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Modified PZT piezoelectric ceramics with Nano powder being added directly, and preparation method

A technology of nano-powder and piezoelectric ceramics, applied in the direction of piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc., can solve the problems of high cost of finished products and low application value, and achieve electromechanical coupling coefficient Low, reproducible, pollution-reducing effect

Active Publication Date: 2007-05-09
ZHEJIANG JIAKANG ELECTRONICS CO LTD +1
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the significant role of nano-powders in improving the sintering properties of materials and adjusting defects, quite a few researchers at home and abroad have prepared full-component lead zirconate titanate nano-powders by different methods, including hydrothermal method , sol-gel method, metal-organic compound thermal decomposition method, and mechanochemical method; however, the research on the preparation of piezoelectric materials by using some components of lead zirconate titanate nanopowders as raw materials and its influence on the properties of piezoelectric materials is still in progress. Very few, and this method has the problem of high cost of finished products, and has little application value in industrialization
On the other hand, the price of the nano-powder of the single raw material of the lead zirconate titanate system has dropped to an acceptable level for industrialization. Under the premise of improving the parameters of the key process, the use of these commercial nano-powder raw materials is basically Under the same premise, the research work on the adjustment and improvement of the electrical properties of piezoelectric ceramics prepared by adjusting the process system through the partial substitution of nano-powders for the corresponding components of micro-powders is rarely reported.
In particular, apply this technology to the field of lead zirconate titanate ceramics for frequency components, and obtain the industrialization technology of modified lead zirconate titanate ceramic piezoelectric ceramic materials with excellent piezoelectric properties prepared by direct addition of nano-powders And related frequency component products have not been reported

Method used

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  • Modified PZT piezoelectric ceramics with Nano powder being added directly, and preparation method
  • Modified PZT piezoelectric ceramics with Nano powder being added directly, and preparation method
  • Modified PZT piezoelectric ceramics with Nano powder being added directly, and preparation method

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Experimental program
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Effect test

Embodiment 1

[0023] According to formula Pb 1-X A X (Zr 0.5+Y Ti 0.4+Z )(B 1 / 3 C 2 / 3 ) Y+Z o 3 , wherein A is Mg, B is Mn, and C is Nb; x=0.10, Y=0.026, Z=0.074. Mole ratio Pb 3 o 4 : Micron (MgCO 3 ) 4 ·Mg(OH) 2 ·5H 2 O: ZrO 2 :( Micron TiO 2 : Nano TiO 2 ): MnCO 3 : Nb 2 o 5 =0.3000: 0.02: 0.5260: (0.2844: 0.1896): 0.0333: 0.0333 Weighing, preparation conforms to the composition of the formula and includes the mixture of nano-powder component additives; the weight ratio of the mixture to deionized water is 2: 1.0 Add deionized water and mix with rolling ball mill at 300r / min for 36h; dry the ball mill at 180°C for 24h; put the dried mixture into an alumina crucible and calcinate at 890°C for 2h to synthesize the PZT phase as the main crystal phase, containing a small amount of PbZrO 3 and PbTiO 3 Crystalline nanopowder is added to calcined material. Add deionized water to the calcined material according to the weight ratio of calcined material and deionized water as...

Embodiment 2

[0025] According to formula Pb 1-X A X (Zr 0.5+Y Ti 0.4+Z )(B 1 / 3 C 2 / 3 ) Y+Z o 3 , wherein A is Mg, B is Mn, and C is Nb; x=0.10, Y=0.026, Z=0.074. Mole ratio Pb 3 o 4 : Micron (MgCO 3 ) 4 ·Mg(OH) 2 ·5H 2 O: ZrO 2 :( Micron TiO 2 : Nano TiO 2 ): MnCO 3 : Nb 2 o 5 =0.3000: 0.02: 0.5260: (0.1896: 0.2844): 0.0333: 0.0333 Weighing, preparation conforms to the composition of the formula and includes the mixture of nano-powder component additives; the weight ratio of the mixture to deionized water is 2: 1.0 Add deionized water, mix at a speed of 300r / min for 36 hours; dry the ball mill at 180°C for 24 hours; put the dried mixture into an alumina crucible, and calcinate it at 845°C for 5 hours to synthesize the PZT phase as the main crystal phase, containing a small amount of PbZrO 3 and PbTiO 3 Crystalline nanopowder is added to calcined material. Add deionized water to the calcined material according to the weight ratio of calcined material and deionized wate...

Embodiment 3

[0027] According to formula Pb 1-X A X (Zr 0.5+Y Ti 0.4+Z )(B 1 / 3 C 2 / 3 ) Y+Z o 3 , wherein A is Mg, B is Mn, and C is Nb; x=0.10, Y=0.026, Z=0.074. Mole ratio Pb 3 o 4 : Micron (MgCO 3 ) 4 ·Mg(OH) 2 ·5H 2 O: ZrO 2 :( Micron TiO 2 : Nano TiO 2 ): MnCO 3 : Nb 2 o 5 =0.3000: 0.02: 0.5260: (0.0948: 0.3792): 0.0333: 0.0333 Weighing, preparation conforms to the composition of the formula and includes the mixture of nano-powder component additives; the weight ratio of the mixture to deionized water is 2: 1.0 Add deionized water, mix with rolling ball mill at a speed of 300r / min for 36h; dry the ball mill at 180°C for 24h; put the dried mixture into an alumina crucible, and calcinate at 800°C for 10h to synthesize the PZT phase as the main crystal phase, containing a small amount of PbZrO 3 and PbTiO 3 Crystalline nanopowder is added to calcined material. Add deionized water to the calcined material according to the weight ratio of calcined material and deionize...

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Abstract

This invention relates to a method for preparing nanopowder-modified lead zirconate titanate piezoelectric ceramic. The method directly adds nanopowder as a substitute for micropowder into the mixed raw materials, which can reduce pre-sintering temperature by 50-200 deg.C and final-sintering temperature by 50-100 deg.C, and can adjust the crystalline and properties of pre-sintered sample as well as the electrical properties of the sintered piezoelectric ceramic. Nanopowder-modified piezoelectric ceramic sintered at 1200 deg.C has a Curie point increased by 50-100 deg.C. Besides, the piezoelectric ceramic has excellent impact stability (TC = 350-400 deg.C; epsiv = 350-800; KP = 0.48-0.60), adjustable piezoelectric constant, stable process and good repeatability. The piezoelectric ceramic can be used to produce ceramic frequency discriminator and ceramic filter.

Description

technical field [0001] The invention relates to a piezoelectric ceramic and a preparation method thereof, in particular to a modified lead zirconate titanate (PZT) piezoelectric ceramic directly added with nano powder and a preparation method thereof, belonging to the technical field of functional ceramic preparation. Background technique [0002] Around 1942, barium titanate ceramics were successively discovered by scientists in the United States, the former Soviet Union and Japan, and became the first piezoelectric ceramic material with application prospects after the French Curie brothers discovered the "piezoelectric effect". In 1947, the first piezoelectric ceramic device-barium titanate (BT) pickup was born. In the early 1950s, the lead zirconate titanate (PZT) piezoelectric ceramic material with significantly better performance than barium titanate was successfully developed. Since then, the development of piezoelectric ceramics has entered a new stage. From the 196...

Claims

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Application Information

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IPC IPC(8): C04B35/462C04B35/622H01L41/187
Inventor 陶锋烨王振洪樟连李广慧郭煌胥金华姚志军张火荣王民权
Owner ZHEJIANG JIAKANG ELECTRONICS CO LTD
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