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This method for synthesis of inorganic materials has a number of advantages over more conventional synthetic procedures.
Finally, as received powders were ground using motar in order to reduce the agglomerate grains.

The smaller equiaxed morphology may be a result of the use of the two lowest concentrations (see Table 1), where the relative dilution decreased the ionic collision frequency and increased the diffusion distance, both of which would minimise the grain growth.
Mean Diameters of SnO2 Agglomerates Concentration (M) Group Sample Number SnCl2 H2C2O4 Agglomerate Diameter (nm) SN11 0.04 0.04 532 ± 48 SN12 0.04 0.08 560 ± 63 SN13 0.04 0.12 657 ± 8 SN14 0.04 0.16 410 ± 15 SN15 0.04 0.20 598 ± 30 1 Average 551 ± 33 SN21 0.04 0.20 598 ± 30 SN22 0.08 0.20 415 ± 4 SN23 0.12 0.20 451 ± 7 SN24 0.16 0.20 521 ± 26 SN25 0.20 0.20 383 ± 18 2 Average 474 ± 17 600 nm Conclusions Pure SnO2 can be fabricated by chemical precipitation of SnCl2 and H2C2O4 followed by calcination.

It has excellent machinability and it is not susceptible to thermal shock up to 1400°C for a coarse grain [4, 5], and can be considered for a number of structural applications like fabrication of engine parts and turbine blades.

In addition, pore walls became thinner, pore size is smaller and more characterized with leaf-like structure with decreasing prefreezing temperature .It was because that prefreezing process had a great influence on ice crystal nucleus numbers and ice crystal size formed during the crystalline process.
Instead, the more coarse grains did.

Introduction A large number of natural phenomena characterized by very distinct qualitative and quantitative aspects, share common alternating dynamics in specific circumstances.
Rajchenbach Dynamic of grain avalanches, Phys.Rev.Lett. 88 (2002),14301

It is a more perfect material which preserves its mechanical and chemical properties for a long time and can accept a large number of radioactive elements contained in radioactive wastes into the lattice.
The grain size ranges from 15 to 25μm.

The average size of grain is about 5µm.
The number of the pores in the 60% SiC sintered bodies is much more than 0% SiC.

Introduction Rock mass is the aggregation of various mineral in the nature, and there are many discontinuities found at all scales, from grain boundaries to joints and regional faults within it.
A number of experimental studies[1] and numerical methods[2,3,4] have been performed to investigate the failure process of rocks or rock-like materials.

Fluoride lattices allow high coordination numbers for the hosted rare-earth ions.
The crystallite size can be estimated from the Scherrer equation, D = 0.90λ/βcosθ, where D is the average grain size, λ is the X-ray wavelength (0.154nm), and hand bare the diffraction angle and full-width at half- maximum (FWHM) of an observed peak, respectively (Birks and Friedman 1946).

Reflowing technology could has a good fluidity of tin solder, and it also could significantly improve bonding strength [7, 8].Suitable reflowing time and temperature could make the grain size of alloy layer on tinplate increase, and also the corrosion resistance would be enhanced[9-11].
With the decrease of quenching water temperature, the corrosion area of tinplate surface was gradually reduced, it indicated that the number of pinholes had a tendency to decrease, and its corrosion resistance improved.