| 摘要 |
<p>PURPOSE:To uniform and stable thermions by using a zirconium carbide whisker or a whisker composed primarily of zirconium cabide. CONSTITUTION:A single crystal needle-like hot-cathode has an electron-radiating material composed of zirconium carbide whisker or a zirconium carbide-dominated zirconium whisker, having regular quadranglar, regular hexagonal-columnar, or regular octagonal-columnar form. The zirconium carbide-dominated whisker contains at least one selected from titanium, hafnium, niobium, and tantalum.</p> |
