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首页> 外文期刊>Journal of Materials Research >Immiscibility between two rutile phases in the GeO_2-TiO_2 system and application as a temperature sensor in high-pressure experiments
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Immiscibility between two rutile phases in the GeO_2-TiO_2 system and application as a temperature sensor in high-pressure experiments

机译：GeO_2-TiO_2体系中两个金红石相之间的不溶性及其在高温实验中作为温度传感器的应用

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摘要

The system GeO2-TiO2 was studied experimentally at high pressure and temperature to measure the miscibility of the two components and to test its applicability as a temperature sensor in high-pressure experiments. Significant solubility between the two end-members was found, with two coexisting solid solutions at high pressure exhibiting mutual solubility that increases with temperature along a solvus. The two solid solution compositions at the solvus can be distinguished readily by X-ray diffraction. At higher temperatures, a complete solid solution exists between the two end-members. The complete solution occurs above a critical line in P-T space (a critical point at each pressure). The critical point is located near 1630 degrees C and mole fraction X-TiO2 = 0:57 at 6.6 GPa and changes by 60 +/- 5 degrees per GPa in the region from 4 to 7 GPa. A model for the shape of the solvus is developed using X-ray diffraction data points from a series of quench experiments and an in situ experiment, and the model is used to estimate the thermal gradients in a Kawai-type multianvil assembly.
机译：在高压和高温下对GeO2-TiO2系统进行了实验研究，以测量这两种组分的互溶性，并测试其在高温实验中作为温度传感器的适用性。发现在两个末端成员之间有显着的溶解性，高压下两种共存的固溶体表现出互溶性，该互溶性随着温度沿固溶体而增加。固溶体中的两种固溶体组成可以通过X射线衍射轻松区分。在较高的温度下，两个端构件之间存在完全的固溶体。完整的解决方案出现在P-T空间的临界线（每个压力的临界点）上方。临界点位于1630摄氏度附近，摩尔分数X-TiO2在6.6 GPa时为0:57，每GPa在4至7 GPa范围内变化60 +/- 5度。使用一系列淬火实验和原位实验的X射线衍射数据点开发了固溶体形状模型，并将该模型用于估算Kawai型多砧组件中的热梯度。

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  • 来源
    《Journal of Materials Research》 |2019年第19期|3368-3376|共9页
  • 作者

    Leinenweber Kurt; Stoyanov Emil; Malik Abds-Sami;

  • 作者单位

    Arizona State Univ Eyring Mat Ctr Tempe AZ 85287 USA;

    Hyper Mat & Technol Worthington OH 43085 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Ti; Ge; oxide;

    机译：TI;GE;oxide;

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