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公开(公告)号：US4458172A
公开(公告)日：1984-07-03
申请号：US406015
申请日：1982-08-06
IPC分类号： B06B1/06 , H01L41/187 , G10K11/36 , H01L41/18
CPC分类号： B06B1/0622 , H01L41/187
摘要： An ultrasonic probe includes a resonator made of a piezoelectric ceramic material which is obtained by subjecting a ceramic composition containing 44.7 to 46.3 mol % of PbO, 50.9 to 51.7 mol % of TiO.sub.2, 1.8 to 2.7 mol % of Sm.sub.2 O.sub.3 and 0.5 to 1.0 mol % of MnO.sub.2 to poling treatment in such a manner that the ceramic composition is applied with an electric field of 60 to 80 kV/cm at a temperature of 130.degree. to 160.degree. C.
摘要翻译： 超声波探头包括由压电陶瓷材料制成的谐振器，该共振器通过使含有44.7〜46.3摩尔％的PbO，50.9〜51.7摩尔％的TiO 2，1.8〜2.7摩尔％的Sm 2 O 3和0.5〜1.0摩尔％的陶瓷组合物， 的MnO 2以使陶瓷组合物在130〜160℃的温度下施加60〜80kV / cm的电场的方式进行极化处理。
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公开(公告)号：US4243541A
公开(公告)日：1981-01-06
申请号：US940219
申请日：1978-09-06
申请人： Hiroshi Takeuchi , Yukio Ito , Shigeru Jyomura , Kunio Yamashita , Kazuyuki Nagatsuma , Sakichi Ashida , Mitsuru Ishii
发明人： Hiroshi Takeuchi , Yukio Ito , Shigeru Jyomura , Kunio Yamashita , Kazuyuki Nagatsuma , Sakichi Ashida , Mitsuru Ishii
IPC分类号： H01L41/187 , C04B35/46
CPC分类号： H01L41/187
摘要： Piezoelectric ceramics containing PbO and TiO.sub.2 as its principal constituents, and further containing 0.5 to 3.7 mol-% of Nd.sub.2 O.sub.3 and 0.2 to 1.5 mol-% of MnO.sub.2. Since the piezoelectric ceramics is low in the dielectric constant and is especially small in the temperature coefficient of the delay of surface acoustic waves, it is suitable for a surface acoustic wave device. Piezoelectric ceramics in which 0.3 to 3.3 mol-% of In.sub.2 O.sub.3 is further added to the above-mentioned composition has a still smaller temperature coefficient of the delay of surface acoustic waves, and it is also possible to make this coefficient zero.
摘要翻译： 含有PbO和TiO2作为主要成分的压电陶瓷，还含有0.5〜3.7mol％的Nd2O3和0.2〜1.5mol％的MnO2。 由于压电陶瓷的介电常数低，表面声波延迟的温度系数特别小，所以适用于表面声波装置。 在上述组合物中进一步添加0.3〜3.3mol％的In2O3的压电陶瓷的表面声波的延迟温度系数更小，也可以使该系数为零。
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公开(公告)号：US4595853A
公开(公告)日：1986-06-17
申请号：US552815
申请日：1983-11-17
CPC分类号： G01H1/00 , H03H9/02559
摘要： An apparatus for and a method of non-destructively determining properties of a SAW substrate, in which first and second interdigital transducers are formed in a spaced relationship on a single common piezoelectric substrate, a blocking member is formed between said transducers on the substrate for preventing an acoustic wave signal from being transferred between said transducers via the common substrate, spacers are provided for supporting a to-be-determined SAW substrate above the common substrate with a spacing left between the SAW substrate and the fingers of transducers, the SAW substrate to be placed on the spacers is positioned with respect to the transducers so that co-directional mode coupling will, in operation, effectively take place between the SAW substrate and the transducers, adherence between the SAW substrate and the spacers is secured to enhance the co-directional mode coupling, an electric signal is applied to the first transducer for transferring, due to the co-directional mode coupling, an acoustic signal to the SAW substrate along the surface of which the acoustic signal will propagate and will be transferred, due to the co-directional mode coupling, to the second transducer, and the output of the second transducer is measured.
