Large volume multianvil cell assembly for hydrothermal synthesis and conversions up to 6.5 GPa and 400°C

IF 1.2 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

High Pressure Research Pub Date : 2023-07-03 DOI:10.1080/08957959.2023.2230348

Logan J. Leinbach, Isaac R. Rhoden, K. Leinenweber, O. Andersson, A. Gordeeva, U. Häussermann

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引用次数: 0

Abstract

ABSTRACT A multianvil cell assembly with octahedral edge length 25 mm has been adapted for high pressure investigations involving water-rich environments up to 6.5 GPa and 400°C. Water-rich samples are confined in Teflon containers with a volume up to 300 mm3. Applicability tests were performed between 250 and 400°C by investigating the transformation of amorphous titania particles close to the rutile–TiO2-II (∼5 GPa) phase boundary, and the transformation of amorphous silica particles close to the quartz–coesite (∼2.5 GPa) and coesite–stishovite (∼7 GPa) phase boundaries. The performed experiments employed 25.4 mm tungsten carbide anvils with a truncation edge length of 15 mm. The sample pressure at loads approaching 820 t was estimated to be around 6.5 GPa. The large volume multianvil cell is expected to have broad and varied application areas, ranging from the simulation of geofluids to hydrothermal synthesis and conversion/crystal growth in aqueous environments at gigapascal pressures.

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用于水热合成和转化率高达6.5的大体积多环境电池组件 GPa和400°C

摘要八面体边长为25的多环境单元组件 mm已适用于涉及高达6.5的富水环境的高压研究 GPa和400°C。富含水的样品被限制在体积高达300 mm3的聚四氟乙烯容器中。适用性测试是在250和400°C之间进行的，通过研究接近金红石-TiO2 II（~5 GPa）相边界，以及靠近石英-柯石英矿的无定形二氧化硅颗粒的转变（～2.5 GPa）和球藻石-stishovite（～7 GPa）相边界。所进行的实验采用25.4 mm碳化钨砧，截边长度为15 mm。在接近820t的载荷下，样品压力估计约为6.5 GPa。大体积多环境电池预计将具有广泛而多样的应用领域，从模拟地质流体到在千兆帕压力下的水环境中的水热合成和转化/晶体生长。

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来源期刊

High Pressure Research 物理-物理：综合

CiteScore

3.80

自引率

5.00%

发文量

审稿时长

2 months

期刊介绍： High Pressure Research is the leading journal for research in high pressure science and technology. The journal publishes original full-length papers and short research reports of new developments, as well as timely review articles. It provides an important forum for the presentation of experimental and theoretical advances in high pressure science in subjects such as: condensed matter physics and chemistry geophysics and planetary physics synthesis of new materials chemical kinetics under high pressure industrial applications shockwaves in condensed matter instrumentation and techniques the application of pressure to food / biomaterials Theoretical papers of exceptionally high quality are also accepted.