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China 2 Department of Chemistry, Tsinghua University, Beijing 100084, P.R.
In the present paper, therefore, 0.67PMN-0.33PT powders with single-phase perovskite structure were synthesized successfully by molten salt method, the powders as prepared were characterized by XRD and SEM.
The crystal structure of the PMN-PT powders was determined using X-ray diffraction with CuKα radiation (λ = 0.15405 nm) at room temperature over the angular range of 10° ≤ 2θ ≤ 70° by step of 0.02°.
While for the CMO, stable pyrochlore phase Pb3Nb4O13 was produced firstly, which had high apparent activation energy and was difficult to transform into perovskite structure [13].
This indicated that lattice constant of PMN-PT varied small and their structure tended to perfect as the increasing of temperature.

Because our hypothesis focus on the structure, we simplified the simulation systems, which we only build single-phase-graphite structure for all three environmental temperatures.
Nolze, POWDER CELL - a program for the representation and manipulation of crystal structures and calculation of the resulting X-ray powder patterns.
Rellick, Carbon and Graphite Matrices in Carbon-Carbon Composites: An Overview of their Formation, Structure, and Properties. 1992
Briddon, Structure and energetics of the vacancy in graphite.
Physical Chemistry Chemical Physics 1 (1999) 5277-5290

These indicate that the structure of showerhead gas delivery system has very significant influence on the process uniformity.
The realization of improving the gas flow uniformity of the showerhead is better designing the inlet structure in a conventional way.
But we convince that it can obtain a perfect gas flow uniformity and make the structure simpler that remove the baffle plate or perforated plate at the inlet and optimize the holes geometry configuration on the showerhead face plate.
An infinite variety of combinations of the holes structure and density can meet a certain impedance profile, such as adjustment of the holes by changing the diameter or pattern or topology or the combinations of the three kinds of methods.
Plasma chemistry and plasma processing, 2004. 24(2): p. 307--323

College of Chemistry and Environmental Science, Hebei University, Baoding, 071002,China 2.
POSS-epoxy acrylate was synthesized as follows: first the POSS epoxy resin (POSSER) was synthesized according to reference [4], which structure as Fig.1.
Fig.1 Structure of 2,3-Glycidyloxypropyl-POSS Fig.2 DSC curves of the adhesive cured at different heating rates Table 2.
The curing structure of the anaerobic adhesive system is as shown in Fig.4.
As seen from Fig.4, in this curing structure, the role of POSSEA as a cross-linked center, it will increase the cross-linking density of adhesive and improve the heat resistance.

Ecosystem health is a stable and sustainable state of ecosystem, which maintains the complete structure of its organization, self-regulation and its resistance or resilience to external pressure over time.
Initially, ecosystem health focused on ecosystem vigor, organization structure, and resilience.
Generally, Ecosystem health contains the following meanings: a system activity or energy is the symbol of ecosystem vigor; the organization of a system refers to the quantity and diversity of interactions among the components of the system; the capacity to maintain its structure and function or to recover from stress is regarded as the resilience of a system; The more healthy ecosystem is, the more services ecosystem provides; To keep itself health, a system presses harm on another one; Changes of the state of system affect human health directly or indirectly [9].
Researchers set up new models that reserve the major structure of PSR model and basic principle, such as SPR (State-Pressure -Response), DSR(Driving-Force-State-Response), PSRP(Pressure-State-Response-Potential), DPSIR (Driving Force-Pressure-State-Impact-Response), DPSRC(Driving-Force-Pressure-State-Response-Control) [18,19].
Following the principle of ecosystem health assessment, three major factors, including vigor (V), organizational structure (O), resilience (R), are integrated to construct an evaluation index [21].

