Method for preparing electric ferroelectric thick film by liquid phase epitaxy

Abstract

In the method, oxide raw material is prepared according to composition used normally in crystal growth of lead magnesate niobium-lead titanate or lead zincate niobium-lead titanate first. Then the prepared power material is put into agate mortar for ball grinding and to carry on roasting at temperature of 900 degreeC. At last, PZNT (PMNT) thick film is prepared by epitaxial growth on substrate of strontium titanate after the roasted powder material is mixed uniformly with flux of lead oxide and to soak it under high temperature for a period of time.

Description

Technical field:

[0001] The present invention relates to a liquid phase epitaxy (Liquid Phase Epitaxy, referred to as LPE) method for preparing a ferroelectric thick film, which is a method of adding through the top seed crystal substrate in a high-temperature solvent, and controlling it on the seed crystal substrate according to a specific A new approach to fabricate ferroelectric thick-film materials with uniform composition, structure, and properties by epitaxial growth. Background technique:

[0002] Lead-based ferroelectric materials have attracted widespread attention from scholars at home and abroad for their excellent piezoelectric and dielectric properties, and have been widely used in medical ultrasonic diagnostic equipment and naval sonar. At present, the annual output value of only B-type ultrasonic diagnostic and therapeutic instruments in the world is as high as 2 billion U.S. dollars, of which the material market is close to 200 million U.S. dollars, and lead ...