Title :
Heat treatment effects on dielectric properties of SrFe12O19 Hexaferrite prepared by an SHS route
Author :
Panchal, Nital R. ; Jotania, Rajshree B.
Author_Institution :
Dept. of Phys., Gujarat Univ., Ahmedabad, India
Abstract :
The M-type Strontium Hexaferrite SrFe12O19 particles were prepared by a Self propagating High temperature Synthesis (SHS) route. Precursors were heated under two different conditions: microwave heating for 30 minutes and sintered at 950°C for 4 hrs. The dielectric properties: dielectric constant (ε´), dielectric loss (tan δ) and ac conductivity (σac) were measured at room temperature in the frequency range from 100 Hz to 2 MHz. The samples present a non-linear behavior for the dielectric constant at 1 kHz, 100 kHz and 2 MHz. The dielectric properties of prepared Strontium Hexaferrite samples were discussed in view of applications as a material for microwave devices, permanent magnets and high density magnetic recording media.
Keywords :
combustion synthesis; dielectric losses; ferrites; heat treatment; permittivity; strontium compounds; M-type strontium hexaferrite; SHS route; SrFe12O19; ac conductivity; dielectric constant; dielectric loss; dielectric properties; frequency 100 Hz to 2 MHz; heat treatment; high density magnetic recording media; microwave devices; microwave heating; permanent magnets; self-propagating high temperature synthesis; temperature 293 K to 298 K; temperature 950 C; time 30 min; time 4 hour; Conductivity; Dielectric constant; Electromagnetic heating; Ferrites; Microwave theory and techniques; Hexaferrites; dielectric properties; microwave devices; microwave heating;
Conference_Titel :
Vacuum Electronics Conference (IVEC), 2011 IEEE International
Conference_Location :
Bangalore
Print_ISBN :
978-1-4244-8662-5
DOI :
10.1109/IVEC.2011.5747094
