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Preparation of Ba 6−3 x Nd 8+2 x Ti 18 O 54 via Ethylenediaminetetraacetic Acid Precursor
Author(s) -
Xu Yebin,
Chen Xiang Ming,
Wu Yong Jun
Publication year - 2000
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2000.tb01657.x
Subject(s) - ethylenediaminetetraacetic acid , chelation , materials science , nuclear chemistry , crystallization , metal , molar ratio , ceramic , chemistry , metallurgy , catalysis , organic chemistry
Ba 6−3 x Nd 8+2 x Ti 18 O 54 ceramic powders were synthesized by the modified Pechini method using ethylenediaminetetraacetic acid (EDTA) as a chelating agent. A purplish red, molecular‐level, homogeneously mixed gel was prepared, and transferred into a porous resin intermediate through charring. Single‐phase and well‐crystallized Ba 6−3 x Nd 8+2 x Ti 18 O 54 powders were obtained from pulverized resin at a temperature of 900°C for 3 h, without formation of any intermediate phases. Meanwhile, the molar ratio of EDTA to total metal cation concentration had a significant influence on the crystallization behavior of Ba 6−3 x Nd 8+2 x Ti 18 O 54 . The Ba 6−3 x Nd 8+2 x Ti 18 O 54 ( x = 2/3) ceramics prepared via EDTA precursor have excellent microwave dielectric characteristics: ɛ= 87, Qf = 8710 GHz.