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Copper oxide doped potassium-sodium niobate electrostrictive strain ceramic and preparation method thereof

A potassium sodium niobate and electro-strain technology, applied in the field of piezoelectric ceramics, can solve the problems of KNN ceramic density, microstructure and electrical properties, and achieve excellent electro-strain performance, low production cost and high purity. Effect

Inactive Publication Date: 2015-04-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the doping of CuO will also have a great influence on the density, microstructure and electrical properties of KNN ceramics.

Method used

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  • Copper oxide doped potassium-sodium niobate electrostrictive strain ceramic and preparation method thereof
  • Copper oxide doped potassium-sodium niobate electrostrictive strain ceramic and preparation method thereof
  • Copper oxide doped potassium-sodium niobate electrostrictive strain ceramic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) According to chemical formula (1-x) (K 0.48 Na 0.52 NbO 3 )-xCuO takes the value of x as 0.01, calculates the proportioning ratio of various raw materials, and weighs 3.284 grams of K 2 CO 3 , 2.728 g Na 2 CO 3 , 13.157 g Nb 2 o 5 and 0.08 grams of CuO, mix well;

[0049] (2) Ball milling: adopt wet ball milling in mechanical processing, put ingredients, absolute ethanol and grinding balls into the ball milling tank, wherein, ingredients: ball: absolute ethanol is 1:2:1 by mass ratio, in each Minutes are ball milled for 6 hours at a rotating speed of 800 rpm to obtain the ball-milled mixture, which is placed in an oven to dry;

[0050] (3) Pre-sintering: put the mixture obtained in step (2) into an alumina crucible first, then put it into a muffle furnace, heat up to 850°C at a rate of 10°C per minute, heat-preserve and calcinate for 3 hours, and then cool naturally to room temperature, place the obtained pre-calcined powder in a ball mill for secondary bal...

Embodiment 2

[0064] (1) According to chemical formula (1-x) (K 0.48 Na 0.52 NbO 3 )-xCuO takes the value of x as 0.02, calculates the proportioning ratio of various raw materials, and weighs 3.250 grams of K 2 CO 3 , 2.700 g Na 2 CO 3 , 13.024 g Nb 2 o 5 and 0.16 grams of CuO, mix well;

[0065] (2) Ball milling: adopt wet ball milling in mechanical processing, put ingredients, absolute ethanol and grinding balls into the ball milling tank, wherein, ingredients: ball: absolute ethanol is 1:2:1 by mass ratio, in each Minutes are ball milled for 6 hours at a rotating speed of 800 rpm to obtain the ball-milled mixture, which is placed in an oven to dry;

[0066] (3) Pre-sintering: put the mixture obtained in step (2) into an alumina crucible first, then put it into a muffle furnace, heat up to 850°C at a rate of 10°C per minute, heat-preserve and calcinate for 3 hours, and then cool naturally to room temperature, place the obtained pre-calcined powder in a ball mill for secondary bal...

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Abstract

The invention discloses a copper oxide doped potassium-sodium niobate electrostrictive strain ceramic and a preparation method thereof. The copper oxide doped potassium-sodium niobate electrostrictive strain ceramic comprises the following raw material components by mole percent: (1-x)(K0.48Na0.52NbO3)-xCuO, wherein x is more than or equal to 0 and less than or equal to 0.02. The copper oxide doped potassium-sodium niobate electrostrictive strain ceramic disclosed by the invention has a main crystal phase in a perovskite structure, has excellent electrostrictive strain property, has large strain of 0.12% at 4 kV per millimeter, can achieve the strain by 0.19% at 6 kV per millimeter, has high Smax / Emax of 300 pm / V and 310 pm / V respectively in single-pole and double-pole electric fields and still keeps the piezoelectric coefficient d33 at 80 pC / N. The copper oxide doped potassium-sodium niobate electrostrictive strain ceramic disclosed by the invention is low in production cost and simple in process and is a ceramic system which has development prospect and is taken as a driver or a sensor.

Description

technical field [0001] The invention relates to a piezoelectric ceramic. In particular, it relates to a cupric oxide-doped sodium potassium niobate electric strain ceramic and a preparation method thereof. Background technique [0002] Piezoelectric materials are a very important class of functional materials, which can realize mutual conversion between mechanical energy and electrical energy, so they are widely used in sensors, drivers, ultrasonic transducers, resonators, filters, buzzers and electronic igniters, etc. Electronic components have a wide range of applications. [0003] Piezoelectric materials include piezoelectric single crystals, piezoelectric ceramics, piezoelectric polymer materials, and composite materials. Among them, piezoelectric ceramics have many advantages such as simple preparation process, low cost, excellent performance and adjustable components, and have occupied the main market of piezoelectric materials for decades. Due to the large electros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622
Inventor 戴叶婧刘振尹东升
Owner TIANJIN UNIV