Low-temperature synthesis of micro/nano Lithium Fluoride added magnesium aluminate spinel

Malekabadi, M. Azizi; Sarraf-Mamoory, Rasoul

doi:10.1016/j.ceramint.2018.07.305

Cited by 11 publications

(4 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The MgAl2O4 shows the fine particles with spherical structure, and some particles exhibited the worm-like shapes Fig. 4(a-b) [38]. The two different morphologies of the MgAl2O4 offers a comprehensive and uniform distribution of Ni over the surface depicted in Fig.…”

Section: Fig 3 Xrd Pattern Of Synthesized Mgal2o4 and Ni/mgal2o4mentioning

confidence: 93%

Hydrogen Production from Methane Cracking in Dielectric Barrier Discharge Catalytic Plasma Reactor using a Nanocatalyst

Khoja¹,

Azad²,

Saleem³

et al. 2020

Preprint

View full text Add to dashboard Cite

The study experimentally investigated a novel approach for producing hydrogen from methane cracking in dielectric barrier discharge catalytic plasma reactor using a nanocatalyst. Plasma-catalytic methane (CH4) cracking was undertaken in a dielectric barrier discharge (DBD) catalytic plasma reactor using Ni/MgAl2O4. The Ni/MgAl2O4 was synthesised through co-precipitation followed customised hydrothermal method. The physicochemical properties of the catalyst were examined using X-ray diffraction (XRD), scanning electron microscopy - energy dispersive X-ray spectrometry (SEM-EDX) and thermogravimetric analysis (TGA). The Ni/MgAl2O4 shows a porous structure spinel MgAl2O4 and thermal stability. In the catalytic-plasma methane cracking, the Ni/MgAl2O4 shows 80% of the maximum conversion of CH4 with H2 selectivity 75%. Furthermore, the stability of the catalyst was encouraging 16 hours with CH4 conversion above 75%, and the selectivity of H2 was above 70%. This is attributed to the synergistic effect of the catalyst and plasma. The plasma-catalytic CH4 cracking is a promising technology for the simultaneous H2 and carbon nanotubes (CNTs) production for energy storage applications.

show abstract

Section: Fig 3 Xrd Pattern Of Synthesized Mgal2o4 and Ni/mgal2o4mentioning

confidence: 93%

Hydrogen Production from Methane Cracking in Dielectric Barrier Discharge Catalytic Plasma Reactor using a Nanocatalyst

Khoja¹,

Azad²,

Saleem³

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…A Philips X'PERT MPD X-ray diffractometer with CuKα radiation (λCuK α1 = 0.154 nm, incident angle =0.03°) was used to characterize the coated sample. [33][34][35] The corrosion properties of the coated samples were studied by the immersion test (open circle potential, OCP), electrochemical impedance spectrometry (EIS), and potentiodynamic polarization (PDP). The immersion test was carried out by immersing the coated samples in the corrosive solution and registering the OCP values for 1 h. Also, PDP and EIS tests were carried out using the EG&G potentiostat-galvanostat set-up (the 273A model).…”

Section: Methodsmentioning

confidence: 99%

“…The microstructure of the coatings cross‐section was investigated by a field emission scanning electron microscopy (FESEM, Mira 3‐XMU) and energy dispersive X‐ray spectroscopy (EDS). A Philips X'PERT MPD X‐ray diffractometer with CuK α radiation ( λ CuK α1 = 0.154 nm, incident angle =0.03°) was used to characterize the coated sample 33‐35 . The corrosion properties of the coated samples were studied by the immersion test (open circle potential, OCP), electrochemical impedance spectrometry (EIS), and potentiodynamic polarization (PDP).…”

Section: Methodsmentioning

confidence: 99%

Enhancement of the Ti‐6Al‐4V alloy corrosion resistance by applying CrN/CrAlN multilayer coating via Arc‐PVD method

