Structural, Optical, and Dielectric Properties of Zirconium Titanate Ceramic Composite Synthesized by Solid-State Reaction

Sravanthi, M. Naga; Sudagar, J.

doi:10.1007/s11665-023-08827-z

Cited by 1 publication

(1 citation statement)

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“…This is because impurity states can interact with the electronic states of the host material, causing energy levels to move and the bandgap to shift. In my previous work, the ZrO2 band gap was decreased slightly by doping with TiO2 and observed as 5.36 ev [39]; in our case, after adding TiO2 with CeO2 to ZrO2, the band gap of ZrO2 decreased to 3.62 eV. The band gap of Z0.85C0.10T0.05 ceramic composites tends to shrink as the sintering temperature is raised.…”

Section: Resultssupporting

confidence: 50%

Effect of CeO<sub>2</sub> Doped Zirconium Titanate with Various Temperatures by Solid-State Reaction Method

Naga Sravanthi,

Jothi,

Selva Kumar

2023

MSF

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The synthesis of ceramic composites consisting of cerium and titanium-doped zirconium (ZCT) oxide was achieved by the solid-state reaction technique. The ZCT composite ceramic powder undergoes sintering at various temperatures, including room temperature (RT), 1000°C, 1100°C, 1200°C, and 1300°C. Extensive study has been conducted on ceria-based materials in the field of catalysis, owing to their vast array of uses. Nevertheless, there was a limited amount of research conducted on the impact of ceria in the solid-state reaction approach. The current study employed a solid-state reaction method to fabricate ceramic composites comprising ZrO2, CeO2, and TiO2. Various sintering temperatures were employed in the process. This study aimed to evaluate the impact of the sintering effect of ZCT ceramic oxides on several aspects, including crystal structure, surface morphology, optical properties, and electrical properties. The ZCT ceramic oxide underwent sintering at room temperature (RT), 1000°C, and 1100°C, resulting in the formation of a monoclinic crystal structure. However, sintering at 1200°C and 1300°C led to the presence of mixed phases, characterized by both monoclinic and tetragonal crystal structures, as observed through X-ray diffraction (XRD) analysis. When the sintering temperature is increased from 1000 to 1300°C, there is a modest drop in the band gap of a ZCT material from 3.43eV to 3.25eV. frequency(1mHZ-200kHz) dependence of dielectric constant, dielectric loss and ac electrical conductivity of the synthesized composites were carried out. The results indicate that dielectric constant and loss decreases with frequency rises and reaches a constant value at higher frequencies. The electrical conductivity of all ZCT samples exhibits an increase as the frequency is raised, whereas it reaches a minimum at lower frequencies.

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Section: Resultssupporting

confidence: 50%