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放热峰
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  exothermic peak
    The exothermic peak at 940℃ for the formation of 3C_2S·3CaSO_4·CaF_2 appears after an endothermic valley at 910℃ corresponding to eutcetic point.
    在940℃形成3C_2S·3CaSO_4·CaF_2时的放热峰是位于在910℃共熔物熔融时吸热谷之后。
短句来源
    the results show that the position of exothermic peak and endothermic peak of main crystalline Will also be defferent.
    结果表明,随Ta_2O_5取代La_2_3其主结晶相的放热峰或吸热峰的位置变化不同,所析出的结晶物质亦不同。
短句来源
    The first sharp exothermic peak appeared at about 984℃ represented the formation of δ-Al_2O_3.The very weak endothermic peak appeared at about 1240℃ represented the formation of α-Al_2O_3.The second sharp exothermic peak appeared at about 1337℃ also represented the formation of mullite.
    1240℃弱的吸热峰为-δA l2O3向α-A l2O3转化峰,该过程比较缓慢; 1337℃强的放热峰为莫来石形成峰,发生在-δA l2O3与S iO2之间。
短句来源
    The results show that Li_ 005CoO_2 reaches to exothermic peak at 2718℃ with a total heat generation of 15755J/g. In general, the heat generation and main exothermic peak temperature of Li_xCoO_2 are increasing with x decreasing.
    结果表明,LixCoO2的放热量和主放热峰温度随x值减小而增加,Li0.05CoO2在271.8℃达到放热峰,总放热量高达1575.5Jg。
短句来源
    Later, by the study of the author, it is identified that the temperature of the carbonaceous kaolinite has reached to 1000℃, almost to that needed to form Al-Si spinel near the exothermic peak of kaolinite.
    后来经笔者研究,肯定为炭质高岭石粘土因受煤自燃已煅烧至1000℃左右,即相当于高岭石放热峰附近所产生硅铝尖晶石的阶段。
短句来源
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  exothermal peak
    At first exothermal peak temperature of 820℃,it is found that a surface-induced crystallization is dominated and anorthite(CaAl2Si2O8)as major phase and wollastonite(CaSiO3)as minor phase are precipitated.
    在第一放热峰温度(820℃)析晶时,玻璃样品为表面析晶,析出晶体为钙长石(CaAl2Si2O8)和硅灰石(CaSiO3)。
短句来源
    The exothermal peak in the differential scanning calorimetry (DSC) curves for ultrafineZrO, and ultrafine Y,O,--ZrO, is formed by crystallization of ZrO, or Y:O,--ZrO,from amorphous to tetragonal crystallites.
    ZrO_2及Y_2O_3-ZrO_2在差示扫描量热(DSC)曲线上400~500℃间出现的放热峰对应其由无定型向四方晶系的转化。
短句来源
    (2)The high-temperature phase related with the exothermal peak near 980℃ should be γ-Al2O3 rather than Al-Si spinel.
    ②980℃放热峰后的高温相是γ-AlO3而不是Al-Si尖晶石;
短句来源
  “放热峰”译为未确定词的双语例句
    It seems that the alloy tier begins to crystallizeand the Ni3P phase separates out, the corrosion- resisting properties of Ni-P and its alloy tier increasewith Phosphoric.
    高合P量的合金层在350℃左右时,差热曲线上出现-尖锐的放热峰,即合金层开始品化,析出Ni_3P相; Ni—P合金层随含P量的升高,耐蚀性增强。
短句来源
    The as-deposited coating was composed of γ-Al_2O_3 and amorphous SiO_2. The DTA curve has four peaks.
    该涂层由-γA l2O3和非晶S iO2组成,其DTA曲线有四个典型峰,793℃弱的放热峰为开始莫来石化峰;
短句来源
    2. Controls and mechanisms of chemical admixture on initial hydration of HPCWRA promote the first peak primarily due to the increase of wetting heat, but the second peaks in hydrated temperature curve are retarded and weakened.
    2.研究化学外加剂对高性能水泥水化的调控及其作用机理减水剂促进第一放热峰的增长,第一放热峰增强的主导因素是减水剂促进了湿润热的释放。 减水剂对第二温峰具有延峰、削峰作用,延缓了C_3S和C_2S的水化。
短句来源
    The effect of Si 3N 4 doping on repressing the crystallization of chalcogenide glasses is found valid for all three systems which is obviously attributed to the changes in crosslinking degree of glass microstructure due to introduction of nitrogen atoms.
    试验结果表明,随着Si3N4的引入,硫系玻璃的析晶温度得以提高或伴随析晶放热峰的消失。 这表明氮原子的引入加强了硫系基玻璃微观结构的连缀度,使硫氮玻璃的析晶能力有所下降。
短句来源
    When the concentration of acetic acid is increased, the crystallization temperature decreases, and the structure of microcrystals is transformed from disorder into order and crystallite becomes regular tetragonal system.
    醋酸浓度增大 ,晶化峰顶温度降低 ,晶化放热峰向低温移动。 热处理温度升高 ,微晶结构从无序向有序转变 ,同时晶粒由不规则形状变成规则的四边形态
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.
      
