In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 33, No. 9S ( 1994-09-01), p. 5466-
Abstract:
The microwave dielectric characteristics of ilmenite titanates, M 2+ TiO 3 (where M 2+ =Ni, Mg and Mn) and ( Mg 0.95 M 0.05 2+ )TiO 3 (where M 2+ = Ni, Mg, Co and Mn) series, have been investigated as a function of ionic radius of M 2+ and (Mg 0.95 M 0.05 2+ ) 2+ ions, respectively. The ilmenite titanates have high Q value and low dielectric constant due to the isolation of TiO 6 octahedra by the M O 6 octahedron layer and cation vacancy layer in comparison with the perovskite titanates. The existence of localized 3 d electrons in Ni 2+ (3 d 8 ) and Mn 2+ (3 d 5 ) is concerned with the microwave dielectric properties of the M 2+ TiO 3 series. The dielectric constant ε r at 10 GHz of the (Mg 0.95 M 0.05 2+ )TiO 3 series shows the minimum value around the average ionic radius of 0.721 Å, while the Q value shows a maximum, probably due to a local lattice distortion. The (Mg 0.95 Co 0.05 )TiO 3 compound shows a maximum Q value of 23,000 at 10 GHz, dielectric constant of 16.8, and τ f of -54 ppm/K.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.33.5466
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
1994
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
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