Electric mechanical conversion element
专利汇可以提供Electric mechanical conversion element专利检索，专利查询，专利分析的服务。并且PURPOSE: To increase the accuracy of positioning adjustment of magnetic head etc. by reducing the residual displacement, through the use of porcelain plate in normal dielectric phase within the operating temperature.
CONSTITUTION: As the electric mechanical conversion element used for high positioning control having high magnetic rod accuracy narrow in the recording track width for VTR etc., the material in which the residual polarization is less and the part comparatively greater dielectric constant is present at normal temperature is utilized as the normal dielectric phase at slightly higher temperature than the Curie temperature of a high dielectric porcelain. As an example, the porcelain plate 11 of a suitable size in which the Curie temperature is about -10°C and the dielectric constant at normal temperature is about 100000 is used, and the element 10 of bimorph construction is constituted by clipping the metal substrate 13 between two porcelain plates forming the electrodes 12a and 12b for the both major planes. The amount of residual displacement due to electrorestriction effect when the polarity of the applied voltage to the element 10 is inverted with the power supply 14, is about 1.4% to the maximum amplitude, and it is less around one digit than utilizing the piezoelectric effect of the ferrodielectric porcelain and the positioning adjustment of head can be made with good accuracy.
COPYRIGHT: (C)1979,JPO&Japio，下面是Electric mechanical conversion element专利的具体信息内容。
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