| 摘要 |
<p>In practice no sealing glasses are known with which glass or ceramic material having a coefficient of thermal expansion α 30-300°C in the range between 31 to 36 x 10<Sup>-7</Sup> per °C can be sealed together.</p><p>The invention provides bodies which are composed of at least two parts, these parts having been made from a material having a coefficient of expansion as mentioned above, the parts having been sealed together by means of a sealing glass containing 8-10 weight % vanadium pentoxide, 1.5-3.0 weight % copper(II)oxide, 1-3 weight % lead-(II)oxide, 0-1 weight % silicon oxide, 0-5 weight % aluminium oxide, 26-28 weight % boron oxide and 58-61 weight % zinc oxide. The weight ratio fo boron oxide to zinc oxide is in the range from 0.4 to 0.47.</p><p>The body is composed of parts (1 and 3), which have been sealed together by means of the selaing glass (2).</p> |
