Influence of Sintering Temperature on the Properties of Porous Quartz Ceramics via the Atmospheric Pressure Sintering Method

2011 ◽  
Vol 415-417 ◽  
pp. 1009-1012
Author(s):  
Jie Guang Song ◽  
Fang Wang ◽  
Yin Yan Ju ◽  
Ming Han Xu ◽  
Shi Bin Li
Keyword(s):  
Atmospheric Pressure ◽  
Yangtze River ◽  
Sintering Temperature ◽  
Raw Material ◽  
Price Ratio ◽  
The Yangtze River ◽  
River Sand ◽  
Sintering Method ◽  
Quartz Ceramics ◽  
Porous Quartz

Porous quartz ceramics were produced using river sand from the Yangtze River in China as the raw material via the atmospheric pressure sintering method. The influence of the sintering temperature on the density, the porosity, the porous structure and the outside shape of ceramics were investigated in this paper.The conclusions show that the sintering temperature increased, the microstructure of the samples changed accordingly and the density increased, while the porosity decreased, the micropores edge gradually become smooth. The optimum sintering temperature of porous quartz ceramics was obtained at 1100 °C as determined by an analysis of the performance price ratio of the porous quartz ceramics, the density is 1.25g/cm3, the porosity is 49.5%, the outside shape is regular, the micropore edge are smooth.

Synthesis of O'-SiAlON/SiC Ecomaterials by Using Non-Traditional Resources: Yangtze River Sand

2009 ◽  
Vol 610-613 ◽  
pp. 267-273 ◽  
Author(s):  
Hong Shun Hao ◽  
Li Hua Xu ◽  
Ming Liu ◽  
Xiao Meng Zhang ◽  
Jian Ying Yang ◽  
...  
Keyword(s):  
Carbothermal Reduction ◽  
Yangtze River ◽  
Mass Fraction ◽  
Sintering Temperature ◽  
Ph Value ◽  
Orthogonal Design ◽  
Raw Material ◽  
Sem Images ◽  
River Sand ◽  
Sic Composites

O'-SiAlON/SiC ecomaterials were synthesized by using the Yangtze River sand that containing abundant Si and Al elements as the major raw material with minor additives through the carbothermal reduction nitridation route combined with colloidal process. This study realized the conversion of ecomaterials from non-traditional resources, Yangtze River sand. Orthogonal design was adopted to optimize the colloidal process parameters. The green compact with the largest bulk density was obtained when the solid volume loading is 50%, the addition mass fraction of SL is 0.8%, the addition mass fraction of CMC is 0.05%, the ball milling time is 10 h, the pH value is 9 and particle size distribution is multi-peak in the colloidal process. The effects of reduction agent, flowing rate of N2, sintering temperature during carbothermal reduction nitridation process on the microstructure of as-fabricated SiAlON materials were explored. The XRD results indicated that when sintering temperature is 1450°C, maintaining time is 6 h, flowing rate of N2 is 1.0 L/min and carbon black is selected as reduction agent, O-SiAlON/SiC composites was successfully synthesized. The SEM images showed the densificated microstructure and uniform grains with the short column shape.

Preparation and Characterization of Quartz Porous Ceramic Materials Using the Yangtze River Sand

2013 ◽  
Vol 804 ◽  
pp. 52-56
Author(s):  
Yan Ping Feng ◽  
Zhi Wen Qiu ◽  
Xiao Bin Ma ◽  
Lei Zhao ◽  
Xin Chao Chen ◽  
...  
Keyword(s):  
Yangtze River ◽  
Raw Materials ◽  
Porous Ceramic ◽  
Ceramic Materials ◽  
Porous Ceramics ◽  
Low Grade ◽  
The Yangtze River ◽  
Insulation Property ◽  
River Sand ◽  
Porous Ceramic Materials

In order to lay raw materials foundation for increasing the performance of insulating brick with the low grade quartz sand along the Yangtze River, the quartz porous ceramic materials was researched in this paper. The results show the porosity of the porous quartz ceramics decreased with an increase in the sintering temperature. The pore is like the bowl shape, and the pore is closed pore, which is help to improve the heat insulation property of quartz porous ceramics. The CaSiO4 is produced in the ceramics after sintering processing. The shape is better, and the microstructure is circular and symmetrical pore, which is help to improve the mechanical property of quartz porous ceramics.

