Liquid-feed flame spray pyrolysis (LF-FSP) of mixtures of alumatrane [Al(OCH2CH2)(3)N]/zinc acetate dihydrate [Zn (O2CCH3)(2)center dot 2(H2O)] or zinc propionate [Zn(O2CCH2CH3)(2)]/aluminum acetylacetonate [Al(Acac)(3)] dissolved in EtOH in known molar ratios can be used to combinatorially generate nanopowders along the ZnO-Al2O3 tie-line. LF-FSP was used to produce (ZnO)(x)(Al2O3)(1-x) powders with x = 0-1.0. Powders were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared, thermal gravimetric analysis, differential thermal analysis, and BET. The resulting powders had average particle sizes (APSs) <100 nm with the majority being <50 nm. Analytical data suggest that at concentrations of interest for transparent conducting oxides, <10 mol% Al2O3 the particle morphologies are combinations of plates and rods that grow with c/a ratios close to 1. The spinel phase dominates at (ZnO)(x)(Al2O3)(1-x) (x = 0.5 and 0.3). In the latter case, the currently accepted phase diagram for the ZnO-Al2O3 couple indicates that phase separation should occur to form zinc spinel (ZnAl2O4) and alpha-alumina. It appears that the rapid quenching during LF-FSP helps to preserve the spinel phase at ambient temperature giving rise to kinetic nanopowder products along the ZnO2-Al2O3 tie-line. Finally, the solubility of ZnO in Al2O3 and vice versa in the materials produced by LF-FSP suggest apparent flame temperatures reached before quenching are 1700 degrees-1800 degrees C. Efforts to re-pass the spinel phase powders, (ZnO)(x)(Al2O3)(1-x), x = 0.5 and 0.3 through the LF-FSP system were made with the hope of generating core shell materials. However, instead the x = 0.5 material generated materials closer to the x = 0.3 composition and pure ZnO nanoparticles that coat the former materials. These results suggest that at LF-FSP flame temperatures ZnO remains in the vapor phase for sufficient times that Al3+ oxyions generated promote nucleation of finer particles leaving essentially phase pure ZnO still in the vapor phase to condense giving the two distinct particle morphologies observed.