Multielement-doped bismuth titanate group lead-free piezoceramic material and preparation method thereof

Abstract

The invention provides a multielement-doped bismuth titanate group lead-free piezoceramic material and a preparation method thereof. Bi4Ti3-2xNbxTax-ySbyO12 ceramic is prepared by an isostatic pressing mode and a conventional solid phase sintering method, wherein x is more than 0 and is less than or equal to 0.1, and y is more than 0 and is less than or equal to 0.1. The preparation method comprises the steps of taking a Bi4Ti3O12 system as a base, taking Nb2O5, Ta2O5 and Sb2O3 as adulterants, and doping a bismuth titanate group lead-free piezoceramic material by multielements (Nb, Ta and Sb); and after mixed ball milling, drying, pre-synthesizing, briquetting, discharging plastic, sintering to power materials under the temperature of 1050-1150DEG C to prepare the compact and lead-free piezoceramic material. By combining the isostatic pressing mode with the conventional solid phase sintering method, the piezoelectric coefficient (d33) of the prepared bismuth titanate group lead-free piezoceramic material is as high as 35pC / N, and the curie temperature of the material is kept to be more than 630DEG C. Furthermore, the preparation technology is stable and reliable, meets the practical applicability requirement of the piezoceramic material, and can be used under special high-temperature environments such as aerospace, aviation, petrochemical industryies, and the like.

Description

technical field [0001] The invention relates to a piezoelectric ceramic material and a preparation method of the piezoelectric ceramic material, belonging to the field of functional ceramics, in particular to a multi-element doped bismuth titanate-based lead-free piezoelectric ceramic material and a preparation method thereof. Background technique [0002] Piezoelectric ceramics is a functional ceramic material that can convert mechanical energy and electrical energy into each other. It is widely used in many fields closely related to people's lives to achieve energy conversion, sensing drive, frequency control, etc. Function. In terms of energy conversion, piezoelectric igniters, mobile X-ray machine power supplies, shell detonators, piezoelectric transformers, piezoelectric pickups, piezoelectric buzzers, piezoelectric horns, metal flaw detectors, and ultrasonic cleaning can also be manufactured. , Ultrasound Medical, Ultrasonic Cutter. In terms of sensing, it can be app...

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Problems solved by technology

However, the multi-element doping modification of bismuth titanate lead-free piezoelectric ceramics is currently limited, and there are very few reports at present.

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