Inspection process of qualified piezo buzzer element

Piezo bender element has small size, no contact, no noise, high reliability, low power consumption, low cost and good frequency characteristics. Therefore, piezoelectric buzzer element is widely used for alarm and vocal use of various electrical products. The most common ones are sounding devices on small electronic gadgets such as electronic watches, calculators, electronic doorbells and electronic toys. So how do you check out a qualified piezo film element.

1.Piezoelectric buzzer element inspection appearance, reference model, the judgment standard shall be subject to the specifications recognized by the customer.

3. The electrical performance test of the piezo diaphragm buzzer shall be based on the specifications recognized by the customer.

4.the reliability verification of electric piezo diaphragm piezoelectric film, mainly including vertical tensile force and adhesive strength. The vertical tensile force is related to the thickness of the silver layer. The thickness of the silver sheet is ≤0.13mm, the tensile force is 300g, and the time is 10s. The silver electrode has no mechanical damage and no shedding. The thickness of the silver sheet is ≥0.15mm, the tensile force is 500g, and the time is 10s. The silver electrode has no mechanical damage and no fall off. The test method of the adhesive strength is to use a cylindrical metal rod with the same diameter as the ceramic piece to be 60 mm long, and the metal surface of the buzzer sheet is attached to the curved surface of the metal rod, and is bent to conform to the curved surface. After bending, no ceramic sheet is bent. Shedding and lifting, but allowing cracking.

5.Packaging inspection of piezo electric piezo diaphragm piezoelectric buzzer tablets, buzzer sheets are packed in wax paper wrappers; products wrapped with wax paper are placed in foam trays; foam discs filled with products are packed in the packages using tape it is good.