| 摘要 |
<p>PURPOSE:To prevent the generation of creeping flashover as well as to contrive improvement in switching surge withstand voltage by a method wherein a specific boron-silicate glass, having an excellent moisture-resisting property, oxidation-resisting property and heat-resisting property, is applied to the side face of a linear resistor. CONSTITUTION:The boron-silicate glass 13, which is mainly composed of zinc oxide and containing zinc oxide of 40-65wt.%, silicon oxide of 4-30wt.%, boron oxide of 10-20wt.% and lead oxide of 5-20wt.%, is baked on the side face of the oxide resistor 11 consisting of the sintered body containing aluminum oxide and magnesium oxide, and an electrode is formed on both upper and lower end faces of the oxide resistor 11. To be more precise, the glass containing zinc oxide is turned to crystal glass when it is baked, the mechanical strength of the glass layer against heat is enhanced, and the cracks generating on the glass can be prevented. As a result, the switching surge withstand voltage of the linear resistor can be improved.</p> |
