This article presents an experimental study on some thermophysical properties (density, viscosity and adiabatic bulk modulus) of six synthetic oils-based ZrO₂ nanolubricants. Two-step method with ultrasonic disruptor was used to prepare the nanodispersions. The morphology, crystalline degree and elemental composition of nanoparticles were analyzed by electron microscopy. Visual observation, temporal variation of refractive index and dynamic light scattering were used to analyze the stability of the nanolubricants and the average size of the aggregates. The presence of new interactions between nanoparticles and base oils was studied through Fourier transform infrared spectrometer. Vibrating tube densimeters, rotational viscometer and rheometer equipped with cone-plate geometry were used within the temperature range from 278.15 to 373.15 K. The ability of some theoretical simple models to predict densities and viscosities of these nanolubricants as a function of temperature and nanoparticle concentration was also checked.

本文对六种合成油基ZrO _2的一些热物理性质（密度，粘度和绝热体积模量）进行了实验研究。纳米润滑剂。采用超声破碎机的两步法制备了纳米分散体。用电子显微镜分析了纳米颗粒的形貌，结晶度和元素组成。目视观察，折射率的时间变化和动态光散射被用于分析纳米润滑剂的稳定性和聚集体的平均尺寸。通过傅立叶变换红外光谱仪研究了纳米粒子与基础油之间新的相互作用。在278.15至373.15 K的温度范围内，使用了配有锥板几何形状的振动管密度计，旋转粘度计和流变仪。