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首页> 外文会议>Conference Series no.182; International Symposium on the Science and Technology of Light Sources; 20040718-22; Toulouse(FR) >Thermochemical investigations of the system NaI-TlI-InI and its relevance for high pressure metal halide lamps
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Thermochemical investigations of the system NaI-TlI-InI and its relevance for high pressure metal halide lamps

机译：NaI-TlI-InI系统的热化学研究及其与高压金属卤化物灯的相关性

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摘要

The investigations on the system NaI-TlI-InI have shown that formation of hetero complexes can be observed in all corresponding quasi-binary systems. As figure 1 shows the stability of the sodium containing complex molecules is significantly higher than that of TlInI_2(g). It is known from other investigations, that the alkali metals form stable gaseous hetero complexes. The formation of the complexes NaInI_2(g), NaTlI_2(g) and TlInI_2(g) leads to a significant enhancement of the metal cations in the gas phase. Due to the low volatility of NaI compared with TlI and InI, the highest increase is experienced with sodium. As a consequence the colour temperature of such lamps will decrease. Calculations for coldest spot temperatures between 1000K and 1200K show that 6 to 16 per cent of the sodium concentration in the gas phase result from complex formation. This fraction decreases with increasing temperature.
机译：对系统NaI-TlI-InI的研究表明，在所有相应的准二元系统中都可以观察到杂合物的形成。如图1所示，含钠复合分子的稳定性显着高于TlInI_2（g）。从其他研究可知，碱金属形成稳定的气态杂配合物。 NaInI_2（g），NaTlI_2（g）和TlInI_2（g）配合物的形成导致气相中金属阳离子的显着增强。由于NaI的挥发性低于TlI和InI，因此钠的增加最大。结果，这种灯的色温将降低。对1000K至1200K之间最冷点温度的计算表明，气相中钠浓度的6％至16％是由复合物形成引起的。该分数随温度升高而降低。

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