Design of p‐type NKN‐based piezoelectric ceramics sintered in low oxygen partial pressure by defect engineering

Abstract The intrinsic conduction mechanism and optimal sintering atmosphere of (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 (BCZT) ceramics was regulated by doping Mn element in this work. By Hall and impedance analysis, the undoped BCZT ceramics exhibit a typical n–type conduction mechanism, and the electron concentration decreases with the increasing oxygen partial pressure. Therefore, the undoped ceramics exhibit best electrical properties (d33 = 585 pC/N, kp = 56%) in O2. A handful of Mn doping element would transfer the conduction mechanism from n-type into p–type. And the hole concentration reduces with the decreasing oxygen partial pressure for Mn-doped BCZT ceramics. Therefore, the Mn-doped ceramics sintered in N2 have the highest insulation resistance and best piezoelectric properties (d33 = 505 pC/N, kp = 50%). The experimental results demonstrate that the doping Mn element can effectively adjusts the intrinsic conduction mechanism and then predicts the optimal atmosphere.

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Quantitative evaluation of the oxidation behavior of ZrB2-15 vol.%SiC at a low oxygen partial pressure

Vacuum ◽

10.1016/j.vacuum.2012.04.004 ◽

2013 ◽

Vol 88 ◽

pp. 98-102 ◽

Cited By ~ 9

Author(s):

Ai Momozawa ◽

Rong Tu ◽

Takashi Goto ◽

Yuuki Kubota ◽

Hiroshi Hatta ◽

...

Keyword(s):

Oxygen Partial Pressure ◽

Partial Pressure ◽

Quantitative Evaluation ◽

Oxidation Behavior ◽

Low Oxygen

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Surface oxidation of Alloy 617 in low oxygen partial pressure He–CO–CO2 environments at 750–850 °C

Corrosion Science ◽

10.1016/j.corsci.2014.10.042 ◽

2015 ◽

Vol 90 ◽

pp. 529-534 ◽

Cited By ~ 6

Author(s):

G. Gulsoy ◽

G.S. Was

Keyword(s):

Oxygen Partial Pressure ◽

Partial Pressure ◽

Surface Oxidation ◽

Low Oxygen ◽

Alloy 617

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Enhanced superconductivity in Nd1+xBa2-xCu3O7+δby low oxygen partial pressure annealing

Journal of Electronic Materials ◽

10.1007/bf02649956 ◽

1994 ◽

Vol 23 (11) ◽

pp. 1117-1120 ◽

Cited By ~ 18

Author(s):

M. J. Kramer ◽

A. Karion ◽

K. W. Dennis ◽

M. Park ◽

R. W. McCallum

Keyword(s):

Oxygen Partial Pressure ◽

Partial Pressure ◽

Low Oxygen ◽

Enhanced Superconductivity

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Tensile Properties and Creep Behavior of SiC-Based Fibers under Various Oxygen Partial Pressures

Materials Science Forum ◽

10.4028/www.scientific.net/msf.475-479.1333 ◽

2005 ◽

Vol 475-479 ◽

pp. 1333-1336 ◽

Cited By ~ 5

Author(s):

Jan Ji Sha ◽

J.S. Park ◽

Tatsuya Hinoki ◽

Akira Kohyama ◽

J. Yu

Keyword(s):

Oxygen Partial Pressure ◽

Partial Pressure ◽

Tensile Properties ◽

Creep Behavior ◽

Elevated Temperatures ◽

Low Oxygen ◽

X Ray Diffraction ◽

Sic Fibers ◽

Partial Pressures ◽

Ar Gas

Three kinds of atmospheres (air, highly-pure Ar and ultra highly-pure Ar gas) with different oxygen partial pressures were applied to investigate the tensile properties and creep behavior of SiC fibers such as Hi-NicalonTM and TyrannoTM-SA. These fibers were annealed and crept at elevated temperatures ranging from1273-1773 K in such environments. After annealing at 1773 K, the room temperature tensile strengths of SiC-based fibers decreased with decreasing the oxygen partial pressure and the near stoichiometric fiber TyrannoTM-SA shows excellent strength retention. At temperatures above the 1573 K, the creep resistance of SiC fibers evaluated by bending stress relaxation (BSR) method under high oxygen partial pressure was lower than that of in low oxygen partial pressure. The microstructural features on these fibers were examined by scanning electron microscopy (SEM) and X-ray diffraction (XRD).

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