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放热峰     
相关语句
  exothermic peak
    The activation energy obtained from the IF peak is equal to that obtained from exothermic peak of DSC.
    另外,多个扫描速度所求出的DSC曲线上的晶化放热峰的表观激活能和内耗峰的表观激活能几乎完全一致。
短句来源
    Through the analysis of the effect of Silica on the thermal decomposition character of Ammonium Perchlorate(AP) by means of differential thermal analysis, we found that the exothermic peak of Ammonium Perchlorate(AP) doped with 5% SiO2, is 14.7 C earlier that the pure sample.
    运用差热分析法研究了SiO_2对高氯酸铵(AP)热分解性能的影响,结果表明,添加5%的SiO_2可以使AP的高温放热峰提前14.7℃。
短句来源
    An exothermic peak in DSC tracing was presented for glassy alloys Fe_(24)Zr_(76) and Ni_(24)Zr_(76), but two or three peaks for Co_(21)Zr_(79), Pd_(24.5)Zr_(75.5), Cu_(45)Zr_(55) and Cu_(67.5)Ti_(32.5).
    在Fe_(24)Zr_(76),Ni_(24)Zr_(76)合金玻璃体中呈现出一个放热峰,而Co_(21)Zr_(79),Pd_(24.5)Zr_(75.5),Cu_(45)Zr_(55)和Cu_(67.5)Ti_(32.5)则有两个或三个放热峰
短句来源
    The results showed that there were two endothermic peaks ( P 1,P 2 peaks) and one exothermic peak ( P 3 peak) in differential scanning calorimetry(DSC) curve during the first heating run and these peaks disappeared during the second heating run.
    结果表明在第一次升温测量的差示扫描量热(DSC)曲线上存在两个吸热峰(P1,P2峰)和一个放热峰(P3峰),再次升温测量时,这些峰均消失了。
短句来源
    In the DSC curve, the exothermic peak is caused by decomposing the template in 493.9K In addition, the exothermic peak in the temperature between 713K and 753K is formed because Ce3+ is oxidized into Ce4+ and that in829K may relate with phase transformation of alumina.
    在493.9K,730.6K和829K左右出现的放热峰分别是由模板剂分解,Ce3+发生氧化反应及Al2O3的相变引起的。
短句来源
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  exothermic peaks
    It was found that there are five exothermic peaks in the DTA curve of LPCNi3.55Co0.75Mn0.4Al0.3 alloy, named a-b-c-d-e in turn.
    城大母博士李位论文火加热过程中的变化,发现:在LPCNi3,55Co075Mn0.4AI众。 合金的DTA曲线上呈现出5个放热峰:a一b一c一d一e。
短句来源
    The DSC curves of the atomized powder has three or four distinct exothermic peaks, which indicates that the crystallization process of Al_(82)Ni_(10)Y_8 powder is multi-stepped.
    当连续升温时,Al82Ni10Y8雾化粉末的DSC曲线出现3~4个放热峰,Tg,Tx1表现出多级晶化现象。
短句来源
    On the other hand, when the energy of ball milling was high enough, the DTA curves of the samples consists of two exothermic peaks which corresponds to crystallization into Mg_2Ni, MgNi_2 phases, respectively.
    当样品的球磨能量较高时则出现二个放热峰,分别对应着Mg2Ni、MgNi2晶体相的生成。
短句来源
    In crystallization, three internal friction peaks are observed from 500℃ to 650℃ in correspondence with three exothermic peaks in DSC analysis, the shear modulus softens at the same time and the height of peaks is proportional to T/f.
    在晶化过程中,从500 ℃至650 ℃出现三个内耗峰与DSC分析的三个放热峰对应,内耗峰高与(?) /f,呈线性关系,在峰温附近切变模量发生软化。
短句来源
