Thermal Evaluation of the Use of Porous Ceramic Plates on Ventilated Façades – Part I: Effect of Composition and Firing Temperature on Porosity and Bending Strength

2021 ◽  
Author(s):  
S. M. dos S. Pizzatto ◽  
F. Pizzatto ◽  
E. Angioletto ◽  
S. Arcaro ◽  
E. Junca ◽  
...  
Keyword(s):  
Firing Temperature ◽  
Bending Strength ◽  
Porous Ceramic

Environmental Friendly Ceramic Building Materials

2016 ◽  
Vol 690 ◽  
pp. 150-155 ◽  
Author(s):  
Toyohiko Sugiyama ◽  
Keiji Kusumoto ◽  
Masayoshi Ohashi ◽  
Akinori Kamiya
Keyword(s):  
High Performance ◽  
Building Materials ◽  
Bending Strength ◽  
Low Cost ◽  
Porous Ceramic ◽  
Ceramic Materials ◽  
Porous Ceramics ◽  
Heat Island ◽  
Solar Reflectance ◽  
Ceramic Building

The global warming is one of the most serious problems. The decrease of CO2 emissions in our daily life is an important subject today. Recently, an application of water retentive materials as a paving material has attracted a great deal of attention in Japan. This material is effective for reducing heat island phenomenon, which is also a recent problem in many cities in Japan. Water retained in the material during rainfall evaporates when heated by sunshine. The latent heat absorbed by evaporating water works to cool the surroundings. The water retentive ceramic products are expected to be useful for building materials as well as pavements. Several performances are required on the water retentive ceramics when it is used as building materials. Its cost and quality are the important factors. Porous ceramic materials formed by pressing without firing is one of ideal low cost and eco-friendly candidates. The porous ceramics is also expected to be produced from recycled ceramic materials. By optimizing its composition and forming method, a water retentive material with high performance was developed. The trial product had the properties as follows; fracture toughness: 1300N, bending strength: 175N/cm, water absorption: larger than 30%, and precision in size (length): +-0.5mm for 150mm. The product showed also enough frost resistance. In this paper, the fundamental properties of the porous ceramics prepared without firing are discussed with referring to the results of the field experiments.Another subject recently studied by several tile manufactures in Japan is the glazed tile with high solar reflectance. The exterior walls covered with such a high solar reflectance tile keeps the surface temperature of the wall lower under the strong sunshine of summer. It is effective against heat-island phenomenon. In this paper, the outline of the research results on visible and infrared reflectance of many kinds of glazes is also discussed.

Preparation of SiC Porous Ceramic for Application in Filter Plate Supports

2016 ◽  
Vol 848 ◽  
pp. 237-242 ◽  
Author(s):  
Qi Fu Bao ◽  
Wei Xia Dong ◽  
Jian Er Zhou ◽  
Xiao Chun Hu
Keyword(s):  
Bending Strength ◽  
Porous Ceramic ◽  
Heavy Metal Concentration ◽  
Close Packing ◽  
Production Costs ◽  
Ceramic Filter ◽  
Molding Pressure ◽  
High Porosity ◽  
Pore Former ◽  
Average Pore

In order to improve the efficiency of solid-liquid separation, dewatering and filtration, as well as to reduce the loss of concentrate and production costs, silicon carbide porous ceramic filter plate with high porosity and high bending strength was prepared by using the particles close packing method adding proper amount of adhesives and sintering additives at 1450 oC. The porosity of the fired samples was evaluated by Archimedes law. The morphology and properties of the samples were characterized. Effects of SiC grains gradation, pore formers content, molding pressure and soaking time on the bending strength and porosity of ceramic filter plate was studied. SiC porous ceramic composition was prepared by mixing 90wt% and 10wt% SiC powders with D50 of 200.7 μm and 312.6 μm, respectively, 4% walnut powder as pore former and 5% Kaolin clay as binder. The sample was pressured at 8 MPa and fired at 1450 oC for 30 min, and endowed with 6-8 μm of the average pore diameter, 41% of the porosity and 11 MPa of the bending strength, respectively, which is especially not easy to plug hole. The obtained results can be applied in ceramic filter core parts for heavy metal concentration.

scholarly journals Porous Ceramics Membrane Preparation from Ternary Mixtures of Ranong Kaolin, Calcium Carbonate and Silica

2017 ◽  
Vol 9 (1) ◽  
Author(s):  
B. Darunee ◽  
C. Nucharee ◽  
B. Tripob
Keyword(s):  
Calcium Carbonate ◽  
Bending Strength ◽  
Pure Water ◽  
Porous Ceramic ◽  
Water Flux ◽  
Slip Casting ◽  
Weight Fraction ◽  
Porous Ceramics ◽  
Ternary Mixtures ◽  
Casting Technique

Porous ceramics membranes were prepared from ternary mixtures of Ranong kaolin, calcium carbonate and silica using slip casting technique. Totally 10 different composition mixtures were selected from the ternary diagram of CaCO3 : SiO2 : Clay with weight fraction of 0–0.19 : 0.28–0.47 : 0.52–0.71, respectively. The ceramic paste was first fired at 800°C and then sintered at temperatures of 1200, 1250 and 1300°C. The results show that firing temperature above 1200°C is probably too high to prepare the porous ceramics of the studied compositions. The porosity less than 26% is obtained from the samples sintered at 1250–1300°C. The highest porosities of more than 40% are observed from the samples sintered at 1200°C with the weight fraction of clay, calcium carbonate and silica between 0.524–0.562, 0.076–0.152, and 0.310–0.394, respectively. In this range of compositions, the linear shrinkage and water absorption is about 3% and 22%, respectively, while the bending strength is between 28–30 MPa. The pure water flux of samples prepared from mixture formula 9 sintered at 1200°C ranges between 52.4 and 368.8 L/m2.h at the operating pressures 30–120 kPa, indicating that the mixture compositions nearby the formula 9 are the best for porous ceramic production using Ranong kaolin.

