Acquisition of a dilatometer for accurate measurement of thermal expansivity of geologically relevant materials over -180 to 2000oC

购买膨胀计，用于精确测量 -180 至 2000oC 范围内的地质相关材料的热膨胀率

• 批准号: 1255774
• 负责人: Anne Hofmeister
• 金额: $ 12.26万
• 依托单位: Washington University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-03-15 至 2014-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1255774&HistoricalAwards=false
• 关键词: Acquisition; dilatometer; accurate; measurement; thermal

1255774HofmeisterThis Division of Earth Sciences Instrumentation and Facilities Program grant supports acquisition of push rod dilatometer capable of high precision measurements of the thermal expansivity of minerals, glasses and materials over a broad range of temperatures (180 ? 2000 deg C ) relevant to study of the thermal evolution of deep Earth and crustal phases. This would be the first such instrument of its kind in an Earth Sciences academic research department. The effect of temperature on the expansion and contraction of Earth materials is a fundamental property needed to constrain models of mantle convection. Few reliable data of thermal expansivity of deep Earth phases exist that were acquired at in situ temperature conditions and with sufficient confidence to provide realistic constraints on geodynamic models. The PI would use the instrument to develop an extensive database on the thermal expansivity of a wide range of geomaterials starting first with well characterized single-crystals phases and glasses relevant to the Earth's crust and mantle. The PI intends to engage students in experiential learning through hands on measurements.***

1255774Hofmeister地球科学仪器和设施计划拨款支持购买推杆膨胀计，能够高精度测量矿物、玻璃和材料在广泛温度范围（180 - 2000 摄氏度）下的热膨胀率，与热研究相关地球深处和地壳相的演化。 这将是地球科学学术研究部门中第一个此类仪器。 温度对地球材料膨胀和收缩的影响是约束地幔对流模型所需的基本属性。 很少有可靠的地球深相热膨胀率数据是在原位温度条件下获得的，并且有足够的信心为地球动力学模型提供现实的约束。 项目负责人将使用该仪器开发一个关于各种地质材料热膨胀性的广泛数据库，首先从与地壳和地幔相关的特征良好的单晶相和玻璃开始。 PI 打算让学生通过动手测量进行体验式学习。***