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Online since: August 2014
Authors: Yin Feng Liu, Da Zhao Song, Yu Yao, Bi Yun Fu
., production of HDSJ performance evaluation on the three kinds of polymer, polymer physics and chemistry performance test results are shown in table 1.
Table 1 Polymer physics and chemistry performance test results The name of the polymer APP5 KYPAM HDSJ Solid content(%) 90.1 89.56 91.3 The molecular weight(104) 1200 3000 2500 Degree of hydrolysis(%) 18.2 23.2 25.1 Insolubles content(%) 0.15 0.0992 0.01 Screen mesh coefficient 18.37 53.2 25.6 The filter factor >1.5 >1.5 >1.5 Polymer solution viscosity adaptability In conveying manifold, well spacing, perforation and other mechanical shear and formation of minerals, biochemistry, oxygen degradation under the influence of factors such as[5], the viscosity of experience formula is: (1) In the type: :The ground polymer solution viscosity, mPa•s; :Underground oil viscosity, mPa•s; :Conveying manifold, well spacing, perforation caused by mechanical shear viscosity of polymer solution loss percentage
Cr3+Can be combined with polymer hydroxyl, the formation of hydroxyl bridge, and then form a mesh structure with high stability, response can be expressed[6] for: Cr3++POO- →gel (2) With simulated formation water, according to the chromium than 30:1 (mass ratio), respectively, 3000 mg/L of three kinds of polymer solution, adding 200 mg per litre gel solution retarder, put in 30℃ constant temperature box, at the same time intervals for a period of time with constant temperature water bath brinell display viscometer DV-Ⅲ determination of three kinds of polymer solution viscosity, the determination results as shown in figure 2.
Under the effect of retarder, the gel solution can form slowly the reticular structure of high stability.
Journal of oilfield chemistry, 1996, 13 (1) : 72-75
Online since: April 2014
Authors: Ying Li Liu, Tie Zhu Jiang, Fu Quan Xu, Jun Hong Huan
Compared with embedded anchors, post-installation fixing technique is drill holes on hardened concrete member and put anchor bolts and steels into the holes, in this way connect the new structure with the old one[1-6] using the self-locking principle of anchor bolt(mechanical anchor) and chemical bonding effect(chemical bolts or plant steels).
On this condition, this paper do single, double, four and eight anchors test on experiment on expansion anchors, expanded-base anchors, general chemistry anchors and special upside down chemical anchors.
Specimen Design Doing single, double, four and eight anchors tensile test on experiment on expansion anchors, expanded-base anchors, general chemistry anchors and special upside down chemical anchors.
Table 1 The number of specimens Type of anchor Type of hole expansion anchors expanded- base anchors general chemistry anchors special upside down chemical anchors single anchor 3 3 3 3 double anchor 3 3 Four anchor 3 3 3 3 Eight anchor 3 Notes hspace of double anchors is 160mm, four anchors hspace is170mm(along the board slot) and vertical dimension is 160mm. hspace of eight anchors is 120mm, Margins are all more than 1.5hef, that means marignshave no effect on it.
Technical specification post-installed fastenings in concrete structures (JGJ145-2004) [M].
Online since: April 2015
Authors: M.V. Zhuravlev, G.E. Remnev, B.G. Shubin
The surface structure is shown in Figure 4.
The structure of the substrate surface after VSD treatment.
Smolenskaya, Transformation of organic compounds in barrier discharge plasma, High Energy Chemistry.
Budnyakov, and others, Plasma vapor polymerization of organic substances in barrier discharge, High Energy Chemistry.
Baranov, and others, Ozone formation in transverse discharge in a gas flow, High Energy Chemistry.
Online since: December 2012
Authors: Iis Sopyan, Singh Ramesh, Sharifah Adzila, Siti Farius, Nurfahana Wahab
The large grain growth with coalesced particles arranged in more dense structure can be seen prominently in sintered compacts of M1.
The grain growth with more dense structure was exhibited by sintered compacts of M1 which also in agreement with the relative density obtained.
Hamdi, Synthesis of Nano sized hydroxyapatite powder using sol-gel technique and its conversion to dense and porous body, Indian Journal of Chemistry. 47A (2008) 1626-1631
Sopyan, Low temperature hydrothermal synthesis of calcium phosphate ceramics: effect of Ca excess precursor on phase behaviour, Indian Journal of Chemistry. 48A (2009) 1492-1500
Mostafa, Characterization, thermal stability and sintering of hydroxyapatite powders prepared by different routes, Materials Chemistry and Physics. 94 (2005) 333-341
Online since: April 2021
Authors: Olga V. Lepilova, Svetlana V. Aleeva, Sergey A. Koksharov
Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, Ivanovo, Russia a*ksa@isc-ras.ru, blov@isc-ras.ru, csva@isc-ras.ru Keywords: preparation, hybrid sorbents, modification, Burdock biomass, montmorillonite.
