Conclusions
The dielectric properties of silicon nitride are strongly affected by the presence of impurities, in particular oxygen. The dielectric permittivity of silicon nitride, calculated from data yielded by measurements at a frequency of 9.5 GHz, is 6.3–7.1, and the tangent of its dielectric loss angle, (5.3–9.7) · 10−3.
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Translated from Poroshkovaya Metallurgiya, No. 9(213), pp. 62–70, September, 1980.
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Petrovskii, V.Y., Gnesin, G.G., Kirilenko, V.M. et al. Dielectric characteristics of silicon nitride powders in the SHF range. Powder Metall Met Ceram 19, 632–639 (1980). https://doi.org/10.1007/BF00790556
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DOI: https://doi.org/10.1007/BF00790556