A scientific illustration showing spherical lithium-based ceramic pebbles inside a laboratory furnace, with a visual representation of different heating rates. Use three groups of pebbles side by side inside the furnace: on the left, a slow heating rate shown with a gentle, dim orange glow and intact pebble surfaces; in the middle, a moderate heating rate with brighter orange glow and slight surface changes; on the right, a fast heating rate with intense red glow, visible surface cracks, or distortions. Add a temperature-time curve overlay above the furnace to symbolize different heating rates. The overall scene should look professional, educational, and suitable for materials science research. please right the spelling of temperature in the picture. See more