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Composite piezoelectric ceramic and preparation method thereof

A technology of piezoelectric ceramics and composite materials, applied in the field of piezoelectric ceramic materials, can solve problems such as unstable chemical properties, environmental pollution, and large dielectric loss, so as to improve electromechanical coupling efficiency, simplify the preparation process, and improve piezoelectric activity Effect

Inactive Publication Date: 2017-12-22
BAOJI CHANGDA ELECTRICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the practical piezoelectric ceramic materials now contain lead-oxygen compounds, which cause certain pollution to the environment during use or production. However, piezoelectric ceramics that do not contain lead have large dielectric loss and unstable chemical properties during use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] A preparation method of composite piezoelectric ceramics, specifically implemented according to the following steps:

[0029] Step 1. Take the following raw materials respectively according to the mass percentage:

[0030] Nb 2 o 5 50%-60%, TiO 2 20%-30%, CuO 5%-8%, polyvinyl alcohol 10%-15%;

[0031] Step 2, the Nb taken by step 1 2 o 5 、TiO 2 , CuO is placed in a ball mill jar, and deionized water is added in an amount of 30%-50% of the mass of the mixed raw materials; then ground for 10h-12h;

[0032] Among them, the material of the grinding ball used in the ball mill jar is zirconia, and the quality of the grinding ball is 2-4 times that of the raw material.

[0033] Step 3, drying the ground material in step 2, after grinding for 1h-1.5h, adding 10%-15% of polyvinyl alcohol; performing dry pressing to form a blank;

[0034] Step 4. Degumming the blank prepared in step 3, the required degumming temperature is 650°C-670°C;

[0035] Step 5. Place the blank ...

Embodiment 1

[0040] A composite piezoelectric ceramic, composed of raw materials according to mass percentage:

[0041] Nb 2 o 5 50%, TiO 2 30%, CuO 8%, polyvinyl alcohol 12%.

[0042] Among them, Nb 2 o 5 、TiO 2 , CuO, and polyvinyl alcohol are all solid particles with a diameter of 100 nm.

[0043] A preparation method of composite piezoelectric ceramics, specifically implemented according to the following steps:

[0044] Step 1. Take the following raw materials respectively according to the mass percentage:

[0045] Nb 2 o 5 50%, TiO 2 30%, CuO 8%, polyvinyl alcohol 12%;

[0046] Step 2, the Nb taken by step 1 2 o 5 、TiO 2 , CuO is placed in a ball mill jar, and deionized water is added in an amount of 30% of the mass of the mixed raw materials; then ground for 10 hours;

[0047] Among them, the grinding ball material used in the ball milling tank is zirconia, and the quality of the grinding ball is twice that of the raw material.

[0048] Step 3. Dry the ground mate...

Embodiment 2

[0055] A composite piezoelectric ceramic, composed of raw materials according to mass percentage:

[0056] Nb 2 o 5 53%, TiO 2 25%, CuO 8%, polyvinyl alcohol 14%.

[0057] Among them, Nb 2 o 5 、TiO 2 , CuO, and polyvinyl alcohol are all solid particles with a diameter of 200nm.

[0058] A preparation method of composite piezoelectric ceramics, specifically implemented according to the following steps:

[0059] Step 1. Take the following raw materials respectively according to the mass percentage:

[0060] Nb 2 o 5 53%, TiO 2 25%, CuO 8%, polyvinyl alcohol 14%;

[0061] Step 2, the Nb taken by step 1 2 o 5 、TiO 2 1. Place CuO in a ball mill jar, add deionized water in an amount of 35% of the mass of the mixed raw materials; then grind for 10.5 hours;

[0062] Among them, the grinding ball material used in the ball mill jar is zirconia, and the quality of the grinding ball is 2.5 times that of the raw material.

[0063] Step 3, drying the ground material in ste...

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Abstract

The invention belongs to the technical field of preparation of piezoelectric ceramic materials and discloses composite piezoelectric ceramic. The composite piezoelectric ceramic is mainly prepared from Nb2O5, TiO2, CuO and polyvinyl alcohol. The composite piezoelectric ceramic has advantages that by doping of copper oxide, piezoelectric activity of the piezoelectric ceramic is effectively improved so as to improve electromechanical coupling efficiency in a utilization process. By the preparation method of the composite piezoelectric ceramic, a piezoelectric ceramic preparation process can be simplified.

Description

technical field [0001] The invention belongs to the technical field of piezoelectric ceramic materials, and in particular relates to a composite piezoelectric ceramic, and also relates to a preparation method of the ceramic. Background technique [0002] Piezoelectric ceramics are a class of electronic ceramic materials with piezoelectric properties. The main difference from typical piezoelectric quartz crystals that do not contain ferroelectric components is that the crystal phases that constitute their main components are all ferroelectric crystal grains. Since ceramics are polycrystalline aggregates with randomly oriented grains, the spontaneous polarization vectors of each ferroelectric grains are also chaotic orientations. In order for ceramics to exhibit macroscopic piezoelectric properties, piezoelectric ceramics must be fired and After the end face is re-electroded, it is placed under a strong DC electric field for polarization treatment, so that the original polariz...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/622C04B35/634
CPCC04B35/495C04B35/622C04B35/63416C04B2235/3232C04B2235/3281C04B2235/5445
Inventor 彭甲岐
Owner BAOJI CHANGDA ELECTRICAL TECH
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