Ceramic nanoparticles are among the most important materials that are widely used in industries. The microelectronics and nanoelectronics industries, medicine and pharmaceuticals, cosmetics, food and other fields are the subject of this category of materials. Therefore, various research and studies on the development of effective and scalable methods for the synthesis of nanoparticles have brought different results and achievements. One of these achievements is the flame spray pyrolysis technology that has been researching and developing since the past. Therefore, the present research has investigated the synthesis of ceramic nanoparticles using this technology. After exploring different methods, required synthesizing setup for this research was prepared. In this method, the precursor is sprayed into a hydrocarbon flame. The necessary enthalpy is provided to decompose the precursor and synthesize metal oxide nanoparticles by the flame heat. In the synthesis of Aluminum oxide (Al 2 O 3 ), Zinc oxide (ZnO) and Manganese oxide (Mn 3 O 4 ) nanoparticles, organic and inorganic precursors were used to determine their effects in prepared samples. The flame temperature was measured at the highest point almost 1000 ? and 700 ? for organic and inorganic samples respectively. The obtained powders were divided into two groups, one of them annealed in furnace, and the other one remained without any heat treatment for investigating by EDX, XRD, SEM, and FESEM analyzes. Using EDX, the presence of elements in the sample were studied and the XRD utilized to analyze the sample phase. In addition, the SEM and FESEM images revealed the size of the particles and their morphology, and indicated that various precursors of a metal effect the morphology and particle size. The mean particle size of Aluminum oxide nanoparticles was obtained 80 nm using inorganic precursor. The same values were about 40 nm and 25 nm, for Zinc oxide and 60 nm and 40 nm for Manganese oxide nanoparticles synthesized using inorganic and organic precursors, respectively. Examining FESEM micrographs of annealed samples revealed that the particles in this process have grown and formed larger particles. The mentioned sintering process behaves different routines for nanoparticles derived from organic and inorganic precursors.
