Karakterisasi Arus-Tegangan Sensor Gas Hidrogen dari Bahan Komposit TiO2-SrCO3

Authors

  • Hudya Fitra Hasmin Laboratorium Fisika Material, Jurusan Fisika, FMIPA, Universitas Andalas
  • Elvaswer Elvaswer Laboratorium Fisika Material, Jurusan Fisika, FMIPA, Universitas Andalas

DOI:

https://doi.org/10.25077/jfu.8.1.26-33.2019

Abstract

Telah dilakukan karakterisasi sensor gas hidrogen berupa pelet dengan bahan komposit TiO2-SrCO3. Pelet sensor gas hidrogen dibuat dengan komposisi yang berbeda untuk setiap sampel. Proses pembuatan sensor gas hidrogen diawali dengan pencampuran bahan, kalsinasi pada temperatur 500°C selama 4 jam, penggerusan, kompaksi dan sintering pada temperatur 700°C selama 4 jam dengan mengunakan metode reaksi dalam keadaan padat. Sensor gas hidrogen diuji pada temperatur ruang dengan pengukuran karakteristik I-V, nilai sensitivitas, selektivitas, konduktivitas, waktu respon, dan karakterisasi XRD. Berdasarkan pengukuran karakteristik I-V diperoleh bahwa bahan dengan komposisi 70% mol TiO2 + 30% mol SrCO3 memiliki sensitivitas dan selektivitas tertinggi. Nilai sensitivitas yang diperoleh yaitu 4,4 pada tegangan 24 volt, sedangkan nilai selektivitas yaitu 3,26 pada tegangan 24 volt. Nilai konduktivitas tertinggi dimiliki bahan dengan komposisi 70% mol TiO2 + 30% mol SrCO3 yaitu 8.44 x 10-4/Ωm pada lingkungan hidrogen. Waktu respon bahan dengan komposisi 70% mol TiO2 + 30% mol SrCO3 terhadap gas hidrogen adalah 43 s dan waktu respon terhadap gas oksigen adalah 49 s pada tegangan 24 volt. Hasil XRD menunjukkan ukuran kristal 100% TiO2 yaitu 149,01 nm, ukuran kristal 100% SrCO3 yaitu 127,128 nm, dan ukuran kristal 70% TiO2 + 30% SrCO3 adalah 159, 315 nm. Campuran TiO2 didoping SrCO3 telah terbentuk senyawa baru yaitu Sr2(TiO4).

 Kata kunci: sensor, TiO2-SrCO3, gas hidrogen, sensitivitas, waktu respon

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Published

2019-01-02

How to Cite

Hasmin, H. F., & Elvaswer, E. (2019). Karakterisasi Arus-Tegangan Sensor Gas Hidrogen dari Bahan Komposit TiO2-SrCO3. Jurnal Fisika Unand, 8(1), 26–33. https://doi.org/10.25077/jfu.8.1.26-33.2019

Issue

Vol. 8 No. 1 (2019)

Section

Articles

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Copyright (c) 2019 Hudya Fitra Hasmin, Elvaswer Elvaswer

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