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Ternary ferroelectric solid solution lead niobate ytterbate-lead zinc niobate-lead titanate

A technology of lead ytterbium ytterbium and lead niobate, applied in the field of functional materials, can solve problems such as the reduction of ceramic properties, achieve uniform and dense crystal grains, high sintering quality, and inhibit the formation of pyrochlore phase.

Inactive Publication Date: 2013-06-26
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these systems exhibit excellent performance near the MPB, as the PZN content increases, the introduced pyrochlore phase increases and the performance of the ceramic decreases accordingly

Method used

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  • Ternary ferroelectric solid solution lead niobate ytterbate-lead zinc niobate-lead titanate
  • Ternary ferroelectric solid solution lead niobate ytterbate-lead zinc niobate-lead titanate
  • Ternary ferroelectric solid solution lead niobate ytterbate-lead zinc niobate-lead titanate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The PYN-PZN-PT ternary ferroelectric solid solution was prepared by the optimized B-site ion oxide co-fired sintering process. Specific steps are as follows:

[0022] a) Change Yb 2 O 3 , ZnO and Nb 2 O 5 According to the stoichiometric ratio of the chemical formula, weigh, mix and grind; co-fire to obtain a precursor mixture, the synthesis condition is 1000oC for 4 hours;

[0023] b) Combine the obtained precursor mixture with PbO, TiO 2 Weigh, mix and grind according to the stoichiometric ratio, calcinate at 850oC, and hold for 5 hours to obtain a pre-synthetic powder with a perovskite structure;

[0024] c) Grind and dry the obtained pre-synthetic powder, add 5w% PVA; discharge at 500oC, heat preservation for 2 hours; after the discharge is completed, cold isostatic pressure, 200MPa, pressure hold for 2min

[0025] d) Place the sample completed by cold isostatic pressing in a closed crucible and sinter it in the pre-synthesized powder of the same composition. The sintering ...

Embodiment 2

[0030] The structure and performance of the PYN-PZN-PT ternary ceramic in Example 1 were tested.

[0031] a) Grind and grind the ceramic sample into powder for X-ray powder diffraction, the specific test condition is room temperature, and the measurement angle range is 10-80 o , The step size used is 0.02 o (2θ), 8 per minute o . According to the obtained X-ray powder diffraction spectrum, the room temperature PYN-PZN-PT has a pure perovskite structure.

[0032] b) Break the ceramic sample, spray gold on the section, and observe the morphology of the ceramic section with a scanning electron microscope model JSM-6700F (JEOL).

[0033] c) Grind and polish the obtained PYN-PZN-PT ceramic sample, and coat both sides with silver paste; and polarize it at 120-150℃ and 40kV / cm DC electric field for 20 minutes, and then keep the electric field down to room temperature. And discharge for 24 hours. The prepared sample is used for the test of dielectric temperature spectrum. The temperature...

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Abstract

The invention relates to a ternary ferroelectric solid solution lead niobate ytterbate-lead zinc niobate-lead titanate. The chemical formula of the solid solution is xPb(Yb1 / 2Nb1 / 2)O3-yPb(Zn1 / 3Nb2 / 3)O3-(1-x-y)PbTiO3, wherein x is more than 0 and less than 1, and y is more than 0 and less than 1, and the solid solution belongs to a typical composite perovskite structure. The system is good in piezoelectric and electromechanical performance, high in Curie temperature and good in thermal stability, and has a wide application prospect.

Description

Technical field [0001] The invention relates to a new type of ferroelectric / piezoelectric ceramic material. Specifically, the present invention relates to a piezoelectric ceramic material with a quasi-homotype phase boundary and a relatively high Curie temperature. Lead ytterbium niobate-lead niobate zincate-lead titanate xPb(Yb 1 / 2 Nb 1 / 2 )O 3 -yPb(Zn 1 / 3 Nb 2 / 3 )O 3 -(1-x-y)PbTiO 3 , Abbreviated as PYN-PZN-PT, as well as the preparation method, structure and piezoelectric, ferroelectric, and dielectric 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 and an important part of information functional ceramics. It has been widely used in many fields of social production, especially in the field of ultrasound and electronic science and technology. Piezoelectric ceramic materials have gradually occupied an absolute dominant position...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622
Inventor 艾辽东龙西法
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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