Fabrication of Gadolinium Oxide-doped Fe2O3-LaFeO3-La2O3 Thick Films by Screen Printing Technique and Their Electrical Properties for Ethanol Gas Sensors
Agustina(a), Muhamad Taufik Ulhakim(a), Andhy Setiawan(a), Dani Gustaman Syarif(b),Endi Suhendi(a*)

(a) Physics Study Program, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229 Bandung, Indonesia
*endis[at]upi.edu
(b) Center of Science and Technology of Applied Nuclear, National Nuclear Energy Agency of Indonesia (BATAN), Jl. Tamansari No. 71 Bandung, Indonesia

Abstract

Recently, there are many researchers who discussed the screen printing techniques (SPT) as a good approached to fabricated the thick films for gas sensors application. In this work, the SPT were conducted to fabricated the thick films based on gadolinium oxide-doped Fe2O3-LaFeO3-La2O3 that applied as ethanol gas sensors. The crystal and morphological structures were investigated using x-ray diffraction and scanning electron microscopy, respectively. It is shows that there are three phase of crystal structure of gadolinium oxide-doped Fe2O3-LaFeO3-La2O3 i.e. rhombohedral, orthorombic, and hexagonal. The morphological structure shows the average particel size of about 0.61 μm. Furthermore, the electrical properties measurement were explore to ensure the performances of thick films on detecting the ethanol gases. The measurement were conducted in the range of temperature of about 310 &deg-C to 325 &deg-C and in the various of ethanol gas containing, it is 0 ppm, 100 ppm, 200 ppm, and 300 ppm. This result showed that the highest response of thick films in existence of ethanol gases (300 ppm) is 427 with optimum temperature of 319 &deg-C. It is also confirmed that SPT as an excellent approached in thick film fabrication to produce gas sensor device with a good performances.

Keywords: Screen-printing techniques (SPT)- Gadolinium Oxide- Fe2O3-LaFeO3-La2O3- Ethanol gas sensors

Topic: Physics