    With the hydrogen content increasing, both the glass transition temperature and the crystallization temperature slightly increase within certain extent, and some exothermic peaks weaken at different stages of crystallization.
    随着氢含量的增加,玻璃转变温度和晶化温度稍有提高,并使结晶过程不同阶段的放热峰变弱。
短句来源
更多       
  exothermal peak
    The Fe_(86)P_(14)grain growth is initiated above 745℃ with a steady exothermal peak on DTAcurve.
    温度超过745℃,Fe_(86)P_(14)进入晶粒长大阶段,出现平缓的放热峰.
短句来源
    At 100℃ its conductivity reaches a peak value3.0×10~(-2)(Ω.cm)~(-1),which corresponds to an obvious exothermal peak on its DTAcurve.
    当达到100℃左右时,电导率出现一个峰值达到3.0×10~(-2)(Ω·cm)~(-1)。 在差热图上对应于一个明显的放热峰
短句来源
    The results of DSC testing show that only one exothermal peak appears in the DSC curve for Sb Se based alloy. the corresponding temperature is about 220℃. However,two exothermal peaks appear in the DSC curve for alloys GeSb 2Te 4 and GeSb 4Te 4.The corresponding temperatures are 140℃ and 200℃ respectively,and there is a slight difference depending on the heating rate.
    利用DSC对Sb Se系和Ge Sb Te系粉末热力学参数进行了研究 ,对于Sb Se系合金 ,仅在温度为 2 2 0℃左右时出现一个放热峰 ,而对于GeSb2 Te4 与GeSb4 Te4 合金 ,分别在 140℃及2 0 0℃左右各出现一个放热峰 ,加热速度不同放热峰出现温度略有差别
短句来源
    A new exothermal peak is found on DTA cure at nearly 478 ℃ when bismuth and boron are added.
    从差热分析曲线可看到,随着B,Bi的掺入,在478℃附近出现了不同的放热峰
短句来源
  exothermal peaks
    The results of DSC testing show that only one exothermal peak appears in the DSC curve for Sb Se based alloy. the corresponding temperature is about 220℃. However,two exothermal peaks appear in the DSC curve for alloys GeSb 2Te 4 and GeSb 4Te 4.The corresponding temperatures are 140℃ and 200℃ respectively,and there is a slight difference depending on the heating rate.
    利用DSC对Sb Se系和Ge Sb Te系粉末热力学参数进行了研究 ,对于Sb Se系合金 ,仅在温度为 2 2 0℃左右时出现一个放热峰 ,而对于GeSb2 Te4 与GeSb4 Te4 合金 ,分别在 140℃及2 0 0℃左右各出现一个放热峰 ,加热速度不同放热峰出现温度略有差别
短句来源
    A comparison of the study on the crystallization of the glasses in argon with that in the air suggests that the second exothermal peaks are oxidation peaks.
    通过对该类玻璃在氩气氛和在空气中的晶化研究,说明第二放热峰是氧化峰。
短句来源
    DSC traces indicate that there exist two broad exothermal peaks for all samples, the first peak responds to the releasing of stored strain and the second to the decomposition of solid solutions.
    DSC曲线显示:Fe-Cu过饱和固溶体有两个宽的放热峰,第一个峰与应力释放对应,第二个峰对应固溶体分解。
短句来源
    With increase of the concentration of Pd additive, the minor exothermal peaks in front of main SHS reaction peaks decreased gradually until disappeared, whereas the SHS temperatures (T2) increased at first and then decreased lightly. The exothermal intensity of unit mass metal showed a decreasing tendency except an anomalous exothermal intensity for RuAlPd compound with about 3.0 % Pd additive.
    Pd的加入使RuAl自蔓延反应前的小放热峰逐渐减小,直至消失。 随着Pd含量的增加,RuAl自蔓延反应温度(T2)先升高后略有降低,自蔓延反应的激烈程度则有降低的趋势[除含约3%(原子数分数,下同)Pd化合物之外]。
短句来源

