放热

A large drop in hardness appears in as deformed samples at a temperature 45 ℃ lower than the start temperature of the exothermal peak after isochronal annealing, indicating that the recrystallization and grain growth process is closely relatine to annealing time and temperatur.

出现明显晶粒长大的温度较DSC曲线显示的放热峰起始温度低45℃左右，这主要是由于变形组织的回复再结晶过程是退火温度与时间的函数，降低处理温度并延长处理时间能达到与高温短时处理相同的效果。

In the highheating rates, Al nanopowders were heated above 560℃rapidly, and then the oxidize shellcracked and combusted due to the fusion of the core part Al. This oxidation process wasacute, and had only one phenomenon of exothermal and mass gain.

在高加热速率下，纳米铝粉温度迅速被加热到560℃以上，芯部的铝熔化造成氧化铝壳层的破裂燃烧，氧化反应剧烈，仅有一次放热和质量增重现象。

DSC analysis found that the behavior of PSPI-TM film containing TiO〓of 12% was greatly different from that of the corresponding ester-typePSPI film. An intense exothermal change was found on the DSC curve. TGAanalysis indicated that the curve for weight loss of the PSPI-TM film wouldnot reach a platform until 400℃.

DSC热分析表明含TM基于转化后PI的重量折算为12 ％(w／w的Ti〓的PSPI光刻胶膜的热转变行为不同于相应的酯型PSPI光刻胶膜，在300℃附近有一个很强的放热过程；TGA分析表明这种含TM的光刻胶膜直到400℃以上才达到&失重平台&。

The test shows that the bed temperature is gradually reduced along the height of furnace in case of lower volatile matter content in the coal sort,but the temperature of returned material is obviously en- hanced;the bed temperature is entirely increased in the event of increasing the load,but the temperature difference be...

试验表明，煤挥发分含量较低时，床温沿炉膛高度逐渐降低，但返料温度明显升高；负荷提高，床温整体升高，但炉膛底部与中部的温差减小；一次风量增加，会导致烟气从密相区带走的热量大于燃烧放热而使床温降低。

An investigation on the local heat transfer coefficient of a helically segmented finned tube surface in a tube bundle was conducted by experiment in cooperation with numerical calculation.

对齿型螺旋肋片管管束内部沿管表面周向的局部放热系数进行了研究。

The performace of material was tested by DSC,XRD,SEM,EIS and charge-discharge cycles . The influences of various synthesized condition , sintering time and the amount of F were studied and correlative technics parameter to improve performance of material were optimized. DSC shows that three endotherimc peaks and one large exothermic peak are observed in the temperature range 150-400℃, which is because of the removal of water,the decomposition of the organic constituents and the formation of spinel. Only the citrate precursor is sintered at least 450℃, the crystallinity of spinel phase could be formed intactly.

通过DSC、XRD、SEM、EIS和充放电循环等手段对材料进行性能测试，比较了不同合成温度、烧结时间和不同掺杂元素量等条件对材料性能的影响，优选出提高材料性能的相关工艺参数， DSC表明，采用溶胶-凝胶-络合法制备的前驱体在150-400℃中有三个小的吸热峰和一个大的放热峰，这是前驱体中的水分、柠酸酸及其盐和醋酸及其盐在蒸发及分解，柠檬酸前驱体至少需在450℃以上才可能形成完整的尖晶石材料。

The isosteric enthalpy of adsorption, free energy, and entropy of adsorption were evaluated.

分别计算了热力学参数吸附焓、自由能、吸附熵，结果表明，此吸附过程是放热和自发的，吸附速率受颗粒内扩散和化学反应等因素的共同控制。

The calculation results show that the SiH insertion reaction into HCl is thermodynamically dominant at low temperature and kinetically favored at higher temp...

该反应在研究的温度范围内是一放热、熵减少的反应，反应的速率常数随温度的升高而增大，而且服从Arrhenius定律。

To assess the thermal contribution from oxidation reaction, the standard formation enthalpes of all reactants and products were used to calculate the oxidation enthalpies. It could be found that all oxidation reactions were exothermic. And oxidation played a more important role during the toluene trinitration at high temperature, because the reaction temperature of toluene trinitration is the higher than mononitration and dinitration, and the temperature coefficient of oxidation is higher than that of trinitration too.

为了考察不同阶段氧化副反应对反应放热的贡献，用反应物和产物的标准生成焓推得氧化反应的理论反应热，计算结果表明，各段硝化的氧化副反应均为放热反应，其中三段硝化反应由于反应温度最高，氧化反应的温度系数比硝化反应高，故氧化副反应对三段硝化影响最大。

The heat release calculation by external condensation of horizontal multitube, vibration check while media transversely flow over tube bundle, ensemble rigidity pipe bundle and connecting technology of tube and tube plate ware presented in this paper.

介绍了大型加热器的水平式多管排管外冷凝放热计算、介质横向流经管束时的振动校核、整体刚性管束以及管子与管板的连接工艺。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。