Magnetostriction-piezoelectric composite material and preparation method thereof

A piezoelectric composite material, a technology of magnetostrictive materials, applied in the selection of materials for magnetostrictive devices, the selection of materials for piezoelectric devices or electrostrictive devices, the manufacture of piezoelectric/electrostrictive devices/ Assembly and other directions can solve the problems of limiting the catalytic degradation rate of piezoelectric materials, and achieve the effects of cost saving, ensuring insulation performance and large interface area.

Pending Publication Date: 2022-02-18
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] However, in our daily life, the provision of mechanical vibration often increases the cost. If only relying on changes in the natural environment, the catalytic degradation rate of piezoelectric materials will be limited.

Method used

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  • Magnetostriction-piezoelectric composite material and preparation method thereof
  • Magnetostriction-piezoelectric composite material and preparation method thereof
  • Magnetostriction-piezoelectric composite material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0038] This embodiment prepares a magnetostrictive-piezoelectric composite material with a core-shell structure, and the magnetostrictive material CoFe 2 o 4 Nanoparticles are the core material of the core-shell structure, and the piezoelectric material Pb(Zr,Ti)O 3 As the shell layer, the magnetostrictive material was synthesized by the hydrothermal method, the piezoelectric material precursor was synthesized by the sol method, and then the piezoelectric material shell was wrapped around the magnetostrictive material by the sol-gel method. The schematic diagram of its preparation Such as figure 2 As shown, the specific preparation steps are as follows:

[0039] (1)Pb(Zr 0.52 Ti 0.48 )O 3 Preparation: lead acetate trihydrate (Pb(CH 3 COO) 2 ·3H 2 O), zirconium n-propoxide (Zr[CH 3 (CH 2 ) 2 O] 4 ), isopropanol titanate (Ti[CH 3 (CH 2 ) 2 O] 4 ) as a raw material, three raw materials are dissolved in glacial acetic acid (CH 3 COOH) solvent, then add 5% (relati...

Embodiment 2

[0044] This embodiment prepares a magnetostrictive-piezoelectric composite material with a core-shell structure, and the magnetostrictive material CoFe 2 o 4 Nanoparticles are the core material of the core-shell structure, and the piezoelectric material BiFeO 3 is the shell layer, and its preparation schematic diagram is as follows figure 2 As shown, the specific preparation steps are as follows:

[0045] (1) BiFeO 3 Preparation: Bismuth nitrate (Bi(NO 3 ) 3 ·5H 2 O) and iron nitrate (Fe(NO 3 ) 3 9H 2 O) is raw material, is dissolved in the acetic acid solution of 1:1 according to molar ratio, and excessively adds bismuth nitrate (Bi(NO 3 ) 3 ·5H 2 O) 1%, in order to prevent the hydrolysis of bismuth, heat several times at 70 ℃, until the solute basically dissolves. Add acetic acid and ethylene glycol according to the ratio of acetic acid:ethylene glycol of 1:1, heat and stir at 100°C to form a rust-red transparent sol, namely BiFeO 3 Precursor.

[0046] It was ...

Embodiment 3

[0051] This embodiment prepares a magnetostrictive-piezoelectric composite material with a core-shell structure, and the magnetostrictive material CoFe 2 o 4 Nanoparticles are the core material of the core-shell structure, and the piezoelectric material BiFeO 3 is the shell layer, and its preparation schematic diagram is as follows figure 2 As shown, the specific preparation steps are as follows:

[0052] (1) BiFeO 3 Preparation: Bismuth nitrate (Bi(NO 3 ) 3 ·5H 2 O) and iron nitrate (Fe(NO 3 ) 3 9H 2 O) is raw material, is dissolved in the acetic acid solution of 1:1 according to molar ratio, and excessively adds bismuth nitrate (Bi(NO 3 ) 3 ·5H 2 O) 1%, in order to prevent the hydrolysis of bismuth, heat several times at 70 ℃, until the solute basically dissolves. Add acetic acid and ethylene glycol according to the ratio of acetic acid: ethylene glycol = 1:1, heat and stir at 100°C to form a rust-red transparent sol, namely BiFeO 3 Precursor.

[0053] It was ...

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Abstract

The invention discloses a magnetostriction-piezoelectric composite material and a preparation method thereof. The magnetostriction-piezoelectric composite material is of a core-shell structure, a core layer of the core-shell structure is made of a magnetostriction material, a shell layer of the core-shell structure is made of a piezoelectric material, and the preparation method of the composite material comprises the following steps: (1) preparing a piezoelectric material precursor solution through a sol method; (2) preparing a magnetostrictive material through a hydrothermal method; and (3) adding the magnetostrictive material prepared in the step (2) into the piezoelectric material precursor solution prepared in the step (1), carrying out ultrasonic dispersion and drying, and carrying out thermal annealing treatment to obtain the magnetostrictive-piezoelectric composite material. The prepared magnetostriction-piezoelectric composite material is good in stability, convenient to recycle, capable of being repeatedly used for multiple times and high in recycling efficiency.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a magnetostrictive-piezoelectric composite material and a preparation method thereof. Background technique [0002] With the development of industrialization, the problem of environmental pollution caused by organic pollutants has become a difficult problem faced by the whole world. Among them, the water pollution caused by dyes is particularly serious, which has biological toxicity and carcinogenicity, and has strong stability in water. Serious Harmful to human health and the environment. [0003] At present, the main methods for treating industrial dye wastewater are traditional biological technology, physical technology or chemical technology. However, these technologies often have disadvantages such as low removal rate, high operating cost or easy to produce secondary pollution. The emerging photocatalytic technology has problems such as narrow light absorption ran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/20H01L41/18H01L41/39C02F1/72
CPCC02F1/725C02F2101/30H10N30/85H10N35/85H10N30/093
Inventor 孙肖瑜吴嫣玲徐睿劼李娣洁汪尧进
Owner NANJING UNIV OF SCI & TECH
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