 

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      exothermic peak
    At absorpbed dose of 5 MGy the first exothermic peak is shifted by 15-20°C; in this case, both exothermic peaks coalesce and the oxidation can be considered as single-stage process starting at 110°C.
          
    DSC thermograms for the curing of C1P and C2P with benzoyl peroxide (BPO) and NMA/MTHPA showed two distinct exothermic peak positions, Tp and T1p, due to the curing of esterified fraction and epoxy groups, respectively.
          
    The results show that the supported Pd catalysts have two exothermic peaks at around 312 °C and 435 °C in the DSC thermograms, respectively, while the supported Pt catalysts have one exothermic peak at approximately 345 °C.
          
    Using DSC, the exothermic peak due to precipitation from the supersaturated α-Al matrix was observed in the range of 200-250°C during continuous heating of atomized powder, and the size of the peaks increased with decreasing powder size.
          
    Metastable phase with structure type of sigma phase (e.g., in Fe-Cr alloys) was observed in melt spun ribbons by rapid heating or annealing at temperatures below the first exothermic peak of DTA curve.
          
    更多          
      exothermic peaks
    In the derivatograms of the anion exchanger in the nitrate form there are one endothermic and two exothermic peaks (~100, 160-180, and 200-220°C).
          
    At absorpbed dose of 5 MGy the first exothermic peak is shifted by 15-20°C; in this case, both exothermic peaks coalesce and the oxidation can be considered as single-stage process starting at 110°C.
          
    The homogeneity of the product is correlated with the temperature of exothermic peaks above 1100 K due to the crystallization of MgTiO3, but not with the endothermic peaks around 650 K.
          
    During the thermal analysis, the cross-linked co-polymers exhibited two exothermic peaks and one endothermic peak, indicating the presence of HTPB and GAP polymeric chain segments in the co-polymers.
          
    During the baking of the dry-gel powder, two exothermic peaks occur, followed by the formation of Li2O and Co3O4 and then the combination of LiCoO2, which is testified by DTA and XRD.
          
    更多          
      exothermal peak
    The Raman spectra of Li2O · 7GeO2 glasses, which are heat treated under different conditions at temperatures near the temperature corresponding to the first exothermal peak in the DTA curve, are measured in the frequency range 20-1100 cm-1.
          
    We have found that there is an exothermal peak on the DTA curve of nanostructured γ-Fe2O3 sample and that this peak is not repeatable.
          
    The XRD microstructure analysis confirms for the first time that this exothermal peak corresponds to the structural phase transition from γ-Fe2O3 to α-Fe2O3.
          
    The DTA curve showed that boric acid treated basswood has an exothermal peak at 420°C, indicating the exothermal polymerization reaction of charring.
          
    DSC data show that prolonged exposure to UV light and post-thermal treatment can decrease the Tonset and Tpeak of the exothermal peak and the condensation temperature between TiOH, and increase ΔH of the exothermal peak.
          
    更多          
      exothermal peaks
    These exothermal peaks were very weak in unground V with various exchangeable cations.
          
    During continuous heating at the rate of 0.33 K sec-1 Al-15 at% Cr samples ball-milled for 800 and 1000 h showed two exothermal peaks.
          


    The glassy alloys, Zr_(1-x)M_x (M=Fe, Co, Ni, Cu and Pd) and Cu_(67.5)Ti_(32.5), were prepared by the melt spinning technique. Their critical tangential speed of the glassy state formation was determined to be 31 m/s by means of changing the tangential speed of rotator. Their structure in a glassy state of all alloy tested has been confirmed by X-ray diffraction analysis. Their thermal behaviour was examined by differential scanning calorimetry (DSC) under different heating rates. An exothermic peak in DSC tracing...

    The glassy alloys, Zr_(1-x)M_x (M=Fe, Co, Ni, Cu and Pd) and Cu_(67.5)Ti_(32.5), were prepared by the melt spinning technique. Their critical tangential speed of the glassy state formation was determined to be 31 m/s by means of changing the tangential speed of rotator. Their structure in a glassy state of all alloy tested has been confirmed by X-ray diffraction analysis. Their thermal behaviour was examined by differential scanning calorimetry (DSC) under different heating rates. An exothermic peak in DSC tracing was presented for glassy alloys Fe_(24)Zr_(76) and Ni_(24)Zr_(76), but two or three peaks for Co_(21)Zr_(79), Pd_(24.5)Zr_(75.5), Cu_(45)Zr_(55) and Cu_(67.5)Ti_(32.5). The activation energies for crystallization of these aUoys were evaluated by the Kissinger's method. Furthermore, the effect of heat of mixing on the formation and stability of these binary glassy alloys has been discussed after calculation used the Miedema's model.

    用熔融自旋技术制备了Zr_(1-x)M_x(M=Fe,Co,Ni,Cu和Pd)和Cu_(67.5)Ti_(32.5)合金玻璃体。用变换转鼓切线速度的方法,确定了上述合金形成玻璃态的临界切线速度为31m/s。所有合金玻璃体经X射线衍射分析证明为玻璃态结构。用示差扫描量热器,以不同的升温速率测量了它们的热行为。在Fe_(24)Zr_(76),Ni_(24)Zr_(76)合金玻璃体中呈现出一个放热峰,而Co_(21)Zr_(79),Pd_(24.5)Zr_(75.5),Cu_(45)Zr_(55)和Cu_(67.5)Ti_(32.5)则有两个或三个放热峰。用Kissinger技术确定了各个合金玻璃的结晶激活能。最后讨论了由Miedema模型计算的二元合金的混合热对合金玻璃体形成和稳定性的影响。

