Research on the hard brittle clay shale water content and the mechanical strength distribution rule

2016 ◽  
pp. 607-610
Author(s):  
Guo-Ren Lu ◽  
Ming Liu ◽  
Le-Wen Zhang ◽  
Hao Zhou
Keyword(s):  
Mechanical Strength ◽  
Water Content ◽  
Strength Distribution ◽  
Clay Shale ◽  
Distribution Rule

scholarly journals Fabrication of Porous Al2O3 Ceramics with Submicron-Sized Pores Using a Water-Based Gelcasting Method

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1784 ◽  
Author(s):  
Zhihong Yang ◽  
Nan Chen ◽  
Xiaomei Qin
Keyword(s):  
Mechanical Strength ◽  
Water Content ◽  
Sintering Temperature ◽  
Al2o3 Content ◽  
Volume Fractions ◽  
Pore Sizes ◽  
Water Based ◽  
Low Levels ◽  
Median Pore

The gelcasting method is usually employed to fabricate relatively dense ceramics. In this work, however, porous Al2O3 ceramics with submicron-sized pores were fabricated using the water-based gelcasting method by keeping the Al2O3 content at low levels. By controlling the water content in the ceramic slurries and the sintering temperature of the green samples, the volume fractions and the size characteristics of the pores in the porous Al2O3 can be readily obtained. For the porous Al2O3 ceramics prepared with 30 vol.% Al2O3 content in the slurries, their open porosities were from 38.3% to 47.2%, while their median pore sizes varied from 299.8 nm to 371.9 nm. When there was more Al2O3 content in the slurries (40 vol.% Al2O3), the porous Al2O3 ceramics had open porosities from 37.0% to 46.5%, and median pore sizes from 355.4 nm to 363.1 nm. It was found that a higher sintering temperature and Al2O3 content in the slurries increased the mechanical strength of the porous Al2O3 ceramics.

PEMFC Development at Asahi Glass Co., Ltd.

1999 ◽  
Vol 575 ◽  
Author(s):  
M. Yoshitake ◽  
E. Yanagisawa ◽  
T. Naganuma ◽  
Y. Kunisa
Keyword(s):  
Ion Exchange ◽  
Mechanical Strength ◽  
Water Content ◽  
Hydrogen Permeation ◽  
Specific Resistance ◽  
Gas Permeability ◽  
Cell Voltage ◽  
Free Cell ◽  
Gas Permeation ◽  
Membrane Thickness

ABSTRACTPerfluorinated ion exchange membranes were studied and the membrane technology for PEMFC has been developed. Thermal stability, mechanical strength, water content, AC specific resistance and gas permeability were measured. The influence of membrane thickness on gas permeability and the influence of incorporation of cations on water content and AC specific resistance of Flemion® and Nafion® 117 were estimated. Gas permeation rates of the membranes decreased in inverse proportion to the increase of the membrane thickness and gas permeability coefficients were nearly constant and independent of the thickness. Hydrogen permeation rates of Flemion®S at 70°C were converted to 2.1 mA/cm2 as cunent density. Flemion®R-electrode assembly showed to maintain stable perfonnance for over 3,500hr. Furthermore, it was found that usage of thinner membranes or one with higher ion-exchange capacity gave not only lower intemal cell voltage but also higher iR-free cell voltage. PTFE-yam embedded type membrane (Flemion®Mc and Sc) and PTFE-flbril dispersed type (Flemion®R12) was examined to afford improvement in mechanical strength at moist and high temperature atmosphere. Flemion®Sc (80!am) was examined to give high cell performance of 0.67V at 0.5A/cm2, 80°C, I ata. Flemior®Mc-electrode assembly was examined to keep stable performance during the life test of over 1,500hr.

