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Online since: April 2008
Authors: Petr Mošner, Ladislav Koudelka, Josef Jirák, Miroslav Vlček
Table 1.
Fig.1 31P MAS NMR spectra of the glass series (C) xLi2O-(50-x)PbO-20B2O3-30P2O5.
Raman spectrum of the lead glass 50PbO20B2O3-30P2O5 shows a broad high-frequency band with the maximum at 1011 cm-1 the position of which is characteristic for the presence of Q 1 units.
In the middle-frequency region there are several small bands showing with increasing Li2O content a steady increase in the relative strength of two bands at 634-655 cm-1 and 736 cm-1.
References [1] P.
Fig.1 31P MAS NMR spectra of the glass series (C) xLi2O-(50-x)PbO-20B2O3-30P2O5.
Raman spectrum of the lead glass 50PbO20B2O3-30P2O5 shows a broad high-frequency band with the maximum at 1011 cm-1 the position of which is characteristic for the presence of Q 1 units.
In the middle-frequency region there are several small bands showing with increasing Li2O content a steady increase in the relative strength of two bands at 634-655 cm-1 and 736 cm-1.
References [1] P.
Online since: May 2015
Authors: Ting Ting Yan, Qing Hua Chen, Qing Hua Chen, Yan Ting Yin
The characteristic bands for PO43- appeared at 604cm-1, 561cm-1, 1111cm-1, 1030cm-1.
Bonds at 870cm-1, 1455cm-1 and 1420cm-1 correspond to CO32- demonstrating that the material contained traces of carbonate which similar to composition of natural bone apatite.
The bands at 804 cm-1 and 478 cm-1 assigned to stretch vibration of Si-O bond.
Peaks at 474cm-1, 812cm-1, 1111cm-1 and 3431cm-1 increase in intensity because similarities in vibration between SiO4- and PO3- [11].
Int J Appl Ceram Technol, 2012, 9(3): 479-485
Bonds at 870cm-1, 1455cm-1 and 1420cm-1 correspond to CO32- demonstrating that the material contained traces of carbonate which similar to composition of natural bone apatite.
The bands at 804 cm-1 and 478 cm-1 assigned to stretch vibration of Si-O bond.
Peaks at 474cm-1, 812cm-1, 1111cm-1 and 3431cm-1 increase in intensity because similarities in vibration between SiO4- and PO3- [11].
Int J Appl Ceram Technol, 2012, 9(3): 479-485
Online since: September 2013
Authors: Ai He Wang, Jie Deng, Cai Wen Wang
Experiment also found that when the CV<1 hydroxyl free radical production is higher,when CV>1 hydroxyl free radical production with the increase of the cavitation number range is very slow.
According to the literature[8] CV is around 1.0,cavitation effect is best.But in general,if you want to get the best cavitation effect,control flow conditions and geometry size are needed to keep CV<1.
References [1] Gogate P R,Pandit A B.
Divisions of Chemical Engineering, 2001,17(1):1-85
[7] Chen Lijun,Wu Chunde,Zhang Jiexin.Hydraulic cavitation applications in water treatment research progress [J].Ecological science,2006,25(5):476-479.
According to the literature[8] CV is around 1.0,cavitation effect is best.But in general,if you want to get the best cavitation effect,control flow conditions and geometry size are needed to keep CV<1.
References [1] Gogate P R,Pandit A B.
Divisions of Chemical Engineering, 2001,17(1):1-85
[7] Chen Lijun,Wu Chunde,Zhang Jiexin.Hydraulic cavitation applications in water treatment research progress [J].Ecological science,2006,25(5):476-479.
Online since: July 2012
Authors: Yue Li Li, Qu Fu Wei, Ling Ling Meng
Results and analysis
Surface Morphology
(a) (b) (c) (d)
Fig. 1: AFM images of copper-coated polyester fibers (a)untreated;(b) plasma treated for 3min;(c) plasma treated for 6min;(d)plasma treated for 9min
The AFM images of 5.0×5.0μm2 in Fig.1 reveal the surface structures of the copper-coated polyester fibers before and after O2-plasma treatment,as presented in Fig.1.
Fig. 1(c) and Table 1 show some larger and compacter clusters are formed on the fiber surface after plasma treatment for 6min.
