Phase-engineering Strategy of ZrO2 for Enhancing the Mechanical Properties of Porous Cordierite Ceramics

2021 ◽  
pp. 103032
Author(s):  
Lulu Wang ◽  
Beiyue Ma ◽  
Xinming Ren ◽  
Chao Yu ◽  
Jialong Tian ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Engineering Strategy ◽  
Cordierite Ceramics ◽  
Phase Engineering ◽  
Porous Cordierite

Influence of Technological Parameters on Thermal Properties of Cordierite Ceramics

2018 ◽  
Vol 762 ◽  
pp. 300-305
Author(s):  
Maris Rundans ◽  
Gaida Sedmale ◽  
Aija Krūmiņa ◽  
Aiga Ivdre
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Thermal Properties ◽  
Sintering Temperature ◽  
Phase Content ◽  
Technological Parameters ◽  
Cordierite Ceramic ◽  
Ceramic Samples ◽  
Cordierite Ceramics ◽  
Porous Cordierite

Porous cordierite ceramic samples have been prepared by using 33% of two carbonate-containing illite clays as substitutes for the necessary synthetic ingredients. The changes of thermal (CTE) and mechanical properties (compressive strength, modulus of elasticity), as well as phase content, apparent porosity and bulk density have been investigated in regards to gradual changes in maximum sintering temperature. It can be affirmed that these properties strongly depend on the thermal parameters of sintering as well as slightly upon differences in chemical composition of composition substitutes.

Near net size sintering of porous cordierite ceramics with excellent properties

2020 ◽  
Vol 826 ◽  
pp. 154121
Author(s):  
Hao Li ◽  
Cuiwei Li ◽  
Linghao Wu ◽  
Han Wang ◽  
Junwen Li ◽  
...  
Keyword(s):  
Cordierite Ceramics ◽  
Porous Cordierite

Effects of oil shale addition and sintering cycle on the microstructure and mechanical properties of porous cordierite-ceramic

2014 ◽  
Vol 40 (7) ◽  
pp. 8937-8944 ◽  
Author(s):  
A. Benhammou ◽  
Y. El Hafiane ◽  
A. Abourriche ◽  
Y. Abouliatim ◽  
L. Nibou ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Oil Shale ◽  
Cordierite Ceramic ◽  
Microstructure And Mechanical Properties ◽  
Porous Cordierite

scholarly journals In Situ DRIFTS Investigation on CeOx Catalyst Supported by Fly-Ash-Made Porous Cordierite Ceramics for Low-Temperature NH3-SCR of NOX

Catalysts ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 496 ◽  
Author(s):  
Shaoxin Wang ◽  
Ziwei Chen ◽  
Beini He ◽  
Zheng Yan ◽  
Hao Wang ◽  
...  
Keyword(s):  
Fly Ash ◽  
Low Temperature ◽  
Photoelectron Spectroscopy ◽  
Active Sites ◽  
Supported Catalyst ◽  
Nh3 Scr ◽  
Scr Catalysts ◽  
Cordierite Ceramics ◽  
Porous Cordierite

A series of CeOx catalysts supported by commercial porous cordierite ceramics (CPCC) and synthesized porous cordierite ceramics (SPCC) from fly ash were prepared for selective catalytic reduction of NOx with ammonia (NH3-SCR). A greater than 90% NOx conversion rate was achieved by the SPCC supported catalyst at 250–300 °C when the concentration of loading precursor was 0.6 mol/L (denoted as 0.6Ce/SPCC), which is more advantageous than the CPCC supported ones. The EDS mapping results reveal the existence of evenly distributed impurities on the surface of SPCC, which hence might be able to provide more attachment sites for CeOx particles. Further measurements with temperature programmed reduction by hydrogen (H2-TPR) demonstrate more reducible species on the surface of 0.6Ce/SPCC, thus giving rise to better NH3-SCR performance at a low-temperature range. The X-ray photoelectron spectroscopy (XPS) analyses reveal that the Ce atom ratio is higher in 0.6Ce/SPCC, indicating that a higher concentration of catalytic active sites could be found on the surface of 0.6Ce/SPCC. The in situ diffused reflectance infrared fourier transform spectroscopy (DRIFTS) results indicate that the SCR reactions over 0.6Ce/SPCC follow both Eley-Rideal (E-R) and Langmuir-Hinshelwood (L-H) mechanisms. Hence, the SPCC might be a promising candidate to provide support for NH3-SCR catalysts, which also provide a valuable approach to recycling the fly ash.

