Materials Literature
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Lethal dose of some medicinal herbs used across the globe, for various purposes, have been reported by various workers. In this study, the acute toxicity effect and the LD of aqueous leaf extract of Leptadenia hastata treated white albino rats were investigated. Thirty (30) rats of both sexes weighing 285-308g body we…
低融点，低熱膨張性，高耐水性に優れた封着加工用鉛フリーガラスは，封着材としてセラミックスやエレクトロニクス産業の分野で望まれている．本研究では，V2O5–Li2O–TeO2系の三成分の金属酸化物を選択し，さまざまな組成で調製し，封着加工用鉛フリーガラスとしての要求を満たすガラスの評価を行った．具体的な評価としては，熱量分析におけるガラス転移点，ガラス軟化点，結晶析出点，熱機械分析における熱膨張特性，粉末X線におけるガラス構造確認を行い，三成分系のガラス化範囲の同定を行った．その結果，(10–40 mol%)V2O5–(0–40 mol%)Li2O–(30–70 mol%)TeO2の範囲において封着加工用ガラスとして低温軟化性で非晶…
On the path to sustainable electric power generation the efficiency of fossil-fuel power plants needs to be increased and CO2-emissions have to be reduced respectively. The main goal of the project is therefore to find the most efficient low-carbon power plant configuration, by means of the integration of high tempera…
The triangular Au nanoparticle array of size 37 nm was fabricated on a quartz substrate using nanosphere lithography. By performing the Z-scan method with femtosecond laser (800 nm, 50 fs), the optical nonlinearity of the Au nanoparticle array was determined. The results showed an intensity-related two-photon absorpti…
In this paper we report on a new kind of tri-color luminescence glass which can be excited efficiently by long-wavelength ultraviolet. These samples are prepared by melting silicon-borate raw material co-doped with Ce3+/Mn2+, Ce3+/Tb3+ and Eu2+, respectively. Among these doped ions, Mn2+, Tb3+ and Eu2+ are activators…
Abstract: In this study, natural and biodegradable chitosan/agar blend gel-beads were prepared via the interphase method. Agar was added to chitosan dissolved in aqueous acetic acid and stirred homogenously under a controlled temperature. With a syringe, the gel solution were added and dropped wisely to the oily phase…
Very short helix pitch (p 0 ~150-200nm) ferroelectric liquid crystals (FLCs) have been developed. Electro-optical cells based on these mixtures are free from selective reflection and diffraction in the visible spectral range and therefore exhibit very perfect operation in deformed helix ferroelectric (DHF) mode. Two m…
Simulating fragment penetration into steel involves complicated modeling of severe behavior of the materials through multiple phases of response. Penetration of a fragment-like projectile was simulated using finite element (FE) and meshfree particle formulations. Extreme deformation and failure of the material during…
One of the most commonly used materials in electrical cables is flexible PVC.In this work, the effects of the modelling decisions and parameter estimation methods on the pyrolysis modelling of two PVC cables were studied.The kinetic and thermal parameters were estimated from TGA and cone calorimeter experiments.The ro…
In this work, a new glass-ceramic coating has been developed and applied, as a single coat without prior chemical treatment of the surface, by using the dipping technique on metal substrate. the coating are designed for application on varies grades of low alloy steel, the selected substrate was low carbon low alloyed…
现在的工作调查了不同扔的技术生产的 AISI M2 高速度钢的团结微观结构，也就是，铁模子扔和连续 casting.The 结果表明钢的当演员组结构由铁矩阵和 M2C 最容易溶解的碳化物网络组成，它被扔 process.M2C 的铁模子极大地在连续扔的过程做的铸块锭精制，与那相比最容易溶解的碳化物在他们的形态学介绍了变化
Effects of anodizing conditions on corrosion resistance of Mg–Li–Y alloy, which is most prominent super light alloy capable for easy deformation, were investigated with attention to the formation behavior and microstructure of anodic films. Barrier films or semi-barrier films were formed except at around 7 V and break…
The leaves of the oil palm species Elaeis Guineensis were found to be a rich source of phenolic compounds. In an effort to dispose waste oil palm leaves usefully, our research team explored the antioxidant characteristics and tackifying ability of oil palm leaf extract (OPE) in a natural rubber-based formulation. Afte…
A review is given of recent solid–state NMR work on structure and molecular dynamics of polyolefins such as isotactic poly(1–butene) (iPB1) and isotactic polypropylene (iPP). In iPB1, melt–crystallization leads to metastable form II, and subsequent solid–solid transition results in stable form I. 1 H– 13 C wide line s…
CuPd alloys are among the most promising materials for future hydrogen separation membranes and membrane reactor applications due to their high hydrogen selectivity and permeability, improved sulfur poisoning resistance and mechanical properties. The increased permeability of certain binary CuPd compositions has been…
Blast-furnace slag was used as an active addition of magnesium phosphate cement.The influence of blast-furnace slag on the setting time,mechanical property,mineral phase and microstucture of slag blended magnesium phosphate cement(MPC)was studied.The prescription was designed as follows:the ratio of monoammonium phosp…
The recent research status of materials degradation in nuclear power plant(NPP) has been analyzed.The main research progresses include:kinetics of corrosion electrochemistry in high temperature pressurised water,preferential intergranular oxidation and the degradation of grain boundary strength,special grain boundary…
We researched the flashover voltage of the ice-covered 110 kV AC full-size glass insulator strings in an artificial climate room,and researched the effect of the icing and melting water,the length of the icicles and the ESDD on the flashover voltage.Three different lengths of the icicles and three different ESDD were…
A mathematical model based on the tunnel effect was established to describe tunnel resistivity of carbon black-filled ce-ment-based composites(CBCC).Relationships between the tunnel resistivity and microstructure parameters,motion parameters of carriers as well as external electric field strength in the CBCC were esta…
Although considerable attention has been given to the unique properties of graphene membranes and graphene nanoribbons, graphene nano-flakes offer a greater range of structural configurations and potential for a range of applications. In contrast, far fewer studies have focused on these tiny quasi-zero dimensional mat…