It was founded that bio-modification allowing releasing pectin into the biomass Burdock structure that allow fixing clay mineral particles onto biomass.
X-ray diffraction analysis with a DRON-3 diffractometer was used to determine the interlayer spacing in the Mt structure.
It was founded that the porous structure of «Br-Mt» composites was increased (Table 1).
Krestov Institute of Solution Chemistry of the Russian Academy of Sciences (theme no. 012012 60483).
Online since: November 2007
Authors: S. Mondal, A.K. Banthia
X-ray diffraction shows that molybdenum nitride (MoN) obtained from this method has hexagonal crystal structure.
Assuming hexagonal structure, lattice parameters are calculated.
Molybdenum nitride obtained from pyrolysis has hexagonal type of crystal structure.
Ko, Chemistry of Materials", Vol. 7, 5, (1995) p. 859 [5] H.
Lee, Gene-Hsiang; Peng, Shie-Ming., Advanced Materials, Weinheim, Germany, Vol. 10(17), (1998) p. 1475 [6] Marchand, Roger; Tessier, Franck; DiSalvo, Francis J.; Journal of Materials Chemistry, 9, 1, (1999) p. 297 [7] K.
Online since: September 2008
Authors: Dominic Prime, Shashi Paul
Polymer memory device structure.
Structures of: a) gold nanoparticles (Q-Au), b) 8-hydroxyquinoline, c) styrene monomer.
Oxley, The electroformed metal-insulator-metal structure: a comprehensive model.
Journal of Physical Chemistry B, 2003. 107(28): p. 6668-6697. 14.
Journal of Physical Chemistry B, 2002. 106(1): p. 18-21.
Online since: July 2023
Authors: Rinlee Butch M. Cervera, Christine Mae Macalisang
The structure and morphology of the sintered electrodes were investigated.
For the sintered NiO-ScSZ films, cubic structures of both NiO and ScSZ have been observed from the X-ray diffraction (XRD) patterns.
The effect of precursor particle size on the structure and morphology of the screen-printed NiO-ScSZ films on YSZ was investigated.
Thangadurai, Trends in Electrode Development for Next Generation Solid Oxide Fuel Cells, Journal of Materials Chemistry 4 (2016), p. 17913 [3] F.R.
Kubo, Multi-nanoparticle Model Simulations of the Porosity Effect on Sintering Processes in Ni/YSZ and Ni/ScSZ by the Molecular Dynamics Method, Journal of Materials Chemistry A (2013), p. 43 [7] R.M.
Online since: December 2010
Authors: Iulian Riposan, Mihai Chisamera, Stelian Stan, Michael Barstow, Cristina Militaru
Iron powder was used, with the following chemistry (max. wt.%: 0.02C, 0.05Si, 0.2Mn, 0.015P, 0.015S, 0.3O2, Fe-bal) and characteristics (0.4-1.0 mm grain size, 2.7-3.0 g/cm3 apparent density).
Two distinct zones were found with a fine structure at the margin and a coarser structure central zone, for all irons tested.
Iron powder treatment led to a more defined rosette morphology, with type B and C graphite in the superficial fine structure and limited agglomerated graphite in the coarser structure.
If iron powder treatment led to a stronger development of the dendritic structure, the double treatment favours formation of a fine dendritic structure, at the lowest zone thickness.
Austenite dendrites are visible in the irons tested and appear to reinforce the eutectic cells (Fig. 6), despite the hypereutectic iron chemistries (CE = 4.35-4.45%).
Online since: November 2007
Authors: Zainab Ismail, Christopher Lim, Mei Sheng Zhou, Felicia Goh, Boon Cheng Goh
At the same time, megasonic damage to fragile structures should be kept in mind.
The megasonic cleaning performance using dilute chemistries of HF, SC1 and SC2, with varying concentration of N2, was evaluated.
The wafers were then processed with the chemistry sequence of HF-SC1-SC2 at room temperature, with megasonic turned on during SC1 and SC2 processing.
At full megasonic power of 950W, we observed damage to 90nm active structures (figure 3).
At a reduced megasonic power of 150W and below, no damage to active structures was observed.