Controllable τf value of barium silicate microwave dielectric ceramics with different Ba/Si ratios

Ba1+1/M[Si2O5+1/M] low‐permittivity microwave dielectric ceramics are prepared using the conventional solid‐state method. Pure phases are obtained in barium silicates with M = 1, 3, 4, 5, and ∞, except for M = 7, in which two phases, Ba5Si8O21 and BaSi2O5, are observed. As the complexity of the crys...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the American Ceramic Society 2018-01, Vol.101 (1), p.25-30
Main Authors: Lei, Wen, Zou, Zheng‐Yu, Chen, Ze‐Hao, Ullah, Burhan, Zeb, Aurang, Lan, Xue‐Kai, Lu, Wen‐Zhong, Fan, Gui‐Fen, Wang, Xiao‐Hong, Wang, Xiao‐Chuan
Format: Article
Language:English
Subjects:
dielectric properties
electroceramics
silicates
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Ba1+1/M[Si2O5+1/M] low‐permittivity microwave dielectric ceramics are prepared using the conventional solid‐state method. Pure phases are obtained in barium silicates with M = 1, 3, 4, 5, and ∞, except for M = 7, in which two phases, Ba5Si8O21 and BaSi2O5, are observed. As the complexity of the crystal structure described by the Shannon information per reduced unit cell increases, the τf value tends to change from a negative to a positive value, except for M = 5, which has the highest complexity. A single Ba5Si8O21 phase with εr anomaly peak at −180°C exhibits a rare positive τf value (+25 ppm/°C), which is a novel temperature compensator.
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.15205