Effect Of Calcination Temperature Research Articles

A study on the performance of alkali-activated materials prepared by thermochemical treatment of ladle furnace slag

In this paper, the effects of different calcination temperatures, flux types, and their corresponding additions on the thermal activation effect of the Ladle furnace slag (LFS) were investigated. A comparative analysis of the properties of the LFS-based geopolymer before and after thermal activation was carried out from a macroscopic perspective. The results showed that the 12CaO·7Al2O3(C12A7) in the LFS is more amorphous after thermal activation, leading to a prolongation in the setting time. When the calcination temperature reached 800 °C, the γ-C2S showed signs of transformation to β-C2S. This, in turn, undoubtedly enhanced the hydration properties of the LFS, as demonstrated by the compressive strength of the samples. In this regard, the compressive strengths of G-H-800, G-H-S5, and G-H-C10 after 28 days were 18.25 MPa, 18.47 MPa, and 24.38 MPa, respectively. They were found to be higher than those of the untreated sample G-Unheated at 8.0 MPa. In addition, the evaluation of the chemical resistance properties showed that the thermally-activated LFS-based geopolymer had good corrosion resistance in both NaCl and NaOH solutions, especially at high concentrations. The compressive strength loss rates of G-Unheated were 33.70% and 29.92% at NaCl and NaOH solution concentrations up to 2 mol/L, respectively. The lowest compressive strength loss rates of 9.21% and 17.83% could be achieved by LFS-based geopolymer after thermal activation under the same conditions. Nevertheless, the results of the high temperature resistance test showed that the compressive strength of the samples all increased at a temperature of 200 °C. However, when the temperature rose to 400 °C, the compressive strength of the samples decreased, except for G-Unheated, which showed a 2% increase in compressive strength. As the temperature was increased further, the compressive strengths of all samples were diminished.

Enhancement of performance and kinetics of layered Li2MnO3 by Fe doping

Layered Li2MnO3 exhibits great potential as a high-capacity cathode used in lithium-ion batteries, but materials synthesized by traditional solid-phase methods exhibit poor activity and poor cycling stability. In this work, Li2MnO3 nanoparticles were synthesized by solid state method combined with high-energy ball milling, in which Fe was doped at transition metal sites to obtain a Li-rich cathode material (Li1.32Fe0.034Mn0.64O2). We systematically studied the effects of Fe doping and calcination temperature on the crystal structure and electrochemical properties and conducted kinetic studies using the galvanostatic intermittent titration technique (GITT), electrical impedance spectroscopy (EIS) and density functional theory (DFT) calculations. Our results demonstrate that the performance was significantly improved, its discharge capacity is about 235 mAh g−1 after 10 cycles compared 138 mAh g−1 of the pristine sample. The GITT and EIS results show that the Fe-doped sample had smaller charge transfer impedance, larger lithium-ion diffusion coefficient and lower internal polarization than the pristine. The activation energy results show the Fe-doped sample has larger activation energy at the late discharging period due to the anion redox reaction activation, indicting its O activation is more active than Li2MnO3. Moreover, the DOS results showed that the Fe-doped sample had a narrow band-gap, indicating good electrical conductivity. The CI-NEB results showed that the Fe-doped sample had a high transition metal ion migration energy barrier, indicating that its structure was stable. In conclusion, Fe doping is helpful to active the anion redox reaction in Li2MnO3 and improve its electrochemical performance as a low cost and high-capacity cathode materials.