The Effect of Alumina (Al2O3) on the Characteristics of Sintered Mullite-Cordierite Ceramics Synthesized with Kaolin from Naratiwas of Thailand

2016 ◽  
Vol 690 ◽  
pp. 65-70 ◽  
Author(s):  
Santi Pongphot ◽  
Sakdiphon Thiansem
Keyword(s):  
Mechanical Properties ◽  
Thermal Expansion ◽  
Flexural Strength ◽  
Bulk Density ◽  
Suitable Condition ◽  
Length Change ◽  
Hydraulic Press ◽  
Thermal Expansion Coefficients ◽  
Expansion Coefficients ◽  
Cordierite Ceramics

Mullite-cordierite ceramics was prepared by the three composition of talc, kaolin (kaolin from Naratiwas in Thailand) (NT) and alumina. The different amounts of alumina (5, 10, 15 and 20 wt%) were added to produce various mullite-cordierite alumina mixtures which are denoted as NA, NB, NC and ND, respectively. The mixtures were pressed into rectangular shapes by hydraulic press with the pressure of 150 kg/cm2 then sintered at temperature of 1300 °C and 1350 °C for 2 hours. The morphology of the synthesized mullite-cordierite samples were characterized by x-ray diffraction spectroscopy (XRD), and physical-mechanical properties were investigated. Mullite-cordierite was successfully synthesized. The XRD result was represented phases of mullite and cordierite. The NA samples sintered at temperature of 1300 °C indicated the best physical-mechanical properties including bulk density (2.23 g/cm3), flexural strength (44.4 MPa) and thermal expansion coefficients (5.00x10-6). The other NA samples sintered at temperature of 1350 °C exhibited the bulk density, flexural strength and thermal expansion coefficients are 2.21 g/cm3, 47.8 MPa and 4.99 x10-6, respectively. The thermal expansion coefficient of the NT sintered samples have been plotted the length change relative to measuring temperature ranging of 30-1200 °C. The suitable condition of the synthesized mullite-cordierite ceramics is finally obtained the NA samples with 5 percent weight of alumina composition sintered at the temperature of 1350 °C.

scholarly journals Tissue engineering toward temporomandibular joint disc regeneration

2018 ◽  
Vol 10 (446) ◽  
pp. eaaq1802 ◽  
Author(s):  
Natalia Vapniarsky ◽  
Le W. Huwe ◽  
Boaz Arzi ◽  
Meghan K. Houghton ◽  
Mark E. Wong ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tissue Engineering ◽  
Temporomandibular Joint ◽  
Treated Group ◽  
Defect Closure ◽  
Repair Tissue ◽  
Temporomandibular Joint Disc ◽  
Disc Regeneration ◽  
Tmj Disc ◽  
Engineering Strategy

Treatments for temporomandibular joint (TMJ) disc thinning and perforation, conditions prevalent in TMJ pathologies, are palliative but not reparative. To address this, scaffold-free tissue-engineered implants were created using allogeneic, passaged costal chondrocytes. A combination of compressive and bioactive stimulation regimens produced implants with mechanical properties akin to those of the native disc. Efficacy in repairing disc thinning was examined in minipigs. Compared to empty controls, treatment with tissue-engineered implants restored disc integrity by inducing 4.4 times more complete defect closure, formed 3.4-fold stiffer repair tissue, and promoted 3.2-fold stiffer intralaminar fusion. The osteoarthritis score (indicative of degenerative changes) of the untreated group was 3.0-fold of the implant-treated group. This tissue engineering strategy paves the way for developing tissue-engineered implants as clinical treatments for TMJ disc thinning.

Triple-layered, thick glassy grain boundaries in porous cordierite ceramics

2002 ◽  
Vol 50 (3) ◽  
pp. 597-604 ◽  
Author(s):  
K. Kaneko ◽  
N. Honbe ◽  
M. Matsumoto ◽  
Y. Yasutomi ◽  
T. Saitoh ◽  
...  
Keyword(s):  
Grain Boundaries ◽  
Cordierite Ceramics ◽  
Porous Cordierite

Porous cordierite ceramics with the poreformers of different kinds

2018 ◽  
pp. 46-52
Author(s):  
T. A. Habas ◽  
T. V. Vakalova ◽  
K. S. Kamyshnaya ◽  
E. V. D'yakonova ◽  
A. L. Cherepanova ◽  
...  
Keyword(s):  
Pore Formation ◽  
Pore Space ◽  
Porous Ceramics ◽  
Clay Suspension ◽  
Pore Former ◽  
Materials Development ◽  
Cordierite Ceramic ◽  
Organic Clay ◽  
Cordierite Ceramics ◽  
Porous Cordierite

The investigating results are given on the cordierite ceramic porous materials development. The wood waste and the crystalline carbamide were used as the pore-formers. The pore structure analysis showed that all samples had complex pore space composed of numerous elongated connected pores. The best pore formation factors were achieved when using the organic crystalline pore-former. It was demonstrated that nanodispersive metal alumina acted as the strengthening agent in course of the porous ceramics sintering. The organic clay suspension improves the cordierite powder's agglomeration capacity and gives rise to additional nano- and micro-pores.

scholarly journals Preparation and Water Permeation Property of Bimodal Porous Cordierite Ceramics

1992 ◽  
Vol 100 (1157) ◽  
pp. 33-37 ◽  
Author(s):  
Hisao ABE ◽  
Hideya SEKI ◽  
Akio FUKUNAGA ◽  
Makoto EGASHIRA
Keyword(s):  
Water Permeation ◽  
Cordierite Ceramics ◽  
Porous Cordierite
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