Azizi-Malekabadi

Bakhshi

Shahbazi

et al. 2021

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

The use of physical vapor deposition (PVD) for hard coatings, especially Al 2 O 3 , TiN, and CrN coatings, has been considered as an ideal method in the coating. Among hard compounds, TiN, due to high hardness, high chemical and physical stability, and low electrical resistance, has been utilized as a popular coating in the industries in the recent decades. [1][2][3] The significant decrease in the TiN coating hardness, its low resistance to oxidation at temperatures higher than 500°C (work temperature restriction), and its low corrosion resistance to corrosive environments are, however, among the most important disadvantages of this coating. 4,5 CrN coating has been introduced as an appropriate substitute for TiN. This is because of the higher fracture toughness, more corrosion resistance and also a lower friction coefficient for the CrN coatings, as compared to TiN coatings. One of the most noteworthy disadvantages of CrN coatings is their low hardness. Many studies have been carried out to improve the CrN hardness. 4,6 In this regard, multicomponent and multilayer coatings have been studied; by producing CrAlN, TiCN, TiAlN, and TiCrAlN new coatings, a significant step has been taken toward the development of hard and corrosion-resistant coatings. 7-10 Addition of aluminum to transition metal nitrides has led to a new group of hard coatings improving oxidation and corrosion behavior, thermal stability, and their hardness. [11][12][13][14][15][16] Triple nitride coatings on the Cr base can prevent oxygen diffusion into the coating by forming dense protective oxides like Cr 2 O 3 and Al 2 O 3 , improving the corrosion properties of the coating. Also, chrome oxide layers are denser than titanium oxide layers, so nitride coatings on the chromium base can have a higher corrosion resistance. 5,17,18 Hence, more advanced coatings, like CrAlN multilayer coatings, have a better performance than the simple nitrides. 12,[19][20][21][22] It has been found out that

show abstract

“…As one of well-known spinels (typically refers to AB 2 O 4 , A 2+ , B 3+ or A 4+ , B 2+ ), magnesium aluminate (MgAl 2 O 4 ) has been mainly developed and applied in industrial and military applications, including high-pressure arc lamps, transparent armor, optical heat exchangers, and missile domes [1] Among them, appropriate transparent ceramic based materials were employed due to its unique properties, like high thermal stability with high melting point of 2135˚C [6], unique optical properties and mechanical strength at high temperature. With increasing utilizations of catalyst and support, MgAl 2 O 4 spinel has been synthesized with high purity, small particle size with uniform pore size distribution and high surface area.…”

Section: Introductionmentioning

confidence: 99%

Effect of Synthetic Parameters on Synthesis of Magnesium Aluminum Spinels

Duan¹,

Wang²,

Zhang³

et al. 2019

MSCE

View full text Add to dashboard Cite

In this work, the magnesium aluminum spinel (MgAl 2 O 4) was prepared by Mg and Al as precursors through a method of sol-gel subsequent with high temperature calcination. The wide range of synthetic conditions, including organic alcohols, ammonia content, dispersant, alkoxide concentration, hydrolysis time, hydrolysis temperature and calcination temperature were screened over as-prepared samples. This work provides a necessary experimental basis for the synthesis of MgAl 2 O 4 with uniform particle size of spherical structure, which has a potential to be used in many industrial and military applications.

show abstract

Low-temperature synthesis of micro/nano Lithium Fluoride added magnesium aluminate spinel

Cited by 11 publications

References 36 publications

Hydrogen Production from Methane Cracking in Dielectric Barrier Discharge Catalytic Plasma Reactor using a Nanocatalyst

Hydrogen Production from Methane Cracking in Dielectric Barrier Discharge Catalytic Plasma Reactor using a Nanocatalyst

Enhancement of the Ti‐6Al‐4V alloy corrosion resistance by applying CrN/CrAlN multilayer coating via Arc‐PVD method

Effect of Synthetic Parameters on Synthesis of Magnesium Aluminum Spinels

Contact Info

Product

Resources

About