Effect of Calcination Temperature and Substitution of Erbium on Structural and Optical Properties of Nickel Zinc Ferrite Nanoparticles

A single composition of erbium-doped nickel zinc ferrite Ni0.5Zn0.5Fe1.95Er0.05O4 is synthesized by the sol-gel autocombustion process. The prepared composition was divided into five equal parts. One of the parts was an as-prepared sample, and remaining four other parts were calcinated at 600, 700, 800, and 900 ∘C to investigate the variation in structural and optical properties with the calcination temperature. The structural characterization was performed using XRD and SEM. Optical properties were analyzed using FTIR and UV-Visible spectral data. XRD patterns confirm the spinel cubic crystal structure and the Fd3m space group. The crystallite size was minimum for the as-prepared sample (17.9452 nm), and the crystallite size was maximum for the sample calcinated at 900 ∘C (29.8481 nm). SEM images revealed the grain size in the interval from 55.38 nm to 177.73 nm, and certain nanotubes were formed in the sample calcinated at 800 ∘C. Optical energy band gap was observed in the interval from 5.556 eV to 3.969 eV. All these testifies to the variations in structural and optical properties of Ni0.5Zn0.5Fe1.95Er0.05O4 with the calcination temperature.

Reliable NO2 sensing and alert system based on Pd-PdO thin film with sub ppm level detection at room temperature

Human and environmental health is greatly affected due to toxic gas emissions in the environment from power generation, transportation and other industries. For real time monitoring of polluting gases, gas sensor should be reliable, robust and stable in all environmental conditions. We report, nanostructured PdO thin film based portable and low voltage (< 5 V) operating NO2 sensor for sensing sub-ppm level of NO2, with limit of detection (LOD) 80 ppb at room-temperature. To optimize the sensor response of PdO thin film prepared by cost effective self-assembly technique films were calcined at 200 °C, 300 °C and 400 °C. Effect of calcination temperatures on film’s surface morphology, composition and energy band gap have been studied using various techniques. The charge carrier concentration, charge carrier transport mechanism, sensitivity, selectivity, repeatability, reproducibility, reliability, linearity etc. have been studied. PdO thin films calcined at 400 °C are most sensitive with approx. 60% and 100% response for 500 ppb and 1 ppm NO2, respectively at room-temperature. After stable response upto 6 months and more was obtained for these, a portable, pocket size electronic device of size (8 × 5 cm) was fabricated and tested successfully, coupling with the sensor film to prepare a wearable sensor.

Effects of calcination temperature on the adsorption ability of polyaluminum chloride (PAC) sludge-derived granules for As(V)

The effect of calcination on the adsorption of As(V) by polyaluminum chloride (PAC) sludge-derived adsorbents in aqueous solution was investigated, and the As(V) adsorption ability of the adsorbent calcined at the optimal temperature was tested in batch and column modes. The characterization results for the calcined sludges indicated the formation of a porous framework and the transition of amorphous Al2O3 to its crystalline form in the sludge calcined at 500 °C. However, the adsorbents fabricated at temperatures >500 °C exhibited less adsorption of As(V) because of transformation of a crystalline phase. On the basis of the results of comparative As(V) adsorption experiments, the sludge calcined at 500 °C (PA500) was selected as the optimal adsorbent. The adsorption of As(V) by PA500 was terminated within 6 h, and its maximum adsorption capacity was 15.9 mg/g when the absorption data were fit to the Langmuir isotherm model. The adsorption of As(V) exhibited a low pH dependence and was strongly affected by the existence of P(V) in form of PO43−. The column results showed that a column filled with 7 g of PA500 maintained an As(V) concentration of <10 μg/L during 150 h of operation at 50 μg/L As(V) and a 1 mL/min flow rate. The stability of the sludge calcined at 500 °C was well demonstrated by a smaller amount of trace metals being leached from the sludge compared with that leached from other sludges. In conclusion, calcination of PAC sludge at an optimal temperature is a promising to fabricate As(V) adsorbents.

