Analisis Kemurnian Hasil Sintesis Gadolinium Doped Cerium (GDC) Menggunakan Prekursor Gd2O3 dan Ce(OH)4 Lokal dengan Metode Kopresipitasi
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Abstract
Gadolinium doped cerium (GDC10) banyak dikembangkan sebagai elektrolit ITSOFC. Bahan baku GDC10 diperkirakan dapat memanfaatkan sumber daya alam lokal. Penelitian ini mempelajari sintesis GDC10 menggunakan prekursor Ce(OH)4 (Produk Lokal, 85% Ce) dan Gd2O3 (Produk Lokal, 1,26% Gd) dengan metode kopresipitasi. Tiga jenis senyawa karbonat, yaitu amonium karbonat ((NH4)2CO3), potasium karbonat (K2CO3), dan sodium hidrogen karbonat (NaHCO3), digunakan sebagai agen presipitasi. Serbuk hasil sintesis dikarakterisasi dengan menggunakan X-Ray Diffraction (XRD) dan Fourier Transform Infrared (FTIR). Penambahan berbagai senyawa karbonat sebagai agen presipitasi dengan prekursor berupa gadolinium dan serium lokal dapat menghasilkan serbuk elektrolit GDC10 dengan struktur kristal fluorite kubik. Potasium karbonat memiliki kualitas dan performa yang lebih baik sebagai agen presipitasi untuk menghasilkan serbuk elektrolit GDC10 karena menghasilkan ukuran kristalit yang paling kecil sebesar 0,014 nm dibandingkan jenis GDC10 dengan agen presipitasi lainnya. Namun, masih perlu optimasi pada temperatur kalsinasi untuk menghilangkan pengotor berupa karbonat.
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