Sol‐gel method to obtain the ferroelectromagnetic ceramics (Pb(Fe 0.5 Nb 0.5 )O 3 ) for micromechatronic applications

Lead iron niobate, Pb(Fe 0.5 Nb 0.5 )O 3 belong to a family of materials with a perovskite structure with the general formula A(B′B″)O 3 , where in positions A–Pb ions substitute themselves, and in octahedral positions B′ and B″ ions of iron Fe and niobium Nb in a random way. The Pb(Fe 0.5 Nb 0.5 )O 3 material is characterized by two ordered antiferromagnetic and ferroelectric sub‐systems. A technological process of the ferroelectromagnetic Pb(Fe 0.5 Nb 0.5 )O 3 ceramics have a significant influence on a crystalline structure and a ceramics microstructure. In the present paper, we study a sol‐gel technology of the production of the Pb(Fe 0.5 Nb 0.5 )O 3 ceramics. The obtained specimens were subjected to micro‐structural examinations and tests of mechanical and dielectric properties. Temperature dependences of mechanical loss Q – 1 (T) and Young's modulus E(T) were conducted by an automatic relaxator of acoustic frequencies of a RAK‐3 type and dielectric test were made on a capacity bridge of a QuadTech 1920 Precision LCR Meter type.