H2O loss during piston-cylinder experiments
H2O loss during piston-cylinder experiments
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DOI：
10.2138/am-1999-0909
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发表时间：
1999-09
影响因子：
3.1
通讯作者：
J. Truckenbrodt;W. Johannes
中科院分区：
文献类型：
--
作者：
J. Truckenbrodt;W. Johannes
在10 kbar和900-1100 °C的活塞-圆筒装置中测试了胶囊材料Au、Ag 75 Pd 25和Pt对C-H-O流体的渗透性。胶囊被嵌入氮化硼中。在实验之后，通过气相色谱法分析C-H-O流体以确定胶囊的氧含量。在≤1050 °C的温度下，在任何胶囊材料中均未观察到显著的氧损失。然而，在1100 °C（其高于Au和Ag 75 Pd 25在10千巴下的熔点）下，在6天的时间内，Pt胶囊的氧损失总计在12%和80%之间。这些结果通过使用纯H2O作为流体进行的实验证实。在活塞-气缸实验中，水损失是一个严重的问题。约1050 °C的温度代表恒定含H2O系统的热上限。
Abstract The capsule materials Au, Ag75Pd25, and Pt, were tested for permeability to C-H-O fluids in a piston-cylinder apparatus at 10 kbar and 900-1100 °C. The capsules were embedded in boron nitride. After the experiments, the C-H-O fluids were analyzed by gas chromatography to determine the oxygen content of the capsules. No significant loss of oxygen was observed in any capsule material at temperatures ≤1050 °C. At 1100 °C, however, which is above the melting point of Au and Ag75Pd25 at 10 kbar, oxygen loss from Pt capsules amounted to between 12 and 80%, over a period of 6 days. These results were confirmed by experiments performed using pure H2O as the fluid. Water loss during piston-cylinder experiments is a serious problem. A temperature of about 1050 °C represents the upper thermal limit for constant H2O-containing systems.