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Temperature dependence of dielectric properties of sodium potassium niobate ceramics

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Title Temperature dependence of dielectric properties of sodium potassium niobate ceramics
 
Creator Bhatt, S C
Singh, K
Uniyal, M
Prakash, Om
Singh, Pankaj K
Saxena, R
Semwal, B S
 
Subject Ceramics
Dielectric constant
loss tangent
Electrical conductivity
 
Description 609-612
Dielectric constant, loss tangent and electrical conductivity of Na₀․₅K₀․₅NbO₃ (SPN) ceramic pellets have been measured at 10, 100 and 1000 kHz frequencies and at temperature varying from room temperature to 250ºC. The dielectric constant increases with increase of temperature up to 190ºC at all the three frequencies, and thereafter, it decreases with further increase of temperature, i.e., it shows a structural transition at about 190ºC. The loss tangent also shows similar behaviour as dielectric constant shows. Some variations may be due to relaxation effects and impurities etc. around the sensitive transition region, which are seem to play prominent role in this soft mode region. Electrical conductivity increases with increase in temperature at all the three frequencies.
 
Date 2008-12-18T06:56:59Z
2008-12-18T06:56:59Z
2007-07
 
Type Article
 
Identifier 0019-5596
http://hdl.handle.net/123456789/2626
 
Language en_US
 
Relation G01R 27/26
 
Publisher CSIR
 
Source IJPAP Vol.45(7) [July 2007]