Low temperature synthesis and dielectric, ferroelectric and piezoelectric study of microwave sintered BaTiO3 ceramics

Ferroelectric properties and microwave sintering of BaTiO3 synthesized by using the alkoxide-hydroxide sol-gel process

“…Cheng-Sao et al have reported the microwave sintering and grain growth of BaTiO 3 co-doped with Y and Mg [26]. Sonia et al have investigated low-temperature synthesis of BaTiO 3 with microwave heating and found a dielectric constant of 2.5 × 10 3 at room temperature [21]. Recently, Han et al reported a dielectric constant of 3 × 10 5 with high tangent loss for BaTiO 3 ceramics prepared by using microwave sintering [27].…”

“…Many other routes for the preparation of BaTiO 3 powders such as the sol-gel [13,14], hydrothermal [8,15,16], precipitation [17,18] and combustion methods [19] have been reported. In addition, novel methods that have been reported for fast sintering, such as spark plasma sintering (SPS) [20] and microwave sintering [21], are unique alternatives to conventional sintering. Microwave sintering has been used efficiently to sinter a wide variety of oxide and non-oxide ceramics, as well as metal and composite powders.…”

Preparation of BaTiO3 nanopowders by the solution combustion method

“…It should be noted that the Curie temperature of SCS-prepared materials (about 150 °C) is higher and their dielectric permittivity (800-980) is much lower than the corresponding parameters of similar materials synthesized by the sol-gel, chemical, hydrothermal or solid state methods: T C = 120-135 °C and  6000-9000 [13,25,26], the latter values being close to the properties of BaTiO 3 monocrystals. Such low values of dielectric permittivity are typical of nanosized materials and are usually not observed for sintered ceramics.…”

Combustion synthesis of nanostructured Ba0.8(Ca,Sr)0.2TiO3 ceramics and their dielectric properties

“…One of the most important is powder synthesis with a nano-size range ( 100 nm), a controlled stoichiometry and well-defined properties [6,7]. Ferroelectric ceramic, BaTiO 3 are used in capacitor devices [8], piezoelectric devices [9], transducers [10], and thermistors [11]. Ceramic capacitors based on ferroelectric materials have very high capacity and a small size, which enable the miniaturization of electronic devices.…”