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The nucleating agent also has an effect on both the crystal grain structure and the unit cellstructure.
This means that fumed silica has a significant role in grain refinement of HDPE.
But the more fumed silica in grain refinement is not very obvious in Fig. 2e-h.Obviously, the more fumed silica influnces nucleation of the HDPE phase and hinders well-developed spherulitization. 50μm 50μm 50μm 50μm d c b a 50μm 50μm 50μm 50μm h g f e Fig.2.
It has an effect on the crystal grain strcture.
Acknowledgements The authors gratefully acknowledge the financial assistance of Science and Technology Department of Heilongjiang Province(Grant Number GC10A108),the Education Department of Heilongjiang Province(Grant Number11541267) and National Natural Science Foundation Committee of China(Grant Number21206034).

Bi2Ti3O102 along the c-axis, whose bismuth titanate compounds allow the preparation of a great number of ferroelectrics materials having high Curie temperature, good stability of piezoelectric properties and good resistivity vs. temperature [3].
A typical example of the plate-like structure is given in the paper of Xu and Chen [6] who obtained BIT with noted microstructure after sintering at 1150 ˚C in air for 3h, where grains with two different morphologies were determined.
They are refinement in particle and grain size of starting materials, nucleation, and crystallization of target compound.
The lower density of BIT samples prepared by this method is believed to be a result of the formation of plate-like grains as it was reported in literature [10].
This suggests that the powder processing has a significant influence on the structural distortion resulting in different morphology of grains.

It is because that the nano-diamond can increase the nucleation rate and grain refinement of the coating , nano-diamond cell in uniform plays the role of dispersion so that improve the hardness of the coating.
This growth pattern of the coating determine the grain lamellar coating structure.
It can be seen from Fig 4 that the coating surface is of roughness, but there are a large number of pores, the porous coating is not continuous , and with the increase concentration of nano-diamond the grains gradually become small.
Furthermore, the cellular microstructure of composite coating which contains DND become smaller, in other words, when add DND to the electrolyte, the grain of coating will be refined significantly.

Because of the unequal artificial fermented grains and cloth material, the steam will produce channeling phenomenon through material layer, which can lead to unevenness along the cross section of heat transfer and distillation, reduces liquor yield, and causes a drop retort accident and damage of distillation.
The diameter of the steaming bucket is about 1.2 m, pore diameter is 6 mm, hole spacing is 20 mm, and the total number of holes on the plate is about 2000 and hole arrangement is the triangle array.
Opening rate is as follows: (1) The above calculation shows that the fermented grains of support plate opening ratio is 5% and relatively low.
In order to reduce the resistance loss of steam through support plate assure that the gas through the support plate and the gas velocity are closing, and the packing layer does not produce mutation, should make opening ratio of the support plate equal to or greater than the fermented grains of material of void fraction.
According to Reference [3], the voidage of 4 mm sorghum is about 39.2%.If the large container is 1.2 m, the void fraction is only about 30%.The opening ratio of the current supporting plate is only 5.65%, which will make the steam through the supporting plate faster than through the fermented grains of material, and the resistance is directly proportional to the square of the loss and gas velocity, through the sieve plate resistance loss is very big.

Results and Discussion The XRD patterns of the sintered bodies (Fig. 1) show a diminution in the number of the peaks with the increase of the sintering temperature.
At 1000o C occurred the grain growth and the formation of necks through the mechanisms of mass transport, joining the particles in contact (Fig. 4a).
At 1100 oC took place the increase of grain size and the coalescence of the grains (Fig. 4b).
The microstructure of the sample sintered at 1200o C became very dense, but presenting residual pores with sizes up to 2 µm between the grain boundaries and also inside the pore, indicating the final stage of sintering (Fig 4c).

However, mixing or(and) segregation in wet granular systems has received relatively little attention although liquid is present between the grains in many industrial applications.
We start with initially separated particle groups where the right half of the cylinder is purely composed of large beads (R=4mm) and the left half is small beads(r=2mm), giving a total number of 4420 particles and 40% filled volume fraction .
Discussion Wet granular material is a mixture of solid grains, liquid, and air.The cohesion induced by the liquid in wet granular changes the mechanical properties of granular materials.
This produces inter-grain cohesion and drastically modifies the mechanical properties of the granular media.
The cohesive force between grains due to liquid bridge play an important role as well as the dominant interactions are inelastic collisions and friction in the dry granular materials.Under the effect of cohesive force, some smaller particles clumped together to form bigger particles.

