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Ultrafine (Ni/Mn)CuZn ferrite with uniform composition, small grain size, and narrow size distribution are expected to realize low temperature sintering and attain ideal magnetic property at the same time [2, 3].
OHmnClNHOmHOMeCOnHMeClOHOCNH 2 4 242 22 24224 )1(2 )( −+++↓⋅→⋅+⋅ (1) where Me are Ni, Mn, Cu, Zn and Fe ion. m and n are the number of hydrate .
It is possible to sinter at low temperature by means of its small grain size, large surface area and high surface free energy.

The size of most powders was about 10-30µm and a large number of oddments were presence as shown in Fig.1a.
Fig.2b is high magnification of Fig.2a, which shows some MWCNTs (shown by arrows) were inserted the Al2O3 grains and several Al2O3 grains were glued together.

As illustrated schematically in Fig. 3, a number of iron oxide nuclei can grow with different crystallographic orientations in the synthesis condition of the present experiment.
The iron and oxygen molecules needed to form iron oxide grains (shells) on the surface of iron acetylacetonate vapor are provided from iron molecules inside the precursor and the reaction gas (O2) outside the precursor respectively.
Two shells of hollow nanoparticle grow with different orientation and meet together, forming grain boundaries between each nanocluster nuclei.

Yang et al. have studied the ISSW between tool steel and structural steel subjected salt bath cyclic quenching, and concluded that the finer the grain is, the easier the ISSW is [6].
As mentioned above, very fine and non-stable microstructure formed on the surface of 40Cr steel after laser quenching, which caused a number of grain boundaries, dislocations and vacancies.

The grain sizes of all films were calculated according to the Scherrer’s equation using all SiC Bragg peaks, and the grain sizes of the SiC films are 6.2 nm, 9.2 nm and 11.0 nm, respectively, with deposition temperature of 700, 800 and 900 °C.
Although the great number of synthetic peaks used may appear to be difficult for interpretation, they fit very well with the literature data for similar systems.

Introduction Any grinding wheel is made up of grains distributed in a bond system, with around 20 to 30% of pores [1].
Because of random distribution of grains and bonds, it is only the density that can be maintained during production.
These have a number of strands equally spaced so that different web structures can be formed.

In order to carry high critical current density, superconducting thin film must be well textured to minimize weak links at high-angle grain boundaries [1].
A large number of materials have been investigated for a possible buffer layer on top of the MgO.
From the cross-sectional SEM image, BZO film has a columnar structure which reflects grain growth direction of columns is perpendicular to the MgO substrate.

The upper is red massive fine grained feldspar sandstone, medium to intensity weathering.
The bottom is brownish red thick-bedded fine-grained feldspar sandstone.
Table 3 The indoor shear experiment result of landslide face soil Soil Values Quick shear Repeated saturated shear C[kPa] Φ[°] C[kPa] Φ[°] Slip-surface Number 5 5 5 5 Min. 19.0 19.5 13.0 17.3 Max. 30.0 24.8 22.0 22.8 Ave. 23.8 22.2 17.3 19.4 SD 4.27 1.96 3.28 1.95 Table 4 The comparison of indoor experiment and in-situ experimental values Type Residual saturated shear Bonding Inner Frictional Angle C[kPa] surpass or exceed than Ave.

Introduction In recent years, a number of materials with negative thermal expansion (NTE) have been discovered [1-6].
It is shown that both m-ZrO2 (see Fig. 7a) and α-ZrW2O8 (see Fig. 7b) present as fine grains and disperse homogeneously in the composites.
The rest of Y2O3 additive may serve as sintering aids to impede the growth of larger grains of ZrW2O8 and improve the densities of the ceramics.

Segregation induced by neutron irradiations causes Cr-depletion at grain boundaries [6, 7].
Low (Cr)/high (Ni,Si) material simulates the grain boundary composition of irradiated 304L type stainless steel.
The number of secondary cracks is very limited Fig. 9 In-situ observation In-situ observation.