Test methods for the properties of piezoelectric ceramics material with the low mechanical quality factor 壓電陶瓷材料性能測試方法低機械品質因數壓電陶瓷材料性能的測試
The relations between piezoelectric characteristic such as piezoelectric constant , electromechanical coupling coefficient , mechanical quality factor , etc . and its components , granular diameter and manufacturing technology were studied 研究壓電材料壓電常數、機電耦合系數、機械品質因數等特性與其組份、顆粒直徑及制作工藝過程之間的關系。
So it can be used as both sensor component and driving component . pzt have better electromechanical coupling coefficient , piezoelectric constant , mechanical quality factor , curie temperature and stability , etc . so , pzt can be used widely in smart materials and structure 與其它壓電陶瓷相比,鋯鈦酸壓電陶瓷( pzt )有較好的機電耦合系數、壓電常數、機械品質因數、居里溫度和穩定性等,因此, pzt能廣泛應用于智能材料結構中。
The influence that the zr / ti ratios have on the ceramic crystal structure and its properties are studied through the research carried out about the relative respects of the fabricated samples . the increase of zr / ti ratio can result in the crystal structure transformation from the tetragonal to the rhombohedral , it can also induce the weakness in the stability of the ceramic crystal structure , for example , the drop in the curie temperature . in order to enhance the relative low mechanical quality factor of pzn - pzt system piezoceramics , component addition pb ( mn1 / 3sb2 / 3 ) o3 ( hereafter abbreviated as pms ) are introduced in to form a new psudo - tetragonal system ceramics 為獲得具有高的機電耦合系數kp ,高的機械品質因數qm的高性能壓電陶瓷,采用二次合成法制備了不同zr ti比的鈮鋅酸鉛-鋯鈦酸鉛基( pzn - pzt )三元系壓電陶瓷材料,研究了zr ti比變化對陶瓷結構和性能的影響規律,發現zr ti比增大除了可以使陶瓷的相結構由四方相向三方相轉化外,還降低了陶瓷的結構的穩定性,使tc溫度下降。