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The positions of the obtained peaks correspond to the tetragonal rutile structure of SnO₂ [17].
Moreover, this trend highlights the impact of controlling the oxygen percentage on the film’s structure.
The additional oxygen, by bonding to Sn sites in the crystal lattice, allows for the release of more electrons into the structure, thereby increasing the carrier density [28].
As the oxygen concentration in the sample increases, the oxygen vacancies, which are defects in the crystal structure, tend to decrease.
Brytan, “Structure and Selected Properties of SnO2 Thin Films,” 2024

It is concluded that formation of the research area is caused by mechanical compaction, pressure-solution, cementation and dissolution, etc. 1.4.1 The effect of mechanical compaction and pressure solution Strong mechanical compaction and pressure solution are one of the main factors of weak pore structure.
In the research area of the Chang 2 reservoir, its dissolution effect develops and the dissolved components are: (1) clastic particles, such as feldspar, mica and unstable rock debris. (2) mixed clay, mica, water mixed layer clay and lime coagulation, etc. (3) the raw cement, such as turbidity zeolite, calcite, dolomite, calcite, dolomite, iron and iron. (4) replacement mineral, such as laumonite, calcite and analcites, etc. 1.5 Structure type of the reservoir pore According to the analysis by all means of the casting thin sections and scanning electron microscope, porosity in the Chang 2 reservoir are inter-particle and dissolution pores intergranular dissolution pores.
Pore throat structure mainly includes mesopore-fine throat, mesopore-micro fine throat and aperture-micro throat, the pore structure and its combination are controlled by sedimentation and diagenesis, and obvious change can be observed in the profile and plane distribution of Chang 2 reservoir [2]. 1.6 Reservoir sensitivity analysis According to the acid sensitivity test of 15 rock samples in Chang 2 reservoir, the test result shows that this area is acid-sensitive.
The reasons for the well congestion By analyzing the deposit feature, reservoir properties, pore structure and other features in this area, we can conclude that Dingbian Oilfield is typical in low pressure, low permeability, low-yield, the “three lows" fractured reservoirs, so weak reservoir properties, low pressure, low temperature and areolate throat are the main factors the oil production is damaged by different operations, congestion in near wellbore reservoir affects the normal production wells reducing fluid production and oil production.
[3] Swartzen-Allen S L, Matijevic E.Surface and colloid chemistry of clays.

Galalith can be also interpreted as the substitute for the use of natural protein structures, such as tortoise shells and bovine horns, in a plasticized form, which was equally diffused at the time [18].
Materials originated from nature can be lignocellulosic, such as it the case with plant fibers (from bast, leaf, fruit, seed, bark, roots of a vegetable structure) [39] or more definitely polysaccharidic, such as it is the case with algae or mucilage [40], but also with crustaceans’ shells [41]; proteinic, such as it is the case with animal fibers, such as silk, wool, feathers, horns, etc., or mineral, such as it is the case with calcium carbonate structures obtained from shells, or calcium phosphate structures, obtained from fish bones [42], etc.
Mülhaupt, Green polymer chemistry and bio‐based plastics: dreams and reality.
In: Structures Congress 2010 (pp. 1051-1062)

The UFA's effects attribute to figuration effect, activation effect and tiny aggregation effect during cement hydration[2]: (1)The figuration effect of UFA is named the effect resulted from its physical properties such as particle shape, internal structure, surface nature and grain size distribution, etc. (2)The activation effect of UFA represents the reaction ability between fly ash's activation component such as SiO2, Al2O3 and alkali activator Ca(OH)2, and these reactions can produce C-S-H gel and C-A-H crystal. (3)The tiny aggregation effect of UFA represents that UFA can even distribute in cement paste phase and looks like tiny aggregation.
However, anhydrous CaSO4 crystal could hydrate spontaneously after open piling, and its crystal structure changes to needle, flake and plate structure from original granular structure, the particle growing larger and the strength developing.
We can use them into concrete to improve the concrete's interface structure and increase the concrete's strength and performance.
[5] The Seventh International Cement Chemistry Session Memoir (China Architectural Industry Publishing House, 1985).

IN PARTICULAR, ANODE MATERIALS SELECTION AND DESIGN ARE MAINLY FOCUSED ON STRUCTURES WITH BIOCOMPATIBILITY, DURABILITY, AND DESIGNS IN FAVOR OF POROSITY AND LARGE SURFACE AREA [2, 4, 10-13].
The Fused Deposition Modelling (FDM) of 3D printing is a versatile technique allowing rapid prototyping of tailored structures and is readily applied for polymer-based thermoplastic materials (PLA, ABS).
This is attributed to a lower boundary effect occurring due to larger layer height, and thicker and bulkier structures due to fewer layers for the same specimen dimensions.
We have recently shown the effect of temperature on the features of 3D-printed structures [22].
These results open a new way of utilizing FDM technology in shaping and treating custom-made anodes in MFCs leading to the concept of modular structures in MFC technology.

