Sol–gel synthesis, densification, and electrical properties of CuO–B2O3 doped Ba6−3x R8+2x Ti18O54 (R = Nd) microwave dielectric ceramics

The low-temperature confirmable Ba6−3xR8+2xTi18O54 (BNT, R = Nd, x = 2/3) ceramics were prepared by means of a citrate sol–gel soft-chemical method and the addition of sintering aid. Nano-sized BNT crystallite powders (~80 nm) were successfully synthesized as indicated by transmission electron micro...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials science 2011-03, Vol.46 (6), p.1932-1936
Main Authors: Wu, Yang, Zuo, Ruzhong, Zhou, Yuanyuan, Yue, Zhenxing
Format: Article
Language:English
Subjects:
Boron oxides
Ceramics
Crystallites
Densification
Dielectric properties
Electrical properties
Materials science
Organic chemistry
Powder compacts
Q factors
Sintering
Sintering (powder metallurgy)
Sol-gel processes
Transmission electron microscopy
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:The low-temperature confirmable Ba6−3xR8+2xTi18O54 (BNT, R = Nd, x = 2/3) ceramics were prepared by means of a citrate sol–gel soft-chemical method and the addition of sintering aid. Nano-sized BNT crystallite powders (~80 nm) were successfully synthesized as indicated by transmission electron microscopy and X-ray diffractometry. The powder compacts exhibit enhanced sintering activity and can be well densified at 925 °C with the aid of a small amount of CuO and B2O3. Compared to pure BNT ceramics prepared by a solid-state reaction method, not only was the sintering temperature significantly decreased, but also the good microwave dielectric properties of dielectric constant εr = 63 and quality factor Q × f = 5200 GHz were maintained. Moreover, the relationship between the microstructure, densification, and electrical properties was discussed.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-010-5028-9