LaCrO3 is promising for modern material science due to its extraordinary thermoelectric, catalytic and optical properties. Lanthanum chromite solgel synthesis based on microwave-initiated co-precipitation reaction with presence of reductant is discussed in this article. X-ray powder diffraction method was used for characterization of synthesized LaCrO3 sample. Obtained samples were sonicated to disperse porous aggregates formed on final step of synthesis. Particle sizes were measured by laser diffraction and it is shown that bulk quantity of particles has an approximate size of 310 nm. SEM investigations of LaCrO3 particles before and after sonication were carried out. It is found that bulky aggregations are brittle and easily dispersed by sonication. Synthesized particles are flackshaped.