Then the scanning electron microscope (SEM) was used to observe the micro-morphological structure of sintering section.
After adding inhibitor, as shown in Figure 9, the degree of melting deposition is further strengthened, dense sintered in microstructure, particles closely connected into a solid structure in the molten phase and the surface is smoother.
So it can not showing in the XRD spectrum which use the lattice structure to determine the phase.
The main mechanism should be: the inert particles with high melting point diffusing in sedimentary facies so as to cut off the bond between particles, so the ash layer continuity is reduced, thereby reducing the structure strength of heating surface sediments.
Zhang: Journal of Fuel Chemistry and Technol0022ogy, Vol. 28(2000), p.420(in Chinese) [4] GX.Q Ma, Z.Y.

All the peaks were found to match closely with that of β-SiC; - cubic β-SiC crystal structure with lattice parameters; a=4.358, b=4.358, and c=4.358 with a space group F-43m (216) which was identified as the main phase.
Figure 7 SEM scan (surface) of SG84 after 110-hour of isothermal oxidation (insert – surface structure before oxidation) – (b) pore, (c) micro-crack, (d) prismatic mullite and (d) porous Al2O3 Figure 8 SEM scan (Surface) of SG79 after 110-h of isothermal oxidation (insert – surface structure before oxidation) – (b) pore, (c) micro-crack, (d) prismatic mullite and (d) porous Al2O3 Figure 9 SEM scan (surface) of SG 76 after 110-hour of isothermal oxidation (insert – surface structure before oxidation) – (b) pore, (c) micro-crack, (d) prismatic mullite and (d) porous Al2O3 Figure 10 SEM scan (surface) of SG 72 after 110-hour of isothermal oxidation (insert – surface structure before oxidation) – (b) pore, (c) micro-crack, (d) prismatic mullite and (d) porous Al2O3 Prismatic mullite grains were observed on almost all the surfaces of the coatings as seen in Figures 7(d), 8(d), 9(d) and 10(d).
Thomas (Eds.), Essentials of Carbon-Carbon Composites, The Royal society of chemistry, 1993, pp. 204 -227
Sarin, Structure and high-temperature stability of compositionally graded CVD mullite coatings, International Journal of Refractory Metals and Hard Materials, 19 (4-6) (2001) 467-477

The wettability of solid surfaces is influenced by some major factors like homogeneity, chemical composition, and surface structure [29, 30].
Nataraj, Electrospun nanofibers, nanocomposites and characterization of art: Insight on establishing fibers as product, Nano-structures and Nano-Objects, 16 (2018) 45–58
Xue, Flexible membranes with a hierarchical nanofiber/microsphere structure for oil adsorption and oil/water separation, Journal of Industrial and Engineering Chemistry, 68 (2018) 416–424
Lim, “Porous Silica Particles as Oil Absorbents: Comparison of Meso-, Macro-, and Meso/Macro-Structures,” Bulletin of the Korean Chemical Society, 36 (7) (2015) 1751–1757
Jiang, Electrospun porous structure fibrous film with high oil adsorption capacity, ACS Appl.

Novel Synthetic Clays for Cation Exchange Tatsuya Kodama1, a , Nobuyuki Gokon1,b and Sridhar Komarneni2,c 1 Department of Chemistry & Chemical Engineering and Graduate School of Science & Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi 2-nocho, Niigata 950-2181, Japan 2 Department of Crop and Soil Sciences and Materials Research Institute, The Pennsylvania State University, University Park, PA, 16802, USA a tkodama@eng.niigata-u.ac.jp, bngokon@eng.niigata-u.ac.jp, ckomarneni@psu.edu Keywords: Ion exchanger, Synthetic Clay, Mica, Hazardous Cation Separation, Fixation of Radionuclides Abstract.
As a result, Na-4-mica allows its structure to expand from a dehydrated 9.81 Å to a hydrated 12.18 Å c-axis spacing or d001 to achieve a more thermodynamically stable interlayer structure.
(b) [A] (a) z12.18 [A] z Fig. 1 Schematic structures of (a) anhydrous and (b) hydrated Na-4-micas.
In the hydrated structure, two layers of water molecules are incorporated on either side of the central plane of the interlayer space [4].
Strontium became trapped into a more conventional trioctahedral brittle mica structure similar to the barium interlayered mica, kinoshitalite, Ba2(Mg, Mn,Al)6Si4Al4O20(OH, F)4 [19], which is an extremely stable phase because the high coulombic forces that span the interlayer region effectively hold it very tightly closed.

Bao et al. (2010) also reported that the specific surface area and pore structure of the activated carbons of different bamboo species.
The average pore diameter was computed based on the assumption that the structure of the pore is cylindrical.
It is thought that pore apertures constrict at high temperatures owing to the gradual thermal transformation of the carbon structure.
Zhong, The comparative study on pore structure of activated carbon from different bamboo species, J.
Boehm, Some aspects of the surface chemistry of carbon blacks and other carbons, Carbon 32 (1994) 759-769