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- W2168642920 abstract "The (Mg <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>4</sub> <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>-x</sub> M <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>x</sub> )(Nb <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2-y</sub> A <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>y</sub> )O <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>9</sub> (M=Mn, Co, and Zn, A=Ta and Sb) compound with corundum structure were prepared and the microwave dielectric properties, crystal structure and covalency of cation-oxygen bonds of the compounds were investigated in this study. The global instability index (GII) of (Mg <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>4-x</sub> M <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>x</sub> )Nb <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sub> O <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>9</sub> compounds was higher than that of Mg <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>4</sub> (Nb <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2-y</sub> A <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>y</sub> )O <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>9</sub> compounds and the GIl values of (Mg <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>4-x</sub> M <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>x</sub> )Nb <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sub> O <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>9</sub> compounds increased with increasing the composition x. From the calculation of cation-oxygen bonds, it was found covalency of M-O bond in the (Mg <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>4-x</sub> M <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>x</sub> )Nb <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sub> O <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>9</sub> compounds decreased, depending on the composition. The dielectric constant of the compounds ranged from 11 to 16 by the M substitutions for Mg, whereas the quality factor (Q f) drastically decreased form 210000 to 5000 GHz. On the other hand, the A substitution for Nb enhanced the increase in the Q f value of the compounds; the highest value was 347000 GHz." @default.
- W2168642920 created "2016-06-24" @default.
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- W2168642920 date "2007-05-01" @default.
- W2168642920 modified "2023-09-23" @default.
- W2168642920 title "Microwave Dielectric Properties of Corundum-Structured (Mg<inf>4-x</inf>M<inf>x</inf>)(Nb<inf>2-y</inf>A<inf>y</inf>)O<inf>9</inf> (M=Mn, Co, and Zn, A=Ta and Sb) Ceramics" @default.
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- W2168642920 doi "https://doi.org/10.1109/isaf.2007.4393316" @default.
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