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A Study of Estimating the Safe Storage Life, Self-accelerating Decomposition Temperature and Critical Temperature of Thermal Explosion of Double-base Propellant Using Isothermal and Non-isothermal Decomposition Behaviours 被引量:1
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作者 Feng Qi ZHAO Hong Xu GAO +2 位作者 Rong Zu HU Gui E LU Jin Yong JIANG 《Chinese Chemical Letters》 SCIE CAS CSCD 2006年第5期667-670,共4页
A method of estimating the safe storage life (τ), self-accelerating decomposition temperature (TsADT) and critical temperature of thermal explosion (Tb) of double-base propellant using isothermal and non-isothe... A method of estimating the safe storage life (τ), self-accelerating decomposition temperature (TsADT) and critical temperature of thermal explosion (Tb) of double-base propellant using isothermal and non-isothermal decomposition behaviours is presented. For double-base propellant composed of 56±1wt% of nitrocellulose (NC), 27±0.5wt% of nitroglycerine (NG), 8.15±0.15wt% of dinitrotoluene (DNT), 2.5±0.1wt% of methyl centralite, 5.0±0.15wt% of catalyst and 1.0±0.1wt% of other, the values of r of 49.4 years at 40℃, of TSAOT of 151.35℃ and of Tb of 163.01℃ were obtained. 展开更多
关键词 Safe storage life self-accelerating decomposition temperature critical temperature of thermal explosion double-base propellant thermal accelerated aging test DSC kinetic parameters.
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Decomposition Temperature of Cold Seep Carbonate and its Relationship with Delta Carbonate 被引量:1
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作者 ZHAO Jing LIANG Qianyong +1 位作者 LEI Rui XIONG Yongqiang 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2016年第6期2271-2272,共2页
Delta carbonate (Delta C, AC) method is a commonly- used surface geochemical exploration method for petroleum surveys. Delta C holds that light hydrocarbon gases leak into near-surface soils or sediments from underl... Delta carbonate (Delta C, AC) method is a commonly- used surface geochemical exploration method for petroleum surveys. Delta C holds that light hydrocarbon gases leak into near-surface soils or sediments from underlying petroleum accumulations, then partly oxidized to CO2, resulting in a special carbonate precipitation, which is termed as Delta carbonate (△C). 展开更多
关键词 SOIL CCO decomposition temperature of Cold Seep Carbonate and its Relationship with Delta Carbonate
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Estimation of thermal decomposition temperatures of organic peroxides by means of novel local and global descriptors
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作者 DAI Yi-min NIU Lan-li +2 位作者 ZOU Jia-qi LIU Dan-yang LIU Hui 《Journal of Central South University》 SCIE EI CAS CSCD 2018年第7期1535-1544,共10页
The thermal decomposition temperature is one of the most important parameters to evaluate fire hazard of organic peroxide. A quantitative structure-property relationship model was proposed for estimating the thermal d... The thermal decomposition temperature is one of the most important parameters to evaluate fire hazard of organic peroxide. A quantitative structure-property relationship model was proposed for estimating the thermal decomposition temperatures of organic peroxides. The entire set of 38 organic peroxides was at random divided into a training set for model development and a prediction set for external model validation. The novel local molecular descriptors of AT1, AT2, AT3, AT4, AT5, AT6 and global molecular descriptor of ATC have been proposed in order to character organic peroxides’ molecular structures. An accurate quantitative structure-property relationship (QSPR) equation is developed for the thermal decomposition temperatures of organic peroxides. The statistical results showed that the QSPR model was obtained using the multiple linear regression (MLR) method with correlation coefficient (R), standard deviation (S), leave-one-out validation correlation coefficient (RCV) values of 0.9795, 6.5676 ℃ and 0.9328, respectively. The average absolute relative deviation (AARD) is only 3.86% for the experimental values. Model test by internal leave-one-out cross validation and external validation and molecular descriptor interpretation were discussed. Comparison with literature results demonstrated that novel local and global descriptors were useful molecular descriptors for predicting the thermal decomposition temperatures of organic peroxides. 展开更多
关键词 organic peroxide thermal decomposition temperature multiple linear regression model validation quantitative structure-property relationship
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Direct decomposition of nitric oxide in low temperature over iron-based perovskite-type catalyst modified by Ru
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作者 李丽 张密林 +3 位作者 袁福龙 史克英 张国 张丹 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2006年第5期568-570,共3页
