Temperature compensated piezoelectric transducer assembly
    2.
    发明授权
    Temperature compensated piezoelectric transducer assembly 失效
    温度补偿压电换能器组件

    公开(公告)号:US4825117A

    公开(公告)日:1989-04-25

    申请号:US126138

    申请日:1987-11-27

    摘要: An apparatus for monitoring the curing of a fiber reinforced composite plastic which is cured at temperatures of the order of 350.degree. C. and an ultrasonic transducer assembly useful in the apparatus. The transducer assembly comprises a lithium niobate piezoelectric element having anisotropic coefficients of thermal expansion which is mounted on a metal base of the transducer assembly by means of a layer of structured copper. The structured copper is thermo-compression diffusion bonded to the lithium niobate element and to the metal base, and is compliant in a transverse direction to compensate for differential thermal expansions while affording good electrical and thermal conductivity and good acoustic coupling between the lithium niobate element and metal base.

    摘要翻译: 一种用于监测在350℃温度下固化的纤维增强复合塑料的固化的装置和在该装置中有用的超声换能器组件。 换能器组件包括具有各向异性热膨胀系数的铌酸锂压电元件,其通过结构化铜层安装在换能器组件的金属基座上。 结构化铜是热压缩扩散结合到铌酸锂元素和金属基底上,并且在横向方向上是柔性的,以补偿不同的热膨胀,同时提供良好的导电性和导热性,以及铌酸锂元素与铌酸锂元素之间良好的声耦合 金属底座。

    Cure monitoring apparatus having high temperature ultrasonic transducers
    3.
    发明授权
    Cure monitoring apparatus having high temperature ultrasonic transducers 失效
    具有高温超声波换能器的固化监测装置

    公开(公告)号:US4921415A

    公开(公告)日:1990-05-01

    申请号:US272358

    申请日:1988-11-15

    摘要: An apparatus for monitoring the curing of a fiber reinforced composite plastic which is cured at temperatures of the order of 350.degree. C. and an ultrasonic transducer assembly useful in the apparatus. The transducer assembly comprises a lithium niobate piezoelectric element having anisotropic coefficients of thermal expansion which is mounted on a metal base of the transducer assembly by means of a layer of structured copper. The structured copper is thermo-compression diffusion bonded to the lithium niobate element and to the metal base, and is compliant in a transverse direction to compensate for differential thermal expansions while affording good electrical and thermal conductivity and good acoustic coupling between the lithium niobate element and metal base.

    摘要翻译: 一种用于监测在350℃温度下固化的纤维增强复合塑料的固化的装置和在该装置中有用的超声换能器组件。 换能器组件包括具有各向异性热膨胀系数的铌酸锂压电元件,其通过结构化铜层安装在换能器组件的金属基座上。 结构化铜是热压缩扩散结合到铌酸锂元素和金属基底上,并且在横向方向上是柔性的,以补偿不同的热膨胀,同时提供良好的导电性和导热性,以及铌酸锂元素与铌酸锂元素之间良好的声耦合 金属底座。

    Fluid cooled solar powered photovoltaic cell
    5.
    发明授权
    Fluid cooled solar powered photovoltaic cell 失效
    流体冷却太阳能光伏电池

    公开(公告)号:US4361717A

    公开(公告)日:1982-11-30

    申请号:US213259

    申请日:1980-12-05

    摘要: Concentrated sunlight impinges on a large area photovoltaic device which is bonded to a highly pliable and thermally and electrically conductive structured copper strain relieving member; the lower face of the structured copper is sealed to a fluid cooled metal heat sink. Large power densities of sunlight are absorbed without appreciable temperature rise. The structured copper accommodates to the difference in expansion between the metal heat sink and the semiconductor wafer. Three embodiments utilize a single planar junction diode, an interdigitated diode, and series connected isolated junction diodes.

    摘要翻译: 集中的太阳光照射在一个大面积的光伏器件上,该光伏器件被粘结到一个高度柔韧的导热和导电结构的铜应变消除部件上; 结构化铜的下表面被密封到流体冷却的金属散热器。 阳光的大功率密度被吸收而没有明显的温度上升。 结构化铜适应于金属散热器和半导体晶片之间的膨胀差异。 三个实施例使用单个平面结二极管,交叉指示二极管和串联连接的隔离结二极管。