Search results

It is then heated 5 °C per min to 800 °C andkept for 3 hr to form a carbon structure.
The crystallographic structure of the carbon material was determined by X-ray Diffraction(XRD) analysis.
Fourier Transform Infrared Spectroscopy (FTIR) studieson the porous carbon confirmed the presence of several oxygenated functional groups and evidence for its surface chemistry and chemical reactivity in the context of supercapacitor applications.
Journal of Molecular Structure, 700, 175. https://doi.org/10.1016/j.molstruc.2003.12.057 [13] R.
Journal of Molecular Structure, 1196, 429. https://doi.org/10.1016/j.molstruc.2019.06.098 [15] G.

Information from related phenomena, such as crystallization of hexagonal structure snowflakes and metamorphic graphite, as well as of diamond cubic structure silicon crystals in aluminum alloys is incorporated in the analysis.
Graphite has a layer-structured of graphene layers in which the carbon atoms are arranged in a honeycomb lattice.
Silicon crystallizes with a face-centered diamond cubic structure.
JIMM 55(9) (2014) 1500-1505. ] also concluded that the internal structure of flake graphite consisted of thin layers of graphite platelets arranged in a “mosaic-like” structure, which is the tiled-roof configuration.
Room-temperature structure of chunky graphite.

While sometimes being belittled, the importance of visual inspection in general and especially for the assessment of engineering structures has been highlighted, among others, by [9].
There are also some observations of cracks, some of which seem to be related to the limestone structures and were described in [5].
Additionally, some of these features can be useful as visible evidences of situations that could be related to defects in the structure.
Lea, The Chemistry of Cement and Concrete, Edward Arnold Pub., 1970

Influence of Doping Methods on the Gas-sensing Properties of CuO-SnO2 Sensors Zhi-dong Lin1, a*,Wen-long Song1, Han-min Yang2, b and Ju-cheng Zheng3,c 1 Provincial Key Laboratory of Plasma Chemistry & Advanced Materials, Wuhan Institute of Technology, Wuhan 430074; PR China 2Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, South-Central University for Nationalities, Wuhan, 430074, PR China 3 Lanzhou Petrochemical Research Center, PetroChina, Lanzhou 730060, PR China azhidong.lin@126.com, byanghanmin@sina.com, czhengjucheng@petrochina.com.cn, * correspondence autor Keywords: Gas-sensing; Doping methods; CuO-SnO2; Nanoparticles Abstract：Nano crystalline SnO2 was prepared by sol-gel with PEG surfactant.
The spectra for SnO2 correspond to cassiterite structures (joint Committee on Powder Diffraction Standards, JCPDS, card nos. 41-1445) without any indication of other crystalline byproducts.
CuS is a metallic conductor and when CuO is converted to CuS on exposure to the reducing H2S gas–air mixture, band structure of pure SnO2 will be restored and p–n junctions will be destroyed, the electrical resistance leads to drastic decrease and hence to the extremely large H2S sensitivity.
[11] Bruker AXS, Topas V2.0: general profile and structure analysis software for powder diffraction data, user manual.

Metroke et al. used EIS and salt spray analysis to determine the corrosion protective properties of hybrid organic–inorganic coatings on 2024-T3 aluminum alloys [12]; hydrolysis water ratio, organic content, and curing mechanism were found to affect the structure and corrosion resistance properties of the investigated Ormosil thin films [13].
The structure of the ormosil film was observed by scanning electron microscopy (SEM) and their thickness reported as an average of eleven measurements as measured using a digital Elcometer 456 coating thickness gauge.
Good adhesion, homogeneous structure and free crack coating can be a reason for increasing corrosion resistance of two layers specimens.
[18] John comyn, adhesion science, The Royal Society of Chemistry, 1-120, (1997)

To meet those requirements, firstly the polymeric binder components should have a minimum of these elements and as simple a chain structure as possible.
Secondly, since most engineering plastics have a wide range of decomposition temperatures up to 500 °C [17], the polymer must be carefully chosen by the factors such as polymer structures, molecular weights, crystallinity and impurities.
PEGs are water soluble and nontoxic with a simple structure, -(CH2CH2O)-.
Horrocks, Polymer degradation and the matching of FR chemistry to degradation, in: C.A.

Structured and patterned thin silicon film has also been achieved with the aid of the Smart-Cut technology [9].
Aspar and Maleville et al. [2,14] found that depending on their sizes, bonding flaws arising mainly from particle contamination could cause different damage to the SOI structure.
Bengtesson [15] concluded that quality of wafer bonding relied on the surface micro-roughness, wafer dimensions, ambient pressure and surface chemistry.
Thus, to some extent, bonding flaws degrade the quality of the final SOI structure when splitting.

Their chemistry should then depend on microsegregation build-up and, in turn, their precipitation will affect the composition of the remaining liquid.
The inter-reticular distance calculated from the distance between the circles corresponds to the cubic structure of the MgO oxide.
Zone c corresponds to well-crystallized graphite, and iron particles (in black contrast) are crystalline, as confirmed by the diffraction pattern seen in (d) which corresponds to [111] axis zone of ferrite that also presents a cubic structure.
Laffont, Structure of graphite precipitates in cast iron, Carbon 96 (2016) 1120-1128.

The structure was investigated by X-ray diffraction (XRD, Shimadzu XRD-7000 Maxima).
Figure 2a shows layered structures with flakes which is a characteristic of MMT.
Figure 2c-e showed exfoliated structures at all citrate concentration.
Russian Chemistry Review (2008): 233

Fly ash, slag powder and phosphorus slag powder are the main admixture of concrete, they can improve the fluidity of slurry and the interface structure between mortar and aggregate in concrete, the strength and durability of concrete are also improved.
Si-O, P-O and quadridentate Al-O were the network formers in the vitreous body structure of phosphorus slag, but Ca 2+、Mg 2+、Na + and sexadentate Al3+ were the network modified ions.
Compared with slag, phosphorous slag had more network former, so it had more firm vitreous body structure and lower activity.
Paulini, A weighing Method for Cement Hydration. 9th international congress on the chemistry of cement[C], New Delhi, India(1992) p.248-254 [6] M.