Solid-state synthesis of poultry waste derived hydroxyapatite: Effect of calcination temperature on crystallographic parameters and biomedical competency

The efficacy of hydroxyapatite (HAp) in a specific application depends on certain characteristics such as crystallographic parameters, phase, morphology, dimensional anisotropy, particle size, etc. The calcination temperature plays a crucial role in these properties, and selecting the optimum temperature for the intended application is very crucial. In this study, HAp was produced using eggshell of chicken, a type of poultry waste. The synthesis was carried out using the solid-state method. Subsequently, the material was subjected to calcination at three different temperatures: 750 °C, 850 °C, and 950 °C. The prepared S-HAp samples underwent characterization through XRD, FTIR, Raman, FESEM, EDX, DLS particle size (hydrodynamic diameter), and zeta potential. Crystallographic parameters, such as crystallite size (CS), degree of crystallinity (CI), lattice measurements, density of dislocations, micro-strain, and the proportions of β-TCP in terms of percentage and volume, were also calculated. CS was calculated using five methods and CI was estimated using XRD, FTIR and Raman data. The biomedical competency of S-HAp samples in terms of cytotoxicity, hemolysis, antibacterial activity and bioactivity was investigated. Variance in crystallographic parameters with respect to calcination temperature was observed, although variance in biomedical competency was insignificant. The S-HAp samples synthesized using poultry waste were found to be highly biocompatible, bioactive, and antibacterial as well.

Correction to: Effect of MCAA Synthesis and Calcination Temperature on Heterojunction Formation and Photocatalytic Activity of Biphasic TiO2 (B/A)

Correction to: Effect of MCAA Synthesis and Calcination Temperature on Heterojunction Formation and Photocatalytic Activity of Biphasic TiO2 (B/A)

Preparation of nano zinc oxide by alkaline treatment of industrial zinc oxide dust

A new method for the preparation of nano-zinc oxide was proposed for the effective use of zinc oxide dust (ZOD) containing complex impurities recycled and processed from local plants. Fe2+, Fe3+, Ca2+, Mg2+, Mn2+, Cu2+, and Pb2+, Sn4+, Al3+, Si4+, Bi3+ were selectively extracted from ZOD by alkaline leaching combined with precursor firing process. The effects of thermodynamic analysis of ZOD, Sodium hydroxide(NaOH) concentration(2–8 mol/L), leaching time (15–75 min), autothermal temperature of leaching reaction (43–70 °C), leaching liquid/solid ratio (L/S:5–25 mL/g), and pH were investigated during leaching process. Thermogravimetry-differential thermogravimetry (TG-DTG) analyses were carried out on Zinc carbonate hydroxide (Zn5(CO3)2(OH)6) precursor. In addition, the effects of calcination temperature(400–700 °C) and holding time (1.5–4.0 h) of precursors on average particle size of nano-ZnO were also studied. The results showed the leaching rate of Zn2+ reached 98.35% under the optimum conditions as: NaOH concentration of 6 mol/L, L/S of 20 mL/g, and leaching time of 60 min. Separation rates of Pb2+, Sn4+, Al3+, Si4+ reached 94.63%, 85.08%, 98.03%, 91.48%, respectively at pH = 5.5. Zn5 (CO3)2(OH)6 nano precursors were obtained at pH = 7–8. After the precursor of zinc carbonate was calcined at 400–600 °C for 2 h, high purity (99.53%) nano-zinc oxide was obtained with a particle size of 20 nm, a specific surface area of 23.84 m2/g, a porosity of 32.66%, and a zeta potential of −13.2 mV. This article provides an alternative new idea for the green and comprehensive utilization of industrial ZOD dusts with complex compositions.

Enhancing strategies for the activity and H2O resistance of MnCo-CMS flexible SCR catalysts and hydrophobic modification by modulating the surface energy

