CLAM
发表于 2025-3-25 06:59:32
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不适当
发表于 2025-3-25 09:29:16
Chemical Properties of BoronIt is impossible to describe in detail the chemical properties of elementary boron in a few pages. The object of this article is to give general information. A more complete study of the reactions of boron with the other elements of the periodic table is presented in Chapters C VI-XIII of this volume.
Epidural-Space
发表于 2025-3-25 11:53:32
Methods of Preparation of Amorphous BoronPreparation of pure elemental boron presents certain difficulties. The conditions necessary for its preparation must be carefully main tained because boron reacts strongly with many substances at high temperatures required for reduction of its compounds. Any by-products formed during the reduction are difficult to separate.
Deject
发表于 2025-3-25 18:36:54
Characterization of Localized States in β-Rhombohedral BoronBoron is an elemental semiconductor with very fascinating properties, namely low density, high melting point (2300°C), a hardness close to that of diamond and remarkable mechanical and nuclear properties.
CRATE
发表于 2025-3-25 22:08:20
Borides of the IVb GroupThe first attempts to prepare compounds of boron with carbon were described by Muhlhauser (1894), Moissan (1899) and Podszus (1933). The products obtained were attributed to compositions of BC, B.C., B.C, B.C and B.C. The results were based on bulk chemical analysis only.
Conduit
发表于 2025-3-26 04:05:39
Borides of Group VIb ElementsReference is made in the literature to the following boron oxides: B.O, B.O., B.O, B.O, B.O, B.O., B.O, B.O., (BO)., B.O., B.O. and BO. Among these compounds only B.O. has been investigated in detail, while no data are available in the recent literature on the existence of B.O, B.O, B.O., B.O., and B.O..
Extricate
发表于 2025-3-26 08:23:39
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健谈
发表于 2025-3-26 12:24:57
https://doi.org/10.1007/978-3-7908-1938-0 various compounds clears the way for further progress not only in theory but also in material manufacture. It is thus natural that simultaneously with the investigation of physico-chemical properties of borides, scientists should also investigate their electronic structure models.
POLYP
发表于 2025-3-26 12:42:05
https://doi.org/10.1007/978-3-658-42837-2ization of the stability of these materials as well as the metal-deficient and mixed-metal phases. Band structure and density-of-states calculations lead to values of electrical conductivities and Hall coefficients for these materials which agree well with experimental data.
vascular
发表于 2025-3-26 18:07:43
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