单词 | ferrospinel |
释义 | > as lemmasferrospinel ferrospinel n. Brit. /ˌfɛrə(ʊ)spᵻˈnɛl/ , /ˈfɛrə(ʊ)spᵻˌnɛl/ , U.S. /ˌfɛroʊspəˈnɛl/ , /ˈfɛroʊspəˌnɛl/ Materials Science a ferromagnetic substance having a spinel structure (cf. ferrite n. 1); (also) an iron-containing spinel, whether ferromagnetic or not.ΘΚΠ the world > matter > physics > solid state physics > semiconductivity > [noun] > crystalline piece crystal1907 ferrospinel1950 the world > matter > physics > electromagnetic radiation > magnetism > types of magnetism > [noun] > ferromagnetism > body or substance ferromagnetic1850 ferromagnet1887 ferrospinel1950 1950 R. L. Harvey et al. in RCA Rev. Sept. 321 Ferrospinels are unique crystalline materials of spinel structure which are formed at high temperatures by solid-phase reaction of iron oxide and one or more of certain other metal oxides. [Note] The coined word ferrospinel is used to denote a ferromagnetic spinel... Ferrospinels are sometimes called ‘ferrites’. 1971 Jrnl. Physics & Chem. Solids 32 1465/1 In ferro-spinels, the itinerant electrons associated with the Fe2+ ions play a major part in determining the electronic properties. 1986 W. B. Hubbard & R. A. Masteler tr. V. N. Zharkov Interior Struct. Earth & Planets vi. 120 Depending on the dominant cation B, we differentiate between: the alumospinels, or the spinel group; the ferrospinels, or the magnetite group; the chromospinels, or the chromite group; and the titano- and vanadiospinels. 2011 Materials Sci. & Engin. B. 176 103 The cobalt ferrospinel was found to have better catalytic activity as compared to the Cr-substituted ferrospinels and the pure oxides. < as lemmas |
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