Materials Literature
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카본나노튜브(CNT)와 폴리아닐린(PANI)과 같은 도전성물질의 서스펜션을 함유한 마이크로캡슐이 멜라민과 포름알 데히드의 in situ 중합법에 의해 제조되었다. 평균직경 10-20 μm의 안정된 마이크로캡슐이 관찰되었으며, 이 마이크로 캡슐의 표면 모폴로지와 화학구조, 열적특성을 광학현미경, 주사전자현미경(SEM), 적외선 분광분석(FT-IR), 열중량분 석(TGA) 등으로 측정하였다. 테트라클로로에틸렌과 아이소파 G (isopar-G) 및 CNT나 PANI로 구성된 도전성물질 서스 펜션을 함유한 마이크로캡슐의 전기전도도를 캡슐벽을 깨뜨린 후 측정하였다. 마이크로…
There is a growing interest in developing supercapacitors for the use of energy storage. The current challenge is to develop a supercapacitor that has an energy capacity comparable to traditional batteries, while retaining the fast charging benefits of capacitors. The objective of this research project is to develop a…
Capillary forces in the pressure infiltration process can be quantified by measuring saturation curves; these are plots of the fraction pore space filled with the liquid infiltrant versus the pressure difference between the liquid and the atmosphere initially present in the porous preform to be infiltrated. We present…
Introduction Coarse powders of low-melting metals can be produced by spraying the molten metal, for example, commercial tellurium (m.p. 449 °C) is commonly prepared by this technique. Owing to the fast cooling step involved in this preparation method, the resulting tellurium solid drops have a polycrystalline structur…
In this work, we fabricate a carbon-based nanocomposite using poly(vinyl alcohol) filled with graphite nano platelets with a very fast and scalable process. Then, we investigate the electrical properties of the nanocomposite and the piezoresistive response of a strain sensor.
Este é um projeto I&D interno do INEGI, com as unidades DPS e LOME, que tem em vista a utilização de componentes disponíveis no INEGI para o estudo de um equipamento capaz de efetuar soldaduras por Friction Stir Welding. O equipamento já conta com controlo numérico para um sistema de três eixos e os respetivos motores…
Historically, adhesion research related to energetic materials has been focused on examining the interaction between explosive crystals and the substrate of interest. However, this neglects the effects of the binder material in compounds such as Composition C-4. These types of explosives are actually agglomerates comp…
利用高压DSC（HP-DSC）研究了Na2O-Al2O3-SiO2-H2O体系中生成水化石榴石的反应动力学。采用微分方程法对DSC曲线进行了分析,得到了该反应的动力学参数。结果表明,水化石榴石生成反应的表观活化能为191.17kJ/mol,指前因子为2.767 3s-1,其反应机理为随机成核和随后生长,并符合Mample单行法则。
Synthesis, Characterization, and Formation Mechanism of Nanoparticles and Rods of 1,5-Bis(2-Halophenyl)Penta-1,4-Dien-3-One For the first time nano sized particles of 1,5-bis(2-bromophenyl) penta-1,4-dien-3-one (I) and 1,5-bis(2-flourophenyl)penta-1,4- dien-3-one(II) were synthesised by facile reverse microemulsion ro…
