| 摘要 |
<p>PURPOSE:To safely use an element for pressure sensor over a long period of time and to simply prepare said element, by using a composite wherein a silver film is closely adhered to the surface of a high strength electric insulating ceramic substrate. CONSTITUTION:Insulating ceramics used as a substrate pref. has compression strength of 50kg/mm<2> or more and is molded into an arbitrary shape such as a rod shape, a plate shape, a tubular shape or a square pillar shape before use. A silver film 2 has a thickness of 2-5mum, pref., 3-4mum and, for example, lead wires 4 are connected through metal caps 3 to both ends of the element, wherein the silver film 2 is formed to the surface of the ceramic rod 1 in a closely adhered state. When the pressure sensor thus constituted is arranged in a liquid pressure container and liquid pressure is changed, electric resistance changes in proportion and light power also changes. By this method, high liquid pressure can be measured safely and accurately over a long period of time.</p> |