Melamine sponge is a flexible organic rubber-plastic foam characterized by its highly porous three-dimensional mesh structure. By optimizing the carbonization process of the melamine sponge, NH3-SCR catalysts with enhanced flexibility were developed. In this study, MnCo-CMS (Carbonized melamine sponge) catalysts were synthesized using the impregnation method. Response surface methodology (RSM) and central composite design (CCD) were employed to investigate the effects of impregnation time, loading, and calcination temperature on the mass reaction rate and N2 selectivity. The results showed that loading had the most significant influence, followed by calcination temperature and impregnation time. Under the optimal preparation conditions of 32.5 wt% loading, the calcination temperature at 420 °C, and the impregnation time for 342 min, the mass reaction rate could reach 11.02 cm3min-1g−1, and the N2 selectivity could achieve 87.4 %. Experimental validation confirmed that various preparation processes resulted in catalysts with high SCR activity (rate constant k > 9.5 cm3min-1g−1 and N2 selectivity > 80 %). The Mn-Co loading should be within the range of 28–36 wt%, the calcination temperature within the range of 380–420 °C, and the impregnation time should be 150 min or more. Materials with low surface energy could result in excellent hydrophobicity. In this study, it was found that melamine sponges could be modified into low surface energy carbon foams by temperature modulation. The change in surface energy was utilized as a modification approach to enhance the water resistance of the NH3-SCR catalyst. Importantly, the optimized process significantly improved the stability and water resistance of the catalysts.

Effect of Calcination Temperature on the Powder of Freshwater Snail Shells (Sulcospira testudinaria) Properties

Gastropod shells, such as those from the freshwater snail (Sulcospira testudinaria), have garnered interest as potential sources of calcium precursors. These shells are rich in calcium carbonate (CaCO3), which can be thermally decomposed into calcium oxide (CaO) through calcination. However, more information is needed on optimizing calcium extraction from the Sulcospira testudinaria (SST) shells. This study aims to investigate the influence of calcination temperature on the characteristics of powder of these shells. The study involves two sample treatments: uncalcined shells and shells calcined at temperatures ranging from 500°C to 1100°C for 1 hour. Fourier transform infrared spectroscopy (FTIR) analysis of uncalcined shell powder revealed the presence of aragonite functional groups within the CaCO3 structure. X-ray diffraction (XRD) analysis provided insights into the transformation of crystalline phases of CaCO3, starting from aragonite to calcite and eventually to calcium oxide, explaining the material's weight loss during calcination. The conversion of aragonite to calcite occurs between 500°C and 700°C, while optimal decomposition into CaO is achieved at 1000°C. X-ray fluorescence (XRF) analysis indicated reduced impurities in the samples post-calcination. Scanning electron microscopy (SEM) detailed the morphological characteristics of the shell powders, highlighting temperature-dependent surface features. In conclusion, the optimal calcination temperature for extracting calcium from SST shells is 1000°C. The resulting calcium oxide can be a valuable precursor for various material applications. This research contributes to the efficient utilization of biowaste resources, emphasizing the potential of freshwater snail shells in the sustainable production of calcium-derived materials.

Effect of Growth and Calcination Temperatures on the Optical Properties of Ruthenium-Doped ZnO Nanoparticles

This study aimed to probe the effect of heat treatment on zinc oxide nanoparticles doped with ruthenium through a chemical co-preparation technique. Pure ZnO and Ru-doped ZnO nanoparticles, with the general formula Zn1−x−RuxO, were synthesized for 0 ≤ x ≤ 0.04. Using the same starting precursors, the growth temperature was 60 °C and 80 °C for set A and set B, respectively, whereas the calcination temperature was 450 °C and 550 °C for set A and set B, respectively. For the structure investigation, X-ray powder diffraction (XRD) revealed that the crystallite size of set A was smaller than that of set B. For x = 0.04 in set B, the maximum value of the crystallite size was attributed to the integration of Ru3+ ions into interstitial sites in the host causing this expansion. Fourier transform infrared spectroscopy (FTIR) confirmed the formation of zinc oxide nanoparticles by showing a Zn-O bonding peak at 421 cm−1. For x = 0.04 in set B, the divergence confirmed the change in bonding properties of Zn2+ distributed by Ru3+ doping, which verifies the presence of secondary-phase RuO2. Using UV–visible spectroscopy, the energy gap of set A swings as ruthenium doping increases. However, in set B, as the crystallite size decreases, the energy gap increases until reversing at the highest concentration of x = 0.04. The transition from oxygen vacancy to interstitial oxygen, which is associated with the blue peak (469 nm), increases in set A under low heating conditions and decreases in set B as Ru doping increases, as revealed in the photoluminescence optical spectra of the samples. Therefore, ruthenium doping proves a useful surface defect and generates distortion centers in the lattice, leading to more adsorption and a remarkable advantage in sunscreen and paint products used for UV protection.

