热化学

Our process capability: Plates: FR4, High TG FR4, high CTI FR4, high frequency materials, halogen-free materials, aluminum and other low-rise Materials :2-20 layer of finished copper thickness :0.5-5 OZ finished thickness: 0.2 -6.0mm Minimum line width: 3mil Minimum line spacing: 3mil smallest shape tolerances:+/-0.1mm minimum finished diameter: 0.1mm maximum thickness aperture ratio: 12:1 wide minimum solder bridge: 4mil characters minimum line width: 5mil Minimum height of characters: 30mil Solder Mask Color: Green, black, blue, white, yellow, purple characters such as color: white, yellow, black and other surface processes: spray tin, lead-free HASL, Electroless gold plating Shuijin, OSP, chemical Shen tin, silver and other chemicals Shen Process: Goldfinger, blue gum, Blind-via/Buried-via, characteristic impedance control, rigid-flexible combination of reliability testing such as: Open / Short testing, impedance testing, solderability testing, thermal shock testing, metallographic analysis of micro-slice curvature Isoptera: 0.7% flame retardant Level: 94V-0

我们公司的制程能力：板材：FR4、高TG FR4、高CTI FR4、高频材料、无卤素材料、铝基材料等层数：2-20层成品铜厚：0.5-5 OZ成品板厚：0.2-6.0mm最小线宽：3mil最小线间距：3mil最小外形公差：+/-0.1mm最小成品孔径：0.1mm最大板厚孔径比：12：1最小阻焊桥宽：4mil最小字符线宽：5mil最小字符高度：30mil阻焊颜色：绿色、黑色、蓝色、白色、黄色、紫色等字符颜色：白色、黄色、黑色等表面工艺：喷锡，无铅喷锡、化学沉金、电镀水金、OSP、化学沉锡、化学沉银等其它工艺：金手指、蓝胶、盲埋孔、特性阻抗控制、刚柔结合等可靠性测试：开/短路测试、阻抗测试、可焊性测试、热冲击测试、金相微切片分析等翅曲度：≤0.7%阻燃等级：94V-0

SiC ceramic has been extensively applied in precision bearings, sealing element, steam-turbine rotor, burner nozzle, heat interchanger parts, atomic reactor materials and etc. because of its excellent properties in high temperature mechanical properties, antioxidatio, abrasion resistance, thermal stability, smaller coefficient of thermal expansion, larger thermal conductivity, hardness, thermal shock and chemical corrosion.

SiC陶瓷具有优良的高温力学性能，抗氧化性强、耐磨损性好、热稳定性佳、热膨胀系数小、热导率大、硬度高以及抗热震和耐化学腐蚀等优良性能，被广泛应用于精密轴承、密封件、气轮机转子、燃烧喷嘴、热交换器部件及原子热反应堆材料等，并日益受到人们的重视，应用前景十分广阔。

In this paper, nanopowders of rare earth oxides and tungsten were prepared and 0-3 type nano-composit rare earth tungsten thermionic emission materials were fabricated with novel technics. The raw material selection, preparation technic parameter, structure, physical and chemical characteristic, the rare earth distribution and the emission behavior were studied. The influence between the active layer and the thermionic emission performance, rare earth elements diffusion and distribution along depth were investigated in detail. The surplus RE formation and the electron transfer were discussed in theoretically. The thermionic emission current density of the single surplus RE on the active layer was educed. We adopted "liquid-liquid mixing, freeze-drying and two stage-reduction" working step firstly to produce the RE-W nanopowders including La-W powder, Ce-W powder and Y-W powder.

本文采用细化显微组织的新工艺，制备了纳米稀土钨粉末和0-3型纳米复合稀土钨热电子发射材料，探讨研究其原料选择、制备工艺及参数、结构特征、物理和化学特性、稀土分布均匀性、以及热电子发射特性；系统研究了稀土元素的高温扩散情况、高温状态下活性层中稀土的纵向深度分布、以及表面活性物质和活性层厚度对热发射性能的作用；从理论上分析阐释了超额稀土的形成及其电子的传递过程；并从理论上推导了活性层中单个超额稀土的热电子发射电流密度。

Bis(3,4-dicarboxy-phenyl) hexafluropropane dianhydride (6FDA)/pyromellitic dianhydride and m-phenylene diamine, and then a post-azo-coupling reaction of p-Nitrophenyldiazonium fluoborate toward the arylamine ring of PAAs.

