Materials Literature
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Aiming at the shortcoming that base-catalyzed quarter-wave silica antireflective coatings,prepared by sol-gel method,are porous and therefore low environment-resistant,water/NH3vapor and/or hexamethyldisilazane vapor were utilized to modify the surface of these coatings to obtain high hydrophobicity and abrasion-resis…
ZnO:Mn thin films were prepared on glass substrates using RF magnetron sputtering method.Raman spectroscopy,X-ray diffraction spectra and SEM were used to analyze the structural characteristics of ZnO:Mn films with the different working pressure.The results show that ZnO:Mn thin films have the significant wurtzite str…
This article may produce an impression that it deals with low priority issues of pipelines corrosion inhibitor protection processes and corrosion inhibitors (CI) lab testing techniques.However, it is proved that clear understanding of CI active molecules location makes it possible to identify the causes of CI ineffici…
Our work is focused on simplifying STED microscopy. We are currently developing two STED microscopes based new concepts which aim at using only one laser source for both excitation and stimulated emission depletion.
通过熔融共混,制备了等规聚丙烯（iPP）/纳米碳酸钙（nano-CaCO3）复合材料,研究了不同剪切环境下nano-CaCO3粒子在聚丙烯（PP）基体中的分散性能及其对基体熔融过程的影响,并利用广角X射线散射仪（WAXS）、差示扫描量热仪（DSC）、偏光显微镜（PLM）、扫描电镜（SEM）考察了该复合材料的结晶行为。结果表明：在剪切环境中,nano-CaCO3粒子与基体的摩擦、碰撞几率增加;随着nano-CaCO3用量的增加,体系剪切热升高,加快了基体熔融的速度,并改善了nano-CaCO3的分散效果。当nano-CaCO3用量低于3%时,其在PP基体中起到成核剂的作用,提高了PP的结晶度,并诱导β型晶体的生成;当其用量超过3%时…
This paper introduced several methods of measuring rotational viscosity of nematic liquid crystal,and analyzed the characteristic of each.According to the method of transient current,the rotational viscosity of nematic LC mixture has been gotten.Through improving the method of measuring dielectric constant Δe of liqui…
Разработаны условия синтеза полифазных нанокомпозитов в широком интервале соотношений TiO2 и Al2O3, характеризующихся термически устойчивой мезопористой структурой и высокой удельной поверхностью, некоторые из которых фотокаталитически активны при облучении светом с 670 нм.
Spinel structure MgA12O4 is an important compound oxide for de-sulfur catalysts or electronic devices. There had been proposed so many-kinds of synthesis routes for MgAl2O4, however, it is still very difficult to get a pure and stoichiometric MgAl2O4 powder with high specific surface area. The authors approached by us…
Samples from mechanically alloyed aluminium powder were prepared by a simple press and sintering method in order to study the influence of a flow of ammonia gas during a short time of the milling process. All milling experiences were carried out at room temperature for a total of 10 hours. Millings were carried out in…
Разработан метод расчета, с использованием которого по литературным экспериментальным данным рассчитан состав органической фазы в системе H2O UO2(NO3)2трибутилфосфат (ТБФ). Среднее квадратичное относительное отклонение рассчитанных молярных концентраций от экспериментальных составило по урану U = 6.4%, по воде w = 7.…
次世代低コスト太陽電池として期待される色素増感太陽電池（DSSC）の変換効率向上には，可視から近赤外にわたる広帯域吸収をもつ色素の開発が必要である。われわれは，DSSCでおもに用いられる金属錯体系色素の吸収波長の拡張に，基底一重項状態から励起三重項状態へのスピン禁制遷移の利用が有効だと考えた。一般に，スピン禁制遷移は文字通り「禁制」であるため吸収強度が弱く，そのままではDSSCに応用することができないと考えるのが普通だが，われわれはこの常識を覆し，近赤外域にスピン禁制遷移による強い吸収を示す新たな遷移金属錯体を開発した。この色素を用いたDSSCでは，可視から近赤外（約1 µm）にわたり高い量子効率で光電変換でき，これを用いたタンデ…
Для оценки характера изменения термодинамических свойств смешанного уран-плутониевого оксидного топлива, имеющего высокую радиоактивность и токсичность, проведены измерения характеристик аналогичных по свойствам уран-цериевых оксидов. Методами электродвижущей силы твердо-электролитной гальванической ячейки и твердофаз…
以Fe30自熔合金粉末和镍包覆碳化钨粉末(Ni60A+WC)为原料,利用等离子熔覆工艺在Q235表面制备了Ni60A+WC增强Fe基多层梯度涂层。研究了铁基涂层中富钨型碳化物M6C的析出特征。结果表明,梯度涂层中析出的富钨型碳化物特征与Ni60A+WC含量有关,随着Ni60A+WC含量逐渐递增(0,10,20,30,40,50,质量分数,%),梯度涂层中出现了两类不同的富钨型M6C碳化物。第1类为枝晶间共晶碳化物M6C(Ni60A+WC含量小于30%),M6C中钨/铁元素的质量比小于5.29,形貌特征为片层状和粒状。第2类为块状小晶面初生碳化物M6C(Ni60A+WC含量大于30%),M6C中钨/铁元素的质量比大于5.29,形貌为…
In this work, we present a method to order low temperature (LT) self-assembled ferromagnetic In1−xMnxAs quantum dots (QDs) grown by molecular beam epitaxy (MBE). The ordered In1−xMnxAs QDs were grown on top of a non-magnetic In0.4Ga0.6As/GaAs(100) QDs multi-layered structure. The modulation of the chemical potential,…
水溶液環境における材料の腐食・防食挙動は電解質溶液の熱力学モデル，材料表面上の電気化学反応速度モデル，溶液と材料の界面における物質移動速度及び吸着モデルを用いたシミュレーションにより定量的に解析することができる．本稿では実在溶液安定領域線図を用いた熱力学平衡論的解析法，合成分極線図を用いた全面腐食速度の推算法，再不動態化電位を用いた被局部腐食性の評価法を取り上げ，具体的な検証事例を含めて紹介する．
Magnetic entropy is basically connected to freedom of magnetic moments or spins, and the discontinuity between the magnetically ordered and disordered states due to the first-order transition brings about large caloric changes. Meanwhile, the first-order transition in a real condition occurs within finite time, theref…
Процесс термического разложения нормального [Cu(H2O)(C4H2O4)] и кислого [Cu(H2O)4](С4H3O4)2 малеатов условно можно разделить на четыре стадии: 1) дегидратация, 2) полимеризация, 3) изомеризация малеат-иона в транс-форму с одновременным восстановлением Cu(II) Cu(I); 4) декарбоксилирование фумарата Cu(I); третья и четве…
A new wide viewing angle liquid crystal device was developed using PET technology.The liquid crystal molecule was twisted by double electric field.The rising time of the design with negative liquid crystal is slightly greater than the positive's,and the falling time is accordance with the positive liquid crystal.Compa…
The topic of an aircraft crash against a nuclear power plant building has received increasing attention during the last decade. VTT has carried out series of jointly funded and designed impact tests and also developed numerical methods and models with which this event can be analysed. In addition, simplified computati…
The mechanism and characters of diffraction radiation of subwavelength metallic grating structure are analysed and discussed.Using the three dimensinal particle-in-cell simulation,the contour map of electric field of the grating is obtained excited by moving electron bunch.Combined with the Brillouin diagram,it shows…