Sodium-potassium niobate series substituted by bismuth-base calcium-titanium ore and preparing method

Abstract

The invention relates to a potassium niobate natrium series leadless piezoelectric ceramics and the manufacturing method. It is expressed by the general equation: (1-u)[(1-n)(LitNa1-w-t1Kw-t2)(Nb1-g-fTagSbf)O3+nBiMeO3]+uM. The invention has stable manufacturing technology and has great usefulness.

Description

technical field The invention relates to lead-free piezoelectric ceramics and a preparation method thereof, more specifically to potassium-sodium niobate series lead-free piezoelectric ceramics and a preparation method thereof. Background technique Since the 1960s, lead zirconate titanate (Pb(Zr,Ti)O 3 ) as the main component of piezoelectric ceramics has been widely used in electronics, aerospace, communications, military and many other fields. For example, piezoelectric ceramics are made into various filters, oscillators, notch filters and other electronic components. However, the content of lead oxide or trilead tetroxide in these piezoelectric ceramic materials accounts for more than 70%. These lead-containing piezoelectric ceramics will bring serious harm to human health and the living environment during use and disposal. Sodium bismuth titanate is a lead-free ferroelectric ceramic with a perovskite structure that was studied earlier. Its single crystal has a large...

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Problems solved by technology

However, there is no research report on the electrical properties and preparation process of lead-free piezoelectric ceramics based on bismuth-based perovskite substituted potassium sodium niobate series in the existing literature.

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