Additive and application thereof for reducing sintering temperature of piezoceramic

Abstract

The invention relates to the technical field of inorganic nonmetallic materials, in particular to an additive and the application thereof for reducing the sintering temperature of piezoceramic, wherein the additive takes Pb(Zn1/3Nb2/3)0.1(Ni1/3Nb2/3)0.1Zr0.47Ti0.33) (PZN-PNN-PZT) as a basic formula system; the additive that accounts for 1 to 11 percent of the weight of the basic formula system is added in the basic formula system; and the additive comprises the following ingredients by mass: LiBiO2 accounts for 44 to 65 percent, CuO accounts for 1 to 20 percent, and ZnO-B2O3-Li2O-SiO2 accounts for 25 to 45 percent. The low-temperature sintering piezoceramic that is prepared after the additive is added has the performances as follows: the dielectric constant ranges from 2500 to 3000, the dielectric loss is less than or equals to 2.0 percent, the planar electromechanical coupling factor is more than or equals to 65 percent, the piezoelectric strain constant is more than or equals to 420pC/N, the mechanical quality factor ranges from 100 to 400, and the sintering temperature ranges from 900 to 930 DEG C. The additive and the application thereof can reduce the sintering temperature of piezoceramic so as to obtain the piezoceramic with low-temperature sintering (the sintering temperature ranges from 900 to 930 DEG C) and high piezoelectric properties, can greatly lower the cost of a piezoceramic device, can inhibit the volatilization of lead oxide, and can accord with the environmental protection requirements.

Description

technical field [0001] The invention relates to the technical field of inorganic non-metallic materials, in particular to an additive and its use for lowering the sintering temperature of piezoelectric ceramics. The special additive LiBiO is used 2 +CuO+ ZnO-B 2 o 3 -Li 2 O-SiO 2 Glass powder is used to reduce the sintering temperature of piezoelectric ceramics to obtain piezoelectric ceramics with low-temperature sintering (900~930°C) high-voltage performance. The piezoelectric ceramics are suitable for the preparation of piezoelectric ceramic buzzers, multilayer piezoelectric ceramic devices, Electroacoustic transducers, ultrasonic sensors, etc. At the same time, the cost of the piezoelectric ceramic device can be greatly reduced, and the volatilization of lead oxide can be suppressed, thereby meeting the requirement of environmental protection. Background technique [0002] Piezoelectric ceramics are functional materials that can convert mechanical energy to electric...

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Problems solved by technology

[0006] China's 2005 dissertation (Author: Lu Pengxian) "Research on Doping Modification and Low-temperature Sintering of PZT-Based Piezoelectric Ceramics" disclosed a low-temperature sintered piezoelectric ceramic, and its formula system is 0.2PZN-0.8PZT and 0.02PNW -0.07PMN-0.91PZT, the best performance is: the dielectric constant is 1952, d 33 =312pC/N, Kp=0.498, ...

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