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The thermal behaviour of the bulk bioactive glass and of the powdered samples with different grain were studied using SETARAM TG/DTA SETSYS 1750o C rod, with heating rate 10 oC/min up to 1400 oC -in argon atmosphere- and furnace cooling and the weight was in all studied samples about 40mgr.
Because the δTc is proportional to the number of nuclei, the ratio of total surface area to volume decreases with increasing particle size for the same total mass of sample.

For later use, it is convenient to number these phases from the inner core to the outer shell.
Because of this geometric constraint, the cement grains cannot pack efficiently near the aggregate surface, leading to a higher concentration of water in the interphase.

With the hydration reaction, a large number of C-S-H gel form, flocculent C-S-H gel with fewer needle AFT intertwined growth and bond together.
(In Chinese) Experiment on the mechanism of consolidating backfill body of extra-fine grain unclassified tailings and cementitious materials [J], 2012, 31(5): 48-52

It is likely contain a large number of vitreous body.
The reaction can consume Ca(OH)2 crystals and prevent the generation of large-sized grains [19].

There are a number of manufacturing method available to fabricate AMCs like powder metallurgy, ball milling, friction stir processing, pressureless infiltration method etc, but conventional stir casting is very effective and low cost process and can produce complex shape products and offers a wide range of material and processing condition [6-8].
When volume fraction of reinforcement particles increases it results in an increase in the dislocation density around the reinforcement particles during solidification, reduction in grain size and an overall reduction in substructure [12].

The Fourier transform infrared (FTIR) spectra of pure and doped polymer films were recorded using NICOLET Model 5700 spectrophotometer in the wave number range 400-4000cm-1 with a resolution of 4cm-1 using KBr pelleting method.
Here Fig.4 (a), shows a clear tetragonal shaped nanostructure with a grain size of. ~ 200nm.

The corresponding CPDI is dubbed CPDI-Poly which is obtained simply by sub-dividing a cell into a number of triangles.
It is also a natural choice for applications that exhibit features similar to Voronoi cells such as grains of polycrystalline metals and drying muds.

Table 1 Preparation conditions for the orthogonal test of nano-silver substrate Experimental Conditions Serial number The concentration of KCl [mol·L-1] Oxidation- reduction potential [V(vs.SCE)] Oxidation- reduction potential [V(vs.SCE)] Oxidation- reduction potential [V(vs.SCE)] 1 0.10 0.30/-0.25 0.25/-0.45 0.25/-0.45 2 0.10 0.25/-0.25 0.25/-0.25 0.25/-0.25 3 0.10 0.20/-0.25 0.25/-0.10 0.25/-0.10 4 0.01 0.30/-0.25 0.25/-0.25 0.25/-0.10 5 0.01 0.25/-0.25 0.25/-0.10 0.25/-0.45 6 0.01 0.20/-0.25 0.25/-0.45 0.25/-0.25 7 1.00 0.30/-0.25 0.25/-0.10 0.25/-0.25 8 1.00 0.25/-0.25 0.25/-0.45 0.25/-0.10 9 1.00 0.20/-0.25 0.25/-0.25 0.25/-0.45 Fig. 2 SEM image of No. 2 nano-silver substrate The analysis of enhancement effects with nano-silver substrate prepared in different oxidation-reduction time.
Table 2 The electrochemical test conditions in the presence of KBr Experimental conditions Parameter The first oxidation-reduction The second oxidation-reduction The third oxidation-reduction Oxidation-reduction potential [V(vs.SCE)] 0.25/-0.25 0.25/-0.25 0.25/-0.25 Reaction time[s] 20 100 100 Fig. 3 SEM image of nano-silver pieces(50000 times) As shown in Fig. 3, the nano-silver substrate met the SERS requirements of nano active substrate: regular nano surface was prefect, and the grain size was very uniform; meanwhile, some nanowires could be found, and corrosion hole depth was shallow.

From the diffraction pattern, it is observed that the sample has α-NaFeO2 structure with R3m space group [JCPDS file number: 500653] which depicts the layer structure of LiCoO2 [6].
The particles with an average grain size of 150 nm are distributed inhomogenously and well dispersed without any agglomeration.

Base on this, the total number of all the samples are tuned to achieve an equal thickness about 200 nm.
Proper bilayer period promotes the coherent grain boundaries growth before the stable h-AlN form, and form columnar crystal penetrate all through the film.