Synthesis and Characterization of Ca3Co4O9 Ceramic by using Sol-Gel Method

Sigit Dwi Yudanto (Lembaga Ilmu Pengetahuan Indonesia)
Septian Adi Chandra (Lembaga Ilmu Pengetahuan Indonesia)
Rahadian Roberto (Lembaga Ilmu Pengetahuan Indonesia)
Dedi Pria Utama (Lembaga Ilmu Pengetahuan Indonesia)
Lusiana - (Lembaga Ilmu Pengetahuan Indonesia)
Wafi Ahdilah (Universitas Teknologi Sumbawa)
Virginia Octa Herlina (Universitas Teknologi Sumbawa)

Jurnal Keramik dan Gelas Indonesia
Vol 30, No 1 (2021): Jurnal Keramik dan Gelas Indonesia

We report the synthesis  of Ca3Co4O9  ceramics by the Sol-Gel method with citric acid as the chelating agent.   Calcium   nitrate   and   cobalt   nitrate   as precursors were weighed at an atomic ratio of Ca: Co = 3: 4. The process starts with gel preparation, followed by drying, calcination, and compaction process. The pellets were sintered at 820°C, 860°C, and 900°C for 6 hours in a furnace without flowing gas. The effect of sintering temperature on the formation of the Ca3Co4O9  phase was analyzed using an X-ray diffractometer.  The  Ca3Co4O9   phase has  formed in samples sintered at 820°C with the Co3O4  phase as an impurity. Based on the calculation, the crystallite size decreases with increasing sintering temperature