Niobium sodium potassium antimonate-potassium sodium bismuth zirconate leadless piezoelectric ceramic with high piezoelectric constant and preparation method thereof

A technology of sodium potassium niobate antimonate and sodium potassium bismuth zirconate is applied in the field of perovskite structure and environment coordinated piezoelectric ceramics, which can solve the problems of low piezoelectric constant and difficult to surpass piezoelectric constant, and achieves easy operation and low price. Inexpensive, the effect of promoting the practical process

Inactive Publication Date: 2014-01-01
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lead-free piezoelectric systems of these three types of structures have their own advantages and disadvantages. For example, although the tungsten bronze structure and the bismuth layered structure have a high Curie temperature, their p...

Method used

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  • Niobium sodium potassium antimonate-potassium sodium bismuth zirconate leadless piezoelectric ceramic with high piezoelectric constant and preparation method thereof
  • Niobium sodium potassium antimonate-potassium sodium bismuth zirconate leadless piezoelectric ceramic with high piezoelectric constant and preparation method thereof
  • Niobium sodium potassium antimonate-potassium sodium bismuth zirconate leadless piezoelectric ceramic with high piezoelectric constant and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] According to the general formula (1-x)(K 1-y Na y )(Nb 1-z Sb z )O 3 +xBi 0.5 (Na 1-u K u ) 0.5 ZrO 3 The content of potassium sodium niobate antimonate-bismuth sodium potassium zirconate binary system perovskite type lead-free piezoelectric ceramics is used for batching;

[0031] When x=0, y=0.52, z=0.05, u=0.18,

[0032] Its formula one is: (K 0.48 Na 0.52 )(Nb 0.95 Sb 0.05 )O 3 ;

[0033] When x=0.03, y=0.52, z=0.05, u=0.18,

[0034] Its formula two is: 0.97 (K 0.48 Na 0.52 )(Nb 0.95 Sb 0.05 )O 3 -0.03Bi 0.5 (Na 0.82 K 0.18 ) 0.5 ZrO 3 ;

[0035] When x=0.04, y=0.52, z=0.05, u=0.18,

[0036] Its formula three is: 0.96 (K 0.48 Na 0.52 )(Nb 0.95 Sb 0.05 )O 3 -0.04Bi 0.5 (Na 0.82 K 0.18 ) 0.5 ZrO 3 ;

[0037] When x=0.05, y=0.52, z=0.05, u=0.18,

[0038] Its formula four is: 0.95 (K 0.48 Na 0.52 )(Nb 0.95 Sb 0.05 )O 3 -0.05Bi 0.5 (Na 0.82 K 0.18 ) 0.5 ZrO 3 .

[0039] Preparation of formula one: with analytically pure Na...

Embodiment 2

[0046] According to the general formula (1-x)(K 1-y Na y )(Nb 1-z Sb z )O 3 +xBi 0.5 (Na 1-u K u ) 0.5 ZrO 3 The content of potassium sodium niobate antimonate-bismuth sodium potassium zirconate binary system perovskite type lead-free piezoelectric ceramics is used for batching;

[0047] When x=0.04, y=0.40, z=0.05, u=0.18,

[0048] Its formula one is: 0.96 (K 0.60 Na 0.40 )(Nb 0.95 Sb 0.05 )O 3 +0.04Bi 0.5 (Na 0.82 K 0.18 ) 0.5 ZrO 3 ;

[0049] When x=0.04, y=0.44, z=0.05, u=0.18,

[0050]Its formula two is: 0.96 (K 0.56 Na 0.44 )(Nb 0.95 Sb 0.05 )O 3 +0.04Bi 0.5 (Na 0.82 K 0.18 ) 0.5 ZrO 3 ;

[0051] When x=0.04, y=0.48, z=0.05, u=0.18,

[0052] Its formula three is: 0.96 (K 0.52 Na 0.48 )(Nb 0.95 Sb 0.05 )O 3 +0.04Bi 0.5 (Na 0.82 K 0.18 ) 0.5 ZrO 3 ;

[0053] When x=0.04, y=0.52, z=0.05, u=0.18,

[0054] Its formula four is: 0.96 (K 0.48 Na 0.52 )(Nb 0.95 Sb 0.05 )O 3 +0.04Bi 0.5 (Na 0.82 K 0.18 ) 0.5 ZrO 3 ;

[0055] W...

