Pb-based stibate niobium-Pb-based zirconate titanates piezoelectric ceramic doped with barium carbonate and preparation method thereof
A technology of lead niobium antimonate and lead zirconate titanate, which is applied in the field of barium-doped lead niobium antimonate-lead zirconate titanate piezoelectric ceramics, can solve the problems of high electromechanical coupling coefficient, limited application range, general comprehensive performance, etc. Achieve the effect of improving the dielectric properties, improving the comprehensive electrical properties, and increasing the volume of the unit cell
Inactive Publication Date: 2012-07-18
TIANJIN UNIV
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Problems solved by technology
As we all know, PSN-PZT ceramics are characterized by high electromechanical coupling coefficient and good stability, but their general performance limits their scope of application.
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[0033] The present invention adopts commercially available chemically pure raw material (purity ≥ 99%), is Pb 3 o 4 , ZrO 2 、TiO 2 , Sb 2 o 3 , Nb 2 o 5 and BaCO 3 . The preparation steps are as follows:
[0034] (1) Ingredients
[0035] Raw material Pb 3 o 4 , ZrO 2 、TiO 2 , Sb 2 o 3 , Nb 2 o 5 、BaCO 3 by Pb 1-x Ba x (Zr 0.52 Ti 0.48 ) 0.98 (Nb 1 / 2 Sb 1 / 2 ) 0.02 o 3 Stoichiometric proportioning, wherein x=4.0mol%~12.0mol%. Mix the materials in a ball mill, the weight ratio of balls:material:water is 2:1:0.5, the ball milling time is 3h, and then dry the raw materials;
[0036] (2) synthesis
[0037] Put the dried powder in step (1) into an alumina crucible, cover and seal it, and synthesize it at 900°C for 2 hours;
[0038] (3) Molding and ejection
[0039] The synthetic material in step (2) is ball milled and dried again, and granulated with 7wt% polyvinyl alcohol aqueous solution, and after sieving, it is pressed and formed into a green body u...
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The invention discloses a preparation method for Pb-based stibate niobium-Pb-based zirconate titanates piezoelectric ceramics doped with barium carbonate, comprising the following steps of: (1) proportioning according to the stoichiometric ratio of Pb1-xBax(Zr0.52Ti0.48)0.98(Nb1 / 2Sb1 / 2)0.02O3 with x being equal to 4.0mol%-12.0mol%; (2) synthesizing; (3) molding and binder removing; (4) sintering at the temperature between 1260 and 1280 DEG C; (5) silver sintering; and (6) polarizing at the temperature of 120 DEG C in a polarizing electric field which is a 3.0KV / mm direct current electric field for 15 minutes. By doping Ba<2+> with different contents, comprehensive electric properties of the Pb-based stibate niobium (PSN)-Pb-based zirconate titanates (PZT) piezoelectric ceramic are greatly improved. The best comprehensive property is acquired when the doping amount is 4.0mol% and the sintering temperature is 1280 DEG C and d33 is equal to 467pC / N, kp is equal to 74.5% and tan(delta) is equal to 1.45%. The piezoelectric ceramic can be used for elements which have higher requirement on comprehensive properties of the piezoelectric ceramic, such as high-power drivers and high temperature detecting elements.
Description
technical field [0001] The present invention relates to ceramic compositions characterized by composition, and in particular to barium-doped lead niobate antimonate-lead zirconate titanate piezoelectric ceramics. Background technique [0002] Piezoelectric ceramics is a functional ceramic material that realizes mutual conversion of mechanical energy and electrical energy. It has not only the general properties of ferroelectric ceramics, but also unique piezoelectric properties. Piezoelectric ceramic materials have unique piezoelectric properties, excellent electromechanical coupling properties, dielectric and elastic properties, and the characteristics of simple preparation process, small size, no electromagnetic interference, and low cost, so they are widely used in aerospace, information, and biology. , precision instruments and other high-tech fields and industrial production have been widely used. [0003] The application of piezoelectric ceramics is mainly divided into...
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IPC IPC(8): C04B35/49C04B35/622
Inventor 孙清池刘志华马卫兵吴涛李建平
Owner TIANJIN UNIV