简约风科学实验化学场景插画素材

Illustrate a cross-sectional schematic. Left side: Porous wood structure with dots (ATMP) and triangles (BX). Right side (upon heating): Gas Phase (above): ATMP decomposes, releasing NH3 clouds and P-species, diluting O2 and enveloping flammable gases. Wood Surface/Interior: Zoom-in shows ATMP reacting with cellulose -OH, forming P-O-C bonds, catalyzing a black, dense intumescent char layer. BX melts, forming a transparent B2O3 glass layer covering the char. This composite layer blocks incoming heat/O2 arrows and traps internal flammable gases. Label: "P-N-B Synergy: Gas Phase Dilution + Condensed Phase Char/Glass Barrier". Use color coding.