Semiconductor Ceramic Mn0.5Fe1.5O3-Fe2O3 from Natural Minerals as Ethanol Gas Sensors

5th International Conference on Advanced Materials Sciences and Technology

Aliah, H.^1 ; Syarif, D.G.^2 ; Iman, R.N.^1 ; Sawitri, A.^1 ; Mada Sanjaya, Mada Sanjaya Mada^1 ; Nurul Subkhi, M.^1 ; Pitriana, P.^3

Department of Physics, UIN Sunan Gunung Djati Bandung, Jl. A. H. Nasution 105, Bandung

40614, Indonesia^1

PTNBR-BATAN, Jl.Tamansari 71, Bandung, Indonesia^2

Department of Physics Educations, UIN Sunan Gunung Djati Bandung, Jl. A. H. Nasution 105, Bandung

40614, Indonesia^3

关键词: Bixbyite;    Ceramic semiconductors;    Jarosites;    N-type semiconductors;    Nanoparticle powders;    Precipitation methods;    Screen printing methods;    Semiconducting materials;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/367/1/012041/pdf
DOI  :  10.1088/1757-899X/367/1/012041

来源: IOP

【 摘 要 】

In this research, Mn and Fe-based ceramic gas sensing were fabricated and characterized. This research used natural mineral which is widely available in Indonesia and intended to observe the characteristics of Mn and Fe-based semiconducting material. Fabricating process of the thick films started by synthesizing the ceramic powder of Fe(OH)3 and Mn oxide material using the precipitation method. The deposition from precipitation method previously was calcined at a temperature of 800 °C to produce nanoparticle powder. Nanoparticle powder that contains Mn and Fe oxide was mixed with an organic vehicle (OV) to produce a paste. Then, the paste was layered on the alumina substrate by using the screen printing method. XRD method was utilized to characterize the thick film crystal structure that has been produced. XRD spectra showed that the ceramic layer was formed from the solid Mn0.5Fe1.5O3 (bixbyite) and Fe2O3. In addition, the electrical properties (resistance) examination was held in the room that contains air and ethanol to determine the sensor sensitivity of ethanol gas. The sensor resistance decreases as the ethanol gas was added, showing that the sensor was sensitive to ethanol gas and an n-type semiconductor. Gas sensor exhibit sensitive characterization of ethanol gas on the concentration of (100 to 300) ppm at a temperature of (150 to 200) °C. This showed that the Mn0.5Fe1.5O3-Fe2O3 ceramic semiconductor could be utilized as the ethanol gas detector.