The study investigates the time-dependent deformation of LaCoO 3 under constant uniaxial compressive stresses at various temperatures ranging from room temperature to 880 degrees C. Through the acquisition of stress-strain curves at different temperatures, it has been observed that LaCoO 3 exhibits non-linear ferroelastic behavior. The stiffness of LaCoO 3 increases with temperature, up to 600 degrees C, after which it starts to decrease at higher temperatures. Furthermore, negative creep occurs at lower temperatures, whereas positive creep is observed at temperatures exceeding 600 degrees C. This can be attributed to transitioning from a ferroelastic creep at low temperatures to a combination of ferroelastic and high -temperature conventional creep at temperatures above 600 degrees C. The magnitude of both negative and positive creep is proportional to the temperature. The structural stability of LaCoO 3 under creep loading at all temperatures has been assessed by comparing pre -test and post -test X-ray diffraction analyses, which showed the texture formation after testing.