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Article
Synthesis, phase structure and dielectric properties of CoTiTa2O8 by molten salt method for LTCC application
The advancement of low-temperature co-fired ceramic (LTCC) technology has led to increased demands for microwave dielectric ceramics. Among various material systems, the ATiB2O8 (A = Mg2+, Zn2+, Cu2+, Co2+, Ni2+;...
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Article
Ionic Liquid Functionalized Polymer as an Efficient Solid Acid Catalyst for the Esterification Between Methanol and Methylacrylic Acid
Achieving esterification of methacrylic acid and methanol under mild conditions is challenging but cost-effective. It is important to develop a catalyst with high catalytic activity and stable structure. There...
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Article
Synthesis, phase structure and dielectric properties of MgTiTa2O8 by molten salt method
The MgTiTa2O8 ceramics were synthesized in the molten salt KCl. We have conducted an examination of the phases, microstructure, and microwave dielectric characteristics of MgTiTa2O8 ceramics. This investigation i...
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Article
The Synthesis of Ionic Liquid Functionalized Polymer and its Application in the Esterification Between Methacrylic Acid and Methanol
High yield of methyl methacrylate was gained by using ionic liquid functionalized copolymer of ethylene dimethacrylate and 4-vinylbenzyl. The solid acid catalyst (VEM-ILs) was obtained through quaternary ammon...
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Article
A novel synthetic method of porous and nanoflower-like Al2O3/MoS2 catalyst for reduction of SO2 to elemental sulfur
MoS2 nanoflowers are favored for their potential in the production of elemental sulfur due to abundant surface area and good catalytic performance for reducing SO2. A novel synthetic strategy of porous Al2O3 supp...
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Article
Influence of Surface Roughness of Stator on Dry Sliding Behavior against Rotor in Pneumatic Downhole Motor
There are many factors affecting the wear behavior of the dynamic seals tribo-pairs in pneumatic downhole tools, such as tribo-materials, load, and surface roughness. In this work, to investigate the influence...
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Article
Simple hydrothermal synthesis of g-C3N4/Ni9S8 composites for efficient photocatalytic H2 evolution
The prompt recombination between photogenerated electrons and holes is the common problem for improving the hydrogen evolution performance of a photocatalyst, which could be solved greatly by composite co-cata...
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Article
Open AccessEffect of anionic group [SiO4]4−/[PO4]3− on the luminescence properties of Dy3+-doped tungstate structural compounds
Novel scheelite structures of Li2Ca(WO4)2, Li2Ca2(WO4)(SiO4), and LiCa2(WO4)(PO4) fluorescent materials were successfully prepared using a high-temperature solid-phase process. The compounds were characterized by...
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Article
Open AccessHigh-entropy (Nd0.2Sm0.2Eu0.2Y0.2Yb0.2)4Al2O9 with good high temperature stability, low thermal conductivity, and anisotropic thermal expansivity
The critical requirements for the environmental barrier coating (EBC) materials of silicon-based ceramic matrix composites (CMCs) include good tolerance to harsh environments, thermal expansion matches with th...
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Article
Microwave dielectric properties of novel (1 − x)MgTiO3–xCa0.5Sr0.5TiO3 ceramics
In this work, the microstructure and microwave dielectric properties of novel (1 − x)MgTiO3–xCa0.5Sr0.5TiO3 (x = 0.035–0.045) ceramics were investigated. The samples were prepared via the solid-state sintering me...
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Article
Open AccessHigh entropy defective fluorite structured rare-earth niobates and tantalates for thermal barrier applications
Rare-earth tantalates and niobates (RE3TaO7 and RE3NbO7) have been considered as promising candidate thermal barrier coating (TBC) materials in next generation gas-turbine engines due to their ultra-low thermal c...
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Article
Improved mechanical performance and wear resistance of Ti-coated cBN–WC–Ni composites
Composites of 0–20 vol% Ti-coated cBN (cBN@Ti) particles dispersed in WC–Ni were densified by spark plasma sintering under 50 MPa at 1300 °C. The cBN particles were distributed homogeneously with a Ti-rich int...
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Article
Open AccessNiMoAl catalysts derived from heptamolybdate-intercalated layered double hydroxides for hydrodeoxygenation of anisole
The catalytic performance of NiMoAl catalysts derived from layered double hydroxide (LDH) precursors with molybdenum species incorporated into the interlayers was investigated for the hydrodeoxygenation (HDO) ...
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Article
Vertically standing ultrathin MoS2 nanosheet arrays on molybdenum foil as binder-free anode for lithium-ion batteries
Layered MoS2 nanostructures are outstanding anode materials for lithium-ion batteries due to their potentially high capacity. Here, we report a flexible binder-free anode for LIBs, which was fabricated from verti...
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Article
Effect of thermal treatment time on high-performance varistors prepared by hot-dip** oxygen-deficient zinc oxide thin films in bismuth oxide powder
Through radio-frequency magnetron sputtering zinc oxide sintered ceramic target, oxygen-deficient zinc oxide (ZnO0.81) thin films with a thickness of roughly 270 nm were deposited. Then, through hot-dip** the a...
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Article
Segregation Behavior of Metal Impurities During Al-Si Melt Directional Solidification with an Open Ended Crucible
The distribution characteristic and segregation behavior of metal impurities during directional solidification of Al-20Si, Al-30Si and Al-40Si alloys have been investigated. The morphologies of the alloys and ...
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Article
Controllable synthesis of MoS2 nanostructures from monolayer flakes, few-layer pyramids to multilayer blocks by catalyst-assisted thermal evaporation
Molybdenum disulfide (MoS2), as a representative of two-dimensional layered materials, has been extensively investigated due to their unique structure and interesting electronic and optical properties. However, t...
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Article
Molten-salt fabrication of (N,F)-codoped single-crystal-like titania with high exposure of (001) crystal facet for highly efficient degradation of methylene blue under visible light irradiation
Single-crystal-like TiO2 is claimed to be a very promising material among various catalysts. In this study, the (N,F)-co-doped single-crystal-like TiO2 was prepared by a new molten mixing process in which the mix...
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Article
Open AccessPressureless glass crystallization of transparent yttrium aluminum garnet-based nanoceramics
Transparent crystalline yttrium aluminum garnet (YAG; Y3Al5O12) is a dominant host material used in phosphors, scintillators, and solid state lasers. However, YAG single crystals and transparent ceramics face sev...
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Article
C fibers@MoO2 nanoparticles core–shell composite: Highly efficient solar-driven photocatalyst
As an important member of semiconducting transition metal oxides, MoO2 nanomaterials have many advantages in optical and electrical applications. However, MoO2 itself has no significant photocatalytic performance...
