Test method for cyclic fatigue life under condition of piezoelectric ceramics force electric coupling
A technology of piezoelectric ceramics and testing methods, which is applied in the direction of testing the strength of materials by applying repetitive force/pulsation force, etc., can solve the problems of difficulty in guaranteeing residual strength, exaggerated fatigue, and the stress state of ball compression method is not a standard stress state, etc. To achieve the effect of simple and feasible test method
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Embodiment 1
[0027] This embodiment discloses a test method for the cyclic fatigue life of piezoelectric ceramics under electromechanical coupling conditions. The samples used in this method are obtained by the following method: using PZT52 / 48 bulk piezoelectric ceramics purchased in the market, cut A square piece with a thickness of about 1mm and a side length of 10mm was produced, then after rough grinding and fine grinding, and finally a sample with a thickness of about 0.7mm was made by single-sided polishing with 1μm diamond, and silver electrodes were plated on both sides.
[0028] Using load control to test the cyclic fatigue performance of PZT ceramics, the steps are as follows:
[0029] Step 1. Apply an AC electric field to the sample 5 through the lower guide mold 3 and the lower carrier mold 7 from the high-voltage power supply 9, the amplitude of the AC electric field is 600V / mm, and the frequency is 50Hz;
[0030] Step 2. Apply load-controlled cyclic fatigue loading to the sam...
Embodiment 2
[0034] This embodiment discloses a test method for the cyclic fatigue life of piezoelectric ceramics under electromechanical coupling conditions. The samples used in this method are obtained by the following method: using PZT52 / 48 bulk piezoelectric ceramics purchased in the market, cut A disc with a thickness of about 1mm and a diameter of 10mm was produced, then after rough grinding and fine grinding, and finally a sample with a thickness of about 0.5mm was made by single-side polishing with 1μm diamond, and silver electrodes were plated on both sides respectively.
[0035] Using load control to test the cyclic fatigue performance of PZT ceramics, the steps are as follows:
[0036] Step 1. Apply an AC electric field to the sample 5 through the lower guide mold 3 and the lower carrier mold 7 from the high-voltage power supply 9, the amplitude of the AC electric field is 600V / mm, and the frequency is 50Hz;
[0037] Step 2. Apply load-controlled cyclic fatigue loading to the sa...
Embodiment 3
[0041] This embodiment discloses a test method for the cyclic fatigue life of piezoelectric ceramics under electromechanical coupling conditions. The samples used in this method are obtained by the following method: using PZT52 / 48 bulk piezoelectric ceramics purchased in the market, cut A disc with a thickness of about 1mm and a diameter of 10mm is produced, then after rough grinding and fine grinding, and finally a sample with a thickness of about 0.3mm is made by single-side polishing with 1μm diamond, and silver electrodes are plated on both sides respectively.
[0042] Using load control to test the cyclic fatigue performance of PZT ceramics, the steps are as follows:
[0043] Step 1. Apply a DC electric field to the sample 5 through the lower guide mold 3 and the lower carrier mold 7 from the high-voltage power supply 9. The amplitudes of the DC electric fields are respectively -1000V / mm, and the negative electric field means that the direction of the electric field is opp...
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