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Volume 07 No. 04
05 December 2018

Zhengjuan WANG, Guohong ZHOU, Danyu JIANG, Shiwei WANG

2018, 07(04): 289-306.   doi:10.1007/s40145-018-0287-z
Abstract ( 41 HTML ( 1   PDF(4046KB) ( 34 )   Save

A2B2O7 system compounds, which usually present three phase structures mainly based on the ionic radius ratios of rA and rB (rA/rB), have been studied for potential applications in many fields, such as thermal barrier coatings, luminescence powders, fast-ion conductors, photocatalysts, and matrices for immobilization of highly active radionuclides. Since 2005, La2Hf2O<...

Jin-jun LIAO, Peng-zhao GAO, Lin XU, Jian FENG

2018, 07(04): 307-316.   doi:10.1007/s40145-018-0280-6
Abstract ( 20 HTML ( 1   PDF(2643KB) ( 14 )   Save

In this paper, temperature dependence of nanoporous framework evolution process and variety of pore properties (pore volume, specific surface area (BET), and pore size) of SiO2 aerogels were characterized by FTIR, XPS, XRD, SEM, TEM, BET, BJH, etc. Results show that SiO2 aerogels treated at different temperatures all possess amorphous structure. With the increase of treated temperatures, BET values of SiO2 aerogels increase initially and then decrease, and it ...

Juanjuan CHEN, Jixin CHEN, Hao ZHANG, Minmin HU, Meishuan LI

2018, 07(04): 317-324.   doi:10.1007/s40145-018-0281-5
Abstract ( 19 HTML ( 0   PDF(1855KB) ( 9 )   Save

A series of h-BN based composites with Yb4Si2O7N2 as a secondary phase were successfully synthesized by an in situ reaction hot pressing method. It was found that the relative density and room-temperature mechanical properties monotonically increased with increasing the content of Yb4Si2O7N2 from 20 to 50 vol%. When 50?vol% Yb4Si2O7N2 was introduced...

Dhruba PANTHI, Nader HEDAYAT, Yanhai DU

2018, 07(04): 325-335.   doi:10.1007/s40145-018-0282-4
Abstract ( 34 HTML ( 0   PDF(2268KB) ( 20 )   Save

Yttria-stabilized zirconia (YSZ) is the most common electrolyte material for solid oxide fuel cells. Herein, we conducted a comparative study on the densification behavior of three different kinds of commercial 8 mol% YSZ powders: (i) TZ-8Y (Tosoh, Japan), (ii) MELox 8Y (MEL Chemicals, UK), and (iii) YSZ-HT (Huatsing Power, China). The comparison was made on both the self- supporting pellets and thin-film electrolytes coated onto a NiO–YSZ anode support. For the pellets, MELox 8Y showed the h...

Ling LIU, Wei ZHENG, Zhuang MA, Yanbo LIU

2018, 07(04): 336-342.   doi:10.1007/s40145-018-0283-3
Abstract ( 13 HTML ( 0   PDF(2032KB) ( 10 )   Save

ZrSiO4 bulk was prepared by pressureless sintering process and ZrSiO4 coating was deposited on the SiCf/SiC substrate using air plasma method. The microstructures of ZrSiO4 bulk and ZrSiO4 coating are both dense. A preliminary study of a water vapor corrosion test for ZrSiO4 bulk and ZrSiO4 coating was performed under the conditions of 1.013×105 Pa, 90%H2O/10%O2, 1300 ℃, and lo...

Kaixuan GUI, Fangyu LIU, Gang WANG, Zhongjia HUANG, Ping HU

2018, 07(04): 343-351.   doi:10.1007/s40145-018-0284-2
Abstract ( 12 HTML ( 0   PDF(2117KB) ( 4 )   Save

ZrB2–SiC/ZrSi2 ceramics containing 30 vol% carbon fiber (Cf) additive were fabricated by hot pressing at low temperature (1500 ℃) using submicron ZrB2 powders, and their microstructural evolution and performance were investigated. The addition of SiC or ZrSi2 significantly reduced the onset sintering temperature and enhanced the densification of ZrB2. ZrB2–ZrSi2–Cf showed poor performance...

Wei YANG, Qiang LI, Xiaohong ZHENG, Xi LI, Xin LI

2018, 07(04): 352-361.   doi:10.1007/s40145-018-0285-1
Abstract ( 23 HTML ( 0   PDF(1378KB) ( 17 )   Save

Sulfosalicylic acid (SSA) was used as an intercalation agent and an excellent antenna to synthesize layered rare-earth hydroxide (LRH) materials and directly obtain SSA-modified terbium-doped ytterbium hydroxide nanosheets by mechanical exfoliation. The crystal structure and morphologies of the LRHs and nanosheets were determined by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The particle size and zeta potential of the prepared nanosheets were also a...

Stanislav S. BALABANOV, Dmitry А. PERMIN, Elena Ye. ROSTOKINA, Sergey V. EGOROV, Andrey A. SOROKIN

2018, 07(04): 362-369.   doi:10.1007/s40145-018-0286-0
Abstract ( 13 HTML ( 0   PDF(1856KB) ( 6 )   Save

The synthesis of nanopowders of terbia compounds with scandia, yttria, and lutetia was carried out using a self-propagating high-temperature synthesis method involving a mixture of nitrates of metals and glycine as a precursor. The nanopowder phase transformations were investigated using X-ray diffraction analysis. It was found that lutetia has a negligible effect on the phase formation in terbia. On the other hand, yttrium and scandium ions significantly suppressed crystallization. The densi...

Tuğba Tunç PARLAK, A. Şükran DEMIRKIRAN

2018, 07(04): 370-379.   doi:10.1007/s40145-018-0288-y
Abstract ( 21 HTML ( 0   PDF(2873KB) ( 7 )   Save

In this study, natural zeolite was used as source of silica to produce cordierite. MgO and Al2O3 were added to zeolite to obtain the cordierite stoichiometry. Mixture of these raw materials was mechanically activated for different durations. The mechanically activated powder mixture was characterized using XRD, DSC, SEM, specific surface area, and particle size analyzer. The pycnometer method was used to measure the densities of mechanically activated powder mixtures. Me...

Zuzhi HUANG, Linghong LUO, Liangguang LIU, Leying WANG, Liang CHENG, Xu XU, Yefan WU

2018, 07(04): 380-387.   doi:10.1007/s40145-018-0294-0
Abstract ( 34 HTML ( 0   PDF(1631KB) ( 8 )   Save

Owing to adjustable thermal expansion performance, BaO–CaO–Al2O3–B2O3–SiO2 (BCABS) glass has a promising commercialization prospect for intermediate temperature-solid oxide fuel cells (IT-SOFCs) sealing. Herein, Al2O3 with two different contents was added into the same glass formulation, referred to as A and B glass, respectively. In terms of the non-isothermal crystallization kinetic behavior, the effect of Al2...

Youjun LU, Zhenxia YUAN, Hongfang SHEN, Xiaochen HUAI, Zhenkun HUANG

2018, 07(04): 388-391.   doi:10.1007/s40145-018-0302-4
Abstract ( 16 HTML ( 0   PDF(754KB) ( 5 )   Save

Zirconium nitride (ZrN) ceramics were prepared via hot pressed sintering (HP) at 1750 ℃ in N2 atmosphere with ZrO2–Y2O3 as sintering additive. X-ray diffraction was applied to analyze the phase composition of the as-prepared ceramics to study the high temperature phase relation in ZrN–ZrO2–Y2O3 ternary system and establish ZrN–ZrO2–Y2O3 ternary phase diagrams. The results show ...