Materials Literature
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Es wurde eine Untersuchung zum Mechanismus der Vernetzung von Polychloropren durch Ethylenthioharnstoff in Kombination mit Zinkoxid durchgefuhrt. Dies wurde mit einer Uberprufung der Vernetzungsmechanismen von Polychloroprenkautschuk mit Ethylenthioharnstoff und Zinkoxid getrennt bzw. gemeinsam erreicht. Dabei kamen s…
양이온 교환막 연료전지 운전 중에 발생하는 하이드록시 라디칼에 의한 전해질 막의 산화분해를 효과적으로 방지하기 위해 유기물 라디칼냐��쳐를 도입하였다. 술폰화 폴리아릴렌에테르술폰 고분자를 이용하여 폴리페놀 화합물의 일종인 루틴을 도입하여 복합막을 제조하였고, 제조된 고분자 전해질 복합막은 함수율 및 이온전도도의 측정을 통하여 루틴이 전해질 막의 물리화학적 성질에 미치는 영향에 대해서 조사하였다. 실제 연료전지 운전과 유사한 조건을 구현할 수 있는 과산화수소 폭로 가속화 평가장치를 이용하여 전해질 복합막의 산화안정성을 평가하였다. 루틴을 함유한 고분자 전해질 복합막은…
This research study aimed at using renewable resources from biomass to generate novel polymers and surfactants for applications in Home and Personal Care products. Esterification, transesterification, epoxidation and ring opening reactions were applied with the instrumentality of clean synthetic techniques to deliver…
Growth of potassium tantalate niobate (KTa X Nb1-X O3) single crystals by the vertical Bridgman (VB) method was investigated. KTN crystals were grown using a KTaO3 seed and K-rich raw materials in a platinum crucible in air. When raw material with an atomic ratio of Ta to Nb of 65:35 was used, a KTN crystal could be o…
A facile synthesis route of cuprous oxide (Cu2O) was introduced. Properties of obtained thin film varied as functions of reaction temperature. Morphology and structure of Cu2O are analyzed by SEM, XRD and FTIR. The catalytic performances and reaction kinetics of Cu2O catalyst for the degradation of Rhodamine B (RhB) a…
The microstructure, elastic properties and high-temperature behavior of silica refractories are characterized by the Archimedes method, stereology-based image analysis, mercury porosimetry, dilatometry and impulse excitation. Stereology-based image analysis and mercury porosimetry showed that the sample with lowest po…
The band structure and electron transport properties of Mn11Si19 higher manganese silicide (HMS), which solely consists of cheap and nontoxic elements and possess high ZT-value exceeding 0.5 at around 1000 K, were calculated to reveal the characteristics in electronic structure and their roles in making the electron t…
By using 3D printing process, various ceramics dendrites with spatially ordered micro cavities were successfully fabricated. Ceramic micro lattices with coordination numbers 4, 6, 8 and 12 were propagated spatially in computer graphic space. Ceramics nanoparticles were dispersed in to photo sensitive liquid resins at…
TiO2 possesses photocatalytic functions, even though they are relatively weak and required further enhancements for wider practical usages. On the other hand, improving materials surface functions by introducing surface textures is of great interest in various fields. This study aims to develop a high-functional photo…
This chapter contains sections titled: Introduction The Continuing Evolution of Biomaterials Tissue Engineering and Regenerative Medicine Coating Process Development
Emerging applications of ordered, macroporous oxide photonic structures for thermal barrier coatings, structural coloration, and thermophotovoltaics requires the stability of these features at operating temperatures. However, in high-temperature environments (>1000 °C), these structures can exhibit significant undesir…
The capability of silicon nitride to withstand high contact stress, in combination with low friction towards steel, makes the material suitable in applications such as hybrid ball bearing systems. A broad utilization of this concept has as yet not materialized, mainly due to the high manufacturing cost as well as to r…
In this paper, a fabrication process of porous ceramics with cylindrical pores and incorporating pores was discussed. The cylindrical pores were formed during the unidirectional solidification of aqueous slurry containing CO2 gas under reduced pressure and a composite of ice and ceramics powder was obtained. An incorp…
Thermal conduction and phonon transport in both single-crystalline and polycrystalline Si two-dimensional phononic crystal (PnC) nanostructures were investigated. The impact of phononic patterning on thermal conductivity was larger in polycrystalline Si PnCs than in single-crystalline Si PnCs. The difference in the im…
This chapter contains sections titled: Introduction DC Glow Discharges RF Glow Discharges RF Diode Glow Discharges Ionization in RF Diode Glow Discharges Inductively Coupled RF Discharges Mid-Frequency AC Discharges Pulsed DC Discharges Comparison of Plasma Properties Plasma Species Summary
Single crystal fibers are an intermediate between laser crystals and doped glass fibers. They have the advantages of both guiding laser light and matching the efficiencies found in bulk crystals, which is making them ideal candidates for high-power laser and fiber laser applications. This work focuses on the growth of…
This chapter contains sections titled:
High-temperature coating systems, which were used in gas turbine engines, usually consist of a ceramic Thermal Barrier Coating (TBC) on top, an intermediate metallic-Bond Coating (BC) and a superalloy substrate. It is usually used that yttria-stabilized zirconia (YSZ) as a top coating (TC) and CoNiCrAlY alloy as bond…
Using anodized pure aluminum, 3102 aluminum alloy and 6061 aluminum alloy as the templates, TiO2 thin films were prepared through a liquid deposition method. The TiO2 nanotubes fabricated on the 3102 aluminum alloy substrate had one-dimensional tubular structures, similar to that obtained on pure aluminum substrate, w…
This paper reports the usefulness of porous electrochemical devices with oxide ion electrolytes for the production of a H2 fuel by (1) reforming of biogas with a typical composition of 60% CH4–40% CO2 (CH4 + CO2 → 2CO + 2H2) and by (2) the shift reaction of CO with H2O (CO + H2O → H2 + CO2). Reforming of CH4 with CO2…