Preparation of Melt Derived 45S5 Bioactive Glass from Rice Hull Ash and Its Characterization

Bioactive glasses are inorganic bone regeneration materials which have been used for bone and cartilage reconstruction in orthopedics, oral, maxillofacial and otological surgery applications, especially based on mainly silicate or phosphate systems [1]. The bioactive glass can be prepared through sol-gel or melting method. Conventionally, commercial silica products such as tetraethylorthosilicate and tetramethylorthosilicate were used as silica sources [2]. Rice husk ash consists high grade (87-97%) of amorphous silica. The extraction of amorphous silica is simple and thus rice husk ash can be used as an alternative low cost silica precursor [3].