Nanocrystalline SrHfO3 synthesized through a single step auto-igniting combustion technique and its characterization

High Dielectric Permittivity of α-NaFeO2-Type Layered Nitrides

“…To probe the dielectric response of SrHfN 2 and SrZrN 2 , we carried out DFT calculations to obtain the Born effective charge tensors and macroscopic dielectric tensors based on DFPT. DFPT dielectric calculations have been successfully applied in many materials and were validated in some cases, including in ZrO 2 and CaTiO 3 systems, ,, and here further verified by the oxide counterparts SrZrO 3 and SrHfO 3 of SrZrN 2 and SrHfN 2 , respectively, which reproduced their experimentally measured dielectric permittivities [e.g., 21–35 for SrHfO 3 − and SrZrO 3 , vs their calculated values of 46 and 50, respectively (details listed in Table S3)].…”

WITHDRAWN: Synthesis and Characterization of SrHfO3 Co-doped with Gd2O3 and Yb2O3 (SHGY)

“…5. The TG plot shows the weight loss is in three steps attributable to (i) Dehydration, which can caused by the absorbed moisture weight loss of 2% at about 100ºC [21] (ii) Decomposition, low molecular weight compounds such as additives, crystallization water and rst decomposition products such as intermediate carbonate and (iii) Finally weight loss of < 3% at 970ºC in the plot. Thereafter from the DTA plot no abnormal changes occur during the process means that there is no entropy change, which implies that no organic matter is present in the sample and combustion is completed.…”

High dielectric constant and capacitance in ultrasmall (2.5 nm) SrHfO3 perovskite nanoparticles produced in a low temperature non-aqueous sol–gel route

“…SrHfO 3 requires prolonged calcination at 1100-1200 C for several hours, 27 oen along with inter-mediate grinding 28 to form in solid-state reactions, with large consequential grain growth, and requires even higher temperatures of 1600-1750 C to be sintered. 29 Even in thin lm form, it needs to be annealed at 650-800 C to become crystalline. 15 Pure and doped SrHfO 3 NPs have been formed by combustion synthesis, and Ce-doped SrHfO 3 has been made by sol-gel synthesis for possible use in laser and scintillator applications, but even though these required lower temperatures in some cases, the smallest NPs produced were still 40 nm.…”

“…15 Pure and doped SrHfO 3 NPs have been formed by combustion synthesis, and Ce-doped SrHfO 3 has been made by sol-gel synthesis for possible use in laser and scintillator applications, but even though these required lower temperatures in some cases, the smallest NPs produced were still 40 nm. 29 10-20 nm SrHfO 3 NPs were made by a complex process using hafnium metallocenes and strontium alkoxides, but a synthesis temperature of 800 C was still required. 30 Hydrothermal and solvothermal methods are particularly useful for producing perovskite NPs at lower temperatures, and they can be applied to synthesise broad classes of NPs, while controlling particle size and morphology.…”