0-3 type PZT-steel slag piezoelectric composite material

Abstract

The invention belongs to the field of intelligent materials of civil engineering and in particular relates to a 0-3 type PZT-steel slag piezoelectric composite material. The 0-3 type PZT-steel slag piezoelectric composite material is prepared from the following components in parts by weight: 22 to 30 parts of steel slag, 55 to 65 parts of PZT and 12 to 17 parts of water. The steel slag is carbonized and hardened to form a piezoelectric composite material matrix; the dispersion of a piezoelectric phase in the matrix is improved by utilizing a powder pre-mixing, pressing and molding mode; meanwhile, the carbonized steel slag has high mechanical strength and is rapidly developed; the matrix has high compactness, mechanical properties and durability; the matching degree of the mechanical properties of the carbonized steel slag matrix and the piezoelectric phase is high and the performance of the composite material is stable for a long period; 2) a preparation method provided by the invention has a simple and controllable technology and the prepared 0-3 type PZT-steel slag piezoelectric composite material has the advantages of excellent piezoelectric and mechanical properties, high durability, high controllable degree, low cost and the like.

Description

technical field [0001] The invention belongs to the field of civil engineering intelligent materials, in particular to a 0-3 type PZT-steel slag piezoelectric composite material. Background technique [0002] At present, major projects such as marine engineering, underground engineering, large bridges, and high-speed railways in my country have put forward higher requirements for the durability and safety of concrete structures. The application of smart sensors to online real-time monitoring of their service performance is the guarantee for major civil engineering structures. Effective means and cutting-edge research directions. [0003] Piezoelectric ceramic sensors are widely used in the detection of concrete structures. However, the piezoelectric ceramic sensor has a single function, and there are compatibility problems such as unreliable bonding and easy falling off with the concrete, resulting in inaccurate feedback detection signals and bringing a lot of false interfer...

AI Technical Summary

Problems solved by technology

[0004] At present, traditional cement-based piezoelectric materials rely on cement hydration and hardening as their strength development mechanism, which has problems such as low strength and slow development, unstable durability, and mismatching of the mechanical properties of the matrix and the piezoelectric phase.

Therefore, it is difficult for traditional cement-based piezoelectric materials to achieve both high-voltage electrical performance and good mechanical durability.