    The structure and crystallization on heating of the amorphous alloy Fe_(100-x)P_xduplicated film made by electrodeposition have been examined by DTA,TEM andX-ray diffraction.The observation on alloy Fe_(86)P_(14)which is approach to the eu-tectic composition of Fe-P system is shown as diffuse scattering ring pattern ofelectron diffraction and broadened peak of X-ray diffraction.The crystallization ofthe Fe_(100-x)P_(14)deposited film seems to be the processes of low temperature relaxa-tion,formation of supersaturated...

    The structure and crystallization on heating of the amorphous alloy Fe_(100-x)P_xduplicated film made by electrodeposition have been examined by DTA,TEM andX-ray diffraction.The observation on alloy Fe_(86)P_(14)which is approach to the eu-tectic composition of Fe-P system is shown as diffuse scattering ring pattern ofelectron diffraction and broadened peak of X-ray diffraction.The crystallization ofthe Fe_(100-x)P_(14)deposited film seems to be the processes of low temperature relaxa-tion,formation of supersaturated solution of α-Fe(P),precipitation of Fe_3P fromα-Fe(P)as well as formation of stable phases of α-Fe(P)and Fe_3P.The Fe_(86)P_(14)grain growth is initiated above 745℃ with a steady exothermal peak on DTAcurve.The initial temperature of crystallization of Fe_(100-x)P_x amorphous alloy in-creases and of precipitation of Fe_3P decreases with the increase of its P content.The initial crystallization temperature of Fe_(86)P_(14)is about 250℃.

    用电沉积法获得Fe-P非晶复层.用差热分析仪、透射电子显微镜及X射线衍射仪研究它的结构和加热晶化过程.Fe_(86)P_(14)含磷量接近Pe-P共晶成分,具有漫散环的电子衍射花样和宽化的X射线衍射蜂.Fe-P沉积层的晶化包括低温弛豫、形成过饱和固溶体.α-Fe(P),Fe_3P由α-Fe(P)脱溶及形成稳定相.α-Fe(P)和Fe_3P等几个过程.温度超过745℃,Fe_(86)P_(14)进入晶粒长大阶段,出现平缓的放热峰.Fe-P非晶合金晶化开始温度随磷量增加而升高,Fe_3P开始析出温度则下降.Fe_(86)P_(14)开始晶化温度约在250℃.

    The metallic glasses Ag_xCu_(50-x)Zr_(30) are prepared by an induction furnace followed by melt spinning in vacuum. It is found that amorphous alloys can be obtained in the range x<12. The glass transition temperatures Tg and the crystallization temperatures T_c of the metallic glasses Ag_xCu_(50-x)Zr_(50) with x = 2, 4, 6 and 10 are obtained. The activation energys E_n of crystallization are determined by the Kissinger method. It is shown that the bigger is the x in metallic glasses Ag_xCu_(50-x)Zr_(50), the...

    The metallic glasses Ag_xCu_(50-x)Zr_(30) are prepared by an induction furnace followed by melt spinning in vacuum. It is found that amorphous alloys can be obtained in the range x<12. The glass transition temperatures Tg and the crystallization temperatures T_c of the metallic glasses Ag_xCu_(50-x)Zr_(50) with x = 2, 4, 6 and 10 are obtained. The activation energys E_n of crystallization are determined by the Kissinger method. It is shown that the bigger is the x in metallic glasses Ag_xCu_(50-x)Zr_(50), the less stable is the glasses. A comparison of the study on the crystallization of the glasses in argon with that in the air suggests that the second exothermal peaks are oxidation peaks.

    采用高频熔炼后的真空单辊急冷技术制备了Ag_xCu_(50-x)Zr_(50)金属玻璃,发现在x<12的范围内都可得到完全的非晶态。测量了x=2,4,6和10的Ag_xCu_(50-x)Zr_(50)金属玻璃的玻璃转变温度和晶化温度,并采用Kissinger方法测定了晶化激活能E_a。发现在金属玻璃Ag_xCu_(50-x)Zr_(50)中,x值越大则玻璃越不稳定。通过对该类玻璃在氩气氛和在空气中的晶化研究,说明第二放热峰是氧化峰。

     
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