| 摘要 |
<p>A temperature gradient zone melting process wherein the temperature gradient is established substantially across only the molten zone (33) by preferentially heating the molten zone. In a specific embodiment, the mechanism for inputting heat to the molten zone (33) involves exposing a substrate (31) to optical radiation (32 or 32 and 38) of a wavelength and magnitude for which the molten zone is absorptive and the remainder of the body is transparent. The molten zone thereby migrates through the body toward the source of optical radiation. </p> |
