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Application of lead-free ferroelectric materials as substrates for pulsed power switches and their ferroelectric switches

A pulse power switch and ferroelectric material technology, applied in the pulse field, can solve problems such as lead environmental pollution, and achieve the effects of low environmental pollution, good switching performance, and good application prospects

Inactive Publication Date: 2019-11-29
INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to: most of the existing ferroelectric switches are made of lead zirconate titanate or BaTiO 3 As a substrate, the lead in lead zirconate titanate will cause serious environmental pollution, and PZT and BaTiO 3 The use temperature of ferroelectric materials is mostly within 100°C, which has certain limitations. To provide a lead-free ferroelectric material as a pulse power switch substrate application and its ferroelectric switch

Method used

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  • Application of lead-free ferroelectric materials as substrates for pulsed power switches and their ferroelectric switches
  • Application of lead-free ferroelectric materials as substrates for pulsed power switches and their ferroelectric switches
  • Application of lead-free ferroelectric materials as substrates for pulsed power switches and their ferroelectric switches

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1 Na 0.5 Bi 0.5 TiO 3 Ferroelectric switch application of ferroelectric ceramics

[0038] (1) Preparation of Na using plasma electric spark sintering technology 0.5 Bi 0.5 TiO 3 Ferroelectric ceramics have a relative density of 99%.

[0039] (2) The ferroelectric ceramics sintered in step (1) are sliced, and the resulting sample has a thickness of 0.5 mm and a size of 3×2 mm. Coat silver electrodes on both sides of the sample, the electrode size is 2.5×1.5mm, sintered at a high temperature of 600℃ for 1h, after cooling to room temperature, take out the sample.

[0040] (3) Heat the sample prepared in step (2) to 80°C in silicone oil and keep it for 15 minutes. Apply 2kV DC voltage to both sides of the ceramic and keep this condition for 15 minutes.

[0041] (4) Using the same conditions as above, prepare 5 ceramic samples.

[0042] (5) Test Na under different temperature conditions 0.5 Bi 0.5 TiO 3 Switching performance of ferroelectric ceramics. The test results are s...

Embodiment 2

[0045] Example 2 Na 0.5 Bi 0.5 TiO 3 Ferroelectric switch application of ferroelectric ceramics

[0046] (1) Preparation of Na by hot pressing sintering technology 0.5 Bi 0.5 TiO 3 The relative density of ferroelectric ceramics and porcelain is 96.5%.

[0047] (2) Slice the ceramics sintered in step (1), the sample thickness is 1.5mm, and the size is 2.5×2.5mm. Coat silver electrodes on both sides of the sample, the electrode size is 2.4×2.4mm, sintered at a high temperature of 600°C for 1h, cooled to room temperature, and the sample is taken out.

[0048] (3) Heat the sample prepared in step (2) to 120°C in silicone oil and keep it for 15 minutes. Apply 4kV DC voltage to both sides of the ceramic and keep this condition for 15 minutes.

[0049] (4) Repeat the aforementioned steps (1)-(3) five times (that is, repeat the preparation under the same conditions) to prepare 5 ceramic samples.

[0050] (5) Test Na under different temperature conditions 0.5 Bi 0.5 TiO 3 Switching performance...

Embodiment 3

[0053] Example 3 Na 0.5 Bi 0.5 TiO 3 -xCeO 2 Ferroelectric switch application of ferroelectric ceramics

[0054] (1) Preparation of Na by hot pressing sintering technology 0.5 Bi 0.5 TiO 3 -xCeO 2 (x = 0.002, 0.005, 0.01) Ferroelectric ceramics. The relative densities of the obtained ceramics were 96.5%, 96.3%, and 96.9%, respectively.

[0055] (2) Slice the ceramic sintered in step (1) to obtain Na 0.5 Bi 0.5 TiO 3 -xCeO 2 (x=0.002, 0.005, 0.01) the sample thickness is 1.0mm, and the size is 3×3mm. Coated silver electrodes on both sides of the sample, the electrode size is 2.9×2.9mm, sintered at a high temperature of 500℃ for 1h, after cooling to room temperature, take out the sample.

[0056] (3) Heat all the samples prepared in step (2) to 60° C. in silicone oil and keep them for 15 minutes. Apply a 5kV DC voltage to both sides of the ceramic sample and maintain this condition for 15 minutes.

[0057] (4) At room temperature, test the Na 0.5 Bi 0.5 TiO 3 -xCeO 2 The switching per...

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Abstract

The invention discloses an application of a lead-free ferroelectric material as a base material for pulsed-power switches and a ferroelectric switch. The objective is to solve the problem that most of existing ferroelectric switches adopt lead zirconate titanate or BaTiO3 as a base material, lead in the lead zirconate titanate can lead to severe environmental pollution, moreover, the usage temperatures of the PZT and BaTiO3 ferroelectric materials are mostly within 100 DEG C, and therefore certain limitation exists. Through a research, the applicant discovers that Na0.5Bi0.5TiO3 ferroelectric ceramic and a solid solution material ((1-x)(Bi0.5Na0.5)TiO3-xBiAlO3, Na0.5Bi0.5TiO3-xZnO) thereof have good switching performance under the triggering of an electric field, and based on the discovery, the technical scheme of the invention is achieved. In the application, the lead-free ferroelectric material is adopted as the base material for the pulsed-power switches, and the lead-free ferroelectric material is one or more of the Na0.5Bi0.5TiO3 ferroelectric ceramic and the solid solution material thereof. The Na0.5Bi0.5TiO3 ferroelectric ceramic and the solid solution material thereof are adopted as the base material for the pulsed-power switches for the first time to be applied in the ferroelectric switch, a good effect is achieved, and therefore the lead-free ferroelectric material has high application value and good application prospect.

Description

Technical field [0001] The invention relates to the field of pulses, in particular to the application of a lead-free ferroelectric material as a pulse power switch substrate and its ferroelectric switch, which is a novel lead-free high-performance ferroelectric switch. In the present invention, Na 0.5 Bi 0.5 TiO 3 Ferroelectric ceramics and their solid solution materials are used as pulse power switch substrates in ferroelectric switches, and have achieved good results and have good application prospects. Background technique [0002] Pulsed power technology refers to an electro-physical technology that slowly stores energy, and then quickly compresses, converts or directly releases the energy to the load. Based on the advantages of pulsed power technology, it has a wide range of applications in industrial fields such as plasma physics and controlled nuclear fusion research, high-power lasers, high-power microwaves, electromagnetic pulses, and electromagnetic emission. In recent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/475C04B35/622C04B41/88H03K17/51
CPCC04B35/475C04B35/622C04B41/009C04B41/5116C04B41/88C04B2235/3222C04B2235/3229C04B2235/3284H03K17/51
Inventor 高志鹏谷伟韩旭高刘德王海晏谢庆海李兴
Owner INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS