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Lanthanum-doped lead niobate zincate zirconate titanate piezo-electric ceramic material and its preparation method

A technology of lead zirconate titanate and piezoelectric ceramics, applied in the field of piezoelectric ceramics

Inactive Publication Date: 2007-10-24
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the formation of the pyrochlore phase, lead niobate zincate-lead titanate ceramics with a perovskite phase structure near the phase boundary have not been synthesized by traditional sintering methods (Am.Ceram.Soc.Bull., 1987, P704-711; J.Am.Ceram.Soc., 2004, P1238-1243)

Method used

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  • Lanthanum-doped lead niobate zincate zirconate titanate piezo-electric ceramic material and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1-7

[0021] Embodiment 1-7. Press Pb (Zn 1 / 3 Nb 2 / 3 ) y (Zr z Ti 1-z ) 1-y o 3 +xLa 2 o 3 , where x=0.043, y=0.3, z=0.50-0.530 ingredients, using ZrO 2 Ball milling is carried out for 6 hours as the ball milling medium, and after drying, the obtained raw material is ground into powder, and then sieved to keep the ingredients uniform. After adding 6% (percentage by weight) of PVA binder, it is molded into a cylinder of Φ30×30mm under a pressure of 50MPa. Then use hot pressing to sinter. The process parameters of the sintering process are:

[0022] Raise the temperature to 900°C at a rate of 250°C / hour, and keep it warm for 1 hour; then raise the temperature at 100°C / hour and pressurize it gradually (16MPa / 15min) to 160MPa, then keep the pressure constant, heat up to 1200°C, and keep it warm for 3 hours , and then raise the temperature to 1220°C, release the pressure after holding the heat for 3 hours, then cool down to 900°C after holding the heat for 7 hours, and then co...

Embodiment 8

[0027] Embodiment 8 has the same general formula as that of Embodiment 1-7, but x≠0.043, y≠0.3, z is not between 0.505-0.530, but 033 and k p It is far lower than the value described in Example 1, but it can still be used as an ultrasonic transducer and a micro-driver.

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Abstract

The invention relates to lanthanum-doping niobium zinc lead zirconate titanate as new piezoelectric ceramic material, which is prepared by oxygen-atmosphere hot-press method on condition of 160MPa, oxygen flow quantity 5L / min and 1150~1230Deg. The product, with performance lied in the ceramic constituent: Pb(Zn1 / 3Nb2 / 3)y(ZrzTi1-z)1-yO3+xLa2O3 ( 0 C04B 35 / 472 C04B 35 / 622 H01L 41 / 187 1 4 2 2005 / 9 / 9 1765825 2006 / 5 / 3 100344576 2007 / 10 / 24 2007 / 10 / 24 2007 / 10 / 24 Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 Yin Qingrui Deng Guochu Ding Aili Zheng Xinsen Cheng Wenxiu pan zhen 31002 Shanghai Patent Agency of the Chinese Academy of Sciences No.319 Yueyang Road, Shanghai 200031

Description

technical field [0001] The invention relates to a lanthanum-doped niobium-zinc-zirconate lead-zirconate piezoelectric ceramic and a preparation method thereof, belonging to the field of piezoelectric ceramics. Background technique [0002] With the development of medicine, higher requirements are put forward for the clarity and contrast of medical imaging. The key material of medical imaging probe is piezoelectric material. For piezoelectric materials used in medical imaging probes, it is required to have a high piezoelectric coefficient, a high radial electromechanical coupling coefficient, and the difference between the resonant frequency and the antiresonant frequency, that is, the bandwidth, the wider the better. [0003] The lead niobate zincate-lead titanate and lead magnesium niobate-lead titanate single crystals with perovskite phase structure have excellent dielectric properties, piezoelectric properties, and very wide bandwidth. They are ideal for drivers, ultrason...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/472C04B35/622H01L41/187H10N30/853
Inventor 殷庆瑞邓国初丁爱丽郑鑫森程文秀
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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