[en] The studies have shown that crystalline ceramics are better hosts compared to glass matrix due to their superior chemical durability and higher density. Synroc, atitanate based ceramic containing hollandite, perovskite, zirconolite and rutile phases, is considered as the most effective and durable means of immobilizing various forms of high-level radioactive wastes for disposal. The oxide-route (solid state reaction) is the most known process to form a solid solution. However, the synthesis of nano crystalline powders using an exothermic redox reaction between nitrate and organics in an aqueous solution has been reported. In this study, the SCS and oxide route was compared to form the solid solution of Synroc-B nano crystalline powders. TEM mapping results on combustion synthesized powder has been confirmed that it contains the fully solid solution occurred on constituent elements for the composition Synroc-B in all powders. TEM analyses also show that particle size is very homogeneous and evenly distributed in 20257-258⁓30 nm. By a combustion synthesis method Synroc-B nano powder of a multi-phase is could be produced in a relatively easy way. Solidified in the Synroc-B complex, radioactive elements contained in waste can easily be immobilized