Iron-based perovskite-type compounds modified by Ru were prepared through sol-gel process to study its catalytic activity of NOx direct decomposition at low temperature and evaluate the conversion of NO under the expe... Iron-based perovskite-type compounds modified by Ru were prepared through sol-gel process to study its catalytic activity of NOx direct decomposition at low temperature and evaluate the conversion of NO under the experimental conditions. The catalytic activity of La 0.9Ce 0.1Fe 0.8-nCo 0.2RunO3 (n=0.01,0.03,0.05,0.07,0.09)series for the NO, NO-CO two components, CO-HC-NO three components were also analyzed. The catalytic investigation evidenced that the presence of Ru is necessary for making highly activity in decomposition of nitric oxide even at low temperature(400 ℃)and La 0.9Ce 0.9Fe 0.75Co 0.2Ru 0.05O3 (n=0.05) has better activity in all the samples, the conversion of it is 58.5%. With the reducing gas(CO,C3H6)added into the gas, the catalyst displayed very high activity in decomposition of NO and the conversion of it is 80% and 92.5% separately. 展开更多
关键词 iron-based perovskite-type compounds catalyst modified by Ru direct decomposition of nitric oxide in low temperature catalytic activity
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A Study on the Properties of Resin Transfer Molding Cyanate Ester and Its T800 Grade Carbon Fiber Composites 被引量:5
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作者 Qiuren Ou Peijun Ji +1 位作者 Jun Xiao Ling Wu 《Fluid Dynamics & Materials Processing》 EI 2019年第1期27-37,共11页
The properties of resin transfer molding(RTM)cyanate ester and its T800 grade carbon fiber composites were studied with the rheometer,differential scanning calorimetry(DSC),FT-IR,dynamic mechanical analyzer(DMA),therm... The properties of resin transfer molding(RTM)cyanate ester and its T800 grade carbon fiber composites were studied with the rheometer,differential scanning calorimetry(DSC),FT-IR,dynamic mechanical analyzer(DMA),thermal gravimetric analysis(TGA),mechanical property testing,and scanning electron microscopy(SEM).The results showed that the temperature of cyanate ester suitable for RTM process was 70℃.Curing process of the resin was 130℃/2 h+160℃/2 h+200℃/2 h+220℃/4 h.Glass transition temperature and heat decomposition temperature of the cured resin are 289℃and 415℃,respectively.Mechanical properties of T800/RTM cyanate composites are 13.5%higher than that of T700/RTM cyanate composites and equal to that of T800/Prepreg cyanate composites.Tg of T800/RTM cyanate composites was proved to be 291℃.Fracture pattern of the composites was flat,which proved excellent interface properties between fiber and resin in this composite. 展开更多
关键词 RTM cyanate ester VISCOSITY glass transition temperature heat decomposition temperature mechanical properties
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Fabrication and Properties of (Y,Gd)BCO Superconductors 被引量:1
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作者 焦玉磊 肖玲 +1 位作者 任洪涛 郑明辉 《Journal of Rare Earths》 SCIE EI CAS CSCD 2004年第6期867-870,共4页
The microstructures and superconducting properties of melt textured(Y_(1-x)Gd_x)BCO bulk samples were studied. It was found that the peritectic decomposition temperature(T_m)of(Y_(1-x)Gd_x)BCO samples increases with i... The microstructures and superconducting properties of melt textured(Y_(1-x)Gd_x)BCO bulk samples were studied. It was found that the peritectic decomposition temperature(T_m)of(Y_(1-x)Gd_x)BCO samples increases with increasing x. Large single domain growth in air is readily obtained in all the composites. The results of X-ray distribution maps of x=0.4 composite indicate that the RE123 matrix is homogeneous and Y and Gd elements in the RE site forms a perfect solid solution. The onset T_c values exceeding 91 K with relatively broad transitions are obtained for almost all the samples. Magnetization measurements show no marked indication for the formation of a peak effect in the J_c-B curves, and the highest J_c measured is 3.08×10~4 A·cm^(-2) for x=0.4 sample at 77 K and self-field. The results clearly indicate that Y dominates the superconducting properties of x=0.2 and (0.4) composites. 展开更多
关键词 Y Gd)BCO SUPERCONDUCTOR melt processing peritectic decomposition temperature rare earths
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Prediction of Decomposition Temperature for Lanthanide Complexes Involving Cyclopentadienyl and Benzohydroxamic Acid Ligand by ANNs 被引量:1
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作者 孙益民 凌青 +2 位作者 万玉宝 王修然 宇海银 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2002年第10期996-999,共4页
The decomposition temperatures of the lanthanide organic complexes (η 5-C 5H 5) 2Ln(C 6H 5CONHO) involving cyclopentadienyl and benzohydroxamic acid ligands were calculated and predicted by the model based on A... The decomposition temperatures of the lanthanide organic complexes (η 5-C 5H 5) 2Ln(C 6H 5CONHO) involving cyclopentadienyl and benzohydroxamic acid ligands were calculated and predicted by the model based on ANNs (artificial neural networks) method. The comparison was carried out between results from ANNs method and traditional regression method. It is proved that ANNs could be used more efficiently for the prediction of decomposition temperature of lanthanide organic complexes. 展开更多
关键词 rare earth organometallic artificial neural network decomposition temperature
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