To precisely determine the thermal conductivity of three distinct carbides, a Laser Flash Analysis (LFA) was conducted. The uranium derivative (UC) demonstrated a notably low thermal conductivity, hovering around 25 W/mK, and maintaining relative constancy across the temperature range. Zirconium carbide (ZrC) exhibited an increasing trend in thermal conductivity, while silicon carbide (SiC) displayed a decreasing trend that tends toward a constant value at higher temperatures. This variation in thermal conductivity among different carbides provides insights into their thermal performance and underscores the versatility of carbide ceramics in meeting specific engineering requirements across a spectrum of industries.