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Lead indium niobate-lead magnesium niobate-lead titanate relaxor ferroelectric textured ceramic with high electrical properties and preparation method and application of textured ceramic

A technology of electrical properties, lead niobate indium oxide, applied in the field of piezoelectric ferroelectric materials, can solve the problems of poor mechanical properties, low electrical properties, poor stability of electrical properties, etc., and achieve the effect of superior performance and high electrical properties

Active Publication Date: 2015-10-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problem of poor stability of electrical properties caused by segregation of the existing PIN-PMN-PT single crystal components, limited available crystal size, poor mechanical properties, low service life, long growth cycle, and high cost of preparing single crystals , and the grains in the PIN-PMN-PT base ceramics are randomly distributed into any orientation, so that the performance of each direction partially cancels out, and the overall electrical performance is low, and the lead indium niobate-lead magnesium niobate that provides high electrical performance -Lead titanate relaxor ferroelectric textured ceramics and its preparation method and application

Method used

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  • Lead indium niobate-lead magnesium niobate-lead titanate relaxor ferroelectric textured ceramic with high electrical properties and preparation method and application of textured ceramic
  • Lead indium niobate-lead magnesium niobate-lead titanate relaxor ferroelectric textured ceramic with high electrical properties and preparation method and application of textured ceramic
  • Lead indium niobate-lead magnesium niobate-lead titanate relaxor ferroelectric textured ceramic with high electrical properties and preparation method and application of textured ceramic

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specific Embodiment approach 1

[0036] Embodiment 1: The general chemical formula of the high electrical performance lead indium niobate-lead magnesium niobate-lead titanate relaxor ferroelectric textured ceramics described in this embodiment is xPb(In 1 / 2 Nb 1 / 2 )O 3 -(1-x-y)Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -yPbTiO 3 -avol.% BaTiO 3 , wherein, 0.16≤x≤0.36, 0.26≤y≤0.36, 0<a≤10; the high electrical performance lead indium niobate-lead magnesium niobate-lead titanate relaxor ferroelectric textured ceramic along [ The degree of orientation in the 001] direction is over 90%, the trigonal-tetragonal phase transition temperature is over 120°C, the Curie temperature is over 200°C, and the piezoelectric constant is over 1550pC / N.

[0037] In this embodiment, xPb(In 1 / 2 Nb 1 / 2 )O 3 -(1-x-y)Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -yPbTiO 3 -avol.% BaTiO 3 , where, 0.16≤x≤0.36, 0.26≤y≤0.36, 01 / 2 Nb 1 / 2 )O 3 -(1-x-y)Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -yPbTiO 3 When the volume is 100 parts, BaTiO 3 The volume is a part.

[0038] The benefic...

specific Embodiment approach 2

[0040] Specific implementation mode two: according to figure 1 Specifically explaining this embodiment, the preparation method of the lead indium niobate-lead magnesium niobate-lead titanate relaxor ferroelectric texture ceramic with high electrical performance described in this embodiment is completed according to the following steps:

[0041] 1. Preparation of pure-phase xPb(In 1 / 2 Nb 1 / 2 )O 3 -(1-x-y)Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -yPbTiO 3 Fine crystal matrix powder, where 0.16≤x≤0.36, 0.26≤y≤0.36:

[0042] ①. The pure phase of MgNb was synthesized by solid phase reaction method 2 o 6 Precursor powder and pure phase InNbO 4 Precursor powder;

[0043] ②, MgNb in pure phase 2 o 6 Precursor powder and pure phase InNbO 4 The precursor powder was used as the raw material, and the pure phase xPb(In 1 / 2 Nb 1 / 2 )O 3 -(1-x-y)Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -yPbTiO 3 Fine crystal matrix powder, where 0.16≤x≤0.36, 0.26≤y≤0.36;

[0044] 2. Preparation of phase-pure BaTiO by local ch...

specific Embodiment approach 3

[0061] Specific embodiment three: the difference between this embodiment and specific embodiment two is: step 1. adopts solid phase reaction method to synthesize MgNb of pure phase respectively 2 o 6 Precursor powder and pure phase InNbO 4 Precursor powder is specifically carried out according to the following steps:

[0062] According to the chemical formula MgNb 2 o 6 The ratio of MgO nano raw materials and Nb 2 o 5 Nano material, the MgO nano material and Nb that will be weighed 2 o 5 The nano raw materials are mixed and placed in a polyethylene ball milling tank, using absolute ethanol as the ball milling medium, agate balls as the balls, and milling for 24h to 72h to obtain the wet material A after ball milling, and place the wet material A after ball milling at a temperature of Dry in an oven at 50°C to 100°C to obtain a dry block A, put the dry block A in an agate mortar and grind to obtain powder A, then put the powder A in a corundum crucible, at a temperature ...

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Abstract

The invention discloses a lead indium niobate-lead magnesium niobate-lead titanate relaxor ferroelectric textured ceramic with high electrical properties and a preparation method and application of the textured ceramic and relates to the field of piezoelectric and ferroelectric materials. The invention aims to solve the problem that an existing PIN-PMN-PT single crystal component is segregated, the available size is limited, the mechanical property is poor, and the PIN-PMN-PT ceramic is low in electric property. The chemical formula is xPb(In<1 / 2>Nb<1 / 2>)O<3>-(1-x-y)Pb(Mg<1 / 3>Nb<2 / 3>)O<3>-yPbTiO<3>-avol.%BaTiO<3>. The method comprises the steps: preparing PIN-PMN-PT fine crystal matrix powder by a two-step synthetic method; preparing a BaTiO<3> sheet micro-crystal template by virtue of a local chemical micro-crystal substitution method; and preparing the PIN-PMN-PT-based ternary relaxor ferroelectric textured ceramic orientated along [001] height by adopting a template grain orientated growth technology. The ceramic is applied to the field of ultrasonic transducers, piezoelectric drivers and piezoelectric sensors.

Description

technical field [0001] The invention relates to the field of piezoelectric ferroelectric materials. Background technique [0002] Relaxor-based ferroelectric materials are an important class of multifunctional materials with fierce international competition. Utilizing the very unique special properties of force, heat, electricity, light, sound and chemistry of relaxor-based ferroelectric materials, various types of information can be detected, converted, processed and stored. Field applications are very common, such as industrial non-destructive detection, medical ultrasonic imaging, underwater sonar, solid-state large displacement piezoelectric actuators, etc. In recent years, the rapid development of global electronic information technology has put forward higher requirements for information functional materials and devices, making the development of a new generation of high-performance relaxor-based ferroelectric materials an urgent international task with great social a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/499C04B35/64H10N30/853
Inventor 常云飞吴杰孙媛杨彬曹文武
Owner HARBIN INST OF TECH
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