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FT15W Trimming
PIEZO ELEMENT SPECIFICATION
Customer: | Part No: | |||||
Product: Piezoelectric elements | DT Part No: FT15W30-8.0(切邊） | |||||
一、Configuration | ||||||
Appearance and dimension: see the drawing | ||||||
Material | Piezo electric | |||||
Configuration | 1:plane√ 2:discal | |||||
Electrode form | A: fullness √ B: feedback | |||||
Metal material | T: brass√ G: stainless steel F: fe | |||||
二，Electrical specification | ||||||
Resonant frequency (kHz) | FS=8.0±0.5 | |||||
Resonant impedance (Ω) | Rr≤500Ω | |||||
Capacitance at 120Hz (PF) | Cm=10000±30% | |||||
Operating temperature (℃) | -30～+60 | |||||
Storage temperature (℃) | -30～+70 | |||||
Piezoelectric elements Manual Soldering process | Soldering Parameter | |||||
Temp.( 0C) | Time(Sec.) | Times | ||||
Inclusive Lead | silver electrode | 280±10 | 1.5 second or less. | 1~2 | ||
metal plate | 320±10 | 2 second or less. | 1~2 | |||
Lead Free | ★ | silver electrode | 310±10 | 2 second or less. | 1~2 | |
★ | metal plate | 330±10 | 3 second or less. | 1~2 | ||
Solder Dot: Diameter MAX 3.0mm, High MAX 1.5mm, Soldering sequence: 1、 silver electrode 2、 metal plate | ||||||
Remark: ★ DT Instance Soldering Process
APPEARANCE UNIT：mm
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備注：線材UL1571AWG32#
MORE SPECIFICATIONS FOR
PIEZOELECTRO TRANSDUCER
1、Oscillating system
Basically, sound source of a piezoelectric sound component is a piezoelectric diaphragm consists of a piezoelectric ceramic plate which have electrodes on both sides and a metal plate (brass or stainless steel etc.).
When alternating voltage is applied to piezoceramic element, the element expands or shrinks diametrically. This characteristic is utilized to make vibration plate bend to generate sounds.
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2、Soldering procedures
A lead wire is needed to apply voltage to the piezoelectric diaphragm. When using a soldering iron, the optimum temperature for soldering a lead wire to a metal plate is 280±100C for 3 seconds and the same temperature for the ceramic silver electrode for 1～1.5 second or less. The lead wire should be as fine as possible, as it works as a load restricting oscillation of the piezoelectric diaphragm.
Hight 1.5mm MAX
a. Test condition: Solder Dot
Diameter 2.5m-3.0mm MAX
b. .png "4(11).png")
Characteristics
1、 Perpendicular pull
Thickness Of Ceramic | Weight (g) |
0.10mm | 400 |
0.15---0.25mm | 700 |
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2、Horizontal pull
Thickness Of Ceramic | Weight (g) |
0.10mm | 700 |
0.15---0.25mm | 2000 |
Lead wire
3、characteristics and measuring method
Characteristics
TYPE | Resonant frequency | Resonant impedance | Capacitance | Insulation resonance |
Piezoceramic element | ● | ● | ● | ● |
b. Measuring Procedure
When the piezoelectric diaphragm oscillates freely in air, the node does not move as show in fig.5 and fig.6.With this point held with a measuring terminal, the resonant frequency and resonant impedance are measured in the constant-current circuit.
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4、Reliability Test
ITEM | TEST CONDITION AND REQUIREMENT | |
4.1 | High Temperature Test 高溫測試 | 將蜂鳴片置于 70±2℃ 中，試驗保溫時間不少于30min，在高溫下測試。 允許諧振頻率的變化值: ±15%, 自由電容的變化值: ±30%. |
4.2 | Low Temperature Test 低溫測試 | 將蜂鳴片置于 -10±2℃ 中，試驗保溫時間不少于30min，在低溫下測試。 允許諧振頻率的變化值: ±15%, 自由電容的變化值: ±30%. |
4.3 | Test Temperature Cycle Test 溫度循環(huán)測試 | 蜂鳴片在-10℃暴露30min, 在70℃暴露30min，五次循環(huán)后，試驗后在常溫下恢復(fù)1h，電性能變化符合以下： 諧振頻率的變化值: ±10%, 自由電容的變化值: ±20% |
4.4 | Humidity 濕熱 | 蜂鳴片置于溫度在+32℃，相對濕度在90%-5%~90%+5%中，保持96h后，試驗后在常溫下恢復(fù)2h測試，電性能變化符合以下： 諧振頻率的變化值: ±10%, 自由電容的變化值: ±20% |
4.5 | Drop Test 跌落 | 將蜂鳴片放置在水平位置，金屬片的一面朝下，從1000mm高度自由跌落到硬木版上，跌落兩次后，檢查外觀并測量電性能。 蜂鳴片應(yīng)符合規(guī)格書要求。 |
4.6 | Vibration Test 振動 | 將蜂鳴片置于10~55Hz、振幅在0.35mm、掃頻循環(huán)5次振動等級中，在兩個互相垂直的軸線方向上振動試驗后，應(yīng)無機械損傷，電性能變化符合規(guī)格書要求。 |
4.7 | Silver Solderability Test 銀層焊接強度 | 用20W內(nèi)熱式電烙鐵，HISnPb39焊錫絲，松香酒精焊劑，焊接時間小于5s，焊接面積3m㎡~5m㎡，焊接點堆積高度小于2mm，在蜂鳴片銀層面上，按垂直和水平方向焊接兩根與蜂鳴片成90°±5°和180°±5°的導(dǎo)線，在導(dǎo)線上施加以下負(fù)荷，負(fù)荷時間為10s±1s。 通常在蜂鳴片銀層上焊接Φ0.15×7多股導(dǎo)線，垂直方向能夠承受2.5N拉力，水平方向能承受25N拉力，銀層無機械損傷為合格。 |
4.8 | Adhesive strength 粘結(jié)強度 | 用直徑與壓電陶瓷片相同的圓柱體金屬棒，長度為60mm左右，把蜂鳴片的金屬面貼在金屬棒的曲面上，將其壓至與曲面相吻合后，檢查外觀。蜂鳴片經(jīng)折彎一次后，應(yīng)無瓷片脫落和翹起現(xiàn)象，但允許龜裂。 |
