MARS
发表于 2025-3-30 12:06:43
Various Preparations of Elemental Boron,rown on a tantalum wire at 1500°C. Boron diffusion into the wire at this temperature was serious. B.C crystals up to 1 mm in diameter were grown on a graphite disk heated to 2000°C. Infrared transmission, resistivity, and hardness tests were made on the samples.
显示
发表于 2025-3-30 13:16:52
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填料
发表于 2025-3-30 18:30:25
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DEFT
发表于 2025-3-30 23:01:41
Crystallography of the Aluminum Borides,m those of boron and also the only phase whose structure is known. (3), (4), and (5) have common unit cell vectors which show that, as in boron carbide and the known forms of boron, boron icosahedra represent the major structural elements.
颂扬国家
发表于 2025-3-31 01:22:16
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