To explore the production of ceramic sleeves to protect the thermocouple in aluminum electrolysis, a U-shaped NiFe₂O₄ ceramic tube was produced by slip casting and pressureless sintering. The slurry stability, thermal shock resistance of NiFe₂O₄ ceramic tube, and temperature measurement performance of assembled thermocouple with NiFe₂O₄ ceramic tube were investigated in detail. The slurry stability was enhanced for the narrower size distribution and smaller particles of slurry. The highest average thermal shock of 9.2 was obtained for the samples sintered at 1350 °C for 6 h, resulted from the high binding force of the grains and low linear thermal expansion coefficient. Temperature tests showed that the thermocouple assembled with the U-shaped NiFe₂O₄ ceramic tube was highly responsive and accurate. In addition, its good resistance to thermal shock and corrosion by molten salts make it a potential candidate for industrial temperature measurement applications in an aluminum reduction cell.

为了探索在铝电解中保护热电偶的陶瓷套管的生产，通过滑模铸造和无压烧结生产了U型NiFe ₂ O ₄陶瓷管。NiFe ₂ O ₄陶瓷管的浆料稳定性，抗热震性以及与NiFe ₂ O ₄组装的热电偶的测温性能陶瓷管进行了详细研究。对于更窄的尺寸分布和更小的浆料颗粒，提高了浆料稳定性。在1350°C下烧结6 h的样品获得的最高平均热冲击为9.2，这归因于颗粒的高结合力和低线性热膨胀系数。温度测试表明，与U型NiFe ₂ O ₄陶瓷管组装在一起的热电偶具有高响应性和精确性。此外，它对熔融盐的热冲击和腐蚀具有良好的抵抗力，使其成为铝还原池中工业温度测量应用的潜在候选者。