Search results

IR spectrum: The bentonite was tabletted after mixing with KBr solution, analyzed on Thereto Nicolet 470FT infrared spectrometer with the wave number range of 400-4000 cm-1.
The organic clay has many advantages of more uniform grain-size dispersed, larger surface area, gentler outline, better continuity.

There are a great number of publications on research of recycling of demolished concrete, of which most are in regard to recycled aggregate (RA) made from demolished concrete [1-6].
The normally used mechanical process of breaking down blocks of demolished concrete into relatively small grains, may cause RA suffer internal damage such as micro-cracks [1-3] and RAC have relatively low strength [7].

Because there is some disadvantages of using Marine animals carapace to extract chitosan, such as the sources of the raw materials are regional restrictions, aquatic animals’ seasonal breeding lead to the raw material supply fluctuate, handling the calcium carbonate in animals shell needs a large number of acid and it will produce a lot of wastewater [5].
Grain processing and food machinery, 2002,（12）：38-40.

Analyses of samples chemical and structural composition were realised using a scanning electron microscope Jeol JSM 7000F with an Oxford Instruments EDX analytical unit with autoemission nozzle and a microanalysis unit INCA Energy 250 allowing element analysis from atomic number 5.
Ferrite forms polyedric grains, constituting approximately 50 % of structure.

Analysis object is NanYangpo 4th coal seam, 4101 mining face and its transport tunnel and back wind tunnel, working face length of 200m, towards length of 100m, the coal seam dip angle is nearly horizontal, the main minable coal average thickness of 5M, direct top is mudstone, thickness 3.5M, old top is fine grained sandstone, the thickness 9m,adopt caving coal mining ,roadway height 3M, height of top-coal 2m.
Author Introduction; The First Author Name : Zhang Meichang Gender: Male ID card number: 210902198711211515 Tel: 13841849555 Email：45477722@qq.com Job: Liaoning Technical University , Mining Academy Academic Qualifications: Graduate students Tutor: Wang Jiren Major: Mining Engineering Research Direction: Control Theory of Roadway Surrounding Rock References： [1] Qian Gaoming, Shi Pingwu, Mine Pressure and Strata Control [ M], China University of Mining and Technology press,2003-11 [2] Xu Yongqi, Coal mining[M],China University of Mining and Technology press,1999-8 [3] Zhang Xiaojun, Sensitivity Analysis of Factors Influencing the Stability of Mined Area[J], Mining Research and Development, Vo.l.26.No.1ISSN 1005-2763 [4] Chi Yong, Zhou Jian, Kang Jinghao.

When samples are calcined at higher temperatures, the adsorbed water and hydroxyl number of them decrease, and a lot of rutile phase appear, and then cause poor photocatalytic performance.
The results indicate that (Fe, N) doped together also has the effect of refining the grain size and the samples have larger specific surface areas and better photocatalytic activity.

Table 1 Experimental data of samples Sample numbers Ro (%) Mercury injection tests Nitrogen adsorption experiment porosity (%) permeability (mD) aperture (μm) mercury ejection efficiency (%) specific surface area (m2/g) pore volume (ml/g) aperture (nm) 1 2.02 1.1 0.1188 0.07 57.51 0.719 0.00337 7.629 2 1.88 1.7 0.0591 0.07 58.39 6.744 0.00927 5.499 3 4.52 2.7 0.0142 0.17 42.39 3.123 0.00894 11.45 4 3.53 1.5 0.0168 0.05 58.08 0.828 0.00282 13.61 5 4.16 13.2 0.0721 0.05 63.82 2.883 0.00737 10.22 6 2.55 2.3 0.1004 0.04 31.45 0.714 0.00400 22.40 3 Experimental results 3.1 Mercury porosimetry results Longtan formation shale samples’ mercury entrance and ejection curves(fig.1,2,3) are divided into three classes, each curves have distinctive characteristics.
Clay minerals aslo have a great impact on porosity, pores between polymer grains and layers make large contribution to porosity[9-10].

Introduction Zn-Al-Cu type alloys are characterized by a number of advantageous properties which include: good castability, good tribological properties, low energy for shaping of the products.
The main alloying addition is aluminium [3], its addition increases the castability, influences the size reduction of grains and improves the mechanical properties [5].

A number of transparent conducting oxide materials have a large area of applications in industry.
The results indicated that high temperature annealing leaded to the films with a lower sheet resistance, which inferred a better crystallinity of films and lower defect near the grain boundary .The decrease in resistivity with temperature can be attributed to the increase of carrier mobility and the decrease of boundary scatter.

Table 2 Orthogonal experiment selection condition and level Factor levels 1 2 3 1.organic alcohol concentration（%） 97 96 95 2.organic alcohol dosage (ml/g) 3.4 3.5 3.3 3.chloroacetic acid (mol) 0.11 0.115 0.105 4.NaOH(mol) 0.24 0.25 0.23 5. alkalization temperature (℃) 30 32 28 6. etherification temperature (℃) 56 59 53 7. etherification time（h） 4 4.25 3.75 Table 3 Orthogonal experimental results numbers 1 2 3 4 5 6 7 DS 1 1 1 1 1 1 1 1 0.816 2 1 2 2 2 2 2 2 0.976 3 1 3 3 3 3 3 3 0.747 4 2 1 1 2 2 3 3 1.012 5 2 2 2 3 3 1 1 1.019 6 2 3 3 1 1 2 2 0.887 7 3 1 2 1 3 2 3 0.481 8 3 2 3 2 1 3 1 0.864 9 3 3 1 3 2 1 2 0.406 10 1 1 3 3 2 2 1 0.524 11 1 2 1 1 3 3 2 0.943 12 1 3 2 2 1 1 3 0.874 13 2 1 2 3 1 3 2 0.921 14 2 2 3 1 2 1 3 0.886 15 2 3 1 2 3 2 1 0.886 16 3 1 3 2 3 1 2 0.423 17 3 2 1 3 1 2 3 0.633 18 3 3 2 1 2 3 1 0.594 Mean value1 0.813 0.696 0.783 0.768 0.833 0.737 0.784 Mean value2 0.935 0.887 0.811 0.839 0.733 0.731 0.759 Mean value3 0.567 0.732 0.722 0.708 0.750 0.847 0.772 range
Zhengzhou Grain College Journal.