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首页> 外文会议>International topical meeting on nuclear plant instrumentation, control, and human-machine interface technologies >HIGH TEMPERATURE INFRARED GLASSES FOR OPTICAL SENSING IN ADVANCED REACTORS
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HIGH TEMPERATURE INFRARED GLASSES FOR OPTICAL SENSING IN ADVANCED REACTORS

机译：先进反应器中用于光学传感的高温红外玻璃

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Non-oxide glasses are being developed for infrared fiber-based sensor (IRFS) designs. Non-oxide glasses for transmitting infrared light, such as As_2Se_3, are available commercially; however, chalcogenide compositions generally exhibit relatively low glass transition temperatures, T_g's, (～200°C) that severely limit their useful working temperature. New non-oxide compositions are being investigated to identify glasses with T_g's in excess of 1000°C, to meet the demanding requirements of high-temperature sensing applications. Glasses were fabricated and analyzed for oxygen contamination using infrared spectroscopy and the T_g's and glass crystallization temperatures, T_c's, were obtained from differential thermal analysis (DTA). Four glasses were produced with a general composition xBaS+yLa_2S_3+ (100-x-y)GeS_2. The glasses studied included the base glass GeS_2, two binary eutectic La_2S_3-GeS_2 glasses, and a ternary glass 5-5-90, where x = y = 5. The highest T_g obtained was for the 0-40-60 glass, however the 5-5-90 composition showed a significant increase in T_gfor only 10 mol% total modifier, BaS + La_2S_3. In comparing the 0-7.5-92.5 and the 5-5-90 glass compositions, the T_g difference was about +150°C, which suggests that the chemical interactions between the two modifiers, BaS and La_2S_3, must be significantly strengthening the network. Unfortunately, increases in T_g, came at the expense of reduced glass forming ability, as observed by the T_c decrease and tendency to crystallize after heating the glass above Tg,. Further study is underway to maximize T_g and minimize the crystallization potential by using optimum ratios of the two composition modifiers.
机译：正在为基于红外光纤的传感器（IRFS）设计开发非氧化物玻璃。商业上可以买到用于透射红外光的非氧化物玻璃，例如As_2Se_3。然而，硫族化物组合物通常表现出相对较低的玻璃化转变温度T_g（〜200°C），这严重限制了其有用的工作温度。正在研究新的非氧化物成分，以识别T_g超过1000°C的玻璃，以满足高温传感应用的苛刻要求。制备玻璃并使用红外光谱法分析氧污染，并从差热分析（​​DTA）获得T_g和玻璃结晶温度T_c。制备了四种玻璃，其总体组成为xBaS + yLa_2S_3 +（100-x-y）GeS_2。研究的玻璃包括基本玻璃GeS_2，两个二元共晶La_2S_3-GeS_2玻璃和三元玻璃5-5-90，其中x = y =5。获得的最高T_g是0-40-60玻璃，但是5-5-90的组成表明，仅10 mol％的总改性剂BaS + La_2S_3的T_g显着增加。在比较0-7.5-92.5和5-5-90玻璃组成时，T_g差约为+ 150°C，这表明两种改性剂BaS和La_2S_3之间的化学相互作用必须显着增强网络。不幸的是，T_g的增加是以降低玻璃形成能力为代价的，如通过T_c的降低所观察到的，并且在将玻璃加热至高于Tg 1以后，其趋向于结晶。通过使用两种组成改性剂的最佳比例，正在进行进一步的研究以最大化T_g并最小化结晶潜力。

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