Shatskiy Anton, Yamazaki Daisuke, Morard Guillaume, Cooray Titus, Matsuzaki Takuya, Higo Yuji, Funakoshi Ken-ichi, Sumiya Hitoshi, Ito Eiji, Katsura Tomoo
Institute for Study of the Earth's Interior, Okayama University, Misasa, Tottori 682-0193, Japan.
Rev Sci Instrum. 2009 Feb;80(2):023907. doi: 10.1063/1.3084209.
A temperature of 3500 degrees C was generated using a diamond resistance heater in a large-volume Kawai-type high-pressure apparatus. Re and LaCrO(3) have conventionally been used for heaters in high-pressure studies but they cannot generate temperatures higher than 2900 degrees C and make in situ x-ray observations difficult due to their high x-ray absorption. Using a boron-doped diamond heater overcomes these problems and achieves stable temperature generation for pressure over 10 GPa. The heater starting material is a cold-compressed mixture of graphite with boron used to avoid the manufacturing difficulties due to the extreme hardness of diamond. The diamond heater was synthesized in situ from the boron-graphite mixture at temperature of 1600+/-100 degrees C and pressure of 20 GPa. By using the proposed technique, we have employed the diamond heater for high-temperature generation in a large-volume high-pressure apparatus. Achievement of temperatures above 3000 degrees C allows us to measure the melting points of the important constituents in earth's mantle (MgSiO(3), SiO(2), and Al(2)O(3)) and core (Fe and Ni) at extremely high pressures.
在大型川井型高压装置中，使用金刚石电阻加热器产生了3500摄氏度的温度。在高压研究中，传统上使用铼和铬酸镧作为加热器，但它们无法产生高于2900摄氏度的温度，并且由于其高x射线吸收性，使得原位x射线观测变得困难。使用掺硼金刚石加热器克服了这些问题，并在超过10吉帕的压力下实现了稳定的温度产生。加热器的起始材料是石墨与硼的冷压混合物，用于避免由于金刚石的极高硬度而带来的制造困难。金刚石加热器是在1600±100摄氏度的温度和20吉帕的压力下由硼 - 石墨混合物原位合成的。通过使用所提出的技术，我们已将金刚石加热器用于大型高压装置中的高温产生。实现高于3000摄氏度的温度使我们能够在极高压力下测量地球地幔（（（重要成分（MgSiO₃、SiO₂和Al₂O₃）以及地核（Fe和Ni）的熔点。
