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壓電振膜的電極一般是銀製成的,銀與空氣中的硫發生化學反應會導致變色(從銀色變成棕色)。這會對焊接能力產生不利影響,因此在使用前請檢查。
另外,如果徒手觸碰壓電圖,會留下指紋,並會導致變色。因此,接觸壓電振膜時,需要考慮穿戴指套、防靜電指套、手套或防靜電手套。