Method for preparing [100] oriented textured barium titanate piezoelectric ceramics

A technology of barium titanate and piezoelectric ceramics, which is applied in the field of preparation of barium titanate piezoelectric ceramics textured in the [100] direction, can solve the problems of low piezoelectric performance of barium titanate ceramics, and overcome random growth , high density, and the effect of improving piezoelectric performance
CN107586129AActive Publication Date: 2018-01-16BAOJI UNIV OF ARTS & SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BAOJI UNIV OF ARTS & SCI
Publication Date
2018-01-16

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Abstract

The invention discloses a method for preparing [100] oriented textured barium titanate piezoelectric ceramics. The method comprises the following steps: taking two-dimensional barium titanate mesocrystals and barium titanate powder as raw materials, preparing slurry into a membrane by adopting a tape casting method, and performing heat treatment after the membrane is prepared into a green body, thereby obtaining the [100] oriented textured barium titanate piezoelectric ceramics. According to the method, the barium titanate piezoelectric ceramics are prepared by utilizing anisotropism of piezoelectric materials and topological mesoscopic transformation of the mesocrystals; in the method, the flake barium titanate mesocrystal with large diameter height ratio and excellent orientation servesas a reaction template, the random growth property of the traditional barium titanate particles can be overcome, and the prepared [100] oriented textured barium titanate piezoelectric ceramic materialis capable of greatly improving the piezoelectric property of the barium titanate ceramics; the prepared barium titanate piezoelectric ceramic is small in particles and high in density, has an orientation degree of 28-80.6% in the [100] direction, reaches a piezoelectric constant of 154-322pC / N and can be widely applied to a piezoelectric sensor, a multi-layer capacitor or a memory.
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Description

technical field

[0001] The invention belongs to the technical field of piezoelectric ceramic preparation, and in particular relates to a method for preparing barium titanate piezoelectric ceramics textured in the

[100] direction. Background technique

[0002] Piezoelectric ceramic material is a very important functional material, which is widely used in information, aerospace, electronics, sensors and other fields. For a long time, lead zirconate titanate (PZT) ceramic materials have excellent ferroelectric properties, dielectric properties, piezoelectric properties and optical properties. However, since the PZT ceramic material is a lead-containing material, the lead generated during its preparation and application will lead to environmental pollution and even lead poisoning of the human body. Therefore, research on lead-free piezoelectric materials that are environmentally friendly and have good piezoelectric properties has attracted much attention.

[0003] Barium titan...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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