Boron-doped diamond as a new heating element for internal-resistive heated diamond-anvil cell

Haruka Ozawa, Shigehiko Tateno, Longjian Xie, Yoichi Nakajima, Naoya Sakamoto, Saori I. Kawaguchi, Akira Yoneda, Naohisa Hirao

    Research output: Contribution to journalArticlepeer-review

    6 Citations (Scopus)

    Abstract

    We have developed an internal-resistive heated diamond-anvil cell (IHDAC) with a new resistance heater–boron-doped diamond (BDD)–along with an optimized design of the cell assembly, including a composite gasket. Our proposed technique is capable of heating a silicate/oxide material with (1) long-term stability (>1 h at 2500 K) and (2) uniform radial temperature distribution (±35 K at 2500 K across a 40-µm area), which are clear advantages over the conventional laser-heated and internal-heated DACs. In addition, the achieved temperature in this study was greater than 3500 K, which mostly covers the possible geotherm of the entire lower mantle. In situ X-ray diffraction (XRD) measurement and ex situ chemical analyses confirmed that weak XRD intensity from the BDD heater and chemical inertness (no boron diffusion into silicate samples). This newly developed IHDAC with a BDD heater can be used to determine the phase diagrams of mantle materials with high precision and be used in lower-mantle petrology.

    Original languageEnglish
    Pages (from-to)120-135
    Number of pages16
    JournalHigh Pressure Research
    Volume38
    Issue number2
    DOIs
    Publication statusPublished - Apr 3 2018

    Keywords

    • Internal-resistive heated diamond-anvil cell
    • boron-doped diamond
    • lower mantle

    ASJC Scopus subject areas

    • Condensed Matter Physics

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