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1.
报导了由射频溅射制备稀土硅化物薄膜,样品的红外吸收光谱中,在865cm^-1有一个强吸收峰,而在462cm^-1有一个弱吸收峰。样品进行了高温退火后,强吸收峰基本没有变化,而弱吸收峰随退火温度的升高而增强,我们认为强吸收峰是YSi2的键振动吸收,而弱峰是YSi的键振吸收。  相似文献   

2.
高温热解聚硅烷制备SiC薄膜初探   总被引:1,自引:0,他引:1  
用组合成的可溶性聚硅烷1710A作涂膜材料,进行不同温度的真空热解或高纯氮下热解实验。通过IR谱和XPS谱分析,在790-810cm^-1和1270cm^-1红外吸收特征峰分别对应Si-CH3摇摆振动和伸缩振动吸收峰,XP-Si谱给出Si(2P)结合能力为101.6eV,CIS为284.3eV,证明有α-SiC:H生成。  相似文献   

3.
采用傅里叶变换红外光谱、差热分析等近代物理方法研究了抗癌药物顺式二氯二胺合铂的特性、结构以及构效关系.结果表明,cis-[Pt(NH3)2Cl2]熔解分为放热过程和吸热过程,放热峰为301.237℃,吸热峰为306.932℃.Pt-N伸缩振动频率在3300cm-1附近分裂成3300cm-1和3210cm-1两个吸收峰,在1300cm-1处分裂成1325cm-1和1300cm-1两个吸收峰.Pt-Cl伸缩振动峰在338cm-1.  相似文献   

4.
氮化碳薄膜的红外吸收光谱(FTIR)研究   总被引:2,自引:0,他引:2  
测量了采用RF-CVD方法制备的氮化碳薄膜的FTIR曲线,膜层中的C-N键、石墨相、C=N键和C≡N键的红外吸收峰波数分别为1250cm^-1,1576cm^-1,1687cm^-1和2054cm^-1。采用技术措施避免石墨相析出的氮化碳薄膜,其红外吸收谱只出现了C-N键的伸缩振动吸收峰(948cm^-1),薄膜中的其它功能基团的存在对C-N键的振动频率有一定的影响。  相似文献   

5.
对Hg系高Tc超导体(Mg0.8Mo0.2)Sr2(Y1-xCaxCu2O6+δ)的晶格振动进行了化分析,给出了该晶体在Γ点晶格振动的对称性分类。利用红外光声光谱结合喇曼散射研究了该系列样品的声子振动性质。实验结果表明,在喇曼光谱中主要出现145,320,440,57,592cm^-1几个特征振动峰。在中红外吸收光谱(光声光谱)中出现645cm^-1特征振动峰,而145,320,440,578,6  相似文献   

6.
研究了10MeV电子辐照掺SeGaAs外延层和半绝缘(SI)GaAs的Raman测量.观察了几个相关缺陷的特征,认为220cm-1峰与Asi相联系,这至少部份和EL2及EL12缺陷有关.对掺Se样品的204cm-1和258cm-1峰,可能和小砷簇的振动模式有关.而77cm-1和185cm-1峰则应是由无序活化Raman散射引起的.辐照结果显示,小砷簇和无序态随辐照剂量增加而增加.本文还将讨论其它的有关的Raman峰  相似文献   

7.
采用傅里叶变换红外光谱、差热分析等近代物理方法研究了抗癌药物顺式二氯二胺合铂的特性、结构以及构效关系。结果表明,cis-[Pt(NH3)2Cl2]熔解分为放热过程和吸热过程,放热峰为301.237℃,吸热峰为306.932℃。Pt-N伸缩振动频率在3300cm^-1附近分裂成3300cm^-1和3210cm^-1两个吸收峰,在1300cm^-1处分裂成1325cm^-1和1300cm^-1两个吸收  相似文献   

8.
根据分子振动理论,采用简化模型分析了Bi系高温超导体CuO2面内Cu O键振动的振动模式,计算了单一红外活性模Eu的振动频率·计算结果表明:CuO2面内Cu O键Eu模式伸缩振动的频率为6738cm-1,8032cm-1,弯曲振动的频率为412cm-1·计算结果中6738cm-1,412cm-1与Bi系高温超导体红外吸收光谱的实验分析结果较好吻合,8032cm-1与实验分析结果中800cm-1附近归属尚未确定的吸收峰峰位比较接近·  相似文献   

9.
根据分子振动理论,采用简化模型分析了Bi系高温超导体CuO2面内Cu-O键的伸缩振动模式,计算了相应于各振动模式的振动频率,并将理论分析结果与实验结果进行了分析,分析结果表明Bi系高温超导体CuO2面内Cu-O键的伸缩振动模式有拉曼活性模A1g,B1g和红外活性模Eu,其中拉蔓模A1g,B1g的振动频率分别为126.3cm^-1和573.6cm^-1,与实验确定的Bi系高温超导体Cu-O键伸缩振动  相似文献   

10.
离子注入形成FeSi2埋层的电镜研究   总被引:4,自引:0,他引:4  
利用MEVVA离子源将Fe离子注入到Si基体中会生成一层铁硅化物薄膜.利用电子显微镜,研究了这层铁硅化物的显微结构及其在随后的升温退火过程中发生的变化.研究结果表明,在离子注入剂量为1×1017/cm2的未退火样品中,亚稳的γ-FeSi2相占大多数,同时有少量的由CsCl结构派生的缺陷相Fe1-XSi.在(100)取向的Si片上,这个硅化物层埋在硅基体中,形成了厚度为25nm左右的埋层(buriedlayer)结构  相似文献   

11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

12.
The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.  相似文献   

13.
王慧 《科技信息》2008,(10):240-240
Wuthering Heights, Emily Bronte's only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.  相似文献   

14.
The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3~4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰~ -7.8‰, PDB) and matrix dolomites (-6.6‰~ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084~0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078~0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.  相似文献   

15.
Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.  相似文献   

16.
以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.  相似文献   

17.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。  相似文献   

18.
Quality traits in wheat (Triticum aestirum L.) were studied by quantitative trait locus (QTL) analysis in a recombinant inbred line (RIL) population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross (ChSh). Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.  相似文献   

19.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.  相似文献   

20.
赵英华 《科技信息》2008,(12):219-220
0.Preface China has long been boasting of its colorful and immense culture which comprises of Taoism,Confucianism and Buddhism.The interwoven influence among the religions on Chinese way of thinking,on the nation's behavior in their social life throughout the long history is beyond list.  相似文献   

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