Such coatings with high corrosion resistance, wear resistance and uniform coating thickness have wide applications in the industries of aviation, aerospace, electronics, petroleum, chemistry, machinery, textiles and automotive [6-9].
For the as-deposited coatings, it can be deduced that the Ni-P coating with and without SiC particles conserve their original structures.
That is to say, the addition of SiC particles does not change the structure of the Ni-P alloy during electroless plating progress.
After heat treatment, a precipitation transformation occurred in the amorphous structure of the coating (Fig. 2), which leads to an appearance of crystal defects, such as grain boundaries and phase boundaries.
Katgerman, The effect of heat treatment on the structure and abrasive wear resistance of autocatalytic NiP and NiP-SiC coatings, Surf.

According to mechanism of cement paste matrix forming [11, 17, 18], changing from the coagulation structure to crystalline structure a forming enough of new hydrate formations quantity is necessary.
It is occurred due to generating supplementary new formations of crystalline hydrate, which accelerates the processes of cement paste structure forming. 4.
Belichenko, Peculiarities of carbon nanoparticleseffect on the levels of the road cement concrete structure, Concrete Technologies. 8(97) (2014) 13-17
Bowen, The Atomic-Level Structure of Cementitious Calcium Silicate Hydrate, The Journal of Physical Chemistry. 121(32) (2017) 17188-17196

Steam oxidation is not a treatment that can produce structural changes, all the samples have the structure consists of ferrite and pores filled with iron oxides phases specimens .In Figure 3 is presented the optical microscope images of the steam treated specimens, the enrich areas of iron oxide were observed near the ferrite grains.
The diffraction analysis shows the formation of the spinel cubic structure type due to the strong reflection coming out of the plane (311), characteristic for the magnetite.
The indexed peaks as planes (220) and (311) are corresponding to a cubic unit cell, characteristic for the spinel cubic structure type [19].
German, Relation between pore structure and fatigue behavior in sintered iron–copper–carbon, Int.
Fleet, The structure of magnetite: Symmetry of cubic spinels, Journal of Solid State Chemistry 62 (1986) 75–82

Structure of the pyrite FeS2 unit cell.
Pyrite FeS2 crystallizes in a NaCl-type cubic structure with the space group Pa3 (Figure 1).
In order to explore the adsorbate coverage effect of the NH3 adsorption on the FeS2 (100) surface, we expanded the FeS2 (100) surface to (2×2) surface structure.
Luther, Chemistry of iron sulfides, Chem.
Nilsson, Experimental and theoretical characterization of the structure of defects at the pyrite FeS2 (100) surface, Phys.

Properties and Mechanism of Al2O3-Al Composite Powder Prepared by Hydrothermal Method Yuzhen Wang1,a, Zhiqiang Shen2,b, Jieguang Song1,c*, Guangyuan Yang2,d, Mengli Qin1,e, Ci Wang2,f and Yuxiang Liu2,g 1School of Materials and Chemistry Engineering, Pingxiang University, Pingxiang 337055, China 2Jiangxi Baixin Electric Porcelain Electric Co., Ltd., Pingxiang 337244, China a3438645793@qq.com, b258371717@qq.com, c20010038@pxu.edu.cn, dbxdc360@163.com, eqinmengli71289@126.com, f307510846@qq.com, g2729957613@qq.com Keywords: Composite powder; alumina matrix; powder properties; hydrothermal method.
With the change of pH value, the higher the pH value, the lower the degree of encapsulation, and when the pH value reaches 12, the composite powder packaging structure is relatively good.
With the change of pH value, the higher the pH value, the lower the degree of encapsulation, and when the pH value reaches 12, the composite powder packaging structure is relatively good.
As for the preparation of alumina coated aluminum powder composite powder by hydrothermal method, the preparation process is salt-alkali ratio 1:1, pH=5, stirring speed 1500r/min, stirring time 10min, 60℃ hydrothermal reaction for 5 minutes, drying temperature 200℃, the coating structure of Al2O3/Al metal matrix composite powder material is relatively good.
Kumar, Formamidinium lead iodide perovskite: Structure, shape and optical tuning via hydrothermal method [J].