Preparation of porous PZT with high connectivity using capsule-free O2-HIP and their dielectric properties

1992 ◽  
Vol 131 (1) ◽  
pp. 75-82 ◽  
Author(s):  
T. Hayashi ◽  
S. Sugihara ◽  
K. Okazaki
Keyword(s):  
Dielectric Properties ◽  
High Connectivity ◽  
Porous Pzt

New Processing and Evaluation of Porous PZT with High Connectivity Using Capsule-Free O2 HIP

1991 ◽  
Vol 251 ◽  
Author(s):  
Sunao Sugihara ◽  
Takashi Hayashi ◽  
Kiyoshi Okazaki
Keyword(s):  
Bending Strength ◽  
Homogeneous Microstructure ◽  
Pzt Ceramics ◽  
Gas Atmosphere ◽  
Bimodal Pore Size Distribution ◽  
Conventional Sintering ◽  
High Connectivity ◽  
New Processing ◽  
Pmma Particles ◽  
Porous Pzt

ABSTRACTNew processing of porous PZT ceramics with high connectivity was investigated using capsule-free O2 HIP technology. Porous PZT bodies were prepared by pressureless-sintering of green compacts with various amounts of spherical PMMA particles, followed by hot isostatically pressed at 1100°C and 200 MPa for 1 hour in 5%O2/Ar mixture gas atmosphere. The densification of porous PZT sintered bodies hardly occurred by capsule-free O2 treatment, resulting in the formation of well-developed neck growth between PZT grains. They exhibted a homogeneous microstructure with a bimodal pore size distribution consisting of both several ¼m and 50–80¼m pore sizes.The capsule-free O2 HIPed porous PZT bodies have a larger permittivity and a smaller depolarizing factor about a half than the specimens before O2 -HIPing, suggesting that the HIPed PZT has a higher connectivity. Piezoelectric g33 constant-porosity relations were also described and mechanical property was discussed to indicate an increase of bending strength more than 20% compared to conventional sintering.

Effect of porosity on dielectric properties and microstructure of porous PZT ceramics

2006 ◽  
Vol 127 (2-3) ◽  
pp. 130-133 ◽  
Author(s):  
B. Praveen Kumar ◽  
H.H. Kumar ◽  
D.K. Kharat
Keyword(s):  
Dielectric Properties ◽  
Pzt Ceramics ◽  
Porous Pzt

SYNTHESIS AND DIELECTRIC PROPERTIES OF LIQUID CRYSTALS CONTAINING TWO CYANO GROUPS

1979 ◽  
Vol 40 (C3) ◽  
pp. C3-37-C3-40
Author(s):  
L. A. KARAMYSHEVA ◽  
S. I. TORGOVA ◽  
E. I. KOVSHEV ◽  
M. I. BARNIK
Keyword(s):  
Liquid Crystals ◽  
Dielectric Properties ◽  
Cyano Groups

Investigation of Dielectric Properties of (1-x) Ni0.53Cu0.12Zn0.35Fe1.88O4 ferrite + (x) Gd0.2Ce0.8O3 for Multilayer Chip Inductors

2012 ◽  
Vol 03 (1) ◽  
pp. 71-73
Author(s):  
S. Bharadwaj ◽  
◽  
Suman Kumar Burnwal ◽  
T. Ramesh ◽  
S.R. Murthy ◽  
...  
Keyword(s):  
Dielectric Properties

Effect of Cow Manure on Dielectric Properties of Clay Loam Soil at Microwave Frequency

2012 ◽  
Vol 2 (2) ◽  
pp. 374-375
Author(s):  
Asha Buliya ◽  
◽  
K. C. Pancholi K. C. Pancholi ◽  
R. K. Paliwal R. K. Paliwal
Keyword(s):  
Dielectric Properties ◽  
Microwave Frequency ◽  
Cow Manure ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Loam Soil
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