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Introduction Porous ceramics, sintered at high temperatures with a large number of internal or closed pores connected to each other, rely on the pore structure and the material itself to achieve the desired functionality.
The carbon fibers mentioned in this study are high-strength, with low graphitization degree and preparation temperature, and in the edge of the grain boundaries there are a lot of active points which are prone to reactions and cause the mechanical properties of fiber to attenuate seriously.

It may be caused by the formation of average grain size of 30-60 nm crystallines with strong hardness, reducing domain-wall motion of longitudinal direction. 1 10 100 1000 10000 0 5 10 15 20 25 µ' Frequency (kHz) measured data fitted curve µ'dw µ'rot µdw µrot fdw frotµinf (a) 1 10 100 1000 10000 0 5 10 15 20 25 µ' Frequency (kHz) (b) µdw µrot fdw frot µinf Fig.1.
Journal Title and Volume Number (to be inserted by the publisher) 3 -40 -30 -20 -10 0 10 20 30 40 0 10 20 30 40 50 60 70 80 90 �Z/Z (%) Magnetic Field (Oe) Increase Decrease (a) -40 -30 -20 -10 0 10 20 30 40 -5 0 5 10 15 20 25 30 35 40 45 50 -40 -30 -20 -10 0 10 20 30 40 -1 0 1 2 3 4 5 �Z/Z (%) Magnetic Field (Oe) �Z/Z (%) Magnetic Field (Oe) (b) Fig. 3.

In this study, based on a large number of domestic and foreign literatures and previous studies[3,4,8], and combined with the characteristics of H-acid production wastewater, Fe was chosen as the active component of the catalyst prepared by impregnation method, and it was applied in catalytic wet peroxide oxidation (CWPO) treatment of H-acid wastewater, with COD removal rate as the main evaluation index of catalyst activity, the effect of carrier particle size, concentration of impregnation solution, calcination temperature, and calcination time on the activity of catalyst were studied in detail, then the preparation process for the catalyst Fe/SiO2 was optimized.
The calcination temperature can change the pore structure, grain size, and chemical state of the catalyst.

Optional iron mainly in the form of magnetic iron content of 6.32%, its share of 36.94%, followed by hematite, limonite, content was 2.87%, and its share of 16.77%; iron silicate minerals content of 6.73%, 39.33% of the total iron content; while a small amount of iron to form iron carbonate and iron sulfide present, the amount of 0.26%, 1.52% of the total iron content. 1.2 Sample size analysis Table 3 Iron distribution in each grain Sizefraction （mm） Productivity（%） Accumulation of positive Productivity（%） Accumulation of negative Productivity （%） Grade （Fe%） Distribution rate（Fe%） +0.5 2.59 2.59 100.00 9.21 1.36 -0.5+0.3 15.05 17.64 97.41 9.37 8.04 -0.3+0.165 13.47 31.11 82.36 10.25 7.88 -0.165+0.074 26.38 57.49 68.89 15.20 22.87 -0.074+0.047 8.74 66.23 42.51 22.09 11.01 -0.047 33.77 100.00 33.77 25.35 48.84 Total 100.00 17.53 100.00 Table 3 shows the results of particle size sieve analysis, processing recycled objects mainly enriched in iron -0.047mm level, up 25.35 percent
Research shows that lost to tailings iron minerals are mainly of two parts, one part is not a large number of coarse particles monomer dissociation, and the other part is fine iron particles over crushed minerals produced. 2 Experiments Through the properties of iron ore tailings in Yunnan shows: coarser ore, mineral composition is relatively complex, as many as a dozen have been identified mineral species, useful minerals are mainly magnetite (partial oxidation of martite ), hematite, limonite.

As a result, different types of crop (grain, root, vegetable, aromatic and medicinal herbs, ornamental plants, tree and fruit crops) and animals (poultry, rabbits, goats sheep, cattle, pigs, guinea pigs, fish, etcetera) are planted and raised in harmony, forming a self-sufficiency small biosphere.
Vertical farm, as an example, seems to be a new solution for scientific reuse of the waste materials, integrating a number of agro-ecological ideas and technology through the vertical space, such as waste recycle, hydroponics, aquaculture and so on [4].

Lower part of section A mainly appeared high density turbidity currents with coarse-grained sandstones and pebbles, characterized by grossly fining-upward successions.
Based on the characteristics of seismic profiles, a number of sublacustrine fan types are identified in the north Liaozhong Depression: (1) “vermicular” seismic reflection with middle-strong amplitude, good continuity and soft deformation structure; (2) “vermicular” hummocky seismic reflection with indiscriminate seismic reflection in the center and smooth seismic reflection on the margin; (3) seismic reflections with strong amplitude and lateral migration; (4) strong amplitude seismic reflections with distinct incised valley; (5) hummocky seismic reflection with strong amplitude and good continuity.

Legend: [1] TVA gun – cathode [2] Crucible [3] Material to be evaporated (C, Mg grains) [4] Substrates (Si and glass) [5] Thickness monitor Fig. 1 The schematic view of the experimental set-up The main experimental parameters involved in this study are: If- the current intensity of the heating filament; Ua- the applied voltage; Ia- the arc’s current intensity; d- the distance between samples and the point of the ignition of the discharge; p-the pressure; tdep- the deposition time; φ- the cathode-anode relative position between a perpendicular line on the crucible centre and the electron gun axis.
Acknowledgment This work was supported by a grant of the Romanian National Authority for Scientific Research, CNDI–UEFISCDI, project number 160/2012, PN-II-PT-PCCA-2011-3.2-1453.

The thicknesses of the samples (see Fig. 3) were as follows: 0.215 mm (Sample 1), 0.057 mm (Sample 2) and 0.036 mm (Sample 3), the numbering being in order of decreasing thickness.
During this deformation the average size of crystalline grains reduced approximately by 20%, from 45 microns to 36 microns.

Introduction In recent years, ECAP has attracted the growing interest because it is one of the unique methods to produce ultrafine-grained (UFG) bulk metallic materials.
Their number is not limit to one pair.

Introduction Fibre cementitious composite material with a "strain hardening" represents very formable fine-grained concrete with the matrix based on Portland cement reinforced with short fibers.
The number of micro-cracks increases during another load, but the width of each of micro-cracks is not increasing, and remains stable at 60 μm [2] until the time when one of the multiple cracking fails by fracture.