It is attributed to roughening of the fiber surface by plasma treatment [10], as shown in Table 1.
References [1] Ren Y, Wang C, Qiu Y.
Growth. 274, 474–479 (2005)
Fig. 1(c) and Table 1 show some larger and compacter clusters are formed on the fiber surface after plasma treatment for 6min.
It is attributed to roughening of the fiber surface by plasma treatment [10], as shown in Table 1.
References [1] Ren Y, Wang C, Qiu Y.
Growth. 274, 474–479 (2005)
Online since: February 2013
Authors: Li Na Lei, Hui Mei Zhang, Jia Fan Zhang
Influence of occurrence environment on mechanical properties of shale
Huimei Zhang 1, a, Jiafan Zhang 1,b, Lina Lei 1,c
1 Department of Mechanics, Xi¢an University of Science and Technology, Xi¢an, Shaanxi 710054, China
azhanghuimei68@163.com, bzhangjiafan_339@163.com, c420712264@qq.com
Keywords: rock; occurrence environment; deterioration; mechanical characteristics
Abstract.
References [1] SHEN Zhu-jiang.
Rock and Soil Mechanics, 2002,23(1) :124- 128
Key Engineering Materials,2006,306-308: 1 479–1 484
Rock and Soil Mechanics,2011,32(Supp.1):155–159
References [1] SHEN Zhu-jiang.
Rock and Soil Mechanics, 2002,23(1) :124- 128
Key Engineering Materials,2006,306-308: 1 479–1 484
Rock and Soil Mechanics,2011,32(Supp.1):155–159
Online since: November 2012
Authors: Hui Mei Zhang, Yuan Liang, Chuan Gao Chen, Hai Bo Cao
Analysis on coupling of temperature field and stress field
for tunnel surrounding rock in cold region
Huimei Zhang 1,a, Yuan Liang 1,b, Chuangao Chen1,c and Haibo Cao 1,d
1Department of Mechanics, Xi¢an University of Science and Technology, Xi¢an, Shaanxi 710054, China
azhanghuimei68@163.com, blyevat@163.com, c309014445@163.com, dcaohaibo501@163.com
Keywords: Rock, Coupling, Theoretical model, Numerical calculation
Abstract.
The physical and mechanical parameters of surrounding rock are shown in Table 1.
Table 1 The physical and mechanical parameters of surrounding rock physical E quantity Mpa kg/m3 /J.m-3.℃-1 /J.m-3.℃-1 /W.m-1.
OC-1 /W.m-1.
Key Engineering Materials,2006,306-308:1 479–1 484
The physical and mechanical parameters of surrounding rock are shown in Table 1.
Table 1 The physical and mechanical parameters of surrounding rock physical E quantity Mpa kg/m3 /J.m-3.℃-1 /J.m-3.℃-1 /W.m-1.
OC-1 /W.m-1.
Key Engineering Materials,2006,306-308:1 479–1 484
Online since: July 2017
Authors: Alexandr Sergeevich Inozemtcev, Evgeniy Valerjevich Korolev
Intense increment of values at short duration is observed at stage 1.
Fig. 1.
References [1] J.
-H.Yang, Ultra high performance cement-based composites incorporating low dosage of plasma synthesized carbon nanotubes // Materials & Design. 108 (2016) 479-487. doi: 10.1016/j.matdes.2016.07.016
Stroitel'stvo. 1 (2004) 20-23.
Fig. 1.
References [1] J.
-H.Yang, Ultra high performance cement-based composites incorporating low dosage of plasma synthesized carbon nanotubes // Materials & Design. 108 (2016) 479-487. doi: 10.1016/j.matdes.2016.07.016
Stroitel'stvo. 1 (2004) 20-23.
