In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 38, No. 9S ( 1999-09-01), p. 5625-
Abstract:
We have investigated the formation and the microwave dielectric properties of the
Ba 4 (Nd 28/3- y R y )Ti 18 O 54 ( R = Eu, Dy, Ho, Er and Yb) solid solutions in which R ions are substituted for Nd ions in Ba 6-3 x Nd 8+2 x Ti 18 O 54 solid solutions with x =2/3.
Based on the change of the volume of the unit cell, it was inferred that Eu, Dy, Ho and Er ions substituted into rhombic A 1-sites, but Yb ions did smaller sites such as B -sites and C -sites after substituting A 1-sites.
The quality factor ( Q · f ) improved as the ionic radius of substituted R ions increased. In the Eu series, the best Q · f value of 10405 GHz was obtained.
The temperature coefficients of the reasonant frequency (τ f ) in the Dy, Ho and Er series were improved by more than 50%, but the dielectric constant ( ε r ) showed only a nominal change of about 3–4 in the vicinity of 80.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.38.5625
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
1999
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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