Ternary system lead scandium niobate-lead magnesium niobate-lead titanate ceramic and preparation method thereof

A technology of lead scandium niobate and lead magnesium niobate, applied in the field of inorganic non-metallic functional materials, can solve the problems of low phase transition temperature, poor performance consistency, low coercive field, etc., and achieve the effect of high sensitivity

Inactive Publication Date: 2020-02-28
XIAN TECHNOLOGICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the invention is to provide a ternary lead scandate-lead magnesium niobate-lead titanate ceramic and its preparation method to solve the problem of the low triangular-tetragonal phase transition temperature of piezoelectric materials used in current medical ultrasonic transducers, Problems such as low persistent field and poor performance consistency

Method used

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  • Ternary system lead scandium niobate-lead magnesium niobate-lead titanate ceramic and preparation method thereof
  • Ternary system lead scandium niobate-lead magnesium niobate-lead titanate ceramic and preparation method thereof
  • Ternary system lead scandium niobate-lead magnesium niobate-lead titanate ceramic and preparation method thereof

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Effect test

Embodiment 1

[0031] A ternary lead scandate-lead magnesium niobate-lead titanate ceramics, the chemical formula of which is: 0.15Pb(Sc 1 / 2 Nb 1 / 2 )O 3 -0.48Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -0.37PbTiO 3 .

[0032] The preparation method of the ceramic material comprises the following steps:

[0033] (1) with analytically pure Sc 2 o 3 and Nb 2 o 5 The powder is used as the raw material, and the precursor ScNbO is synthesized by the solid state reaction method 4 ; to analyze pure MgO and Nb 2 o 5 The powder is used as the raw material, and the precursor MgNb is synthesized by the solid state reaction method 2 o 6 ;

[0034] (2) with analytically pure PbO, TiO 2 , ScNbO 4 and MgNb 2 o 6 Powder is the raw material, according to the chemical formula 0.15Pb(Sc 1 / 2 Nb 1 / 2 )O 3 -0.48Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -0.37PbTiO 3 Weigh raw materials;

[0035] (3) Put the powder weighed in step (2) into a ball mill jar, use absolute ethanol as the medium, ZrO 2 The ball is a grinding ball, wh...

Embodiment 2

[0049] A ternary lead scandate-lead magnesium niobate-lead titanate ceramics, the chemical formula of which is: 0.15Pb(Sc 1 / 2 Nb 1 / 2 )O 3 -0.49Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -0.36PbTiO 3 .

[0050] The preparation method of the ceramic material comprises the following steps:

[0051] (1) with analytically pure Sc 2 o 3 and Nb 2 o 5 The powder is used as the raw material, and the precursor ScNbO is synthesized by the solid state reaction method 4 ; to analyze pure MgO and Nb 2 o 5 The powder is used as the raw material, and the precursor MgNb is synthesized by the solid state reaction method 2 o 6 ;

[0052] (2) with analytically pure PbO, TiO 2 , ScNbO 4 and MgNb 2 o 6 Powder is the raw material, according to the chemical formula 0.15Pb(Sc 1 / 2 Nb 1 / 2 )O 3 -0.48Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -0.37PbTiO 3 Weigh raw materials;

[0053] (3) Put the powder weighed in step (2) into a ball mill jar, use absolute ethanol as the medium, ZrO 2 The ball is a grinding ball, wh...

Embodiment 3

[0064] A ternary lead scandate-lead magnesium niobate-lead titanate ceramics, the chemical formula of which is: 0.15Pb(Sc 1 / 2 Nb 1 / 2 )O 3 -0.47Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -0.38PbTiO 3 .

[0065] The preparation method of the ceramic material comprises the following steps:

[0066] (1) with analytically pure Sc 2 o 3 and Nb 2 o 5 The powder is used as the raw material, and the precursor ScNbO is synthesized by the solid state reaction method 4 ; to analyze pure MgO and Nb 2 o 5 The powder is used as the raw material, and the precursor MgNb is synthesized by the solid state reaction method 2 o 6 ;

[0067] (2) with analytically pure PbO, TiO 2 , ScNbO 4 and MgNb 2 o 6 Powder is the raw material, according to the chemical formula 0.15Pb(Sc 1 / 2 Nb 1 / 2 )O 3 -0.47Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -0.38PbTiO 3 Weigh raw materials;

[0068] (3) Put the powder weighed in step (2) into a ball mill jar, use absolute ethanol as the medium, ZrO 2 The ball is a grinding ball, wh...

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Abstract

The invention relates to a ternary system lead scandium niobate-lead magnesium niobate-lead titanate ceramic and a preparation method thereof. The chemical formula of the ceramic material is xPb(Sc1/2Nb1/2)O3-yPb(Mg1/3Nb2/3)O3-zPbTiO3, wherein x is greater than or equal to 0.1 mol and less than or equal to 0.28 mol, y is greater than or equal to 0.32 mol and less than or equal to 0.57 mol, z is greater than or equal to 0.33 mol and less than or equal to 0.40 mol, and the sum of x, y and z is 1. The preparation method provided by the invention adopts a traditional two-step solid-phase reactionmethod for synthesis. The ceramic material has piezoelectric constant d33 of 720 pC/N, the radial electromechanical coupling coefficient kp of about 0.65, thickness electromechanical coupling coefficient kt of 0.6, the trigonal-tetragonal phase transition temperature Trt of 90 DEG C to 150 DEG C, the Curie temperature Tc of larger than 170 DEG C and the coercive field of 10 kV/mm, and can meet therequirements of an ultrasonic transducer for broadband, high sensitivity, temperature, electric field stability and performance consistency.

Description

technical field [0001] The invention relates to the field of inorganic non-metal functional materials, in particular to a ternary lead scandate-lead magnesium niobate-lead titanate ceramic and a preparation method thereof, which are suitable for making high-performance ultrasonic and underwater acoustic transducers. Background technique [0002] Ultrasonic testing, as a non-destructive testing technology, has been widely used in many fields such as medical diagnosis, non-destructive testing, and underwater acoustic sonar. In the field of medical ultrasound, the ultrasonic diagnostic system is a device that sends and receives ultrasonic signals and processes ultrasonic information, and has become an indispensable device for doctors to diagnose diseases. The core component of the ultrasonic diagnostic system is the ultrasonic transducer, whose performance and quality directly affect the performance of the entire system. Medical ultrasonic transducers have the following charac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/472C04B35/499C04B35/622
CPCC04B35/472C04B35/499C04B35/622C04B2235/3206C04B2235/3224C04B2235/3234
Inventor 郭菲菲惠增哲龙伟李晓娟方频阳周宏桥贾博周峰峰
Owner XIAN TECHNOLOGICAL UNIV
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