Microstructure and electrical properties of potassium strontium niobate (KSr2Nb5O15) ceramics

Liu, Liangliang; Gao, Feng; Hu, Guoxin; Liu, Jiangnan; Li, Jinjin

doi:10.1016/j.jallcom.2013.05.093

Cited by 28 publications

(17 citation statements)

References 48 publications

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“…21 In this method the raw materials are mixed together with a salt; then the mixture is heat treated to a temperature higher than the melting point of the salt. 22 The molten salt fluxes have been employed to enhance the reactivity and promote crystal growth in systems such as complex oxides powders: BaZrO 3 , 23 KSrNb 5 O 15 , 24 ZnAl 2 O 4 . 25 The molten salt process has similarities to single crystal prepared by the seeded method but extended to particle synthesis.…”

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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“…As shown in Figures 5(a) and 5(b), ε m and T c are greatly dependent on x. T c shifts to higher temperatures from 246 °C to 304 °C with increasing x from 0.0 to 0.6, showing that K + introduction are beneficial to improve T c in CBN ceramics. The increase in T c can be attributed to (i) the microstructure evolution of the CBN ceramics and (ii) the enhanced structural distortion [27].…”

Section: Resultsmentioning

confidence: 99%

Structural modulation and electrical properties in ferroelectric niobates (Ca0.28Ba0.72)2.5−0.5K Nb5O15 (0.0≤x≤0.6) ceramics

Yang

Wei

et al. 2015

Ceramics International

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“…Obviously, the speedy development of KSr 2 Nb 5 O 15 ceramics benefits from the facile preparation of needlelike KSr 2 Nb 5 O 15 particles with required size [126,127]. The majority of tungsten-bronze structured compositions show an innate ability to form anisometric grains and undergo anisotropic grain growth due to possessing relatively low symmetry.…”

Section: Textured Ksr 2 Nb 5 O 15 Ceramicsmentioning

confidence: 99%

Progress on the fabrication of lead-free textured piezoelectric ceramics: perspectives over 25 years

Liu

2015

J Mater Sci: Mater Electron

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Further enhancement of the piezoelectric response in lead-free piezoelectric ceramics can be accomplished by inducing preferred orientation. In this paper, attempts have been made to review the progress on the fabrication of lead-free textured piezoelectric ceramics by the (reaction) templated grain growth method. The preparation (molten salt synthesis) and alignment (tape casting and extrusion molding) of anisometric template particles were introduced in detail. The texture evolution with heating was visualized by computer simulation. The review of lead-free textured piezoelectric ceramics focused on four promising systems: Na 0.5 Bi 0.5 TiO 3 -based, K 0.5 Na 0.5 NbO 3 -based, Ba(Zr 0.2 Ti 0.8 )O 3 -(Ba 0.7 Ca 0.3 )TiO 3 and KSr 2 Nb 5 O 15 . It is suggested that texturing of lead-free morphotropic phase boundary compositions will be required in order to realize viable lead-free alternatives to current lead-based materials.

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Microstructure and electrical properties of potassium strontium niobate (KSr2Nb5O15) ceramics

Cited by 28 publications

References 48 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

Structural modulation and electrical properties in ferroelectric niobates (Ca0.28Ba0.72)2.5−0.5K Nb5O15 (0.0≤x≤0.6) ceramics

Progress on the fabrication of lead-free textured piezoelectric ceramics: perspectives over 25 years

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Microstructure and electrical properties of potassium strontium niobate (KSr2Nb5O15) ceramics

Cited by 28 publications

References 48 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

Structural modulation and electrical properties in ferroelectric niobates (Ca0.28Ba0.72)2.5−0.5K Nb5O15 (0.0≤x≤0.6) ceramics

Progress on the fabrication of lead-free textured piezoelectric ceramics: perspectives over 25 years

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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