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Volume 4 No. 2
15 April 2015

Yanchun ZHOU,Huimin XIANG,Xinpo LU,Zhihai FENG,Zhongping LI

2015, 4(2): 83-93.   doi:10.1007/s40145-015-0140-6
Abstract ( 295 HTML ( 2   PDF(1384KB) ( 307 )   Save

The mechanical and thermal properties of Y4Al2O9 were predicted using a combination of first-principles and chemical bond theory (CBT) calculations. Density functional theory (DFT) computations were performed for the structural, mechanical, and thermal properties, and the results were confirmed by chemical bond theory. Based on the calculated equilibrium crystal structure, heterogeneous bonding nature has been revealed, i.e., Al–O bonds are stronger than Y–O b...

Yanchun ZHOU,Xinpo LU,Huimin XIANG,Zhihai FENG

2015, 4(2): 94-102.   doi:10.1007/s40145-015-0141-5
Abstract ( 421 HTML ( 0   PDF(1496KB) ( 419 )   Save

In our previous work, anisotropic chemical bonding, low shear deformation resistance, damage tolerance ability, low thermal conductivity, and moderate thermal expansion coefficient of Y4Al2O9 (YAM) were predicted. In this work, phase-pure YAM powders were synthesized by solid-state reaction between Y2O3 and Al2O3 and bulk YAM ceramics were prepared by hot-pressing method. Lattice parameters and a new set of X-ray pow...

Xuegang HUANG,Jie HUANG,Zhongmin ZHAO,Long ZHANG,Junyan WU

2015, 4(2): 103-110.   doi:10.1007/s40145-015-0137-1
Abstract ( 319 HTML ( 1   PDF(7570KB) ( 637 )   Save

The novel ceramic/metal composite materials were successfully fabricated by combustion synthesis in high gravity field. In this paper, the Ti–B4C was selected as the main combustion reaction system to obtain TiB2–TiC ceramic substrate, and the 1Cr18Ni9Ti stainless steel was selected as the metal substrate. It was found that the TiB2–TiC/1Cr18Ni9Ti composite materials exhibited continuously graded composition and hybrid microstructure. The TiC1-x

Nobuhito IMANAKA,Toshiyuki MASUI,Kazuya JYOKO

2015, 4(2): 111-117.   doi:10.1007/s40145-015-0138-0
Abstract ( 263 HTML ( 0   PDF(1013KB) ( 294 )   Save

Partial oxidation of cyclohexane into cyclohexanone and cyclohexanol (KA-oil) is an industrially significant reaction for producing precursors for the synthesis of ε-caprolactam and adipic acid, which are the building blocks of nylon. However, to date, the cyclohexane conversion ratio has usually been limited to less than 6% to prevent further oxidation of the cyclohexanol and cyclohexanone targets. In this study, we report that Pt/CeO2–ZrO2–SnO2/SiO

Timur Sh. ATABAEV,Jong Ho LEE,Dong-Wook HAN,Hyung-Kook KIM,Yoon-Hwae HWANG

2015, 4(2): 118-122.   doi:10.1007/s40145-015-0139-z
Abstract ( 286 HTML ( 0   PDF(1936KB) ( 354 )   Save

In the present study, we report a fabrication of dual-mode carbon coated gadolinia C@Gd2O3 particles by a facile hydrothermal synthesis method without using any organic solvents. The prepared C@Gd2O3 particles have a core–shell structure and a narrow size distribution in the range of 261±27 nm. The fluorescent properties of the prepared C@Gd2O3 particles were accessed by a room-temperature photoluminescence study, while the lon...

A. N. MALLIKA,A. Ramachandra REDDY,K. Venugopal REDDY

2015, 4(2): 123-129.   doi:10.1007/s40145-015-0142-4
Abstract ( 356 HTML ( 0   PDF(1509KB) ( 468 )   Save

The effects of annealing temperatures and chelating agents on the structural and optical properties of ZnO nanoparticles were investigated. The average particle size of ZnO nanoparticles increased with increase of annealing temperatures. The decrease of the full width at half maximum (FWHM) with increasing annealing temperatures inferred increase of particle/grain growth. The grain sizes were also observed to be increased with increase of annealing temperatures. From the absorption spectra of...

Yupeng GAO,Libo WANG,Zhengyang LI,Yafei ZHANG,Baolin XING,Chuanxiang ZHANG,Aiguo ZHOU

2015, 4(2): 130-134.   doi:10.1007/s40145-015-0143-3
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Two-dimensional (2D) carbide Ti3C2 was synthesized by exfoliating Ti3AlC2 in HF solution and used for supercapacitive performance investigation in 3 M KOH electrolyte. The specific surface area (SSA) of as-synthesized Ti3C2 was 22.35 m2/g. Ti3C2-based supercapacitor electrodes exhibited good energy storage ability and had a volumetric capacitance 119.8 F/cm3 at the current density of ...

P. N. MEDEIROS,Y. F. GOMES,M. R. D. BOMIO,I. M. G. SANTOS,M. R. S. SILVA,C. A. PASKOCIMAS,M. S. LI,F. V. MOTTA

2015, 4(2): 135-141.   doi:10.1007/s40145-015-0145-1
Abstract ( 434 HTML ( 1   PDF(1183KB) ( 438 )   Save

Synthetic inorganic pigments are most widely used in ceramic applications due to their excellent chemical and thermal stability and their lower toxicity to both human and environment as well. In the present work, black ceramic pigment CoFe2O4 has been synthesized by the complex polymerization method (CPM) with good chemical homogeneity. In order to study the influence of variables on the process of obtaining pigment through CPM, 2(5-2) fractional factorial des...

L. Jay DEINER,Michael A. ROTTMAYER,Bryan C. EIGENBRODT

2015, 4(2): 142-151.   doi:10.1007/s40145-015-0147-z
Abstract ( 272 HTML ( 0   PDF(1903KB) ( 262 )   Save

The evolution of powder particle size, crystal structure, and surface chemistry was evaluated for micron scale NiO powders subjected to impact milling with commonly employed milling additives: methanol, Vertrel XF, and amorphous carbon. The effect of the different comminution protocols on sintered body microstructure was evaluated for high temperature sintering in inert atmosphere (N2). X-ray photoelectron spectroscopy showed that NiO powder surface chemistry is surprisingly sensit...

Yao XIONG,Zilong TANG,Yu WANG,Yongming HU,Haoshuang GU,Yuanzhi LI,Helen Lai Wah CHAN,Wanping CHEN

2015, 4(2): 152-157.   doi:10.1007/s40145-015-0148-y
Abstract ( 292 HTML ( 1   PDF(2718KB) ( 525 )   Save

Pure and noble metal (Pt, Pd, and Au) doped TiO2 nanoceramics have been prepared from TiO2 nanoparticles through traditional pressing and sintering. For those samples sintered at 550 ℃, a typical premature sintering occurred, which led to the formation of a highly porous microstructure with a Brunauer–Emmett–Teller (BET) specific surface area of 23 m2/g. At room temperature, only Pt-doped samples showed obvious response to hydrogen, with sensitivities a...