric phase, and the electricity performance of the BNT-BST-KNN anti-ferroelectric energy-storage ceramic can be changed by doping BaSrTiO3 and KNaNbO3.

Description

technical field [0001] The invention belongs to the technical field of functional ceramics, and relates to a BNT-BST-KNN antiferroelectric energy storage ceramic and a preparation method thereof. Background technique [0002] In 1951, American scientist Kittle C proposed the concept of antiferroelectricity based on the macroscopic phenomenological theory, predicted the existence of antiferroelectricity, and explained its basic characteristics. In the 1960s, B Jaffe and D Berlincourt and others passed the PbZrTiO 3 (PZT) doping modified to obtain PbZrSnTiO that can be induced by an electric field from antiferroelectric to ferroelectric at room temperature 3 (PZST) antiferroelectric compounds. Lead Lanthanum Zirconate Titanate Stannate (Pb, La) (Zr, Sn, Ti)O 3 The (PZST) ceramic component is located near the antiferroelectric-ferroelectric quasi-tropic phase boundary, and it undergoes a phase transition under a certain electric field, which can induce the transformation fro...

Claims

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Application Information

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IPC IPC(8): C04B35/475
CPCC04B35/475C04B2235/3234C04B2235/3236C04B2235/3255
Inventor 曹静王永锋李兆蔡向朝
Owner XIAN AERONAUTICAL UNIV
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