Study on the Clay Mechanical Characteristics of “Ripping Up the Bottom” in the Yellow River

2012 ◽  
Vol 212-213 ◽  
pp. 108-112 ◽  
Author(s):  
Wen Sheng Dong ◽  
Xiu Fang Jiang ◽  
Xian Feng He ◽  
Ying Ying Zai
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Mechanical Strength ◽  
Water Content ◽  
Critical Condition ◽  
Mechanical Characteristics ◽  
Yellow River ◽  
The Yellow River ◽  
Dry Density ◽  
The Relationship

Aim to the high sandy river “ripping up the riverbed” phenomenon, by experiment, analyzing the relationship between clay dry density, water content, plasticity index and its shear strength, and its mechanical properties. Create the conditions for studying clay mechanical strength and the critical condition of “bottom tearing scour”.

Experimental Investigation on the Physical and Mechanical Features of Clay Shale in Bayingobi Basin of Inner Mongolia

2014 ◽  
Vol 580-583 ◽  
pp. 879-882
Author(s):  
Hai An Liang ◽  
Qing Rui Lu ◽  
Shi Jun Chen ◽  
Hai Yang Hu
Keyword(s):  
Mechanical Strength ◽  
Inner Mongolia ◽  
Mineral Content ◽  
Mechanical Characteristics ◽  
Friction Angle ◽  
Testing System ◽  
High Mechanical Strength ◽  
Clay Shale ◽  
Clay Rocks ◽  
Physical And Mechanical Characteristics

The basic physical and mechanical characteristics of Clay shale in Bayingobi Basin of Inner Mongolia have been investigated by using supersonic testing system, rock mechanical testing system, and rock triaxial testing system. The results indicate that the deep clay shale of this region is characterized by high density, high mechanical strength, low deformation and strong brittleness. More specifically, according to the tests, because of their relative small particle size, the carbonate grains of clay rocks in this region are distributed more uniformly, and the average clay mineral content is comparatively low, as a result, the deep clay shale of this region are featured by large internal friction angle and high mechanical strength.

Effect of water content on the mechanical strength of dental porcelain

2004 ◽  
Vol 349 ◽  
pp. 200-204 ◽  
Author(s):  
Yong-Keun Lee ◽  
Hye-Yang Park ◽  
June-Sung Shim ◽  
Kyoung-Nam Kim ◽  
Keun-Woo Lee
Keyword(s):  
Mechanical Strength ◽  
Water Content ◽  
Dental Porcelain ◽  
Effect Of Water

Self-reinforcing injectable hydrogel with both high water content and mechanical strength for bone repair

2016 ◽  
Vol 288 ◽  
pp. 546-556 ◽  
Author(s):  
Xiao Bai ◽  
Shaoyu Lü ◽  
Zhen Cao ◽  
Chunmei Gao ◽  
Haogang Duan ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Water Content ◽  
Bone Repair ◽  
High Water ◽  
High Water Content ◽  
Injectable Hydrogel

Characterization of frozen hydrated biological specimens by low-loss EELS

1992 ◽  
Vol 50 (2) ◽  
pp. 1572-1573
Author(s):  
Songquan Sun ◽  
Richard D. Leapman
Keyword(s):  
Water Content ◽  
Direct Method ◽  
Internal Standard ◽  
Dry Weight ◽  
Dark Field ◽  
Protein Solutions ◽  
Subcellular Compartment ◽  
Differential Shrinkage ◽  
Electron Energy Loss

Analyses of ultrathin cryosections are generally performed after freeze-drying because the presence of water renders the specimens highly susceptible to radiation damage. The water content of a subcellular compartment is an important quantity that must be known, for example, to convert the dry weight concentrations of ions to the physiologically more relevant molar concentrations. Water content can be determined indirectly from dark-field mass measurements provided that there is no differential shrinkage between compartments and that there exists a suitable internal standard. The potential advantage of a more direct method for measuring water has led us to explore the use of electron energy loss spectroscopy (EELS) for characterizing biological specimens in their frozen hydrated state.We have obtained preliminary EELS measurements from pure amorphous ice and from cryosectioned frozen protein solutions. The specimens were cryotransfered into a VG-HB501 field-emission STEM equipped with a 666 Gatan parallel-detection spectrometer and analyzed at approximately −160 C.

Sign in / Sign up

Export Citation Format

Share Document