Ternary ferroelectric solid solution lead lutecium niobate-lead magnesium niobate-lead titanate

A technology of lead niobate lutetate and lead magnesium niobate, which is applied in the field of functional materials and can solve problems such as easy depolarization and lower piezoelectricity operating temperature range

Active Publication Date: 2013-04-03
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although PMNT and PZNT have these excellent properties, their relatively low Curie temperature and lower trigonal and tetragonal ph...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0012] Example 1: Prepared by secondary synthesis method, specific steps:

[0013] a) Magnesium oxide (MgO) and niobium oxide (Nb 2 o 5 ) was weighed according to the stoichiometric ratio (in which MgO was over 2%), and calcined at 1150°C for 2h to obtain MgNb 2 o 6 Powder;

[0014] b) Lutetium oxide (Lu 2 o 3 ) and niobium oxide are weighed according to the stoichiometric ratio (where Lu 2 o 3 Excess 1%) was calcined at 1150°C for 2h to obtain LuNbO 4 Precursor;

[0015] c) MgNb 2 o 6 , LuNbO 4 , PbO and TiO 2 (wherein the PbO excess is 2%) After mixing, calcining at 850°C for 4h to obtain xPb(Lu 1 / 2 Nb 1 / 2 )O3-yPb(Mg 1 / 3 Nb 2 / 3 )O 3 - (1-x-y)PbTiO 3 pre-synthesized powder;

[0016] d) ball milling and drying the pre-synthesized powder, adding 5wt% PVA, debinding at 300-500°C for 1-3 hours;

[0017] e) Sintering at 1050°C-1100°C for 3 hours to obtain xPb(Lu 1 / 2 Nb 1 / 2 )O3-yPb(Mg 1 / 3 Nb 2 / 3 )O 3 -(1-x-y)PbTiO 3 Ceramic samples.

[0018] The samples ...

example 2

[0019] Example 2: Determination of the structure of ceramics.

[0020] The structure of the ceramics was determined by X-ray powder diffraction. The instrument used is Japan RIGAKU-DMAX2500 powder diffractometer (Cu target, λ = 0.154056 nm, graphite monochromator), the specific test conditions are at room temperature, the measurement angle range is 10-80 o , with a step size of 0.02 o (2θ), 7 per minute o .

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PUM

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Abstract

The invention relates to a ferroelectric solid solution lead lutecium niobate-lead magnesium niobate-lead titanate and a preparation method and application thereof. Such a solid solution system is determined to be a perovskite structure through X-ray powder diffraction, and ferroelectricity, dielectricity and piezo-electricity of the solid solution system are analyzed by using ferroelectric, dielectric and piezoelectric measurement. Based on measurement and analysis of the structure and dielectricity of the solid solution system, MPB composition of the ternary ferroelectric solid solution system is obtained. The system has good piezoelectric and electromechanical properties, a high Curie temperature, good thermal stability and wide application prospects.

Description

technical field [0001] The invention relates to a novel ferroelectric / piezoelectric ceramic material. Specifically, the present invention relates to a ferroelectric material xPb(Lu 1 / 2 Nb 1 / 2 )O 3 -yPb(Mg 1 / 3 Nb 2 / 3 )O 3 -(1-x-y)PbTiO 3 , abbreviated as PLN-PMN-PT or PLMNT, and the preparation method, structure and electrical properties of ceramics; it belongs to the field of functional materials. Background technique [0002] Ferroelectric / piezoelectric ceramic material is a kind of polycrystal with piezoelectric properties, which is an important part of information functional ceramics. It has the advantages of high electromechanical coupling coefficient, low price, and easy mass production. It has been widely used in various fields of social production, especially in the field of ultrasound and electronic science and technology. Piezoelectric ceramic materials have gradually been dominated by absolute advantages. status. PZT (Pb(Zr 1-x Ti x )O 3 ) Ceramic is a ...

Claims

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Application Information

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IPC IPC(8): C04B35/50C04B35/499C04B35/472C04B35/622H01L41/187
Inventor 刘颖龙西法沈东全李修芝王祖建何超
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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