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New binary system k0.5bi0.5tio3–bimg0.5zr0.5o3 lead-free piezoelectric ceramic material and its preparation

A lead-free piezoelectric and ceramic technology, applied in the field of perovskite structure piezoelectric ceramics, can solve the problems of low depolarization temperature, limited practical application, difficult polarization, etc., and achieve the effect of improved piezoelectric performance

Inactive Publication Date: 2019-03-22
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the polarization of pure NBT ceramics is very difficult, there is a low depolarization temperature, and it is difficult to eliminate, which seriously limits its practical application

Method used

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  • New binary system k0.5bi0.5tio3–bimg0.5zr0.5o3 lead-free piezoelectric ceramic material and its preparation
  • New binary system k0.5bi0.5tio3–bimg0.5zr0.5o3 lead-free piezoelectric ceramic material and its preparation
  • New binary system k0.5bi0.5tio3–bimg0.5zr0.5o3 lead-free piezoelectric ceramic material and its preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] formula:

[0025] 0.99K 0.5 Bi 0.5 TiO 3 -0.01BiMg 0.5 Zr 0.5 o 3

[0026] Process: According to 0.99K 0.5 Bi 0.5 TiO 3 -0.01BiMg 0.5 Zr 0.5 o 3 The formula weighs the raw materials, the calcination temperature is 830°C, the molding pressure is 190MPa, and the sintering temperature is 1050°C; other process conditions are the same as those of the comparative example.

Embodiment 2

[0028] formula:

[0029] 0.97K 0.5 Bi 0.5 TiO 3 -0.03BiMg 0.5 Zr 0.5 o 3

[0030] Process: According to 0.97K 0.5 Bi 0.5 TiO 3 -0.03BiMg 0.5 Zr 0.5 o 3 Weigh the raw materials for the formula, the calcination temperature is 855°C, the molding pressure is 230MPa, and the sintering temperature is 1060°C; other process conditions are the same as those of the comparative example.

Embodiment 3

[0032] formula:

[0033] 0.95K 0.5 Bi 0.5 TiO 3 -0.05BiMg 0.5 Zr 0.5 o 3

[0034] Process: According to 0.95K 0.5 Bi 0.5 TiO 3 -0.05BiMg 0.5 Zr 0.5 o 3 The formula weighing raw material calcining temperature is 870°C, the molding pressure is 270MPa, and the sintering temperature is 1070°C; other process conditions are the same as those of the comparative example.

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Abstract

The invention discloses a novel binary K0.5Bi0.5TiO3-BiMg0.5Zr0.5O3 leadless piezoelectric ceramic material and preparation, and belongs to the field of piezoelectric ceramic of a perovskite structure. The material is expressed in a general formula (1-x)K0.5Bi0.5TiO3-xBiMg0.5Zr0.5O3 (x is greater than 0 and less than or equal to 0.08). The calcination temperature of the system is 800-900 DEG C, the briquetting pressure of the system is 150-300MPa, and the sintering temperature of the system is 1040-1080 DEG C. Improvement on piezoelectric properties of the KBT leadless piezoelectric ceramic material is successfully achieved, and near a morphotropic phase boundary, x is equal to 0.01, that is, the maximum d33=65pC / N can be achieved when composition is 0.99K0.5Bi0.5TiO3-0.01BiMg0.5Zr0.5O3.

Description

technical field [0001] The invention belongs to the field of perovskite structure piezoelectric ceramics, and relates to a new type of binary K with higher piezoelectric performance 0.5 Bi 0.5 TiO 3 based lead-free piezoelectric ceramic materials, specifically (1-x)K 0.5 Bi 0.5 TiO 3 -xBiMg 0.5 Zr 0.5 o 3 (0<x≤0.08) is a lead-free piezoelectric ceramic material composition and a preparation method thereof. technical background [0002] Piezoelectric ceramics refer to a functional ceramic material that has a piezoelectric effect and can convert mechanical energy and electrical energy into each other. As an electronic ceramic material, it is widely used to prepare electronic components such as sensors, piezoelectric transducers, and piezoelectric drivers. It has a wide range of applications and is closely related to our lives. Especially lead zirconate titanate Pb(Ti,Zr)O with excellent piezoelectric properties and high Curie temperature 3 After the successful dev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/475C04B35/622
CPCC04B35/475C04B35/622C04B2235/3201C04B2235/3206C04B2235/3232C04B2235/3244C04B2235/3298
Inventor 朱满康胡彬彬郭金键郑木鹏侯育冬刘晶冰王如志汪浩严辉
Owner BEIJING UNIV OF TECH
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