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@ARTICLE{Otsuka:809769,
author = {Otsuka, Yusuke and Pithan, Christian and Dornseiffer,
Jürgen and Takada, Takahiro and Konoike, Takehiro and
Waser, R.},
title = {{S}ynthesis of nitrogen and lanthanum codoped barium
titanate with a novel thermal ammonolysis reactor},
journal = {Journal of the European Ceramic Society},
volume = {36},
number = {11},
issn = {0955-2219},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2016-02696},
pages = {2719 - 2725},
year = {2016},
abstract = {Lanthanum doped barium titanate was nitridated by thermal
ammonolysis with a newly designed reactor, which performs
extended efficiency to supply ammonia with less
decomposition at elevated temperatures above 600 °C. The
kinetics of nitrogen-uptake was studied systematically at
elevated temperatures. Nitrogen-content, thermal stability
and crystallographic phase of nitridated lanthanum doped
barium titanate were characterized by several techniques.
The final nitrogen-content of nitridated lanthanum doped
barium titanate was much higher than the content of
lanthanum, resulting in the formation of oxygen vacancies
compensating the additional negative electrical charge of
nitrogen anions occupying regular oxygen sites in the
lattice. Through thermal ammonolysis, strongly reducing
conditions because of the decomposition of ammonia
generating hydrogen gas causes the formation of barium
orthotitanate as a secondary phase. Ammonolysis temperature
below 800 °C and suppression of thermal decomposition of
ammonia gas are essential to realize a nitridated lanthanum
doped barium titanate as a single phase.},
cin = {PGI-7 / IEK-1},
ddc = {660},
cid = {I:(DE-Juel1)PGI-7-20110106 / I:(DE-Juel1)IEK-1-20101013},
pnm = {524 - Controlling Collective States (POF3-524)},
pid = {G:(DE-HGF)POF3-524},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000376808100009},
doi = {10.1016/j.jeurceramsoc.2016.03.033},
url = {https://juser.fz-juelich.de/record/809769},
}