La-based materials, in particular, are good oxide ion conductors with high oxide ion transference numbers over a wide oxygen partial pressure range, and low activation energies of ~ 0.6-0.8 eV; La10(SiO4)6O3 is reported to have conductivity similar to yttria-stabilised zirconia at ~ 600°C [3].
The semicircle represents grain boundary response in intermediate-frequency.
SEM indicated that grains are approximately 1 μm in diameter and, for x = 2.00, are clustered to a slightly greater extent than in the undoped sample.
This clustering may lead to the more resistive grain boundary impedance observed for x = 2.00.
The activation energies of the total conductivity for x = 1.75 and 2.00 were higher, attributed to significant grain boundary effects, The variation in conductivity by the solid solution has something in common, but less than the previously investigated La9.33+y/3(SiO4)6-y(AlO4)yO2 solid solution and illustrates further influenced by the tetrahedral cation sublattice and the La vacancies in optimizing the conductivity Acknowledgments We thank the Wenhua College and Hubei Provincial Department of Education for funding.

In general, the resistivity of ITO films depends on carrier mobility and charge carrier density that determined mainly by oxygen vacancies or number of substituted Sn 4+ ion on In 3+ sites.
Therefore, it can be concluded that the decrement of resistivity with annealing temperature is caused by mainly grain size effect because large grain size (small grain boundary density) increases carrier concentration and carrier mobility [7].
It is well known that a small grain size decrease an optical transmittance due to increased optical absorption.

According to the experiments, under the same preparation conditions, mainly CCZD-11 agent preparation of temporary plugging agent particle coarse to give priority to with CCZD-1 agent preparation of temporary plugging agent of grain, so we choose CCZD-1 as main agent of the preparation of temporary plugging agent.
Temporary plugging agent of grain size of the preparation of other auxiliary reagent still cannot meet the requirements, unable to enter into the formation pore, so we choose CCJ, CCY, CCB-Z1, CCB-Y2, CCD-Y2 as auxiliary reagent.
Screening of solution temperature Through the experiment, although the preparation of the temporary plugging agent of grain is more and more thin, so we surveyed the melting temperature of temporary plugging agent the influence of particle size.
Fig 1 The influence of temperature on the CCZD–1 particles The conclusions from fig1 are as follows: (1) Between 25℃ ~ 85℃, adding additive A preparation of temporary plugging agent of grain is fine than without additive A preparation of particles, thus, between 25℃ ~ 85℃ temperature has no effect on the effect of additive A
Laboratory physical simulation Through the indoor experiment study of temporary plugging acidizing formula: Table 4 Experimental data from laboratory physical simulation Group Core number K1（×10-3μm2） K2（×10-3μm2） S（%） K3（×10-3μm2） R（%） 1 A-1 1383.7 72.09 94.79 1348.55 97.46 A-2 671.3 53.91 91.97 628.67 93.65 A-3 273.8 150.04 45.2 494.54 180.62 2 A-4 1586.4 38.07 97.6 1494.55 94.21 A-5 589.6 58.37 90.1 640.9 108.7 A-6 244.7 165.42 32.4 308.32 126.0 From the laboratory physical simulation, choose this type particle temporary plugging agent to core simulation experiment on acidification effect is very ideal.

A huge number of works on the heteroepitaxial layer growth both on sapphire and on SiC substrates has been conducted, leading to a strong improvement of the active layer quality.
The average size of individual grains is about 50 µm.
This means that AlN polycrystalline grains have a preferred orientation.
For a high AlN content (x=85%), i.e. for a large lattice mismatch, only a few grains without epitaxial relation are obtained (Fig.5a).
For a lower AlN content (x=55%), the lattice mismatch is lower, resulting in larger epitaxially grown grains, which start to coalesce.