放热

The results of calculation show that the reaction of SiH insertion into HF is thermodynamically dominant at low temperature and kine tically favored at high t...

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，且服从Arrhenius定律。

According to the analysis of thermogenic curves, shortened lag phase of bacteria growth, increased growth rate constant and maximum heat power were observed in the presence of Pr(superscript 3+) in low concentration and the results indicated that the growth of E. coli was promoted.

从生成的热谱图分析可以看出，低剂量的稀土离子Pr(上标 3+)的存在可以缩短细菌的停滞期，增加生长速率常数和最大放热功率，刺激大肠杆菌的生长。

The results show that the atmosphere has a big influence on the thermal stability of C_(60).C_(60) begins to decompose at 423.5℃in the air,the deomposed peak temperature is 668.5℃,but very stable in the helium atmosphere,only sublimate,the crystal shape of C_(60) has a certain influence to its thermal stability.The synthesized nine kinds of nitro-fullerene derivatives all have good thermal stability and their decomposed peak temperatures all exceed 350℃.The thermal explosion temperature for 5 seconds delay of product 4 is 253℃.The category,number and position of nitryl group in nitro-fullerene derivatives all have influence on their thermal stability.

利用差热分析仪和DSC-TG综合热分析仪对C_(60)及其硝基衍生物的热稳定性进行了研究，结果表明，环境气氛对C_(60)热稳定性影响很大，C_(60)在空气中423.5℃开始分解，放热峰值温度为668.5℃，在氦气中很稳定，仅表现为升华，C_(60)的晶型对其热稳定性也有一定的影响；合成得到的九种硝基富勒烯衍生物都具有较好的热稳定性，分解峰值温度均高于350℃；产物4的5秒爆发点测试结果为253℃。

Typical for a nonpolar gas, it is poorly soluble in water but soluble in nonpolar organic solvents.

六氟化硫是个极为惰性的气体，不与水、盐酸、氢氧化钠和熔融的钠作用，但会与金属锂反应并放热。

Initiator is one of the most important reagents in the polymerization of olefin and it closely related to the polymerization rate.

引发剂是烯烃聚合的重要助剂，聚合反应速率与之密切相关；引发剂的不同直接影响聚合反应时间和聚合放热的均匀性。

XRD results showed that the fabricated Si-SiC composites were composed of α-SiC,β- SiC and Si. The polytype of SiC was related to the reaction-heat during the sintering.

XRD结果表明Si-SiC复相陶瓷的主晶相为α-SiC，β-SiC和游离Si，不同晶型SiC的出现与试样烧结过程中Si/C反应的放热过程有关。

XRD results sho wed that the fabricated Si-SiC composites were composed of α-SiC,β- SiC an d Si. The polytype of SiC was related to the reaction-heat during the sintering .

XRD结果表明Si-SiC复相陶瓷的主晶相为α-SiC，β-SiC和游离Si，不同晶型SiC的出现与试样烧结过程中Si/C反应的放热过程有关。

The experimental results show that the content of SiC in RBSC increases with carbon content while α-SiC is chosen as a filler. However, the residual carbon would appear in specimens when the carbon content exceeds 30% by weight. Using carbon felt, the reaction-formed SiC particles are small and uniform in size and distribution. However, when carbon felt is impregnated with phenol resin, the reaction-formed SiC is nonuniform in size and distribution. X-ray diffraction shows that the fabricated RBSC is composed of α-SiC,β-SiC, and free Si. The polytype of SiC is related to the reaction-heat during sintering.

结果表明：选用α-SiC+C粉的混合物作为生坯，SiC相的体积分数随生坯中wC的增加而增加，但过大的wC将使硅化后的试样出现残碳；选用碳毡作为生坯，反应烧结碳化硅的显微组织特点是C／Si反应生成的碳化硅颗粒均匀细小，并呈线状分布在游离硅中；浸渍过树脂的碳毡硅化处理后的显微组织特点是反应生成的碳化硅颗粒粗大且呈不均匀分布。X射线衍射结果也表明，反应烧结碳化硅陶瓷由游离Si、α-SiC、β-SiC组成，试样中不同晶型碳化硅的出现与C／Si反应的放热过程有关。

Experimental study of high temperature phase transformation for pyrophyllite

利用场发射扫描电镜表征了Zr-Co粉体的形貌特征和烧结后的陶瓷薄膜结构，热重分析了Zr-Co粉体烧结过程的失重和相转变吸放热过程，X射线衍射分析跟踪了不同温度段烧结体系的组成变化趋势，在此基础上对粉体烧结后陶瓷薄膜的防氧化效果进行了分析，结果表明：温度对粉体的颗粒形貌和晶相结构有较大的影响，高温烧结的粉体性质稳定，经过1200℃烧结后的陶瓷膜层具有很好的致密性，具有很好的防氧化效果。

Using the analysis of differential scanning calorimetry, three exothermic peaks were found which were mainly attributed to crystallization of α-(373℃), relaxation of internal strain (410℃) and crystallization of the residual amorphous matrix (540℃) respectively.

对机械合金化形成的非晶〓的DSC测量表明：在40℃到700℃范围内，有三个位于373℃，417℃和540℃左右的放热过程，分别α-相的结晶，内应变的降低和残余非晶相的晶化。

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。