Tuning pore structure of corrosion resistant solid-state-sintered SiC porous ceramics by particle size distribution and phase transformation

A ceramic permeable brick was selected for study in a device that was designed to fully investigate the process and characteristics of clogging in permeable bricks. In order to evaluate the permeability influenced by clogging, a simulated rainfall was filtered through the permeable brick placed in an innovative device. The macroscopic and microscopic changes in the brick and the filtrate were all measured to fully investigate the causes and process of clogging. Then, the mechanism of clogging in the permeable brick pores was further discussed. The results showed that the clogging risk of permeable brick was extremely high, and it can result in a complete clogging in only 5–10 years under the experimental conditions. The permeability coefficient and porosity both decreased exponentially with the increase in filtrate, which was attributed to the clogging of the internal pore structure due to particle interception. The chord size distribution results stressed that the blockage mainly occurred in the upper layer pores in the range of 0.5–1.5 mm, which is relatively sensitive to clogging due to the particle size distribution in rain water. The particle size distribution of the influent and effluent indicated that the clogging process could completely remove particles larger than 88 µm but showed variable removal efficiency for particles with sizes of 20–88 µm. This research offers new insight into the clogging of permeable bricks and provides theoretical guidance for restoring the brick permeability.

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Effect of particle size distribution on filter cake pore structure and coal slurry dewatering process

International Journal of Coal Preparation and Utilization ◽

10.1080/19392699.2020.1781830 ◽

2020 ◽

pp. 1-16

Author(s):

Qiming Zhuo ◽

Wenli Liu ◽

Hongxiang Xu ◽

Donghui Wang

Keyword(s):

Particle Size ◽

Particle Size Distribution ◽

Pore Structure ◽

Size Distribution ◽

Filter Cake ◽

Coal Slurry ◽

Effect Of Particle Size

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Particle size distribution effects in an FEM model of sintering porous ceramics

Materials Science and Engineering A ◽

10.1016/s0921-5093(02)00237-x ◽

2003 ◽

Vol 341 (1-2) ◽

pp. 247-255 ◽

Cited By ~ 17

Author(s):

Ken Darcovich ◽

Laurent Béra ◽

Kazunari Shinagawa

Keyword(s):

Particle Size ◽

Particle Size Distribution ◽

Size Distribution ◽

Porous Ceramics ◽

Fem Model

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The Investigations on Luminescence Characteristics and Influence of Doping and Co-Doping Different Rare Earth Ions in White Phosphorescence Materials Having Different Luminescent Centers

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.90.133 ◽

2014 ◽

Vol 90 ◽

pp. 133-140

Author(s):

Erkul Karacaoglu ◽

Bekir Karasu ◽

Esra Öztürk

Keyword(s):

Particle Size ◽

Rare Earth ◽

Solid State ◽

Particle Size Distribution ◽

Size Distribution ◽

Rare Earths ◽

Solid State Reaction ◽

Solid State Reaction Method ◽

Reaction Method ◽

Luminescence Characteristics

The Akermanite type alkaline earth silicate Ca2MgSi2O7 activated by different types of rare earths was prepared by the conventional solid state reaction method under weak reductive atmosphere. The phase formation, particle size distribution, particle morphologies and photoluminescence properties of the samples have been investigated respectively. The comparative results of SEM and laser particle size analysis revealed that the relatively regular morphology, smaller particle size distribution could be achieved for the phosphors synthesized by the solid state reaction method including dry-ground after which powders were sieved below 170 meshes. The effects of rare earth oxides; Nd2O3, Pr6O11, Ce2O3 and Sm2O3 on the luminescence properties of the host material, Ca2MgSi2O7, were studied. Remarkable enhancement and novel color emitting including white in luminescence characteristics of host material were observed as a result of doping the mentioned rare-earths were doped.

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