Dielectric Properties and Method of Characterizing Ceramic Powders and Multiphase Composites


Partial XRD pattern of BT – before and after NMP treatment



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Dielectric Properties and Method of Characterizing Ceramic Powder (1)


Partial XRD pattern of BT – before and after NMP treatment 
(NMP treatment showing the peak split at 45ºC)..........................
46 
15.
DSC curve showing the tetragonal-to-cubic transition in the
NMP treated barium titanate powder during the process 
of increasing the temperature .......................................................
48 
16.
FTIR spectra of BT- before and after NMP treatment
showing the OH vibration at 2600 – 3600 cm
-1
...........................
49 
17. 
(a)FTIR spectra of calcined BT aged in acidic water..............................
51 
(b)FTIR spectra of calcined BT aged in basic water...............................
52 
18. 
(a)TGA curves for BT aged in acidic water ............................................
54 
(b)TGA curves for BT aged in basic water .............................................
54 
19.
Dielectric constant values for NMP treated BT
vs. ceramic volume % ...................................................................
56 
20.
(a)Dielectric constant values of BT aged in acidic water
as a function of calcining temperature ..........................................
57 
(b)Dielectric constant values of BT aged in basic water 
as a function of calcining tempetrature .........................................
58 
21.
(a)Dielectric properties of BT aged in acidic water
with increasing OH content...........................................................
59 
(b)Dielectric properties of BT aged in basic water 
with increasing OH content...........................................................
60 


xii 
PREFACE 
Our goal of this project was to characterize ceramic powders and composites 
which are used as embedded capacitors. This work was systematically divided into three 
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