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Result and Discussion Crystal structure of the synthesized Ca(OH)2 was evaluated by XRD analyses as shown in Figure 1, displaying the XRD patterns of synthesized Ca(OH)2 sample dried at 80°C and reference.
Maturation time contributes to crystal structure perfection can be caused by aqueous solution, but overall those factors are not significant for material technological performance [13,14].
The Palimanan’s Limestone (CaCO3) has not been characterized clearly in crystal phase, chemical structure, and its purity.
Walsh, Aspects of solvent chemistry for calcium hydroxide medicaments, Materials. 10 (2017) 1-8

While these oxides are bonded in the clay mineral structure, they are insoluble.
This could be related to the activation of silicates through the removal of water and changes in the crystal structure up to a temperature of about 700 °C [9].
Weber, Roman Cements: Key materials of the built heritage of the 19th century, in.: Materials, Technologies and Practice in Historic Heritage Structures, Berlin, 2010, pp. 259-277
Hewlett (Ed.), Lea’s Chemistry of Cement and Concrete, Elsevier Science & Technology Books, 2004, p. 78 [10] D.C.

Effect of the Adjuvants on the Properties of Superfine SnO2 Powders Jieguang Song1a, Lin Chen1, Xianjie Zhou1, Xue Yang1, Xinpeng Lou1, Meihua Chen1, Xiaohui Lai1, Chao Yang2b, Aixia Chen2 1Key Laboratory for Industrial Ceramics of Jiangxi Province, School of Materials and Chemistry Engineering, Pingxiang University, Pingxiang 337055 China 2School of Mechanical and Materials Engineering, Jiujiang University, Jiujiang 332005, China asongjieguang@163.com; b304542351@qq.com Keywords: Nano powder; powder metallurgy method; alumina; molding process.
According to the study, SnO2 surface activity is higher, the specific surface area is larger; in addition SnO2 structure is more special, with good adsorption [1-3].
With the superfine material, the surface electronic structure and crystal structure have changed, resulting in the block material does not have the surface effect, small size effect, quantum effect and macroscopic quantum tunneling effect, so that ultrafine powder and conventional particle material has a series of excellent physical and chemical properties, ultrafine powder has many unique properties, mainly as follows, the specific surface area, low melting point, magnetic strong, good activity, good light absorption, good thermal conductivity.

In last decade, the sensors have been investigated in the fields of environment, medicine, chemistry, physics, and biology [3,4].
The structure of microcantilever with gold/aminosilane layer is illustrated in Fig. 1.
(a) Microcantilever with the sensitive layer, (b) Radius of curvature (R) of the double layer structure Stress and Deflection in Double Layer Microcantilever We use a silicon microcantilever with length l, width w, thickness t, and Young’s moduli E.
Ettenberg, Calculated stresses in multilayered heteroepitaxial structures, Appl.

Intorduction： Fe-Al intermetallic compounds(Fe3Al,FeAl) have special structures of long range order, this make them have many good physics, chemistry and mechanical properties performances such as unique nature of electrical, thermal, magnetic, light, and sound，excellent resistance to corrosion and high-temperature structural properties, specific strength and yield behavior of anomalous, but the most attractive feature is the low prices of raw materials.
Fig.2 SEM microstructure of the composites under different resolutions Fig.2 is the microstructure of the composites under different resolutions SEM pictures, from the pictures we can see the structure features of composite: the composite is constituted by matrix and strengthening phase which exist at the junction of matrix, another features of the composite is much fibers is observed in the pores, the fibers has a complete morphology, high ratio of length to diameter, among the dozens of to 200 or 300 nm in diameter.
As we all know, the crystal Al2O3 has the close-packed hexagonal structure.

