Preparation of BaAl2O4 by microwave sintering

Zhang, Nianbing; Bai, Chenguang; Ma, Mang-yuan; Li, Zhiying

doi:10.1016/s1003-6326(09)60411-8

Cited by 11 publications

(5 citation statements)

References 6 publications

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“…Above XRD and SEM analyses suggest that Al-Ti-B-C master alloy containing TiC and TiB 2 particles can be successfully produced through reaction between Ti and B 4 C in Al melt. According to previous studies of Al-B 4 C [8,9] and Al-Ti [10,11] systems, possible chemical reactions occur in the present Al-Ti-B 4 C system as follows: Ti(s) + 3Al(l) = TiAl 3 (s).…”

Section: Resultsmentioning

confidence: 69%

“…We have concluded that Al-Ti-C and Al-Ti-B master alloys share some common rules in refining Al [7], which can be further confirmed in the present work. In the Al melt with the addition of Al-Ti-B or Al-Ti-C mastera alloys, surplus Ti atoms as solute have been observed to segregate to TiB 2 or TiC particles [11][12][13]7]. It is possible that an especially thin layer of TiAl 3 phase forms at surfaces of TiB 2 or TiC particles due to the segregation of Ti, then this phase acts as substrates for the nucleation of α-Al [12][13].…”

Section: Resultsmentioning

confidence: 99%

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Preparation of Al-Ti-B-C Master Alloy and its Grain Refinement Effect for Pure Al

Wang

Yang

et al. 2012

AMR

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In this paper, we successfully produced Al-Ti-B-C master alloys through adding mixtures of Ti and B4C powders into Al melt. XRD and SEM examinations suggest that only fine TiB2 and TiC particles are formed in the matrix of Al-Ti-B-C master alloy when the Ti/B4C molar ratio is 3/1, while an additional TiAl3 phase is present when the Ti/B4C molar ratio exceeds 3/1. The produced Al-Ti-B-C master alloys exhibited high grain refinement effect for pure Al. It was found that the presence of TiAl3 phase in the matrix of Al-Ti-B-C master alloy enhanced the grain refinement efficiency and the mechanism was discussed.

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Section: Resultsmentioning

confidence: 69%

Section: Resultsmentioning

confidence: 99%

Preparation of Al-Ti-B-C Master Alloy and its Grain Refinement Effect for Pure Al

Wang

Yang

et al. 2012

AMR

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“…BaAl 2 O 4 phosphors have also been synthesized by microwave heating. Zhang et al successfully synthesized BaAl 2 O 4 using BaCO 3 and Al(OH) 3 powders as raw materials via microwave sintering [100]. These phosphors were characterized by thermogravimetrydifferential scanning calorimetry (TG-DSC), X-ray diffraction (XRD), and optical microscopy; this method was found to be feasible for the preparation of persistent luminescence materials of barium aluminates.…”

Section: Synthesis Of Barium Aluminate Phosphorsmentioning

confidence: 99%

Recent Developments in Lanthanide-Doped Alkaline Earth Aluminate Phosphors with Enhanced and Long-Persistent Luminescence

Kim

2021

Nanomaterials

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Lanthanide-activated alkaline earth aluminate phosphors are excellent luminescent materials that are designed to overcome the limitations of conventional sulfide-based phosphors. The increasing research attention on these phosphors over the past decade has led to a drastic improvement in their phosphorescence efficiencies and resulted in a wide variety of phosphorescence colors, which can facilitate applications in various areas. This review article discusses the development of lanthanide-activated alkaline earth aluminate phosphors with a focus on the various synthesis methods, persistent luminescence mechanisms, activator and coactivator effects, and the effects of compositions. Particular attention has been devoted to alkaline earth aluminate phosphors that are extensively used, such as strontium-, calcium-, and barium-based aluminates. The role of lanthanide ions as activators and coactivators in phosphorescence emissions was also emphasized. Finally, we address recent techniques involving nanomaterial engineering that have also produced lanthanide-activated alkaline earth aluminate phosphors with long-persistent luminescence.

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“…At the same time voltage changing the power changes of the maximum power point on both sides is very different. So in order to realize the MPPT, we must use different duty ratio d ∆ [3]. Progress in Renewable and Sustainable Energy So a novel asymmetric fuzzy PI control method is introduced for MPPT of photovoltaic system, the maximum power point on both sides adopt the different controlling strategy and membership functions to eliminate the power oscillation.…”

Section: The Principle Of Asymmetric Fuzzy-pi Controlmentioning

confidence: 99%

The Simulation Research of Maximum Power Point Tracking Based on Asymmetric Fuzzy-PI Control for Photovoltaic Grid-Connected System

Yang

Zeng

2012

AMR

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According to the characteristics of photovoltaic array, a novel asymmetric fuzzy PI control method is introduced for MPPT of photovoltaic system. Photovoltaic energy generation system can track the maximum power of PV cell rapidly by using asymmetric fuzzy control. On the base of asymmetric fuzzy control, an added PI control is used to eliminate the power oscillation around maximum power point. Simulation results have verified the good performance of the proposed method

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Preparation of BaAl2O4 by microwave sintering

Cited by 11 publications

References 6 publications

Preparation of Al-Ti-B-C Master Alloy and its Grain Refinement Effect for Pure Al

Preparation of Al-Ti-B-C Master Alloy and its Grain Refinement Effect for Pure Al

Recent Developments in Lanthanide-Doped Alkaline Earth Aluminate Phosphors with Enhanced and Long-Persistent Luminescence

The Simulation Research of Maximum Power Point Tracking Based on Asymmetric Fuzzy-PI Control for Photovoltaic Grid-Connected System

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