Effects of Calcination Temperature and Rare Earth Substituting on the Crystal Structure and Magnetic Properties of Sr0.95Re0.05Fe12O19 (Re = La, Pr, Nd, Dy, Yb) M-type Hexaferrites

Effects of Calcination Temperature and Rare Earth Substituting on the Crystal Structure and Magnetic Properties of Sr0.95Re0.05Fe12O19 (Re = La, Pr, Nd, Dy, Yb) M-type Hexaferrites

Effect of calcination temperature on the synthesis of TiO2 nanoparticles from Sutherlandia frutescence for the degradation of Congo red dye and antibiotics ciproflaxin and sulfamethoxazole

Considering that pollutants such as dyes and pharmaceuticals are mutagenic and carcinogenic, they provide a major risk to aquatic life and humans, thereby making their removal to be crucial. The current study is focused on synthesizing TiO2 nanoparticles through the utilization of an aqueous extract from Sutherlandia frutescens. FTIR, XRD, SEM, UV–Vis and EDS techniques were employed for the analysis of the attributes of TiO2 nanoparticles. In accordance with FT-IR analysis, The S frutescens plant's unique functional groups were found to be deposited on the TiO2 nanoparticles which were synthesized. At wavelengths of 352 nm and 370 nm, substantial absorption peaks were seen in UV–Vis confirming the TiO2 formation and the bandgaps were calculated and found to be 3,19 eV, 3.26 eV and 3.29 eV for 400 °C, 450 °C and 500 °C respectively. XRD further confirmed, with the anatase peak of the TiO2 synthesis with a 10.17 average crystallite size. SEM showed the materials were spherical in shape, irregular and unevenly distributed on the surface. The synthesized nanoparticles were subjected to assessment for their photocatalytic performance while exposed to the dye Congo red (CR) and the antibiotics sulfamethoxazole (SMX) and ciprofloxacin (CIP). The highest degradation was reported for the TiO2 NPs @ 400 °C at the optimum dosage of 30 mg to be 87 % against 5 ppm CR dye after 120 mins. Upon reusing this material, its efficiency was reduced to 64 % after the first cycle followed by 61 % then 36 % for the second and third cycle respectively. Moreover, Electrons were the entities accountable for the deterioration of the dyes. Testing against the 10 ppm antibiotics, SMX and CIP had degradations of 82 and 94.6 %, respectively, after an exposure of UV (300 W) light for a period of 120 min. This investigation shows that these environmentally friendly materials can be utilized to degrade a variety of contaminants.

Boron-doped biochar-nano loaded zero-valent iron to activate persulfate for the degradation of oxytetracycline