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  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.
      
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C.W. Brindley et al. (1959) considered the principal crystalline phase in the exothermic reaction of clay mineral kaolinite at about 980℃ as Al-Si spinel(2Al_2O_3·3SiO_2 or 3Al_2O_3·2SiO_2) and pointed out that the Al-Si spinel is similar to that of γ-Al_2O_3, and it is possible to mistake it for r-Al_2O_3 in case of inaccurate measurement. F.C. Loughnan et al.(1981) found that the kaolinite flint clay may transform into mullite and christobalite during the self-burning of coal in New South Wales, Australia,...

C.W. Brindley et al. (1959) considered the principal crystalline phase in the exothermic reaction of clay mineral kaolinite at about 980℃ as Al-Si spinel(2Al_2O_3·3SiO_2 or 3Al_2O_3·2SiO_2) and pointed out that the Al-Si spinel is similar to that of γ-Al_2O_3, and it is possible to mistake it for r-Al_2O_3 in case of inaccurate measurement. F.C. Loughnan et al.(1981) found that the kaolinite flint clay may transform into mullite and christobalite during the self-burning of coal in New South Wales, Australia, while in the low temperature zone metakaolinite occurs. They also considered that the above fact was discovered by themselves. But, the formation of the Al-Si spinel was not ascertained. Ma Jinping, Ba Qinglian, Jing Kigui and the author(1982 ) observed, near a highway in Hequ County, Shanxi Province, that carbonaceous clay has been whitened by scorching during the self-burning of coal within carboniferous coal series. Later, by the study of the author, it is identified that the temperature of the carbonaceous kaolinite has reached to 1000℃, almost to that needed to form Al-Si spinel near the exothermic peak of kaolinite. It is very concordant as compared with the data obtained by G. W.Brindley, and that of the exothermic peak of kaolinite. The appearance of the samples resembles with the kaolinite clay heated up to 1000℃.Theyare white, soft with micropores, slightly rough and staining fingers easily. They are also dark in luster and not viscous. The data from X-ray of a powder photo(Jeney photo, 10 hours)are as follows, 1.9673(?)(strong), 1.3919(?)(verystrong), 1.140(?)(weak)in width. All of the curves of different thermal analysis and those of dehydration are straight lines. The result of chemical analysis is similar to that of the dehydraed kaolinite. The content of impurities is 4.69%, A/S=0.902. Grainular texture and micropores are shown under the scanning electronic microscope. The result of infrared spectrum analysis is the same with that of the reaction of Suzhou's kaolinite heated up to 1000~1100℃(Chen Jingyan 1963), and 1300~960cm~(-1) wide peak shows the curve of the elastic vibration of (Si—O)—Si; 804cm~(-1) shows the vibration of Si—O—Al, and 469cm~(-1) shows the vibration of Si—O.The burned clay is always associated with a small amount of mullite. This resembles the reaction of kaolinite heated up to 1000℃ but is different from halloysite heated up to 1000℃(no mullite). Sometimes a small amount of halloysite (7(?)) is formed by rain action.

粘土矿物高岭石在980℃左右放热反应的主要结晶相被G.W.Brindley(1959)确定为硅铝尖晶石(2Al_2O_3·3SiO_2)。并指出硅铝尖晶石和γ-Al_2O_3的X射线数据很相似,若不作仔细测量易把它误认为是γ-Al_2O_3。F.C.Loughnan等(1981)研究Australia New South Wales高岭石硬质粘土因煤层自燃而受热,转变为莫来石与方石英,其低温带则产生变高岭石,并说这是有文献记载的第一次。但他们却没有肯定硅铝尖晶石的生成。笔者于1982年与马晋屏、巴庆廉、井喜贵等同志在山西省河曲县公路边的上石炭统煤系地层中,发现因煤自燃而使炭质粘土有灼烧变白的现象。后来经笔者研究,肯定为炭质高岭石粘土因受煤自燃已煅烧至1000℃左右,即相当于高岭石放热峰附近所产生硅铝尖晶石的阶段。并与Brindley等的资料及有关高岭石放热峰的数据进行了对比,完全相符。 样品外观与用人工法,使高岭石粘土加热至1000℃左右时的物料一样,白色、松软有微孔隙、无滑感稍粗糙、易染手、光泽暗淡、无粘性。其X射线粉末照相(Jeney相机,10h)数据为:1.9573(?)宽(强)...

