| 摘要 |
<p>302,726. Telefunken Ges. f³r Drahtlose Telegraphie. Dec. 21, 1927, [Convention date]. Thermo-electric batteries. - A piezo-electric pyro-electric body is made by subjecting finely divided solid material, for exampe quartz powder, to an electric field to cause the particles to take up a definite direction with respect to their electric moments. The particles are bound together by strong heating and high pressure, or by a binding-material, such as paraffin wax, or by both means. The dielectrics are made in thin layers which are provided with electrodes and arranged in parallel or series to increase the piezo-electric or pyro-electric activity.</p> |
