TY  - JOUR
T1  - Study of Factors Affecting the Dielectric Strength of
[EP/Z<sub>r</sub> O<sub>2</sub> -y<sub>2</sub> O<sub>3</sub> ] Nanocomposites
AU - Alfalahi, Ahmad H.M. 
JO  - Journal of Engineering and Applied Sciences
VL  - 13
IS  - 2
SP  - 484
EP  - 488
PY  - 2018
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2018.484.488
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2018.484.488
KW  - Epoxy resin
KW  -Zircon-Yttria
KW  -nanocomposite
KW  -dielectric strength
KW  -breakdown voltage
KW  -water
AB  - A nanocomposite material was prepared from epoxy resin reinforced by nanoceramic powder [Nano
Zirconia-Yttria (Z<sub>r</sub> O<sub>2</sub> -y<sub>2</sub> O<sub>3</sub>) (70-80 nm)] with several weight ratios (1.5, 2.5, 3.5, 4.5 wt.%), the research samples 
were prepared according to the standard specifications in different thicknesses (1, 1.5, 2, 2.5 mm). The effect
of addition rate (wt.%) was studied as well as the thickness, number of cycles and average of voltage increase,
on the dielectric strength (E<sub>br</sub>) for the composites before immersion, then, the effects of immersing the composite br
material in distilled water as well as in NaOH and HCL diluted solutions (0.5 N) were observed. The test results
revealed an increase in (E<sub>br</sub>) with increasing the addition of Z<sub>r</sub> O<sub>2</sub> -y<sub>2</sub> O<sub>3</sub>) [(from 27.8 kV/mm for a ratio of 1.5 wt.% br 
to 33.4 kV/mm for a ratio of 4.5 wt.% at the average of voltage increase 0.5 kV/sec) (and from 31.4 kV/mm for a
ratio of 1.5 wt.% to 36.7 kV/mm for a ratio of 4.5 wt.% at the average of voltage increase of 5 kV/sec)] and with
increasing average voltage increase on the contrary (E<sub>br</sub>) decreases with increasing the sample thickness, br
number of cycles and immersion in distilled water and chemical solutions (with immersion period) noticing that
the chemical solutions effect was greater than that of the distilled water.
ER  -