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Electrical characteristics of NTC thermistor ceramics made of mechanically activated Fe2O3 powder derived from yarosite
Syarif D.G.a, Ramelan A.b
a Nuclear Technology Center for Materials and Radiometry-BATAN, Indonesia
b Material Study Program, ITB, Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]Electrical characteristics of ceramics for NTC thermistor made of mechanically activated Fe2O3 powder which was derived from yarosite mineral has been studied. The powder of Fe2O3 was derived from yarosite mineral by precipitation and calcination. The powder was mechanically activated by blending using an electric blending machine. The ceramics were produced by pressing the calcined and activated powders to produce pellets and sintering the pellets at 1100°C and 1200°C for 1 hour in air. Electrical characterization was done by measuring electrical resistivity of the ceramics at various temperatures (25°C-100°C). Microstructure and structural analyses were carried out by using a Scanning Electron Microscope (SEM) and X-ray diffraction (XRD), respectively. The XRD analyses showed that the sintered ceramics had crystal structure of hexagonal (hematite). The presence of second phase could not be identified from the XRD analyses. From SEM data, it was known that the ceramics from activated powder had larger grains due to small size of the activated powder. According to the electrical data, it was known that the ceramics made of the activated powder had lower thermistor constant (B) and room temperature electrical resistivity (ρRT). The value of B and ρRT of the produced ceramics fitted market requirement. © 2008 American Institute of Physics.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Fe203,NTC,Powder activation,Thermistor,Yarosite[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1063/1.2906043[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]