Oxytetracycline has posed a serious environmental nuisance, and seeking environmental decontamination materials is the priority task to deal with antibiotic water contamination. Herein, boron-doped biochar loaded nano zero-valent iron composites (nZVI/BBC) were fabricated as activators of PDS for oxidative degradation of oxytetracycline hydrochloride (OTC), and the main removal mechanism was explored in detail. The results showed that Boron-doped biochar with borate ester structure (BC2O) and degree of defects are the main active sites for improving PDS activation properties. BBC could effectively prevent nZVI agglomeration and reduce nZVI passivation. The effects of calcination temperature of BBC, loading ratio and dosage of nZVI/BBC, PDS concentration, initial solution pH, pollutant concentration, and interfering ions on OTC removal by nZVI/BBC were also systematically investigated, and the optimal reaction conditions were screened: 10 wt% loading of nZVI in the composite, 1 g/L dosage of nZVI/BBC, 1 mM dosage of PDS and solution pH= 5. The cycling test showed that the removal rate of OTC by nZVI/BBC decreased from 95.3% to 70.2% after five cycles, indicating that there is excellent stability of this material. Among them, the catalyst of 10%nZVI/BBC displayed the optimal PDS activation performance, owing to the synergistic adsorption-double oxidation system, BBC as well as nZVI. The free radical quenching experiment and free radical trapping experiment proved that the degradation of OTC mainly followed the free radical pathway and SO4•− and •OH were the primary active species in the catalytic system. This study provides a practical reference for the treatment of actual antibiotic wastewater.

Ni alumina-based catalyst for sorption enhanced reforming - Effect of calcination temperature

Effect of calcination temperature (350 °C – 850 °C) on the physicochemical properties as well as catalytic performance of Ni-based catalyst for the hydrogen production via steam methane reforming (SMR) and sorption enhanced reforming (SER) has been investigated. Catalyst calcined at highest temperature (850 °C) shows formation of NiAl2O4 confirmed by XRD. Consequently, a much higher reduction temperature (875 °C) is required to reduce this Ni aluminate spinel to an active Ni catalyst. Catalyst calcined at highest temperature (850 °C) showed much higher CH4 conversion and H2 production in SMR compared to the catalysts calcined at lower temperatures. In addition, higher CH4 conversion and H2 production was observed for the 15%Ni/alumina_850 catalyst after aging (long exposure to steam and high temperature) compared to commercial reforming catalyst. Finally, a much better stability is observed for the 15%Ni/alumina_850 catalyst compared to the commercial reforming catalyst after 100 SER/regeneration cycles under relevant reaction conditions. The formation of NiAl2O4 during high temperature calcination plays a vital role in the robustness and stability of the Ni-based catalysts and can be useful synthesis procedure for increasing the catalyst lifetime.

Synthesis of Fe-Al catalysts to boost CNTs formation from polymer wastes via the improved two-stage system

Carbon nanotubes (CNTs) has been considering as a high-value product from polymer wastes via the coupled thermal-catalytic technology, and how to improve the yield and quality of CNTs is the key to the further industrialization. Herein, a series of Fe-Al catalysts with different Fe-loading and calcination temperature were prepared and expected to boost CNTs formation from low-density polyethylene (LDPE) in the improved two-stage reaction system. The fresh and spent Fe-Al catalysts were characterized in detail by SEM-EDX, XRD, N2 physisorption, NH3-TPD, H2-TPR, TG-DSC, Raman, and TEM to explore the effects of Fe-loading (5–20%) and calcination temperature (450–650 °C) on the physicochemical properties of Fe-Al catalysts as well as the quantity and quality of CNTs. An increase of Fe-loading generated more active sites for CNTs growth while intensified the competition for the carbon source, promoting the yield while reducing the length of CNTs. A decrease of calcination temperature reduced the interaction between Fe sites and Al2O3 support, promoting both the yield and the length of CNTs. This work provided a promising strategy for optimizing Fe-Al catalysts to boost CNTs production from polymer wastes.

Construction of Co/Mn-based nanowires with adjustable surface state for boosting lean methane catalytic oxidation

In this paper, CoMn based nanowires were in-situ grown on foam nickel by hydrothermal method combined with calcination treatment, and a monolithic methane oxidation catalyst was obtained. The effects of hydrothermal temperature and calcination temperature on the crystal structure, micro morphology and catalytic performance of the catalysts were systematically studied. The results indicated that when the hydrothermal temperature was 160 °C and the calcination temperature was 350 °C, Mn doped Co3O4 nanowires with uniform morphology can be obtained, accompanied by the appearance of CoMn2O4. The introduction of Mn ions caused lattice distortion of Co3O4, achieving the regulation of adsorbed oxygen and lattice oxygen. The monolithic MnCoO/NF–H-160 °C catalyst showed the best catalytic activity (T90 = 414 °C) for lean methane catalytic oxidation, which even surpassed the noble metal based catalyst. Its excellent catalytic activity was due to the fact that the catalyst can expose more active sites, rich active oxygen and good mass transfer characteristics. This study provides a new approach for designing efficient monolithic catalysts and has significant potential for application and development in the field of organic waste gas treatment.