Sand Mining Monitoring andAnalysis of the Yangtze River Based on Multi-Beam Bathymetry

2013 ◽  
Vol 779-780 ◽  
pp. 1441-1444
Author(s):  
Xian Quan Han ◽  
Cheng Xing ◽  
Yong Tan
Keyword(s):  
Yangtze River ◽  
Yangtze River Basin ◽  
The Yangtze River ◽  
Sand Mining ◽  
River Sand ◽  
Detection Technology ◽  
The Yangtze River Basin ◽  
Working Principle ◽  
Sand And Gravel

Multi-beam bathymetry is a modern underwater detection technology which has been widely used in the fields of underwater detection.We present the working principle and characteristics of this method and introduce its application to the monitoring of river sand and gravel resources.We also discuss its techniques and data processing process. Through case study in a sand mining segment in the Yangtze River basin,we demonstrate the effectiveness and reliability of applying this method to the quantitative.

Preparation of Granular Sorbent (GS) from Red Mud by Thermal Activation and its Application for Cu2+ Removal

2013 ◽  
Vol 641-642 ◽  
pp. 294-298
Author(s):  
Qin Yan Yue ◽  
Xiao Juan Wang ◽  
Ya Qin Zhao ◽  
Xiao Wei Zhang ◽  
Bao Yu Gao ◽  
...  
Keyword(s):  
Red Mud ◽  
Thermal Activation ◽  
Sintering Temperature ◽  
Raw Material ◽  
Optimal Conditions ◽  
Optimal Parameters ◽  
Single Experiment ◽  
Sintering Time ◽  
Key Factor ◽  
Sintering Method

In this study, granular sorbent (GS) which was prepared from red mud, clay and coal by sintering method was studied. With the aim of determining the optimal parameters for GS production, the influences of several important factors (including raw material ratio, sintering temperature and sintering time) on the adsorption capacity of GS for Cu2+ removal were evaluated in the single-experiment. The results indicated that the raw material ratio was the key factor that influenced the property of GS. The optimal conditions for GS preparation were as follows: the raw material ratio (red mud: clay: coal) of 85:10:5, sintering temperature of 400 °C and sintering time of 20 min.

Fabrication of Unfired Porous Quartz Brick Used the River Sands from the Yangtze River in China

2011 ◽  
Vol 418-420 ◽  
pp. 465-468
Author(s):  
Jie Guang Song ◽  
Fang Wang ◽  
Da Ming Du ◽  
Yang Liang Li ◽  
Gang Chang Ji
Keyword(s):  
Porous Structure ◽  
Compression Strength ◽  
Yangtze River ◽  
Homogeneous Distribution ◽  
Low Grade ◽  
The Yangtze River ◽  
Foaming Agent ◽  
Quartz Sands ◽  
Porous Quartz ◽  
Closed Pore

The insulating brick is prepared used low grade quartz sand along the Yangtze River, and the mechanism of porous structure contolment is researched, which lay technological foundation for increasing the performance of insulating brick. The results show the porosity of unfired porous quartz bricks is decreased with increasing the content of quartz sands. When the content of foaming agent is beyond 0.5%, the porosity of unfired porous bricks is increased with increasing the content of foaming agent. When the ratio of materials and water is above 1:1.1, the porosity of unfired porous bricks is decreased with increasing the content of adding water. Through optimizing the technology that using 60% quartz sands, 39% cement, 1% foaming agent and the ratio of materials and water for 1:1.1 are mixed, the unfired porous quartz bricks is produced, the density is 0.628 g/cm3, the porosity is 74.586% and the compression strength is 1.9 MPa, the porous structure of brick is homogeneous distribution, the pore is closed pore.

Yiling Multi-span Cable-Stayed Bridge over the Yangtze River

2004 ◽  
Vol 88 (8) ◽  
pp. 59-64
Author(s):  
Changyu Shao ◽  
Qinger Deng
Keyword(s):  
Yangtze River ◽  
The Yangtze River ◽  
Cable Stayed Bridge
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