Biodegradable Iron-Based Foams for Potential Bone Replacement Material Monika Hrubovčáková1,a*, Miroslav Džupon1,b, Miriam Kupková1,c and Renáta Oriňaková2, d 1Institute of Material Research of SAS, Watsonova 47, 040 01 Košice, Slovak Republic 2Department of Physical Chemistry, Faculty of Science, P.
Polyurethane foam (BulprenS, Polypro), cell size 50 – 65 PPI with an interconnected structure, was used as a sacrificial template.
Secondly, the metal structures were sintered at 1120 °C for 1 h in atmosphere of 10 % H2 – 90 % N2.
Material Yield strength, Rp0.2 [MPa] Elastic modulus [MPa] Hardness HV0.01 Fe 1.1 ± 0.19 15.3 ± 2.79 68 ± 13.0 Fe-P 2.1 ± 0.30 22.4 ± 6.80 278 ± 80.7 Conclusion Iron-based cellular materials with an open interconnected structure, pore size between 300 – 800 µm, total porosity up to 92 % and densities of 0.74 – 1.3 g.cm-3, were successfully fabricated by a replica method.

Development of Natural Rubber Latex Foam for Hand Exercising Application Surasit Kajon1,a, Voranuch Somsongkul2,b and Pimsiree Suwanna1,c* 1Department of Materials Science, Faculty of Science, Kasetsart University, Thailand 2Department of Industrial Chemistry, Faculty of Applied Science, King Mongkut’s University of Technology North Bangkok, Thailand asurasit.kaj@ku.th, bvoranuch.s@sci.kmutnb.ac.th, cpimsiree.s@ku.ac.th Keywords: Natural rubber, Rubber foam, Hand exercise ball, Safe accelerator Abstract.
The cell structures of the low-risk formulation foams at different hardness levels are shown in Fig. 1.
The cell size and porosity become smaller and the cell structure becomes less opened as the forming process gets shorter and/or less vigorous.
Rodriguez-Perez, Natural rubber foams with anisotropic cellular structures: Mechanical properties and modeling, Ind.

Effects of the Usage of Wasted Diatomite and Phase Change Materials as Partial Replacement of Cement on the Mechanical Properties of Concrete Yeng-Fong Shih1,a, Wei-Cheng Hou2,b, Venkata Krishna Kotharangannagari3,c, Ming-Gin Lee4,d 1,2,3Department of Applied Chemistry, Chaoyang University of Technology, No. 168, Jifeng E.
Concrete is divided into three types according to its strength, which are (1) low strength (>210 kgf/cm2): it is used for wall leveling of non-main structure and it can be used as the surface smoother of partition wall or an adhesive of block masonry. (2) medium strength (210 ~ 420 kgf/cm2) and (3) high strength (> 420 kgf/cm2): medium and high strength concretes are used as a high-rise building (mainly cylindrical), pre-stressed concrete members, such as piles and utility poles [1-3].
The main component of diatomite and silica fume is same that is SiO2, but the diatomite (DE) is light weight, soft in texture and has good water absorption characteristics, due to its porous structure.
To avoid PCM leakage, PCM can be adsorbed on an adsorbent that has a stable structure (such as DE) to form a shape-stabilized phase change material (SSPCM) [10].

This disparity derived from the difference structure, previous study [5] showed that surface layer, layout of each layer, especially the middle layer and the bonding strength were all affecting mechanical strength.
Previous study [9] revealed that the degree of environmental degradation that occurs in a fiber reinforced polymer composite structure was linked directly with the amount of moisture, therefore it may deduce that BS EN 1087-1 may be more severity than ISO 16998 due to its wet condition when testing.
BPP was a promising outdoor material but improvement in structure or bonding strength should be made to expand its service life.
Sam William, Hand book of wood chemistry and wood composites Ch. 7 weathering of wood, (2005).

Besides, some methods such as mechanical alloying (MA) [7], spray drying method [8], sol-gel method [9] are employed to prepare the superfine/nano-W-Cu composite powders, and the electroless plating Cu method [10] is taken to fabricated the W-Cu powders with the core-shell structure.
Functionally graded materials (FGMs) are composite materials obtained through the gradual change of the structure or composition of two or more constituent phases (continuous or quasi-continuous gradient), at the same time the properties of the composite materials change gradually with position [12].
Tape-casting is a well-established technique used for large-scale fabrication of multilayered structures and the FGMs [13].
Wang: Materials Chemistry and Physics, Vol. 104 (2007) No.2, p.235 [9] Y.