【摘要】 本文利用Bi2O3作为烧结促进剂实现了NiCuZn铁氧体在900℃以下烧结．利用TG、DTA、DDTA等分析手段研究Bi2O3的低温烧结机理，并确定最佳烧结温度范围在840～900℃之间．X－ray分析结果表明：加入Bi2O3后生成另相化合物Bi(36)Fe2O(57)烧结后期少量Fe的固溶有助于稳定高温γ－Bi2O3相的立方结构，避免了冷却过程中的晶型转变．Bi(36)Fe2O(57)另相的存在能有效地阻止晶粒长大，从而达到改性的目的．更多还原

【Abstract】 The sintering below 900"C of NiCuZn ferrite was realized by using Bi2O3 additions. Themechanism of low-temperature sintering was discussed by means of TG,DTA and DDTA. The resultshows the optimum sintering temperature range is 850~ 900℃ and a second phase, Bi36FeZO57formed. The solution of Fe is helpful in both stabilizing cubic structure of r-Bi2O3 and keepingaway from crystal transition during cooling. Bi36Fe2O57 prevents grain growth effectively, so thatthe modification of NiCuZn ferrite can be achieved.更多还原