Back to Search
Start Over
High temperature dielectrics in the ceramic system K0.5Bi0.5TiO3-Ba(Zr0.2Ti0.8)O3-Bi(Zn2/3Nb1/3)O3
- Source :
- Ceramics International. 43:7724-7727
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- Ceramics in the system (1-x)[0.5K 0.5 Bi 0.5 TiO 3 -0.5Ba(Zr 0.2 Ti 0.8 )O 3 ]-xBi(Zn 2/3 Nb 1/3 )O 3 have been fabricated by a solid-state processing route for compositions x≤0.3. The materials are relaxor dielectrics. The temperature of maximum relative permittivity, T m , decreased from 150 °C for composition x=0, to 70 °C for x=0.2. The x=0.2 sample displayed a wide temperature range of stable relative permittivity, e r , such that e r =805±15% from −20 to 600 °C (1 kHz). Dielectric loss tangent was ≤0.02 from 50 °C to 450 °C (1 kHz), but due to the tanδ dispersion peak, the value increased to 0.09 as temperatures fell from 50 °C to −20 °C. Values of dc resistivity were of the order of ~10 9 Ω m at 300 °C. These properties are promising in the context of developing new high temperature capacitor materials.
- Subjects :
- 010302 applied physics
Materials science
Process Chemistry and Technology
Analytical chemistry
Relative permittivity
Context (language use)
02 engineering and technology
Dielectric
Atmospheric temperature range
021001 nanoscience & nanotechnology
01 natural sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Electrical resistivity and conductivity
visual_art
0103 physical sciences
Materials Chemistry
Ceramics and Composites
visual_art.visual_art_medium
Dielectric loss
Ceramic
0210 nano-technology
Dispersion (chemistry)
Subjects
Details
- ISSN :
- 02728842
- Volume :
- 43
- Database :
- OpenAIRE
- Journal :
- Ceramics International
- Accession number :
- edsair.doi...........0b1ee517b8122658c5a672f43733407d