Online since: August 2014
Authors: Chun Tao Wang, Hui Lv
Tab.1 Concrete mix proportion
Serial number
water-
cement ratio
Sand rate
Consumption of each material [kg/m3]
cement
Tap water
fine aggregate
natural coarse aggregate
recycled coarse aggregate
C-1
0.43
32
455
195
504
1122
0
C-2
0.43
32
455
195
504
1122
0
C-3
0.43
32
455
195
504
1122
0
RC-1
0.43
32
455
195
504
561
561
RC-2
0.43
32
455
195
504
561
561
RC-3
0.43
32
455
195
504
561
561
RC-4
0.43
32
455
195
504
0
1122
RC-5
0.43
32
455
195
504
0
1122
RC-6
0.43
32
455
195
504
0
1122
C-1 to C-3;ordinary concrete
RC-1 to RC-3;recycled concrete,50% recycled coarse aggregate
RC-4 to RC-6;recycled concrete,100% recycled coarse aggregate
test and analysis of measured data
The failure process of test block.
All-gravel concrete stress - strain curves -4000 -3500 -3000 -2500 -2000 -1500 -1000 -500 0 500 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Stress Strain C-1 Strain C-2 Strain C-3 Strain Stress Semi-gravel concrete test blocks stress - strain curves -4000 -3500 -3000 -2500 -2000 -1500 -1000 -500 0 500 1 3 5 7 9 11 13 15 17 19 Stress Stress Stress RC-4 Strain RC-5 Strain RC-6 Strain Fig. 3.1 Gravel concrete stress strain curve Fig. 3.2 Gravel concrete stress strain curve `Test block full of pebbles stress - strain curves -4500 -4000 -3500 -3000 -2500 -2000 -1500 -1000 -500 0 500 1 3 5 7 9 11 13 15 17 19 21 Stress Strain Stress RC-1 Strain RC-2 Strain RC-3 Strain Fig. 3.3 Pebble concrete stress strain curve During the experiment , the stress strain curve of each test block were similar to each other, the stress strain curve of all of pebble
References [1]Shun.yuedong,Zhou.deyuan.
Shanxi Architecture,2008,(12):1-2.
[5]Hogenestad E Concrete Stress Distribution in Untimate Strength Design[J].ACI,Dec 1955.455~479 [6]Jiang.jianjing, Li.jie, Jin.weiliang Higher concrete structure theory [M].
All-gravel concrete stress - strain curves -4000 -3500 -3000 -2500 -2000 -1500 -1000 -500 0 500 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Stress Strain C-1 Strain C-2 Strain C-3 Strain Stress Semi-gravel concrete test blocks stress - strain curves -4000 -3500 -3000 -2500 -2000 -1500 -1000 -500 0 500 1 3 5 7 9 11 13 15 17 19 Stress Stress Stress RC-4 Strain RC-5 Strain RC-6 Strain Fig. 3.1 Gravel concrete stress strain curve Fig. 3.2 Gravel concrete stress strain curve `Test block full of pebbles stress - strain curves -4500 -4000 -3500 -3000 -2500 -2000 -1500 -1000 -500 0 500 1 3 5 7 9 11 13 15 17 19 21 Stress Strain Stress RC-1 Strain RC-2 Strain RC-3 Strain Fig. 3.3 Pebble concrete stress strain curve During the experiment , the stress strain curve of each test block were similar to each other, the stress strain curve of all of pebble
References [1]Shun.yuedong,Zhou.deyuan.
Shanxi Architecture,2008,(12):1-2.
[5]Hogenestad E Concrete Stress Distribution in Untimate Strength Design[J].ACI,Dec 1955.455~479 [6]Jiang.jianjing, Li.jie, Jin.weiliang Higher concrete structure theory [M].
Online since: August 2016
Authors: Bryan B. Pajarito, Jopeth M. Ramis
MATERIALS AND METHODS
1 μm
(B)
(A)
Electrospinning of PVAG nanofibers.
Figure 1.
The spectrum for gelatin granules prior to electrospinning shows that the band is formed by four individual peaks; situated at amide-A and free water (3282 cm-1), amide-I (1630 cm-1), amide-II (1547 cm-1) and amide-III (1239 cm-1).
REFERENCES [1] N.
Pharm.Vol. 479 (2015), p. 252-260
Figure 1.
The spectrum for gelatin granules prior to electrospinning shows that the band is formed by four individual peaks; situated at amide-A and free water (3282 cm-1), amide-I (1630 cm-1), amide-II (1547 cm-1) and amide-III (1239 cm-1).
REFERENCES [1] N.
Pharm.Vol. 479 (2015), p. 252-260