High-Temperature Differential Scanning Calorimetry

高温差示扫描量热法

• 批准号: 0404605
• 负责人: Mark Schlesinger
• 金额: $ 16.4万
• 依托单位: Missouri University of Science and Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-08-15 至 2007-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0404605&HistoricalAwards=false
• 关键词: Temperature; Differential; Scanning; Calorimetry

This award by the Division of Materials Research to University of Missouri Rolla (UMR) is to investigate the usefulness and reliability of a high-temperature differential scanning calorimeter (HTDSC) to measure heat capacities and enthalpies of transition materials at temperatures of 1500 degrees C or higher. The investigation will measure the heat capacities of "unknowns" gold and ti-tanium oxide, using standard calibration procedures, comparing them against previously deter-mined values. The impact of sample heating rate, sample mass, choice of cover gas, and sample holder material on the accuracy and uncertainty level will be assessed, after recalibrating for each experimental condition. A second phase of the experimental program will examine the ability of HTDSC to measure enthalpies of transition, focusing on the enthalpy of melting of gold and that of the alpha-beta transition in neodymium oxide (Nd2O3). Determining the conditions un-der which the temperature and enthalpy change associated with these transitions can be accu-rately reproduced will improve the usefulness of HTDSC still further. The availability of HTDSC capability at UMR will facilitate cooperation with other research facilities measuring high-temperature Gibbs energies or enthalpies of formation of new ceramic or metallic phases.This investigation will establish appropriate experimental procedures for high-temperature dif-ferential scanning calorimeter (HTDSC) study of materials. In addition, research studies by this award will enhance U.S. capabilities in high-temperature research, and create a research protocol that can be used by undergraduates and high-school students as well as graduate assistants. This research will allow integration of HTDSC into existing programs at the University of Missouri - Rolla (UMR) for undergraduate research and interaction with high-school students.

材料研究部授予密苏里大学Rolla大学（UMR）的奖项是为了调查高温差分扫描量热仪（HTDSC）的有用性和可靠性，以测量在1500度C或更高更高温度下过渡材料的热能和过渡材料的焓。 该研究将使用标准校准程序来衡量“未知数”黄金和氧化ti-tanium氧化物的热容量，并将它们与先前的摩擦值进行比较。 针对每个实验条件重新校准后，将评估样品加热率，样品质量，覆盖气体选择和样品持有人材料对准确性和不确定性水平的影响。 实验计划的第二阶段将检查HTDSC测量过渡焓的能力，重点是黄金熔化的焓以及氧化新岛二险迪米岛（ND2O3）中的α-β转变的焓。 确定与这些转变相关的温度和焓变的条件可以得到重现，这将进一步提高HTDSC的有用性。 HTDSC能力在UMR中的可用性将有助于与其他研究设施的合作，以测量高温Gibbs能量或形成新的陶瓷或金属相的焓。这项研究将建立适当的实验程序，以建立适当的实验程序，以实现高温扩散扫描量表量表（HTDSC）研究材料的研究。 此外，该奖项的研究将增强美国在高温研究方面的能力，并创建一种研究方案，可以由本科生和高中生以及研究生助理使用。 这项研究将允许将HTDSC整合到密苏里大学 - Rolla（UMR）的现有计划中，以与高中生的本科研究和互动。