TY - JOUR
T1 - Effect of milling duration on structural properties of polycrystalline bulk barium hexaferrite
AU - Nishkala, K. R.
AU - Radhakrishna Rao, Rajat
AU - Mutalik, Srinivas
AU - Murari, M. S.
AU - Daivajna, Mamatha D.
N1 - Funding Information:
The author (Nishkala) is grateful to Manipal Academy of Higher Education , Manipal for providing financial assistance; Dr. Sudhindra Rayaprol, UGC-DAE CSR Mumbai for XRD measurements; Dr. Sudha D. Kamath, MIT, Manipal for density measurements.
Funding Information:
The author (Nishkala) is grateful to Manipal Academy of Higher Education, Manipal for providing financial assistance; Dr. Sudhindra Rayaprol, UGC-DAE CSR Mumbai for XRD measurements; Dr. Sudha D. Kamath, MIT, Manipal for density measurements.
Publisher Copyright:
© 2022
PY - 2022/1
Y1 - 2022/1
N2 - Polycrystalline bulk Barium hexaferrite, BaFe12O19 were synthesised by ball milling for different milling duration followed by sintering at high temperature. Effect of milling duration on structural, morphological and dc electrical properties were studied for 4, 8, 12 and 16 h of milling using planetary ball mill. X-ray diffraction measurement data shows the formation of single phase barium hexaferrite which belongs to P63/mmc group for 8, 12 and 16 h milled samples. There is formation of intermediate phase along with M−phase of barium hexaferrite in 4 h milled sample. Inverse relation of the crystallite size and lattice strain was observed. The saturation value of crystallite size and maximum lattice strain were observed for 12 h milled sample. Morphological studies for 8 and 16 h milled samples reveals the formation of hexagonal plate like grains for the former and agglomerates with different grain size for the latter. High porosity for 8 h milled sample was observed by density measurements. Resistivity of the samples measured from I-V characteristics using 2 probe method exhibits maximum resistivity for 8 h milled sample and minimum resistivity for 12 h milled samples. Linear relationship was observed between electrical resistivity and porosity.
AB - Polycrystalline bulk Barium hexaferrite, BaFe12O19 were synthesised by ball milling for different milling duration followed by sintering at high temperature. Effect of milling duration on structural, morphological and dc electrical properties were studied for 4, 8, 12 and 16 h of milling using planetary ball mill. X-ray diffraction measurement data shows the formation of single phase barium hexaferrite which belongs to P63/mmc group for 8, 12 and 16 h milled samples. There is formation of intermediate phase along with M−phase of barium hexaferrite in 4 h milled sample. Inverse relation of the crystallite size and lattice strain was observed. The saturation value of crystallite size and maximum lattice strain were observed for 12 h milled sample. Morphological studies for 8 and 16 h milled samples reveals the formation of hexagonal plate like grains for the former and agglomerates with different grain size for the latter. High porosity for 8 h milled sample was observed by density measurements. Resistivity of the samples measured from I-V characteristics using 2 probe method exhibits maximum resistivity for 8 h milled sample and minimum resistivity for 12 h milled samples. Linear relationship was observed between electrical resistivity and porosity.
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U2 - 10.1016/j.matpr.2022.01.326
DO - 10.1016/j.matpr.2022.01.326
M3 - Article
AN - SCOPUS:85128651975
VL - 58
SP - 631
EP - 637
JO - Materials Today: Proceedings
JF - Materials Today: Proceedings
SN - 2214-7853
ER -