Efek Penambahan Diethanolamine dan Suhu Kalsinasi terhadap Energi Gap Lapisan Tipis CuSnO3

This study focuses on the synthesis of CuSnO3 thin films using the sol-gel dip coating method, with a particular emphasis on the effects of diethanolamine (DEA) addition and calcination temperature on the bandgap energy. The successful addition of DEA significantly influenced the reduction of the bandgap energy of CuSnO3 thin films, decreasing from 3.21 eV (without DEA) to 2.11 eV (optimal DEA addition, 1.5 mL), as characterized by UV-DRS. Furthermore, different calcination temperatures yielded varying bandgap energies, with the lowest bandgap energy observed in samples calcined at 550°C. This research provides valuable insights into the manipulation of CuSnO3 thin film properties for potential applications in optoelectronic devices and other emerging technologies.

Effect of Calcination Temperature on the Stability of the Perovskite Materials – Study of Structural and Morphological Properties

Effect of Calcination Temperature on the Stability of the Perovskite Materials – Study of Structural and Morphological Properties

Effect of calcination temperature and duration on structural and dielectric properties of CaFeO3-δ

With its perovskite structure, CaFeO3-δ exhibits intriguing properties. It possesses remarkable dielectric properties that make it an attractive candidate for various technological applications such as capacitors, enhanced signal transmission, and other electronic components. The primary objective of this study is to optimize the dielectric properties of CaFeO3-δ perovskite material. For this purpose, an ideal combination of the duration and temperature of calcination was studied. The calcination conditions were variated, from 600 °C to 1100 °C for the temperature at different durations (4 h and 10 h). The XRD results were refined using the Rietveld refinement, showing a simple orthorhombic crystallographic structure. This structure was found for samples calcined at 900 °C, 1000 °C, and 1100 °C during 4 h and 10 h, according to the observed and calculated patterns (Rp ≤ 5 % - Rwp ≤ 7 %) of these ceramics. The sample calcinated at 1000 °C/4h has the closest χ2 factor to 1 which indicates an optimum crystallinity. the crystallite size goes from 70.8245 nm to 99.1266 nm with the increase of the calcination temperature and duration, this parameter was calculated using the XRD peak broadening analysis and the Scherrer equation. SEM analysis revealed, that high temperature and calcination time led to a larger grain size. Notably, samples calcined at 1100 °C/10 h had a larger particle size of 1.312 μm, confirming the crystallite size evolution determined by XRD. FT-IR and Raman analyses further confirmed the samples purity. Dielectric studies showed that the colossal dielectric constant (ε') reached a maximum of 105 for CaFeO3-δ calcined at 1000 °C for both durations. The lower transition temperature was found for the sample calcined at 1000 °C/10 h with a value of 257 °C. The maximum conductivity of 0.22 S/m at 1 MHz was recorded for the CaFeO3-δ calcined at 1000 °C/10 h. Furthermore, the dielectric constant exhibits relaxational behavior, which can be attributed to the strong correlation between the ferrite conduction mechanism and their dielectric behavior. The dielectric material does not follow the ideal Debye theory, according to Cole-Cole analysis, indicating a distribution of relaxation times instead. These obtained properties make this ceramic (CaFeO3-δ calcined at 1000 °C/10 h) a potential candidate for dielectric and electrical device applications such as batterie and electric capacitors.