NiFe₂O₄/nano-TiN ceramics were synthesized by a two-step cold-pressing sintering process. Sintering behavior, fracture morphology, mechanical performance and high-temperature conductivity were investigated. The results indicated that besides NiO and NiFe₂O₄, new Ni₃TiO₅ and metallic phases (iron and nickel) formed in the sintered samples. TiN accelerated the grain growth along with considerable quantity of micro-pores in the sintered samples. Compared to the un-doped samples, the temperature for the onset of sintering of the NiO-Fe₂O₃-2.0 wt.% TiN system decreased from 1093 to 985 °C. TiN addition changed the sintering mechanism of the NiO-Fe₂O₃ from grain boundary diffusion to volume diffusion. TiN additions reduce the apparent sintering activation energy and porosities and improve the density, bending strength, and pyroconductivity. Three-dimensional fracture morphology of the composite ceramics synthesized under argon atmosphere, exhibits self-similarity characteristics and the fractal dimension for NiFe₂O₄-1.0 wt.% TiN ceramics is 2.0813.

通过两步冷压烧结法合成了NiFe ₂ O ₄ /纳米TiN陶瓷。研究了烧结行为，断裂形态，力学性能和高温导电性。结果表明，除了NiO和NiFe ₂ O _4之外，烧结样品中还形成了新的Ni ₃ TiO ₅和金属相（铁和镍）。TiN促进了晶粒的生长，并在烧结后的样品中形成了大量的微孔。与未掺杂样品相比，NiO-Fe ₂ O ₃烧结开始的温度-2.0 wt。％TiN系统从1093降低到985°C。TiN的添加将NiO-Fe ₂ O ₃的烧结机理从晶界扩散转变为体积扩散。TiN的添加减少了明显的烧结活化能和孔隙率，并提高了密度，弯曲强度和热导率。在氩气氛下合成的复合陶瓷的三维断裂形态，表现出自相似性，NiFe ₂ O ₄ -1.0 wt。％TiN陶瓷的分形维数为2.0813。