We　report　a　method　for　synthesizing　different　phases　of　samarium-cobalt　particles　through　microwave-assisted　combustion　combined　with　high-temperature　reduction　and　diffusion,　and　identify　the　optimal　temperature　for　forming　the　1:5　phase　using　this　approach.　Initially,　the　samarium-to-cobalt　ratio　in　a　nitrate　solution　was　determined.　Using　urea　as　both　a　reductant　and　fuel,　samarium-cobalt　oxides　were　synthesized　via　microwave-assisted　combustion.　The　main　components　of　the　oxides　were　confirmed　to　be　SmCoO3　and　Co3O4.　Subsequently,　samarium-cobalt　particles　were　synthesized　at　various　diffusion　temperatures.　The　results　indicate　that　at　700　degrees　C,　the　oxides　were　reduced　to　elemental　Sm　and　Co.　As　the　reduction　temperature　increased,　the　alloying　of　samarium　and　cobalt　occurred,　and　the　particle　size　gradually　increased.　At　900　degrees　C,　a　pure　1:5　phase　was　formed,　with　particle　sizes　of　approximately　800　nm,　a　coercivity　of　35　kOe,　and　a　maximum　energy　product　of　14　MGOe.　Based　on　the　microwave-assisted　combustion　method,　this　study　clarifies　the　transition　temperatures　of　samarium-cobalt　phases　during　the　reduction　and　diffusion　process,　and　further　establishes　the　synthesis　temperature　for　the　1:5　phase,　providing　new　insights　into　the　preparation　and　development　of　samarium-cobalt　materials　and　potentially　other　rare　earth　materials.