Electrical properties of ZrO₂ in nano- and polycrystalline states at high pressure
We present the results of the research work devoted to the problem: how the crystallites influence the electrical properties of stabilized zirconia at pressures of 22−50 GPa and in the temperature range of 77−450 K. The measurements were conducted in the highpressure chamber under direct current on...
Збережено в:
| Дата: | 2007 |
|---|---|
| Автори: | , , , , , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Донецький фізико-технічний інститут ім. О.О. Галкіна НАН України
2007
|
| Назва видання: | Физика и техника высоких давлений |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/70292 |
| Теги: |
Додати тег
Немає тегів, Будьте першим, хто поставить тег для цього запису!
|
| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Electrical properties of ZrO₂ in nano- and polycrystalline states at high pressure / I.V. Korionov, A.N. Trefilova, A.N. Babushkin, I.G. Korionova, U.N. Shumina, W. Lojkowski, A. Opalinska // Физика и техника высоких давлений. — 2007. — Т. 17, № 1. — С. 70-73. — Бібліогр.: 3 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
irk-123456789-70292 |
|---|---|
| record_format |
dspace |
| spelling |
irk-123456789-702922014-11-03T03:01:46Z Electrical properties of ZrO₂ in nano- and polycrystalline states at high pressure Korionov, I.V. Trefilova, A.N. Babushkin, A.N. Korionova, I.G. Shumina, U.N. Lojkowski, W. Opalinska, A. We present the results of the research work devoted to the problem: how the crystallites influence the electrical properties of stabilized zirconia at pressures of 22−50 GPa and in the temperature range of 77−450 K. The measurements were conducted in the highpressure chamber under direct current on nanocrystalline powders of ZrO₂ stabilized by Pr (0.5%) and on compact powder samples of «partially stabilized» ZrO₂ including 5% Y₃P₃. The nanocrystallite size equals 10, 12 and 56 nm. The change of electronic properties of stabilized zirconia at 31.5–37.5 GPa, 40–44 GPa and 45.5–48.5 GPa in nano- and polycrystalline states has been discovered. It gives us a possibility to verify the phase diagram of ZrO₂ at those intervals of pressure. Besides, it has been revealed that stabilization as nanocrystallinity leads to appearance of additional mechanisms of conductivity in ZrO₂. 2007 Article Electrical properties of ZrO₂ in nano- and polycrystalline states at high pressure / I.V. Korionov, A.N. Trefilova, A.N. Babushkin, I.G. Korionova, U.N. Shumina, W. Lojkowski, A. Opalinska // Физика и техника высоких давлений. — 2007. — Т. 17, № 1. — С. 70-73. — Бібліогр.: 3 назв. — англ. 0868-5924 PACS: 71.30.+h, 72.20.−i, 73.63.Bd http://dspace.nbuv.gov.ua/handle/123456789/70292 en Физика и техника высоких давлений Донецький фізико-технічний інститут ім. О.О. Галкіна НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| description |
We present the results of the research work devoted to the problem: how the crystallites influence the electrical properties of stabilized zirconia at pressures of 22−50 GPa and in the temperature range of 77−450 K. The measurements were conducted in the highpressure chamber under direct current on nanocrystalline powders of ZrO₂ stabilized by Pr (0.5%) and on compact powder samples of «partially stabilized» ZrO₂ including 5% Y₃P₃. The nanocrystallite size equals 10, 12 and 56 nm. The change of electronic properties of stabilized zirconia at 31.5–37.5 GPa, 40–44 GPa and 45.5–48.5 GPa in nano- and polycrystalline states has been discovered. It gives us a possibility to verify the phase diagram of ZrO₂ at those intervals of pressure. Besides, it has been revealed that stabilization as nanocrystallinity leads to appearance of additional mechanisms of conductivity in ZrO₂. |
| format |
Article |
| author |
Korionov, I.V. Trefilova, A.N. Babushkin, A.N. Korionova, I.G. Shumina, U.N. Lojkowski, W. Opalinska, A. |
| spellingShingle |
Korionov, I.V. Trefilova, A.N. Babushkin, A.N. Korionova, I.G. Shumina, U.N. Lojkowski, W. Opalinska, A. Electrical properties of ZrO₂ in nano- and polycrystalline states at high pressure Физика и техника высоких давлений |
| author_facet |
Korionov, I.V. Trefilova, A.N. Babushkin, A.N. Korionova, I.G. Shumina, U.N. Lojkowski, W. Opalinska, A. |
| author_sort |
Korionov, I.V. |
| title |
