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However, the green compacts of cold pressing exists inner stress and its grains distribute nonuniformly.
It could be seen the grains of sintered samples prepared by warm pressing are smaller than that of cold pressing form, for the former has wider X ray diffraction peak.
As we all know, grains’ refining strengthening is beneficial to mechanical properties.
Although the sintering temperature of the green compacts by cold pressing was lower than that of warm pressing, a large number of experiments showed that the sintering processes of samples by cold pressing took longer sintering time in the overall sintering time.
It is known that eddy current is excited in each grain according to the theory of skin effect [14, 15].

Nitrogen content of different crops and grain-straw ratio can be seen in Table 1.
Table 1 Grain-straw ratio and nitrogen content of different crops corn rice soybean N content 2.6 2.1 7.2 Grain-straw 2.0 1.4 2.0 The main data in this study were derived from various approaches, as shown in Table2.
Table 2 Classifications and source of essential data Data type year Data source population population data of each county 2001～2010 The yearbook of Jilin Province fertilizer N fertilizer, P fertilizer 2001～2010 the yearbook of Jilin Province agriculture corn, rice, Soybean planting area, produce 2001～2010 the yearbook of Jilin Province beasts livestock inventories and slaughtered numbers 2001～2010 the yearbook of Jilin Province Land utilization Land use data 2004 remote sensing hydrology Water quality 2000～2010 Hydrology data of Liao River basin Results and discussion Temporal changes of N balance.
The larger population density (more than about 1000people•km-2)in urban areas increases demands for meat, milk, eggs and food and improves initiative of surrounding residents for being engaged in grain and livestock breeding industry.

It indicated that BNBT ceramics with appropriate mixture of these two kinds of glass additives have a number of potential applications on passive integrated devices based on the low-temperature co-fired ceramics technology. 1.
Phase distribution and grain morphologies of BNBT with glasses sintered at 850℃ are shown by the electron micrographs of Fig. 4.
The introduction of different glasses significantly changes the grain morphology of BNBT ceramics.
It can be seen from Figs. 4(a) that distinct grains with cuboid morphology exist in the BNBT ceramics added single BBS glass.
The SEM image in Fig. 4(b) shows particles with near-cubic morphology and with grain sizes of about of 1 um.

Some important optical parameters including, refractive index n, extinction coefficient k, optical dispersion energies E0 and Ed , optical band gap energy Eg and the ratio of charge carriers numbers to effective mass N/m*, were evaluated.
The SEM images of ZnO:Mn films show that the grain boundaries are well defined and the grains distribution over the surface is more uniform comparing to the undoped ZnO film.
The reason of this relation originates in tendency of Mn atoms to accumulate in the grain boundaries and play a significant role in grain boundaries oxidation, decreasing the oxygen deficiencies and hence carrier density in specimens.

Parameters of the samples before degreasing and after sintering are shown in table 2 below, the numbers in table 2 are all average.
Crystalline grains' shapes are irregular and in different size.
According to the size of the powder particles, the grains are not growing significantly.
There is a lot of space among the grains, which means there is little liquid flow.
But from the local perspective, some grain boundary is quite obvious.

Fabrication of stable and device-quality p-type ZnO, however, has not been realize regardless of a large number of publications stating successful demonstration of p-type [5, and reference therein].
Fig. 2(a) demonstrates a dense uniform grain distribution with smaller grain size.
In contrast to Fig. 2(a), Fig. 2(b) and Fig. 2(c) result in larger grain gap with inconsistency in size and surface distribution.
The grain size and film distribution can be verified through the AFM analysis as depicted in the Fig. 2 insets.

The defect consists of four grains - two Fig. 1: (a) A TEM image from a near interface region of the layer grown on the 6H-SiC substrates, revealing 3C-SiC after a transition zone above the 6H-SiC; (b) higher magnification in the near-layer region in the transition zone, where 3C-SiC (the stripes with white contrast) and random sequences are mixed and (c) higher magnification of a region within the transition zone closer to the 6H-SiC substrate, where admixture of 15R- and 6H-SiC is observed. of them twinned along the (111) planes without having a common planes (T1 and T4), other two (T2 and T3) twinned along the ( 111 ) planes of T1 and T4, forming two coherent Σ3 interfaces (T1/T2 and T3/T4).
They are accompanied by a formation of grains slightly misoriented about the [011] axis.
In addition, the number of different domains misoriented about the [011] axis in certain areas was observed to be higher.
However, it is noteworthy that even if such defected areas are observed, large areas with low defect density were also formed within the grains when being located some distance away of the domain boundaries.
The detected defects in this case are misoriented grains, SFs and 6H-SiC inclusions.

These tests took place in three forms, solid block samples (short beams), aggregate with grain size between 5 and 10 mm and lastly powder form (grain size 0,040-0,063 mm).
Lastly, thermal load on aggregate with grain size of 5 to 10 mm was made.
Scanning electron microscopy (SEM) was used to determine size of grains of CaO created during thermal load.
LO1408 "AdMaS UP - Advanced Materials, Structures and Technologies", supported by Ministry of Education, Youth and Sports under the „National Sustainability Programme I" and by project number: 15-08755S “Study of effects of samples preparation on inorganic binders final properties”.

ImageJ software has been used to analyze the grain size and morphology of the annealed films.
The sharp and strong reflections at 2θ = 23.74° indicating that the annealed stack at above 400 °C improve the crystallinity of the Cubic CdTe structure with (111) orientations, probably by promoting grain growth and reducing inhomogeneous stress [5].
Pi (TC) = N (Ii/I0) / ΣNi=1(Ii/I0) (2) Where Pi is the Texture Coefficient of the plane I, Ii is the measured integral intensity, I0 is the integral intensity of the JCPDS powder diffraction pattern of the corresponding peak and N is the number of reflections considered for the analysis.
In addition, the average grain size of all annealed stacks was evaluated by using the ImageJ software and compared.
SEM analysis showed the significance of Sb layer near the top surface in promoting the grain growth at high annealing temperature.

Alloys prepared by the high-pressure squeeze casting have very high density and an acceptable grain size.
Die cast magnesium alloys usually consist of dendritic α-Mg grains with intermetallic phase(s) in the interdendritic regions.
Formation of both types of precipitates was observed along the grain boundaries [2].
Results and Discussion Microstructure of the as cast alloy used in this study exhibits typical dendritic structure with α-Mg grains decorated by particles.
The number of independent mode of the basal slip is only two, which is not sufficient for the satisfying of the von Mises criterion [7].