摘要翻译： 一种用于非破坏性地确定SAW基板的特性的装置和方法，其中第一和第二叉指式换能器在单个公共压电基片上以间隔的关系形成，阻挡构件形成在基板上的所述换能器之间，用于防止 通过公共衬底在所述换能器之间传递的声波信号，用于在公共衬底上方支撑待确定的SAW衬底，间隔物留在SAW衬底和换能器的指状件之间，SAW衬底 放置在间隔物上相对于换能器定位，使得在SAW衬底和换能器之间有效地发生操作中的同向模式耦合，从而确保SAW衬底和衬垫之间的粘附， 方向模式耦合，由于共同方向，电信号被施加到第一换能器以进行传送 声耦合，声表面基底沿声表面的声信号将传播并由于同向模式耦合而传播到第二换能器，并测量第二换能器的输出。
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4.发明授权
公开(公告)号：US4333842A
公开(公告)日：1982-06-08
申请号：US178593
申请日：1980-08-15
CPC分类号： G10K11/36 , C30B15/00 , C30B29/34 , H01L41/18 , H01L41/1871
摘要： A piezoelectric single crystal which has a composition represented by a general formula (Ba.sub.2-x Sr.sub.x)TiSi.sub.2 O.sub.8, the value x lying within a range of 0.25.ltoreq.x.ltoreq.1.2; and a surface acoustic wave element which is so constructed as to employ surface waves that propagate on a cut plane perpendicular to the Z-axis of the single crystal, or surface waves that propagate in a specified direction on a cut plane containing the X-axis of the single crystal. The piezoelectric single crystal and the surface acoustic wave element employing it have the merits that the electromechanical coupling factor of the surface acoustic waves is great and that the temperature coefficient of delay time of the surface acoustic waves is small.
摘要翻译： 具有由通式（Ba2-xSrx）TiSi2O8表示的组成的压电单晶，其值x在0.25≤x≤1.2的范围内; 以及表面声波元件，其被构造成采用在垂直于单晶的Z轴的切割平面上传播的表面波，或者在包含X轴的切割平面上在指定方向上传播的表面波 的单晶。 使用它的压电单晶和表面声波元件具有表面声波的机电耦合系数大，表面声波的延迟时间的温度系数小的优点。
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公开(公告)号：US4490641A
公开(公告)日：1984-12-25
申请号：US278729
申请日：1981-06-29
申请人： Hiroshi Takeuchi , Shigeru Jyo mura , Kazuyuki Nagatsuma , Mitsutaka Hikita , Yukio Ito , Sakichi Ashida
发明人： Hiroshi Takeuchi , Shigeru Jyo mura , Kazuyuki Nagatsuma , Mitsutaka Hikita , Yukio Ito , Sakichi Ashida
CPC分类号： H03H9/562
摘要： The piezoelectric resonator of this invention consists of a piezoelectric ceramic plate which is polarized in the direction of thickness over the entire plate, two split electrodes are formed on one main surface of the piezoelectric ceramic plate, and an electrode is formed on the entire main surface opposed to the above main surface on which are formed the split electrodes. When an operating voltage is supplied to the above two split electrodes, the piezoelectric ceramic plate between the two split electrodes and the other electrode undergoes resonance in a thickness dilatational mode with a phase difference of 180.degree..
摘要翻译： 本发明的压电谐振器由在整个板上的厚度方向上极化的压电陶瓷板组成，在压电陶瓷板的一个主表面上形成两个分离电极，并且在整个主表面上形成电极 与形成分割电极的上述主表面相对。 当向上述两个分割电极提供工作电压时，两个分离电极和另一个电极之间的压电陶瓷板在相位差为180度的厚度膨胀模式下经历谐振。
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