Electrical properties of ZrO₂ in nano- and polycrystalline states at high pressure |
| title_short |
Electrical properties of ZrO₂ in nano- and polycrystalline states at high pressure |
| title_full |
Electrical properties of ZrO₂ in nano- and polycrystalline states at high pressure |
| title_fullStr |
Electrical properties of ZrO₂ in nano- and polycrystalline states at high pressure |
| title_full_unstemmed |
Electrical properties of ZrO₂ in nano- and polycrystalline states at high pressure |
| title_sort |
electrical properties of zro₂ in nano- and polycrystalline states at high pressure |
| publisher |
Донецький фізико-технічний інститут ім. О.О. Галкіна НАН України |
| publishDate |
2007 |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/70292 |
| citation_txt |
Electrical properties of ZrO₂ in nano- and polycrystalline states at high pressure / I.V. Korionov, A.N. Trefilova, A.N. Babushkin, I.G. Korionova, U.N. Shumina, W. Lojkowski, A. Opalinska // Физика и техника высоких давлений. — 2007. — Т. 17, № 1. — С. 70-73. — Бібліогр.: 3 назв. — англ. |
| series |
Физика и техника высоких давлений |
| work_keys_str_mv |
AT korionoviv electricalpropertiesofzro2innanoandpolycrystallinestatesathighpressure AT trefilovaan electricalpropertiesofzro2innanoandpolycrystallinestatesathighpressure AT babushkinan electricalpropertiesofzro2innanoandpolycrystallinestatesathighpressure AT korionovaig electricalpropertiesofzro2innanoandpolycrystallinestatesathighpressure AT shuminaun electricalpropertiesofzro2innanoandpolycrystallinestatesathighpressure AT lojkowskiw electricalpropertiesofzro2innanoandpolycrystallinestatesathighpressure AT opalinskaa electricalpropertiesofzro2innanoandpolycrystallinestatesathighpressure |
| first_indexed |
2025-07-05T19:34:58Z |
| last_indexed |
2025-07-05T19:34:58Z |
| _version_ |
1836836820200980480 |
| fulltext |
Физика и техника высоких давлений 2007, том 17, № 1
70
PACS: 71.30.+h, 72.20.−i, 73.63.Bd
I.V. Korionov1, A.N. Trefilova1, A.N. Babushkin1, I.G. Korionova1,
U.N. Shumina1, W. Lojkowski2, A. Opalinska2
ELECTRICAL PROPERTIES OF ZrO2 IN NANO- AND
POLYCRYSTALLINE STATES AT HIGH PRESSURE
1Ural State University
Lenina str. 51, Ekaterinburg, Russia
2High Pressure Research Center, Polish Academy of Sciences
ul. Sokolowska 29/37, 01-142 Warsaw, Poland
E-mail: korionov-2002@yandex.ru
We present the results of the research work devoted to the problem: how the crystallites
influence the electrical properties of stabilized zirconia at pressures of 22−50 GPa and in
the temperature range of 77−450 K. The measurements were conducted in the high-
pressure chamber under direct current on nanocrystalline powders of ZrO2 stabilized by
Pr (0.5%) and on compact powder samples of «partially stabilized» ZrO2 including 5%
Y3P3. The nanocrystallite size equals 10, 12 and 56 nm. The change of electronic proper-
ties of stabilized zirconia at 31.5–37.5 GPa, 40–44 GPa and 45.5–48.5 GPa in nano- and
polycrystalline states has been discovered. It gives us a possibility to verify the phase dia-
gram of ZrO2 at those intervals of pressure. Besides, it has been revealed that stabilization as
nanocrystallinity leads to appearance of additional mechanisms of conductivity in ZrO2.
Introduction
Effects of size in ultradisperse systems attract attention because they lead to new
properties that are unordinary for homogeneous macroscopic bodies and so are very
important for practice. The results of researching the electrical resistance of stabilized
zirconia in nano- and polycrystalline states under pressures of 22–50 GPa and in the
temperature range of 77–450 K are presented in the article. The aim of the research
work is determination of correlation between electrical properties of ZrO2, stabilization
and sizes of its crystallites in nano- and polycrystalline states under high pressures.
Experiment
The measurements of the resistance under direct current were conducted in a
high-pressure chamber (HPC) with anvils «rounded cone-plane» that were made
from synthetic carbonado-type diamonds. The anvils resistance under direct cur-
rent is not higher than 10 Ω and has insignificant temperature dependence.
Физика и техника высоких давлений 2007, том 17, № 1
71
The error of resistance valuation doesn’t exceed 10% under pressures of
15–50 GPa. The investigated samples are about 0.2 mm in diameter and 5–30 µm
thick [1].
