In:
Journal of the American Ceramic Society, Wiley, Vol. 106, No. 5 ( 2023-05), p. 3252-3260
Abstract:
In this study, Y 3− x La x Al 5 O 12 (0 ≤ x ≤ 0.09) ceramics were synthesized, and the phase composition, lattice evolution, and microwave dielectric properties were investigated in detail. Scanning electron microscopy confirms that the addition of moderate amounts of La 2 O 3 improves the grain development of YAG ceramics, but excessive doping destabilizes the crystal structure. Transmission electron microscopy characterization shows that the variation of the dielectric properties of the samples with x ‐value is related to the occurrence of benign dislocation structures caused by modifications in the type and content of the A‐site rare‐earth ions. The variations in relative density, dielectric constant, and quality factor remain basically coordinated. The optimum microwave dielectric properties of La 3+ doped YAG samples are exhibited as ε r = 10.61, Q × f = 187, 542 GHz, τ f = −31.2 ppm/°C when La 2 O 3 is doped at x = 0.015.
Type of Medium:
Online Resource
ISSN:
0002-7820
,
1551-2916
Language:
English
Publisher:
Wiley
Publication Date:
2023
detail.hit.zdb_id:
2008170-4
detail.hit.zdb_id:
219232-9
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