Jump to main content
Jump to site search

Issue 44, 2018
Previous Article Next Article

Influence of (Al1/3W2/3)5+ co-substitution for Nb5+ in NdNbO4 and the impact on the crystal structure and microwave dielectric properties

Author affiliations

Abstract

NdNb1−x(Al1/3W2/3)xO4 (x = 0.03–0.07) solid solution compounds were synthesized and characterized via solid-state reaction. XRD patterns reveal the formation of a single fergusonite phase, and the dependence of microwave dielectric properties on its structural characteristic was investigated based on Rietveld refinements together with complex chemical bond theory. The variation of dielectric constant is attributed to the Nb/Al1/3W2/3–O bond ionicity. The grain size and total lattice energy are both associated with quality factor, and the temperature coefficient is affected by oxygen and bond valence of the Nb site. Infrared reflectivity spectrum analysis illustrated that the permittivity is primarily due to ion polarization in the microwave frequency region. Notably, the following properties of NdNb1−x(Al1/3W2/3)xO4 (x = 0.04) ceramics were obtained: εr ∼ 19.04, Q × f ∼ 58 219 GHz and τf ∼ −41.14 ppm/°C.

Graphical abstract: Influence of (Al1/3W2/3)5+ co-substitution for Nb5+ in NdNbO4 and the impact on the crystal structure and microwave dielectric properties

Back to tab navigation

Publication details

The article was received on 01 Aug 2018, accepted on 10 Oct 2018 and first published on 15 Oct 2018


Article type: Paper
DOI: 10.1039/C8DT03134G
Citation: Dalton Trans., 2018,47, 15808-15815
  •   Request permissions

    Influence of (Al1/3W2/3)5+ co-substitution for Nb5+ in NdNbO4 and the impact on the crystal structure and microwave dielectric properties

    H. Yang, S. Zhang, H. Yang, Y. Yuan and E. Li, Dalton Trans., 2018, 47, 15808
    DOI: 10.1039/C8DT03134G

Search articles by author

Spotlight

Advertisements