| 摘要 |
<p>1,243,471. Utilizing energy of radiations; radio-active sources. ATOMIC ENERGY OF CANADA Ltd. 6 March, 1969 [2 Aug., 1968], No. 11980/69. Headings G6P and G6R. Beta emitting promethium 147 is deposited on a supporting substrate and provided with a thin protective coating, to form a nuclear battery. Promethium oxide is mixed with a reducing agent heated in a crucible within a vacuum chamber. The crucible is a hollow tantalum container with a hole in one wall through which the promethium metal vapour passes to be deposited as a thin film on a substrate near the crucible. The protective layer, of aluminium or titanium is deposited from an electrically heated filament.</p> |
