Piezoelectric ceramic composition and manufacturing method of piezoelectric ceramic

A technology of piezoelectric ceramics and manufacturing methods, applied in the field of piezoelectric materials, can solve problems such as high sintering temperature, easy volatilization of PbO, deviation of stoichiometric ratio, etc., and achieve excellent performance and pleasing appearance

Inactive Publication Date: 2012-07-25
JIANGSU YILONG NEW ENERGY TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that due to the high sintering temperature (about 1300°C), PbO is easy to volatilize, which often leads to deviations in the stoichiometric ratio, and the performance is difficult to control stably.
The volatilization of PbO also causes damage to the environment and affects human health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Dry lead trioxide, zirconium dioxide and titanium dioxide first, and then weigh them with an analytical balance: lead tetraoxide: 1206.88 grams; zirconium dioxide: 464.84 grams; titanium dioxide: 257.41 grams. Then, the above-mentioned three substances weighed were mixed for 6 hours, dehydrated, dried, calcined at 960 ° C for 2 hours, pulverized by a vibrating mill, added 3% by weight of polyvinyl alcohol binder, at 1.5 tons / cm 2 A disc with a diameter of 12mm and a thickness of 1.2mm is made under a certain pressure, and the glue is removed at 900°C; fired at 1300°C (at this temperature, the bulk density reaches saturation, and the bulk density is equal to the ratio of weight to volume); plated electrodes 3000V / mm is polarized, then measure the dielectric constant, piezoelectric constant D33 and electromechanical energy conversion constant of the product obtained, the results obtained are as follows: dielectric constant: 6355; D33:612; electromechanical energy conversio...

Embodiment 2

[0021] Dry lead trioxide, zirconium dioxide and titanium dioxide first, and then weigh them with an analytical balance: lead tetraoxide: 1206.88 grams; zirconium dioxide: 464.84 grams; titanium dioxide: 257.41 grams. Then, weigh 9.65 grams of dried antimony trioxide. Then, wet mix the above four substances for 6 hours, dehydrate, dry, calcinate at 960°C for 2 hours, pulverize, add 3% by weight of polyvinyl alcohol binder, at 1.5 tons / cm 2 A disc with a diameter of 12mm and a thickness of 1.2mm is made under a certain pressure, and the glue is discharged at 900°C; fired at 1200°C (at this temperature, the bulk density reaches saturation, and the bulk density is equal to the ratio of weight to volume); plated electrodes ; Polarized at 3000V / mm, then measure the dielectric constant, piezoelectric constant D33 and electromechanical energy conversion constant of the product obtained, the results obtained are as follows: dielectric constant: 6280; D33:635; electromechanical energy c...

Embodiment 3

[0024] Dry lead trioxide, zirconium dioxide and titanium dioxide first, and then weigh them with an analytical balance: lead tetraoxide: 1206.88 grams; zirconium dioxide: 464.84 grams; titanium dioxide: 257.41 grams. Then, weigh again the dried antimony trioxide 19.56 grams. Then, wet mix the above four substances for 6 hours, dehydrate, dry, calcinate at 960°C for 2 hours, pulverize, add 3% by weight of polyvinyl alcohol binder, at 1.5 tons / cm 2 A disc with a diameter of 12mm and a thickness of 1.2mm is made under a certain pressure, and the glue is discharged at 900°C; fired at 1155°C (at this temperature, the bulk density reaches saturation, and the bulk density is equal to the ratio of weight to volume); plated electrodes ; Polarized at 3000V / mm, then measure the dielectric constant, piezoelectric constant D33 and electromechanical energy conversion constant of the product obtained, the results obtained are as follows: dielectric constant: 6185; D33:612; electromechanica...

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PUM

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Abstract

The invention relates to a piezoelectric material, and particularly to a piezoelectric ceramic composition and a manufacturing method of the piezoelectric ceramic. The piezoelectric ceramic composition comprises lead tetraoxide, zirconium dioxide and titanium dioxide and is characterized by also comprising antimony trioxide, wherein the content of antimony trioxide is 0.5-2% the weight sum of lead tetraoxide, zirconium dioxide and titanium dioxide. The invention also provides a method for manufacturing the piezoelectric ceramic. Test results show that the piezoelectric ceramic manufactured from the piezoelectric ceramic composition has excellent piezoelectric performances, the dielectric constant is not less than 6000, the piezoelectric constant D33 is not less than 600, and the electromechanical energy conversion factor is not less than 65%; and furthermore, the sintering temperature is 100-200 DEG C lower than that of the piezoelectric material free of antimony trioxide and lithium carbonate.

Description

technical field [0001] The invention relates to a piezoelectric material, in particular to a piezoelectric ceramic composition and a manufacturing method of the piezoelectric ceramic. Background technique [0002] Piezoelectric ceramics are functional ceramic materials that can convert mechanical energy and electrical energy into each other. Piezoelectric ceramics belong to inorganic non-metallic materials and are polycrystals with piezoelectric effect. Ceramic piezoelectric materials include barium carbonate, lead zirconate titanate (PZT), and the like. Lead zirconate titanate (PZT) piezoelectric ceramic material has superior piezoelectric performance, high Curie temperature, large electromechanical coupling coefficient and mechanical quality factor, good temperature stability and durability, and can be made into any shape. The disadvantage is that due to the high sintering temperature (about 1300 °C), PbO is volatile, which often leads to deviations in the stoichiometric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/491C04B35/622
Inventor 芮国林王毅君
Owner JIANGSU YILONG NEW ENERGY TECH DEV
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