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A linear electrostrain lead-free piezoelectric ceramic material and its preparation method

A technology of lead-free piezoelectric and ceramic materials, which is applied in the field of electronic ceramic materials, can solve the problems of limited research on lead-free piezoelectric ceramic materials, achieve excellent linear electric strain response characteristics, simple composition and process steps, and good repeatability Effect

Inactive Publication Date: 2017-03-08
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research on lead-free piezoelectric ceramic materials with performance comparable to PZT8 ceramics is currently limited.

Method used

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  • A linear electrostrain lead-free piezoelectric ceramic material and its preparation method
  • A linear electrostrain lead-free piezoelectric ceramic material and its preparation method

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preparation example Construction

[0027] The preparation method of the barium titanate-based linear electrostrain lead-free piezoelectric ceramic material has the following steps:

[0028] (1) weighing according to the chemical formula Ba 0.85 Ca 0.15 (Zr 0.1 Ti 0.9 ) 1-x Fe x o 3 The proportion of each element in the weighing raw material BaCO 3 , CaCO 3 、TiO 2 , ZrO 2 and Fe 2 o 3 ; Wherein, x is 0.015~0.025;

[0029] (2) Ball milling Mix the weighed raw materials and put them into a ball milling tank, add the ball milling solvent isopropanol and zirconia balls, mill for 6 hours, the ball milling speed is 250 rpm, and then put the mixture into an oven for drying at 80°C Dry, grind in a mortar, and pass through a 60-mesh sieve;

[0030] (3) Pre-burning Put the ground and sieved powder in the step (2) into the crucible, cover and seal: pre-fire in a muffle furnace at 1250°C, keep warm for 4 hours, and cool down to room temperature naturally. baked;

[0031] (4) Secondary ball milling The powder ...

Embodiment 1

[0038]A method for preparing a linear electrostrain lead-free piezoelectric ceramic material, comprising the following steps:

[0039] 1) According to the chemical formula Ba 0.85 Ca 0.15 (Zr 0.1 Ti 0.9 ) 1-x Fe x o 3 The ratio of each element in the formula, weigh the raw material BaCO 3 , CaCO 3 、TiO 2 , ZrO 2 and Fe 2 o 3 ; Wherein, x=0.02;

[0040] 2) After mixing the weighed raw materials, perform ball milling, drying and sieving, and heat the sieved powder from room temperature to 1200 °C at a heating rate of 3 °C / min, keep it warm for 4 hours, and then cool it; The ball milling method is to put the weighed raw materials into a ball milling tank, add isopropanol and zirconia balls, and mill for 6 hours at a ball milling speed of 300r / min; dry the ball milled mixture at 80°C, and then grind it , and passed through a 60-mesh sieve;

[0041] 3) Grind the pre-calcined powder in step 2) in a mortar and pass through a 60-mesh sieve, put it into a ball mill jar, a...

Embodiment 2

[0046] A method for preparing a linear electrostrain lead-free piezoelectric ceramic material, comprising the following steps:

[0047] 1) According to the chemical formula Ba 0.85 Ca 0.15 (Zr 0.1 Ti 0.9 ) 1-x Fe x o 3 The ratio of each element in the formula, weigh the raw material BaCO 3 , CaCO 3 、TiO 2 , ZrO 2 and Fe 2 o 3 ; Wherein, x=0.015;

[0048] 2) After mixing the weighed raw materials, perform ball milling, drying and sieving, and heat the sieved powder from room temperature to 1200 °C at a heating rate of 4 °C / min, keep it warm for 5 hours, and then cool it down; Ball milling is to place the weighed raw materials in a ball milling tank, add isopropanol and zirconia balls, and mill for 8 hours at a ball milling speed of 300r / min; dry the ball milled mixture at 650°C, and then grind it. And pass through a 60-mesh sieve;

[0049] 3) Grind the pre-calcined powder in step 2) in a mortar and pass through a 60-mesh sieve, put it into a ball mill jar, add iso...

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Abstract

The invention discloses a linear electrostrictive-strain leadless piezoelectric ceramic material and a preparation method thereof and belongs to the technical field of electronic ceramic materials. The piezoelectric ceramic material is represented as the following component expression formula: Ba<0.85>Ca<0.15>(Zr<0.1>Ti<0.9>)<1-x>Fe<x>O<3>, wherein x=0.015-0.025. The piezoelectric ceramic material is prepared in a manner of solid-phase synthesis, wherein barium calcium zirconate titanate (BCZT) is obtained with barium titanate (BT) as a base body and zirconium and calcium as doping agents. On the basis of the BCZT, Fe2O3 is added to obtain the piezoelectric ceramic material of which the Curie temperature is about room temperature, has a significant relaxation characteristic and has an excellent linear electrostrictive-strain response characteristic. The preparation method is simple in raw mateiral components and technical processes, is easy to carry out, is good in repeatability and is high in rate of finished products.

Description

technical field [0001] The invention belongs to the technical field of electronic ceramic materials, and in particular relates to a linear electric strain lead-free piezoelectric ceramic material and a preparation method thereof. Background technique [0002] Based on the piezoelectric effect, we can convert electrical signals and mechanical signals freely. The actuator (actuator) is a mobile piezoelectric device based on the application of the inverse piezoelectric effect. Through the inverse piezoelectric effect, we can obtain the required tiny displacement by controlling the magnitude of the driving voltage signal, and the displacement is usually between tens and hundreds of nanometers. Most of the piezoelectric ceramics currently used are ferroelectric materials, that is, the ferroelectric domains in them can be flipped under the action of an external electric field. The inversion of domain walls inevitably leads to hysteresis on the electric field-strain curve. This ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/49C04B35/622
Inventor 郭润平靳立李飞魏晓勇
Owner XI AN JIAOTONG UNIV
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