Preparation method of pure lead zirconate titanate nanofiber ceramic material

Abstract

The invention discloses a preparation method of a pure lead zirconate titanate nanofiber ceramic material, which comprises the following steps: S1, dissolving a lead salt in ethylene glycol to preparea first solution; S2, mixing ethylene glycol, glacial acetic acid and absolute ethyl alcohol to form a mixed solvent, and adding a first part of PVP, a zircon salt and a titanium salt to be sequentially dissolved to prepare a second solution; S3, mixing the first solution with the second solution, and adding a second part of PVP to be dissolved to obtain a PZT precursor sol solution; S4, performing electrostatic spinning on the PZT precursor sol solution to obtain PZT precursor fibers; and S5, carrying out heat treatment on the PZT precursor fibers to obtain the pure lead zirconate titanate nanofiber ceramic material. The pure lead zirconate titanate nano ceramic fiber material which is 50-200 nm in size, uniform in size and stable in performance is simply and effectively prepared by combining a gel process and an electrostatic spinning process, and the piezoelectric activity D33 of the pure lead zirconate titanate nano ceramic fiber material reaches up to 450-500 pC / N.

Description

technical field [0001] The invention relates to the technical field of piezoelectric ceramics, in particular to a preparation method of a pure lead zirconate titanate nanofiber ceramic material. Background technique [0002] Lead zirconate titanate (PZT) material is a widely used piezoelectric functional material, which has many advantages such as good piezoelectric, dielectric, ferroelectric properties, and good stability, especially near the quasi-phase boundary point, PZT Ceramics have high piezoelectric constants and electromechanical coupling coefficients, and are the basic materials for the preparation of ultrasonic transducers, piezoelectric transformers, filters, piezoelectric buzzers and other devices, and play an important role in electronic materials and machinery manufacturing . [0003] The preparation of lead zirconate titanate powder with high purity, high voltage electroactivity, uniform particle size and proper stoichiometric ratio is the most important pre...

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Problems solved by technology

At present, there are many methods for preparing PZT powder, but both the traditional high-temperature solid-phase synthesis method and the chemical co-precipitation method have many disadvantages in the preparation of pure PZT, such as poor piezoelectric activity, low sintering activity, and uneven particle size. And so on, in order to improve the above drawbacks of pure PZT, the main method at present is to improve the piezoelectric activity of PZT by doping modification, but due to the difference between the dopant ions and the original lattice ions, the dopant ions in the lattice cannot Stable existence leads to unstable performance of doped modified PZT powder, and more impurity phases appear, which will cause many hidden dangers to the performance and stability of the device in the later stage

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