Melting of Boron-Rich Chalcogenides B12S and B12Se under Pressure

IF 1.2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Superhard Materials Pub Date : 2025-09-04 DOI:10.3103/S1063457625040100

V. L. Solozhenko

引用次数: 0

Abstract

Melting of boron-rich chalcogenides, rhombohedral B₁₂S and B₁₂Se, has been studied at pressures up to 8 GPa using in situ electrical resistivity measurements. It was found that above 2.5 GPa both chalcogenides melt congruently. The melting curve of B₁₂Se has a negative slope of ‒30(3) K/GPa, indicating a higher density of the melt compared to the solid phase, while a very unusual zero slope of –1(2) K/GPa is observed for B₁₂S. The melting points at ambient pressure were estimated to be 2270(7) K for B₁₂S and 2250(16) K for B₁₂Se.

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富硼硫族化合物B12S和B12Se在压力下的熔融

利用原位电阻率测量，在高达8gpa的压力下研究了富硼硫族化合物（菱形体B12S和B12Se）的熔化。结果表明，在2.5 GPa以上，两个硫族化合物完全熔化。B12Se的熔融曲线斜率为负30(3)K/GPa，表明熔体密度高于固相，而B12S的熔融曲线斜率为-1 (2)K/GPa。在环境压力下B12S的熔点估计为2270(7)K， B12Se的熔点估计为2250(16)K。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Superhard Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

1.80

自引率

66.70%

发文量

审稿时长

2 months

期刊介绍： Journal of Superhard Materials presents up-to-date results of basic and applied research on production, properties, and applications of superhard materials and related tools. It publishes the results of fundamental research on physicochemical processes of forming and growth of single-crystal, polycrystalline, and dispersed materials, diamond and diamond-like films; developments of methods for spontaneous and controlled synthesis of superhard materials and methods for static, explosive and epitaxial synthesis. The focus of the journal is large single crystals of synthetic diamonds; elite grinding powders and micron powders of synthetic diamonds and cubic boron nitride; polycrystalline and composite superhard materials based on diamond and cubic boron nitride; diamond and carbide tools for highly efficient metal-working, boring, stone-working, coal mining and geological exploration; articles of ceramic; polishing pastes for high-precision optics; precision lathes for diamond turning; technologies of precise machining of metals, glass, and ceramics. The journal covers all fundamental and technological aspects of synthesis, characterization, properties, devices and applications of these materials. The journal welcomes manuscripts from all countries in the English language.