The paper presents the preparation and characterization of alginate-tricalcium phosphate porous microspheres, in terms of size, morphology, water sorption and structure. Microspheres were prepared by the ionotropic gelation technique using CaCl₂ as cross-linking agent. The effect of the amount of alginate, addition of porogen material, tricalcium phosphate and sintering temperature on density, porosity and microstructure of microporous ceramic granules, and the influence of tricalcium phosphate / alginate solution report on rheological characteristics of ceramic suspensions were investigated. Archimedes method was used for investigating physical properties. Depending on their characteristics, microporous granules may find application in dental, oral/maxillofacial and other orthopaedic surgical procedures.