Embodiment 3

[0069] According to the general formula (1-x)(K 1-y Na y )(Nb 1-z Sb z )O 3 +xBi 0.5 (Na 1-u K u ) 0.5 ZrO 3 The content of potassium sodium niobate antimonate-bismuth sodium potassium zirconate binary system perovskite type lead-free piezoelectric ceramics is used for batching;

[0070] When x=0.04, y=0.52, z=0.02, u=0.18,

[0071] Its formula one is: 0.96 (K 0.48 Na 0.52 )(Nb 0.98 Sb 0.02 )O 3 +0.04Bi 0.5 (Na 0.82 K 0.18 ) 0.5 ZrO 3 ;

[0072] When x=0.04, y=0.52, z=0.03, u=0.18,

[0073] Its formula two is: 0.96 (K 0.48 Na 0.52 )(Nb 0.97 Sb 0.03 )O 3 +0.04Bi 0.5 (Na 0.82 K 0.18 ) 0.5 ZrO 3 ;

[0074] When x=0.04, y=0.52, z=0.04, u=0.18,

[0075] Its formula three is: 0.96 (K 0.48 Na 0.52 )(Nb 0.96 Sb 0.04 )O 3 +0.04Bi 0.5 (Na 0.82 K 0.18 ) 0.5 ZrO 3 ;

[0076] When x=0.04, y=0.52, z=0.05, u=0.18,

[0077] Its formula four is: 0.96 (K 0.48 Na 0.52 )(Nb 0.95 Sb 0.05 )O 3 +0.04Bi 0.5 (Na 0.82 K 0.18 ) 0.5 ZrO 3 ;

[0078] ...

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Abstract

The invention relates to niobium sodium potassium antimonate-potassium sodium bismuth zirconate leadless piezoelectric ceramic with a high piezoelectric constant and a preparation method thereof, which belong to the field of environmental coordinative piezoelectric ceramic of perovskite structures. The leadless piezoelectric ceramic with a general formula of (1-x) (K1-yNay) (Nb1-zSbz) O3 + xBi0.5 (Na1-uKu) 0.5ZrO3 is prepared by a traditional solid state sintering method, wherein in the formula, x is not smaller than 0 while not larger than 0.05, y is not smaller than 0.40 while not larger than 0.68, z is not smaller than 0.02 while not larger than 0.06, and u is not smaller than 0 while not larger than 1; the d33 of the leadless piezoelectric ceramic disclosed by the invention can be as high as 470 pC/N, kp can reach 47%, and Tc is as high as 313 DEG C. Devices prepared by the ceramic can work under high temperatures, so that the ceramic has a practical application value in high-temperature electronic equipment; since the ceramic contains no expensive tantalum element, the price of the used raw materials is low, so that the cost is saved.

Description

technical field [0001] The present invention relates to a lead-free piezoelectric ceramic, in particular to a lead-free piezoelectric ceramic of potassium sodium niobate antimonate-bismuth sodium potassium zirconate binary system with a high piezoelectric constant and a preparation method thereof, belonging to a perovskite structure environment Harmonization in the field of piezoelectric ceramics. Background technique [0002] High-performance piezoelectric ceramics are important and widely used high-tech new materials with fierce international competition; such materials are closely related to national economic and social development, national security, and people's quality of life. High-performance piezoelectric ceramics have been widely used in electronic devices such as frequency control devices, transducers, sensors, and brakes. It has a pivotal position and role in high-tech fields related to national economy and national security, such as optoelectronic technology, i...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/622
Inventor 吴家刚王晓鹏程晓静肖定全朱建国
Owner SICHUAN UNIV
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