Measurements were made on a polycrystalline powder sample of not stabilized
ZrO2, polycrystalline samples of zirconium partially stabilized by yttrium (ZrO2 +
3 mol% Y2O3) and nanocrystalline ZrO2 samples partially stabilized by praseo-
dymium. The nanocrystalline samples stabilized by praseodymium had the crys-
tallite size of 10, 12 and 54 nm.
For each sample, two series of measurements were carried out.
The bulk sample of ZrO2 + Y2O3 was synthesized by the Daiichi Daiichi Ki-
gensou Company in Japan (Lot # NEY-5M LO524) and in the Institute of General
and Inorganic Chemistry, NAS of Belarus [2]. Nanocrystalline praseodymium-
doped zirconia powders were produced using a microwave driven hydrothermal
process under pressures up to 8 GPa. Nanopowders of ZrO2 with Pr in solid solu-
tions had Pr content of 0.5 mol%. These samples were synthesized at High Pres-
sure Research Center, Polish Academy of Sciences. Polycrystalline powders of
not stabilized ZrO2 were synthesized by DonPTI.
Experimental results and discussion
During the experiment it has been discovered that resistance of all samples
is falling by 3–4 orders of magnitude under the rising of pressure from 31.5 to
37.5 GPa.
The temperature dependences of resistance of the samples stabilized by pra-
seodymium and yttrium have activation character and are described by ordinary
activation relationship
0 exp aER R E
kT
=
, (1)
where R0 – parameter characterized by mobility and concentration of charge car-
ries; Ea – activation energy; k – Boltzman constant; T – temperature.
The temperature dependences of re-
sistance for the sample partially stabilized
by yttrium had metal-like character to
pressure of 45 GPa. Under higher pres-
sure the temperature dependences of re-
sistance had activation character.
We have investigated the influence of
crystallite sizes on value of activation energy
Ea for nanocrystalline samples [2]. Under
pressure of 45 GPa the value of activation
energy for 10 and 12 nm was about 0.1 eV,
whereas for, 54 nm and for polycrystalline
samples – about 10−3 eV (Fig. 1).
Fig. 1. Dependence of activation energy
Ea on the crystallite size d for T ≈ 300 K
Физика и техника высоких давлений 2007, том 17, № 1
72
а b
c
Due to our research it is proved that the value of activation energy depends on
crystallite sizes in nanocrystalline state and it rises under reduction of the latter [3].
From Fig. 2,a it is clear that for the nonstabilized sample there is only one
mechanism of conductivity. Stabilization of zirconia leads to appearance of the
second mechanism of conductivity (Fig. 2,b) developing as changes of the resis-
tance vs temperature curve slope in stabilized ZrO2. Nanocrystallinity (for 10 nm
size) as a stabilization leads to appearance of the activation process that indicates
a significant contribution of surface effects to electrical properties of nanoceram-
ics (Fig. 2,c).
Fig. 3. Fragments of
the phase diagram
with marked fields of
phase transitions: a −
precised by us, b −
from Ref. [3]
Fig. 2. Temperature dependences of re-
sistance: a − for nonstabilized ZrO2 sam-
ple; b − for sample with crystallites size
of 54 nm; c − for sample with crystallites
size of 12 nm
Физика и техника высоких давлений 2007, том 17, № 1
73
From the graph of the temperature dependences of resistance it is seen that un-
der pressure of 35 GPa there is the change of the electrical structure. It develops
as the changing of signs of the coefficient of line’s slope on the logarithm graph
of temperature dependences of resistance.
The existence of activation-energy maximum and the change of thermal coeffi-
cients of resistance at 31, 35 and 45 GPa prove the existence of structural phase
transitions under such pressures in correlation with obtained results (Fig. 3,b) [3].
These effects give us a possibility to verify phase diagram of zirconia in this in-
terval of pressures.
The research was made possible in part by grants RBRF No.01-03-96494 and
CRDF No. REC-005.
1. A.N. Babushkin, Y.A. Kandrina, O.L. Kobeleva, S.N. Schkerin, Y.Y. Volkova, Kluwer
Acad. Publ., Dordrecht−New York−London (2001), p. 131.
2. T.M. Ulyanova, L.V. Krut’ko, E.S. Titova, S.V. Paemurd, C.V. Medichenko, O.Yu. Kal-
mychkova, High-pressure Physics and Technology 14, № 4, 62 (2004).
3. A.N. Trefilova, I.V. Korionov, A.N. Babushkin, W. Lojkowski, A. Opalinska, Mater.
Sci. 23, № 1 (2005).
|