粘土矿物高岭石在980℃左右放热反应的主要结晶相被G.W.Brindley(1959)确定为硅铝尖晶石(2Al_2O_3·3SiO_2)。并指出硅铝尖晶石和γ-Al_2O_3的X射线数据很相似,若不作仔细测量易把它误认为是γ-Al_2O_3。F.C.Loughnan等(1981)研究Australia New South Wales高岭石硬质粘土因煤层自燃而受热,转变为莫来石与方石英,其低温带则产生变高岭石,并说这是有文献记载的第一次。但他们却没有肯定硅铝尖晶石的生成。笔者于1982年与马晋屏、巴庆廉、井喜贵等同志在山西省河曲县公路边的上石炭统煤系地层中,发现因煤自燃而使炭质粘土有灼烧变白的现象。后来经笔者研究,肯定为炭质高岭石粘土因受煤自燃已煅烧至1000℃左右,即相当于高岭石放热峰附近所产生硅铝尖晶石的阶段。并与Brindley等的资料及有关高岭石放热峰的数据进行了对比,完全相符。 样品外观与用人工法,使高岭石粘土加热至1000℃左右时的物料一样,白色、松软有微孔隙、无滑感稍粗糙、易染手、光泽暗淡、无粘性。其X射线粉末照相(Jeney相机,10h)数据为:1.9573(?)宽(强);1.3919(?)宽(很强),1.140(?)宽(弱)。差热分析曲线与脱水曲线均呈直线状。化学分析结果与较纯的高岭石熟料很相似,杂质总含量4.69%,A/S=0.902。扫描电镜下多呈粒状结构及微细孔隙。红外吸?

Both 2C_2S·CaF2 and 2C_2S·CaSO_4 form after C_2S does, 3C_3S·CaF_2 forms slowly and a little CaS0_4 can stop it from forming. The exothermic peak at 940℃ for the formation of 3C_2S·3CaSO_4·CaF_2 appears after an endothermic valley at 910℃ corresponding to eutcetic point. Pure 3C_2S·3CaSO_4·CaF_2 melts at 1225℃, and when to add in Al_2O_3+ Fe_2O_3 or Al_2O_3+ Fe_2O_3+ MgO, the 3C_2S·3CaSO_4·CaF_2 does at the 1180℃ and 1160℃ respectively. At the existence mineralizer, the liquid phase appears at lower temperature,...

Both 2C_2S·CaF2 and 2C_2S·CaSO_4 form after C_2S does, 3C_3S·CaF_2 forms slowly and a little CaS0_4 can stop it from forming. The exothermic peak at 940℃ for the formation of 3C_2S·3CaSO_4·CaF_2 appears after an endothermic valley at 910℃ corresponding to eutcetic point. Pure 3C_2S·3CaSO_4·CaF_2 melts at 1225℃, and when to add in Al_2O_3+ Fe_2O_3 or Al_2O_3+ Fe_2O_3+ MgO, the 3C_2S·3CaSO_4·CaF_2 does at the 1180℃ and 1160℃ respectively. At the existence mineralizer, the liquid phase appears at lower temperature, and the fluidity correspondingly increases, and tke content of free-CaO decreases obviously. The reason that mineralizer promotes the formation of C_3S at lower temperature is not due to the formation of intermediate phase, but duc to the fluxing effect of mineralizer.

2C_2S·CaF_2与2C_2S·CaSO_4均在C_2S之后形成。3C_3S·CaF_2形成缓慢而困难,少量CaSO_4即可阻止其形成。在940℃形成3C_2S·3CaSO_4·CaF_2时的放热峰是位于在910℃共熔物熔融时吸热谷之后。有Al_2O_3+Fe_2O_3与Al_2O_3+Fe_2O_3+MgO时,过渡相的开始熔化温度由1225℃降至1180和1160℃。加入矿化剂后,液相出现温度降低,其流动性相应增大,游离石灰含量显著降低。矿化剂促进C_2S低温形成不在于其形成过渡相,而在于其助熔作用。

In this paper, glass forming region in system B_2O_3—La_2O_3—CaO is described. Experimental results indicate that the glass forming region is shifted to poor-B_2O_3, rich-La_2O_3 region with increasing the component of Ta_2O_5,When component of Ta_2O_5 equals to 10 wt% the glass forming region is maximum. Crystalline temperature of glass and glass crystalline have been determined with DTA and X—ray. the results show that the position of exothermic peak and endothermic peak of main crystalline Will also be defferent....

In this paper, glass forming region in system B_2O_3—La_2O_3—CaO is described. Experimental results indicate that the glass forming region is shifted to poor-B_2O_3, rich-La_2O_3 region with increasing the component of Ta_2O_5,When component of Ta_2O_5 equals to 10 wt% the glass forming region is maximum. Crystalline temperature of glass and glass crystalline have been determined with DTA and X—ray. the results show that the position of exothermic peak and endothermic peak of main crystalline Will also be defferent.

本文研究了在B_2O_3—La_2O—CaO三元系统中,当Ta_20_5的含量分别为5、10、15、20wt%时,该系统的玻璃生成范围。结果表明,随着Ta_2O_5含量的增加,系统的玻璃生成范围向贫B_2O_3,富La_2O_3边界扩充。当Ta_2O_5的含量为10wt%时,玻璃的生成区域最大。通过差热分析确定了玻璃析晶温度,并用X射线衍射进行了物相鉴定。结果表明,随Ta_2O_5取代La_2_3其主结晶相的放热峰或吸热峰的位置变化不同,所析出的结晶物质亦不同。

 
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