Low-loss ultra-high voltage performance lead-free piezoelectric ceramic material and preparation method thereof
A ceramic material, piezoelectric performance technology, applied in piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc., can solve the problems of difficult polarization, poor insulation, etc., to reduce dielectric loss, improve Piezoelectric performance, the effect of overcoming large leakage current
Active Publication Date: 2020-07-10
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology
[0006] By joining Bi 2 WO 6 , to promote sintering, to obtain dense, uniform grain ceramic materials, combined with chemical coating method, in the synthesis of 0.95Ba(Ti 0.89 sn 0.11 )O 3 On the particle surface, Mn / Cu surface-coated particles are obtained by chemical coating method, and a gradient hierarchical structure is formed during synthesis to suppress the price change of Sn, which overcomes the problem of large leakage current in this system, and at the same time improves the piezoelectric performance and reduces the dielectric strength. loss, which solves the problems of poor insulation and difficulty in polarization of the system
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment
[0019] Preparation of lead-free piezoelectric ceramic material with low loss ultra-high voltage performance, the steps are as follows:
[0020] (1) Using analytically pure BaCO3, Bi2O3, CaCO3, SnO2, WO3, TiO2 as raw materials, according to the chemical formula 0.95Ba(Ti0.89Sn0.11)O3-0.05Bi2WO6, mix evenly;
[0021] (2) Put the uniformly mixed raw materials into a ball mill tank, use zirconia as the balls and anhydrous ethanol as the medium for ball milling for 24 hours, separate the balls, and dry them at 80°C; the dried powder is pressed into large pieces Green body, in a high-alumina crucible at 1050 ° C for 2 hours to synthesize the main crystal phase;
[0022] (3) After pulverizing the synthesized main crystal phase, mix with Mn(NO 3 ) 2 , Cu(NO 3 ) 2 solution, according to 0.95Ba(Ti 0.89 sn 0.11 )O 3 -0.05Bi 2 WO 6 +0.5%Mn+0.5%Cu for batching, stirring and mixing evenly, dripping ammonia water, forming a precipitate on the surface of the particles, filtering and ...
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Abstract
The invention discloses a lead-free piezoelectric ceramic material with low loss ultra-high voltage performance and a preparation method thereof. The formula is: 0.95Ba(Ti 0.89 sn 0.11 )O 3 -0.05Bi 2 WO 6 +0.5%Mn+0.5%Cu, by adding Bi 2 WO 6 , to promote sintering, to obtain dense, uniform grain ceramic materials, combined with chemical coating method, in the synthesis of 0.95Ba(Ti 0.89 sn 0.11 )O 3 On the particle surface, the Mn / Cu surface-coated particles are obtained by chemical coating method, and a gradient hierarchical structure is formed during synthesis to suppress the price change of Sn, which overcomes the problem of large leakage current in this system, and at the same time improves the piezoelectric performance and reduces the dielectric strength. Loss, to solve the poor insulation of the system, difficult to polarize and other problems. The ceramic material has ultra-high voltage performance, ultra-low dielectric loss, environmental friendliness and good stability.
Description
technical field [0001] The invention relates to a lead-free piezoelectric ceramic material, specifically an ABO 3 A lead-free piezoelectric ceramic with low-loss ultra-high piezoelectric performance and a preparation method thereof with a perovskite structure. Background technique [0002] Piezoelectric ceramics are information functional ceramic materials that can convert mechanical energy and electrical energy to each other. In addition to piezoelectricity, they also have dielectric properties, elasticity, etc., and have been widely used in medical imaging, acoustic sensors, acoustic transducers, Ultrasonic motors, etc. The piezoelectric ceramic materials currently used are mainly lead-based piezoelectric ceramics, but the PbO content in lead-based piezoelectric ceramics accounts for about 70% of the total raw materials. It brings serious harm to humans and the ecological environment. Lead dissolved in acid rain can directly or indirectly invade the human body through wa...
Claims
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IPC IPC(8): C04B35/468C04B35/622C04B35/634C04B41/88C04B41/80H01L41/187H10N30/853
CPCC04B35/468C04B35/622C04B35/63416C04B41/009C04B41/515C04B41/80C04B41/88C04B2235/96C04B2235/3293C04B2235/3298C04B2235/3258H10N30/8536C04B41/5127C04B41/455
Inventor 周昌荣李子静彭文蔡世劲黎清宁许积文杨玲袁昌来曾卫东陈国华
Owner GUILIN UNIV OF ELECTRONIC TECH