Morphology and magnetic properties of barium hexaferrite ceramics synthesized in xwt% NaCl-(100−x) wt% KCL molten salts

Aydoğan, Eda; Kaya, Seray; Dericioğlu, Arcan F.

doi:10.1016/j.ceramint.2013.08.002

Cited by 19 publications

(3 citation statements)

References 17 publications

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“…Each system demonstrates a different behavior, so it is important to precisely determine the heat treatment and the kind and the amount of salt required. Chlorides and sulfates are typically used in many applications. − Due to their low melting point, nitrate salts are also studied, but synthesis reactions behave differently compared to chloride or sulfate systems . Concerning the amount of salt to be used, it is usually between 80% and 120% of the weight of the reactant mixture, or using the molar ratio of the salt/complex oxide (S/O), S/O = 1:1, 3:1, 4:1, 5:1, or 20:1, depending on the nature of the product and the salt …”

Section: Introductionmentioning

confidence: 99%

Original Synthetic Route To Obtain a SrAl₂O₄ Phosphor by the Molten Salt Method: Insights into the Reaction Mechanism and Enhancement of the Persistent Luminescence

et al. 2015

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SrAl2O4:Eu(2+), Dy(3+) has been extensively studied for industrial applications in the luminescent materials field, because of its excellent persistent luminescence properties and chemical stability. Traditionally, this strontium aluminate material is synthesized in bulk form and/or fine powder by the classic solid-state method. Here, we report an original synthetic route, a molten salt assisted process, to obtain highly crystalline SrAl2O4 powder with nanometer-scale crystals. The main advantages of salt addition are the increase of the reaction rate and the significant reduction of the synthesis temperature because of much higher mobility of reactants in the liquid medium than in the solid-state method. In particular, the formation mechanism of SrAl2O4, the role of the salt, and the phase's evolution have been explored as a function of temperature and time. Phosphorescent powders based on SrAl2O4:Eu(2+), Dy(3+) with high crystallinity are obtained after 1 h treatment at 900 °C. This work could promote further interest in adopting the molten salt strategy to process high-crystallinity materials with enhanced luminescence to design technologically relevant phosphors.

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Section: Introductionmentioning

confidence: 99%

Original Synthetic Route To Obtain a SrAl₂O₄ Phosphor by the Molten Salt Method: Insights into the Reaction Mechanism and Enhancement of the Persistent Luminescence

et al. 2015

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“…XRD results indicate that two reactions of forming barium cerate and barium zirconate are going on simultaneously. The solubility of barium oxide and barium carbonate in the salt is high, 27 cerium oxide has been also reported to dissolve as CeOCl, 28 while the solubility of ZrO 2 is very low. 18 This may explain why the powder formed consists of at least two phases.…”

Section: Barium Cerate-zirconate Solid Solutionmentioning

confidence: 98%

Proton Conducting Ceramic Powder Synthesis by a Low Temperature Method

Gazda¹,

Mielewczyk‐Gryń²,

Gdula-Kasica³

et al. 2015

j nanosci nanotechnol

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Molten salt synthesis (MSS) is a simple method for the preparation of ceramic powders with specific morphology. The main role of the molten salts is to increase the reaction rate and lower the reaction temperature. It occurs because of much higher mobility of reactants in the liquid medium than in the solid state. In this work the molten salt synthesis was applied to produce ceramic powders of La0.995Ca0.005NbO4 and BaCe(0.9-x)Zr(x)Y0.1O3. Single-phase lanthanum niobate formed in all studied conditions of the synthesis, whereas in the case of barium cerate-zirconate MSS led to forming two crystalline phases: barium cerate and barium zirconate. The heating temperature and time as well as the salt content most strongly influenced the shape and size of particles. The influence of other parameters on the powder morphology was weaker. Despite differences in size and morphology, all groups of the La0.995Ca0.005NbO4 powder obtained with the MSS method pressed into pellets and sintered gave a dense ceramic material. On the other hand in the case of barium cerate-zirconate regardless of synthesis and sintering conditions the ceramics were porous.

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“…La incorporación de NaCl como fundente favorece los procesos de formación y cristalización de compuestos a menores temperaturas que en un proceso de síntesis convencional en sistemas de (Y (1-x) Eu x ) 4 Al 2 O 9 [174], hexa-aluminato de calcio [174] y genera microcristales por un mecanismo topoquímico en sistemas como el NaNbO 3 [174]. [181]. Además promueve la reacción en la síntesis de polvos de titanato zirconato de plomo (PZT) [182] y LaMnO 3 [177].…”

Section: Selección De La Sal Fundenteunclassified

Diseño y síntesis de materiales nanoestructurados basados en aluminatos de estroncio con propiedades fotoluminiscentes

Hernández¹

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Morphology and magnetic properties of barium hexaferrite ceramics synthesized in xwt% NaCl-(100−x) wt% KCL molten salts

Cited by 19 publications

References 17 publications

Original Synthetic Route To Obtain a SrAl₂O₄ Phosphor by the Molten Salt Method: Insights into the Reaction Mechanism and Enhancement of the Persistent Luminescence

Original Synthetic Route To Obtain a SrAl₂O₄ Phosphor by the Molten Salt Method: Insights into the Reaction Mechanism and Enhancement of the Persistent Luminescence

Proton Conducting Ceramic Powder Synthesis by a Low Temperature Method

Diseño y síntesis de materiales nanoestructurados basados en aluminatos de estroncio con propiedades fotoluminiscentes

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Morphology and magnetic properties of barium hexaferrite ceramics synthesized in xwt% NaCl-(100−x) wt% KCL molten salts

Cited by 19 publications

References 17 publications

Original Synthetic Route To Obtain a SrAl2O4 Phosphor by the Molten Salt Method: Insights into the Reaction Mechanism and Enhancement of the Persistent Luminescence

Original Synthetic Route To Obtain a SrAl2O4 Phosphor by the Molten Salt Method: Insights into the Reaction Mechanism and Enhancement of the Persistent Luminescence

Proton Conducting Ceramic Powder Synthesis by a Low Temperature Method

Diseño y síntesis de materiales nanoestructurados basados en aluminatos de estroncio con propiedades fotoluminiscentes

Contact Info

Product

Resources

About

Original Synthetic Route To Obtain a SrAl₂O₄ Phosphor by the Molten Salt Method: Insights into the Reaction Mechanism and Enhancement of the Persistent Luminescence

Original Synthetic Route To Obtain a SrAl₂O₄ Phosphor by the Molten Salt Method: Insights into the Reaction Mechanism and Enhancement of the Persistent Luminescence