Type: | Piezoelectric Ceramic |
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Production Process: | Ceramics |
Sensitivity: | High |
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The principle of piezoelectric ceramic energy converter is that when the pressure or tension is applied to the ceramic chip, the opposite polarity charge will be generated at both ends of the ceramic chip, and the current will be generated through the circuit. This effect is called piezoelectric effect. Therefore, in the design of ultrasonic transducer, various factors should be considered, such as acoustic impedance, frequency response, impedance matching, acoustic structure, vibration mode and conversion material, and how to design and coordinate these factors, so as to achieve the best value of electroacoustic conversion. As a kind of energy transmission network, piezoelectric ceramic transducer has the problem of energy conversion efficiency.
Conversion efficiency is related to transducer material, vibration form, structure of mechanical vibration system (including support mechanism) and selection of working frequency. Therefore, the problem of ultrasonic transmitter is solved. There are two kinds of piezoelectric transducer materials: magnetostrictive metal and piezoelectric ceramic. Piezoelectric ceramic transducer is a kind of electronic ceramic material with piezoelectric characteristics. The main difference between piezoelectric quartz crystal and typical piezoelectric quartz crystal without ferroelectric component is that the crystal phase of its main component is ferroelectric crystal. Because ceramics are polycrystalline aggregates with randomly oriented grains, the spontaneous polarization vector of each ferroelectric crystal is also disoriented.
If the transducer made of this kind of piezoelectric ceramic is put into water, then under the action of sound wave, the electric charge will be induced at both ends of the transducer, which is the sound wave receiver. In addition, the piezoelectric effect is reversible. If the alternating electric field is applied to the piezoelectric ceramic sheet, the ceramic sheet will become thinner and thicker from time to time, and generate vibration and sound wave. In order to make the ceramics show the macroscopic piezoelectric characteristics, the piezoelectric ceramics must be polarized in the strong direct current electric field after firing, and the end face is subject to multiple electrodes, so the polarization vector of the original disordered orientation is preferentially oriented in the electric field direction. After the electric field is eliminated, the piezoelectric ceramics after polarization treatment will maintain a certain degree of macroscopic residual polarization strength, so that the ceramics have a certain pressure.
Specification | Dimension | Radial Frequency | Capacitance | Electromechanical coupling coefficient | Piezoelectric voltage coefficient | Dielectric |
(mm) | (fs) | (pF) | (Kr) | ( d33) | dissipation factor | |
(tanδ) | ||||||
OKS-JYJP-1052 | Φ10×Φ5×2 | 145KHz±5% | 330 ±12.5% | 0.54 | 260 | ≤0.6 |
OKS-JYJP-1051 | Φ10×Φ5×1 | 150KHz±5% | 310±12.5% | 0.31 | 200 | ≤0.3 |
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specification | Dimension | Radial frequency | Capacitance | Dielectric dissipation factor | Electromechanical coupling coefficient | Impedance | Thickness frequency | Mechanical |
(mm) | (KHz) | (pf) | tanδ(%) | (Kr) | Zr(Ω) | (KHz)) | quality factor | |
(Qm) | ||||||||
OKS-YHJP-25103 | Φ25×Φ10×3 | 66.4 | 1240±12.5% | ≤0.3 | ≥0.46 | ≤15 | 683±5% | 800 |
OKS-YHJP-25104 | Φ25×Φ10×4 | 66.4 | 930±12.5% | ≤0.3 | ≥0.46 | ≤15 | 512±5% | 800 |
OKS-YHJP-40125 | Φ40×Φ12×5 | 45.9 | 2070±12.5% | ≤0.3 | ≥0.46 | ≤15 | 410±5% | 800 |
OKS-YHJP-40155 | Φ40×Φ15×5 | 42.2 | 1960±12.5% | ≤0.3 | ≥0.46 | ≤15 | 323±5% | 500 |
OKS-YHJP-40176 | Φ40×Φ17×6 | 40.5 | 1555±12.5% | ≤0.3 | ≥0.46 | ≤15 | 341±5% | 800 |
OKS-YHJP-40205 | Φ40×Φ20×5 | 37.9 | 1700±12.5% | ≤0.3 | ≥0.47 | ≤15 | 410±5% | 800 |
OKS-YHJP-50206 | Φ50×Φ20×6 | 33.2 | 2490±12.5% | ≤0.3 | ≥0.46 | ≤15 | 341±5% | 500 |
OKS-YHJP-501765 | Φ50×Φ17×6.5 | 34.8 | 2430±12.5% | ≤0.3 | ≥0.46 | ≤15 | 315±5% | 800 |
OKS-YHJP-50236 | Φ50×Φ23×6 | 31.2 | 2340±12.5% | ≤0.3 | ≥0.47 | ≤15 | 341±5% | 800 |
OKS-YHJP-50276 | Φ50×Φ27×6 | 29.3 | 2100±12.5% | ≤0.3 | ≥0.47 | ≤15 | 341±5% | 800 |
OKS-YHJP-603010 | Φ60×Φ30×10 | 25.3 | 1922±12.5% | ≤0.3 | ≥0.47 | ≤18 | 205±5% | 800 |
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Specification | Dimension | Radial frequency | Capacitance | Dielectric dissipation factor | Impedance | Kr | Mechanical |
(mm) | (KHz) | (±12.5%)pF | tanδ(%) | (Ω) | quality factor | ||
(Qm) | |||||||
OKS-QXJP3030 | Φ30×3.0 | 66.7 | 2730 | ≤0.3 | ≤15 | ≥0.55 | 500 |
OKS-QXJP3530 | Φ35×3.0 | 63 | 3100 | ≤0.3 | ≤15 | ≥0.55 | 500 |
OKS-QXJP3865 | Φ38×6.5 | 59.9 | 1580 | ≤0.3 | ≤15 | ≥0.55 | 500 |
OKS-QXJP4530 | Φ45×3.0 | 50 | 5100 | ≤0.3 | ≤15 | ≥0.55 | 500 |
OKS-QXJP4535 | Φ45×3.5 | 50 | 4700 | ≤0.3 | ≤15 | ≥0.55 | 500 |
OKS-QXJP5030 | Φ50×3.0 | 46 | 5800 | ≤0.3 | ≤15 | ≥0.55 | 500 |
OKS-QXJP5035 | Φ50×3.5 | 46 | 6300 | ≤0.3 | ≤15 | ≥0.55 | 500 |
OKS-QXJP5050 | Φ50×5.0 | 46 | 4150 | ≤0.3 | ≤15 | ≥0.55 | 500 |
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