| タイトル | Growth of binary organic NLO crystals: m.NA-p.NA and m.NA-CNA system |
| 本文（外部サイト） | http://hdl.handle.net/2060/19960008848 |
| 著者（英） | Hopkins, R. H.; Singh, N. B.; Mazelsky, R.; Henningsen, T. |
| 著者所属（英） | NASA Marshall Space Flight Center |
| 発行日 | 1993-01-01 |
| 言語 | eng |
| 内容記述 | Experiments were carried out to grow 3.Nitroaniline (m.NA) crystals doped with 4.Nitroaniline (p.NA) and 2.chloro 4.Nitroaniline (CNA). The measured undercooling for m.NA, p.NA, and CNA were 0.21 tm K, 0.23 tm K, and 0.35 tm K respectively, where tm represents the melting temperature of the pure component. Because of the crystals' large heat of fusion and large undercooling, it was not possible to grow good quality crystals with low thermal gradients. In the conventional two-zone Bridgman furnace we had to raise the temperature of the hot zone above the decomposition temperature of CNA, p.NA, and m.NA to achieve the desired thermal gradient. To avoid decomposition, we used an unconventional Bridgman furnace. Two immiscible liquids, silicone oil and ethylene glycol, were used to build a special two-zone Bridgman furnace. A temperature gradient of 18 K/cm was achieved without exceeding the decomposition temperature of the crystal. The binary crystals, m.NA-p.NA and m.NA-CNA, were grown in centimeter size in this furnace. X-ray and optical characterization showed good optical quality. |
| NASA分類 | SOLID-STATE PHYSICS |
| レポートNO | 96N16014
NASA-TM-111073
NAS 1.15:111073 |
| 権利 | No Copyright |
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