首次对侧链型PI极化膜的热光性能展开研究，探讨化学结构和聚集态结构对其热光系数及其偏振依赖性的影响规律，寻求控制和优化热光性能的方法。

Silver behenate nanocrystals with a diameter of 50~100nm, were first prepared by chemical precipitation in a water tert-butyl alcohol mixed solvent.

本文详细考察了影响山嵛酸银晶体生长的因素，研究了山嵛酸银晶体的形成机理，首次通过化学沉淀法在水-醇混合溶剂中制备出粒径为50~100nm的山嵛酸银晶体，进一步研究了山嵛酸银的热行为以及热分解机理，考察了山嵛酸银纳米晶体在热敏成像体系及制备银薄膜方面的应用。

In this paper, a series of polysiloxanes crosslinked by tetraethyl orthosilicate, polyurethanes crosslinked by trimethanol propane, and polyurethane/polysiloxane IPNs were synthesized at the existence of catalyst at room temperature.

用FTIR研究了聚硅氧烷、聚氨酯和IPN的化学结构和固化反应动力学，用TG-IR联用技术研究了聚硅氧烷、聚氨酯和IPN的耐热性及在无氧条件下的热裂解产物、热分解反应动力学和热分解机理。

In the thesis, a series of novel single and multi-armed oxadiazole bridging ligands and pyridyl-4, 5-imidazole dicarboxylic acid ligands have been synthesized. The coordination chemistry of these novel ligands with transition metal ions was investigated. In addition, two 1, 3, 4-oxadiazole bridging ligands end-capped by chelating Schiff-base coordination sites have been designed and synthesized. The coordination chemistry based on one of the two ligands with metal ions was primarily investigated.

本文报道了一系列新颖的含1， 3， 4-Oxadiazole杂环的单臂及多臂有机配体，研究了它们与过渡金属离子的配位反应化学；合成了吡啶基-4，5-咪唑二羧酸有机配体，研究了它们在水热条件下与过渡金属离子的配位反应化学；另外，还合成了1， 3， 4-Oxadiazloe杂环桥联的双Schiff-base有机配体，初步探讨了其与过渡金属离子的配位反应化学。

The changes in the weight, exponential, structure of the tissue, cell apoptosis in testis and epididymis and the changes in the sperm tectology in epididymis were measured on the day 8, 13, 21 and 35 of the treatment,respectively,by the method of morphological examination.

分别在热应激持续到8d、13d、21d和35d时，应用形态学观察法，研究受试鼠睾丸和附睾重量及指数、组织结构、细胞凋亡和附睾精子形态学的变化；应用免疫荧光细胞化学和蛋白质印迹分析的方法，研究睾丸和附睾组织中热休克蛋白70(HSP70)的表达；应用比色法检测睾丸和附睾组织内活性氧和丙二醛、抗氧化物酶(SOD、GSH-Px、CAT)的活力或浓度的变化；应用交配试验，检测雄鼠受精能力及其致孕雌鼠的产仔数的变化，用以揭示热应激对雄鼠生殖机能的影响。

The dynamics equations of soil water vaporizing and ammonia volatilizing hcluding the factors of water and temperature, and the dynamics-like equation of urea transforming into ammonium nitrogen in soil are founded in the paper, by taking the effect of interaction of water and temperature as subject, the dynamic change character of object studied as basis and using principle of chemical dynamic; The empirio-equations of soil water retention curve including temperature and the empirio-equations including temperature between water potential of millet seedling leaves and soil water are founded in order to make the equation of relation between water potential and water content in soil suit the demand of temperature change much better.

本文以水热耦合效应为主题，基于研究对象的动态变化特征，应用化学动力学原理，建立了含水、热因子以及水热耦合效应的土壤水分蒸发、肥料氨挥发动力学方程，以及施入土壤中的尿素转化为铵态氮的动力学型方程；为使水势—含水量关系式更好适应变温条件应用的要求，建立了含温度因子直接表征土壤持水曲线的经验方程，以及含温度因子的谷苗叶水势与土壤含水量关系经验方程。

Three thermal degradation subzones analysis methods, the whole pyrolysis zones, the main compounds pyrolysis zones, and the active and passive pyrolysis zones, were applied.

采用了生物质整体热解分区、生物质化学组分热解分区、活化热解与消极热解分区等三种热解分区方法进行分析。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。