Sintering Behavior and Properties of NiFe$lt;inf$gt;2$lt;/inf$gt;O$lt;inf$gt;4$lt;/inf$gt; Ceramic Inert Anode Toughened by Adding NiFe$lt;inf$gt;2$lt;/inf$gt;O$lt;inf$gt;4$lt;/inf$gt; Nanopowder

Fabrication of high‐density NiFe2O4 ceramics by slip casting and pressureless sintering

“…According to the abovementioned calculation process, the exponent m and sintering activation energy Q of green bodies shaped by cold press molding were 1.487 and 288.47 kJ mol −1 , respectively, which were both slightly higher than these for slip casting. Previous research results showed that the exponent m and sintering activation energy Q of pure NiFe 2 O 4 green body shaped by cold press molding were 1.793 and 385.35 kJ mol −1 , respectively, and the exponent m and sintering activation energy of initial sintering stage decreased gradually with the increase in NiFe 2 O 4 nanoparticle 20 . Compared with the pure NiFe 2 O 4 green body, the atomic diffusion capacity could be heightened by enhancive surface defects and vacancies dated from the additional NiFe 2 O 4 nanoparticle and nano‐binder.…”

“…The slurry with excellent stability is able to be obtained by adjusting its composition and pH. On basis of previous research results, 20 the effects of NiFe 2 O 4 nanoparticle and nano‐binder contents on the slurry stability were investigated to obtain high‐quality green body. Micrographs of these raw materials, namely NiFe 2 O 4 powder, NiFe 2 O 4 nanoparticle and nano‐binder, are shown in Figure 1.…”

“…Previous research results showed that the exponent m and sintering activation energy Q of pure NiFe 2 O 4 green body shaped by cold press molding were 1.793 and 385.35 kJ mol −1 , respectively, and the exponent m and sintering activation energy of initial sintering stage decreased gradually with the increase in NiFe 2 O 4 nanoparticle. 20 Compared with the pure NiFe 2 O 4 green body, the atomic diffusion capacity could be heightened by enhancive surface defects and vacancies dated from the additional NiFe 2 O 4 nanoparticle and nano-binder. Meanwhile, the atomic diffusion path would be shortened dramatically as the nanometer additives, as a result, volume diffusion would be preferred for mass transport.…”

“…To obtain a stable slurry for slip casting, several parameters such as particle size, percentage of the dispersant, and pH of slurry should be optimized reasonably. Previous research results show that the addition of NiFe 2 O 4 nanoparticle and nano‐binder is conducive to enhance the density, thermal shock resistance, and corrosion resistance of the material 20 …”

“…Previous research results show that the addition of NiFe 2 O 4 nanoparticle and nano-binder is conducive to enhance the density, thermal shock resistance, and corrosion resistance of the material. 20 To the best of our knowledge, there are few published reports concerning the preparation of high-density NiFe 2 O 4 ceramics by slip casting and pressureless sintering. To build on previous research on NiFe 2 O 4 matrix inert anode for aluminum electrolysis, we demonstrate that high-density NiFe 2 O 4 ceramics can be produced by slip casting and pressureless sintering in the present work.…”