Grinding methods effects on the synthesis of Potassium-Sodium Niobate powders by oxide mixing

Quintero, María C.; Rincón, Miryam; Osório-Guillén, J. M.; López, Diana; Badillo, Fernando Andrés Londoño

doi:10.22430/22565337.1269

Cited by 4 publications

(3 citation statements)

References 21 publications

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“…The higher intensity of the C2 peaks as compared to C1 peaks indicated the higher crystallinity of the doublecalcined powders. Based on the results, both C1 and C2 showed the presence of KNN, however, C1 showed the incomplete KNN phase formation which represented by NaNb3O8 which is in agreement with the previous reported article [11]. While when subjected to double calcination (C2 sample), the peak at the particular position has been transformed to KNN phase with a stoichiometric ratio of K0.4 Na0.6NbO3.…”

Section: Structural Analysis (A) Single and Double Calcinationsupporting

confidence: 90%

Influence of Double Calcination-Milling Route on the Structural and Microstructural Properties of Lead-Free K0.5NA0.5NBO3 (Knn) Ceramics

et al. 2023

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Potassium sodium niobate (KNN) has always been one of the most potential candidates to replace lead-based piezoelectric ceramics due to its strong piezoelectric properties and environmentally friendly composition. A strong piezoelectric property is constantly influenced by the sample's densification as well as its microstructural characteristics. One of the current main issues with this KNN lead-free piezoelectric material is the difficulty in creating high-density samples by conventional preparation and sintering. Thus, KNN lead-free ceramics were synthesised using an improved solid-state method by introducing the double calcination-milling route to this process. The outcome demonstrates that, despite the presence of additional KNN secondary phases, the double calcination-milling approach contributed to the early creation of the KNN phase. When sintered pellets are subjected to a double calcination milling process, the XRD pattern revealed that the main peaks of the sample are indexed to orthorhombic K0.5Na0.5NbO3. The double calcination KNN pellet have a relative density of 90% densification which is slightly higher than that of single calcination KNN pellet which shows 88% densification.

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Section: Structural Analysis (A) Single and Double Calcinationsupporting

confidence: 90%

Influence of Double Calcination-Milling Route on the Structural and Microstructural Properties of Lead-Free K0.5NA0.5NBO3 (Knn) Ceramics

et al. 2023

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“…From room temperature to 1000°C concerning weight loss, four regions can be clearly distinguished in the temperature range. The first one is a 6.3% weight loss that is attributed to water evaporation which is easily absorbed in a normal atmosphere where the manipulation of the precursor takes place in the synthesis process [13].…”

Section: Resultsmentioning

confidence: 99%

Bismuth ferrite-barium titanate system studies around morphotropic phase boundary

Amaya

Pérez

Colorado

et al. 2023

J. Phys.: Conf. Ser.

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Nowadays, the electro-electronic industry and scientific community have a great interest in improving memory devices. A candidate is the bismuth ferrite owing to the coexistence of ferroelectricity and anti-ferromagnetism at room temperature, however, a high leakage current harms their ferroelectric properties. Thus, bismuth ferrite and barium titanate solutions improve the ferroelectric properties of bismuth ferrite and optimize the magnetoelectric coupling factor. This system is called multiferroic, materials exhibit the coexistence of ferromagnetic, ferroelectric, or ferro-elastic orders, which is of interest to the scientific physics community and electronic industry. In this paper, bismuth ferrite-barium titanate system around the morphotropic phase boundary was studied and analyzed. It was observed changes in the structural properties in function of barium titanate content. Calcination temperature was determined from thermogravimetric analysis curves to powders of bismuth ferrite-barium titanate system. Ceramic bodies were densified conventionally. Archimedes’ method was used for density measure. Ceramics with densities greater than 95% were obtained. 93% of the perovskite phase was obtained from structural results. Finally, structural properties were presented and analyzed using Mossbauer spectroscopy as complementary technique. These analyses are very important in solid state physics because to contribute to understanding the phenomenology and synthesis process of multiferroic materials.

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“…The milling process was carried out in a Fritsch Pulverisette planetary mill using a polyvinylchloride (PVC) container, with ZrO2 cylinders of 5 mm for 24 h in a mixture of water and isopropyl alcohol (3:1) as a medium, the resultant slurry was dried to 100 °C for 24 h and crushed in an agate mortar. Similar to process reported by Quintero et al [12]. The powders were calcined at 950 °C for 3h, in an alumina crucible thermogravimetric (TGA), and differential thermal analysis (DTA) was carried out on KNN-Fe samples before the calcination step using TA Instruments.…”

Section: Methodology and Materialsmentioning

confidence: 99%

Structure and microstructure behavior of iron doped potassium sodium niobate powders

Amaya-Zabala

Echavarría-Isaza

Tobón

et al. 2022

J. Phys.: Conf. Ser.

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In this paper, the synthesis and characterization of the potassium sodium niobate doped with iron powders have been studied. Solid-state oxide reaction sintering was used. The powders produced in this work exhibit no homogeneous microstructure, which introduced the growth of random cylindrical structures and will can contribute to the increased porosity ceramics. It was observed average particle size of 3μm, besides, also it was observed the formation of agglomerations and an increase in the size of these clusters with the increase in the amount of iron. The calcination temperature was 950 °C. This is slightly higher than other potassium sodium niobate powders systems. In addition to the physical and microstructural properties, structural properties are presented and analyzed for the first-time using Mössbauer spectroscopy as complementary technique in Fe 3+doped potassium sodium niobate powders. This work is important to state solid physics because establishes the influence of iron in the potassium sodium niobate system, and so the future obtaining of multifunctional materials that have piezoelectric and magnetic properties.

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Grinding methods effects on the synthesis of Potassium-Sodium Niobate powders by oxide mixing

Cited by 4 publications

References 21 publications

Influence of Double Calcination-Milling Route on the Structural and Microstructural Properties of Lead-Free K0.5NA0.5NBO3 (Knn) Ceramics

Influence of Double Calcination-Milling Route on the Structural and Microstructural Properties of Lead-Free K0.5NA0.5NBO3 (Knn) Ceramics

Bismuth ferrite-barium titanate system studies around morphotropic phase boundary

Structure and microstructure behavior of iron doped potassium sodium niobate powders

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