Ternary system high-temperature piezoelectric ceramic of magnesium bismuth titanate, bismuth zinc-based perovskite and lead titanate and preparation method thereof

Abstract

The invention discloses a ternary system high-temperature piezoelectric ceramic of magnesium bismuth titanate, bismuth zinc-based perovskite and lead titanate and a preparation method thereof. The composition of the piezoelectric ceramic is expressed by a general formula (1-n) [uBi(Mg0.5Ti0.5)O3 + vBi(ZnxDy)O3 + (1-u-v) PbTiO3] + nM; and the preparation method comprises the steps of mixing, ball milling, pre-sintering, blank making, sintering, silver coating and polarization. The composition of the piezoelectric ceramic has perovskite structure and has similar phase interface of a rhombic ferroelectric phase and a foursquare ferroelectric phase, so the piezoelectric ceramic has excellent piezoelectric performance and high Curie temperature, is more suitable for high-temperature field, and has low dielectric loss; the electric polarization process is easier and more convenient; and the piezoelectric ceramic can be prepared by adopting a preparation technology of the traditional piezoelectric ceramic, particularly adopting cheap industrial raw materials, and has practicability.

Description

1. Technical field [0001] The invention relates to a piezoelectric ceramic and a preparation method thereof, specifically a bismuth magnesium titanate-bismuth zinc-based perovskite-lead titanate ternary high-temperature piezoelectric ceramic and a preparation method thereof, which belong to the manufacturing technology of electronic components field. 2. Background technology [0002] High-temperature piezoelectric ceramic materials have been widely used in many scientific research and industrial sectors such as aerospace, automobile, petrochemical, metallurgy, and site exploration. With the rapid development of science and technology, many electronic devices put forward higher requirements for the practical range and application environment of piezoelectric ceramic devices. At present, there are very few high-temperature piezoelectric ceramic materials with excellent performance and a service temperature higher than 400 °C. For a long time, piezoelectric single crystal mat...

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Problems solved by technology

Unfortunately, there is no research report on the electrical properties and preparation process of piezoelectric ceramics formed from bismuth magnesium magnesium oxide-bismuth zinc-based perovskite-lead titanate in the existing literature.

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