本文利用顶部籽晶熔融织构的方法成功地生长出掺杂不同含量的a-Fe203粉末的单畴GdBazCus07-δ超导块材，并对掺杂后的GdBa2Cu3O7-δ块材的临界电流密度、捕获磁场、微观结构等进行测量和分析．掺杂a-Fe203粉末的摩尔比z分别为x=0，0．1，0．2，0．4，0．8mol％（x为a-Fe203粉末相对于GdBa2Cu3O7—δ的摩尔比）．我们发现在超导块材中掺杂a-Fe203粉末之后，块材的临界电流密度Jc和捕获磁场强度相对于未掺杂的块材有了明显的提升，这说明a-Fe2O3粉末作为第二相引入的确能够改善超导块材的性能．值得注意的是，a-Fe203掺杂量x=0．1mol％时，不降低临界转变温度（93．5K）的同时临界…
By continued advances in mechanical strength of press hardened boron alloyed steel (22MnB5) weight savings can be achieved by the use of less material. However, with reduced material thickness stiffness problems such as buckling arises and the high strength of the material can’t fully be taken advantage of. A solution…
采用完整热力学平衡分析验证了自愈合相BxC的产物是温度和初始气体摩尔比的函数。结果表明,凝聚相的成分与温度和气体的摩尔比（如BCl3：（BCl3＋CH4）、H2：（BCl3＋CH4））密切相关。BxC的理想沉积条件是：BCl3：（BCl3＋CH4）之比为0.8,H2：（BCl3＋CH4）之比在10-105.2之间,而温度应高于950 K。材料的富碳或者富硼主要通过调整BCl3：（BCl3＋CH4）和H2：（BCl3＋CH4）的气体摩尔比来控制。
International audience
介绍了一种新型的电凝聚A/O-MBR,以油页岩废水为研究对象,与普通A/O-MBR比较,考察了污泥驯化期反应器中的污泥特性和微生物种群变化,讨论了曝气量和温度对油页岩干馏废水中COD和氨氮去除效果的影响。结果表明：电凝聚A/O-MBR的MLVSS为3 243 mg/L,高于普通A/O-MBR的2 679.5 mg/L,说明电场和铁离子能刺激微生物增殖。整个驯化阶段的优势种群主要为有机物降解菌和异养脱氮菌。电凝聚A/O-MBR中生物多样性指数较高,且发现了与铁代谢相关的Fusibacter、Clostridium和Enterococcus,以及有电化学活性的Ferruginibacter等特有菌群。曝气量为0.2 m~3/h,温度为…
对Al2O3-SiC-C质浇注料分别进行110℃、300℃和500℃预处理,然后采用喷涂工艺在其表面制备氧化锆涂层,借助光学显微镜和SEM研究氧化锆涂层对Al2O3-SiC-C质浇注料的抗氧化性和抗侵蚀性的影响。研究表明：经300℃预处理,采用喷涂工艺喷涂一次,Al2O3-SiC-C质浇注料的抗氧化性和抗侵蚀性较好。
Mo(CO)2(NC5H10)4 (NC5H10=piperidine) was supported on funtionalized MCM-48 using post-synthesis method with [3-(2aminoethylamino)propyl] and trimethoxysilane as anchoring and passivation ligands respectively. The catalyst obtained was characterized with infrared spectroscopy (IR-FT), mass spectrometry (MS), thermograv…
利用柔性酚胺类配体N,N′-二甲基-N,N′-（2-羟基-4,5-二甲基苄基）乙二胺（H2L）与Cu（Ⅱ）反应,合成了2个新的酚氧桥联多核Cu（Ⅱ）配合物[Cu II3（L）2（CH3OH）2]（Cl O4）2（1）,[CuII3（L）2（CuICl2）2]（2）。配合物1~2中,3个Cu2＋之间通过2个酚氧桥连接,形成线性三核结构。两边的铜离子分别被配体L2-上的N2O2螯合配位,轴向与甲醇分子的氧（配合物1）或[Cu Cl2]-的氯（配合物2）配位,形成四方锥配位构型。中间铜离子与两侧L2-上的4个酚氧原子以平面四边形配位。Cu II-O-Cu II键角为100.14°~101.79°。对配合物1~2进行变温磁化率测量表明,铜…
We choose 8-hydroxyquinoline derivative-metal complexes（Beq,Mgq,and Znq） as the acceptors（A） and 4,4’,4-tri-（2-methylphenyl phenylamino） triphenylaine（m-MTDATA） as the donor（D） respectively to study the existing energy transfer process in the organic ultraviolet（UV） photodetector（PD）,which has an important influence o…
研究典型中温嗜酸菌株Acidithiobacillus ferrooxidans ATCC 23270对两种不同形态单质硫（α-S8和μ-S）的利用和硫形态转化。A.ferrooxidans分别在α-S8或者μ-S中培养以适应能源底物。A.ferrooxidans在这两种单质硫中的生长和硫氧化行为的结果表明,A.ferrooxidans在α-S8中生长时比在μ-S中生长晚1 d进入对数期,但是A.ferrooxidans在α-S8中生长时在对数期生长较快且培养液具有较高的细胞浓度和较低的p H值。经过A.ferrooxidans的培养,这两种单质硫都被明显腐蚀和细胞修饰。此外,经过A.ferrooxidans的生长,无定型态的μ-…
本文以四种不同Mo含量的Ti（C,N）基金属陶瓷为研究对象,通过组织观察、孔隙率测定、抗弯强度、硬度测试方法研究了Mo含量的变化对Ti（C,N）-Ni金属陶瓷组织和性能的影响,试验结果表明：Ti（C,N）基金属陶瓷呈现典型的芯-环结构,随Mo添加量增加,晶粒发生明显细化,抗弯强度及硬度增加。通过电化学测试方法,如动电位极化、交流阻抗曲线测定（EIS）、静态浸泡腐蚀试验等方法,结合腐蚀形貌观察,研究了不同Mo含量对Ti（C,N）基金属陶瓷在0.2 mol/L H2SO4溶液中的电化学性能和腐蚀性能的影响规律。含有Mo的Ti（C,N）-Ni金属陶瓷的极化曲线存在两个钝化区,其中一个为＂伪钝化＂区,随Mo元素含量增加,其维钝电流密度减小…