scholarly journals Porosity Control and Mechanical Properties of Porous Ceramic Material from Plered Region

2018 ◽  
Vol 159 ◽  
pp. 02004
Author(s):  
S. Sulistyo ◽  
Rizky
Keyword(s):  
Mechanical Properties ◽  
Bending Strength ◽  
Porous Ceramic ◽  
Bending Test ◽  
Rice Starch ◽  
Ceramic Product ◽  
Ceramic Tiles ◽  
Pore Former ◽  
Sintered Ceramic ◽  
Three Point Bending

Plered region is located in around Purwakarta area, west java, Indonesia. Plered is famous as ceramic product especially ceramic tiles, decorative ceramics, tableware and roof tiles. This paper investigated the manufacturing of porous ceramic from Plered and evaluated the mechanical properties especially bending strength. The investigation include the controlling of porosity using pore former during manufacturing, investigation of chemical composition and evaluated the fracture strength using bending test. Evaluation of porosity ceramic product use an archimedes method and scanning electron microscopy and the bending strength of porous ceramic using three point bending test. The porous ceramic was tailored by using compaction process and sintering process at temperature of 1250 C, the pore former (rice starch) was added on the material ceramic to control of porosity. The bending strength use standard ASTM C1161-13 which sample has cross section of 6x8 mm2 and 90 mm long. The results show that the porosity increases with the number of pore formers in a mixture of clay, the porosity of sinter ceramic was 7 vol%,12 vol%, 17 vol% at using pore former 5 wt%, 15 wt% and 25 wt % respectively. The bending strength of sinter ceramic was declined with increasing porosity. The bending strength of sintered ceramic was 58 MPa, 49.5 MPa and 34.7 MPa at porosity of 7 vol%, 9 vol% and 14 vol% respectively.

scholarly journals Preparation of Fly Ash-Based Porous Ceramic with Alumina as the Pore-Forming Agent

Ceramics ◽  
2019 ◽  
Vol 2 (2) ◽  
pp. 286-295
Author(s):  
Yulong Yang ◽  
Fengli Liu ◽  
Qibing Chang ◽  
Zhiwen Hu ◽  
Qikun Wang ◽  
...  
Keyword(s):  
Phase Composition ◽  
Fly Ash ◽  
Mechanical Strength ◽  
Pore Structure ◽  
Pore Size ◽  
Bending Strength ◽  
Low Cost ◽  
Porous Ceramic ◽  
Alumina Content ◽  
On Line

Low-cost porous ceramic from fly ash with alumina as the pore-forming agent was produced. The effect of the alumina content on line shrink, bulk density, mechanical strength, porosity, and phase composition of porous ceramic were investigated in detail. The results showed that the addition of alumina can help to improve the porosity and then it can change the pore structure of porous ceramic. Meanwhile, the addition of alumina can react with SiO2 in fly ash which can form the mullite. With the increase of alumina content, the content of quartz decreased gradually, while the alumina and mullite increased. Furthermore, the pore size becomes uniform and the permeability increased gradually. After sintering at 1250 ℃ for 0.5 h, the porous ceramic has been obtained the bending strength of ≥ 35MPa and the porosity of ≥ 28% with the addition content of alumina (25 wt%).

Effect of Firing Temperature on Bending Strength of Porcelains for Tableware

1992 ◽  
Vol 75 (7) ◽  
pp. 1801-1806 ◽  
Author(s):  
Yuichi Kobayashi ◽  
Osamu Ohira ◽  
Yasuo Ohashi ◽  
Etsuro Kato
Keyword(s):  
Firing Temperature ◽  
Bending Strength

scholarly journals Production and Characterization of Porous Ceramics From Coal Fly Ash and Clay

2017 ◽  
Vol 14 (3-4) ◽  
Author(s):  
Biljana Angjusheva ◽  
Emilija Fidancevska ◽  
Vojo Jovanov
Keyword(s):  
Fly Ash ◽  
Power Plants ◽  
Bending Strength ◽  
Coal Fly Ash ◽  
Porous Ceramic ◽  
Thermal Power ◽  
Construction Materials ◽  
Porous Ceramics ◽  
Significant Research ◽  
Different Content

The disposal of coal fly ash obtained in thermal power plants presents the general problem all over the world. Significant research on the utilization of fly ash has been carried out in the area of construction materials. The aim of this study was to develop porous ceramics based on coal fly ash and clay (60wt.%clay and 40wt.% fly ash). Three types of pore creators: two types of wood cutting (Quercus and Facus sylvatica) and C-powder were used for creating of the porous ceramics. The mixtures based on fly ash and clay and different content of pore creators (2, 5, 10 and 20wt.%) were consolidated (P=45 MPa, T = 900, 1000, 1050 and 1100oC/1h) to obtain porous ceramic (PC). The results indicate that the properties of the porous ceramics depend on the type and content of the pore creators. Furthermore, the sintering temperature was found to be main factor affecting the properties of the sintered products. The maximal bending strength (26 MPa) was achieved by using 2wt% P3 (C-powder) and the porous ceramics has the density and porosity of 1.90g/cm3 and 22%, respectively. By using the highest content (20wt.% ) of each pore creator (P1, P2 and P3) the lowest bending strength cca 5 MPa was achieved and the variation of the density and porosity was in the range from 1.22 to 1.32 g/cm3 and 44 to 48%, respectively. Water absorption, durability and the microstructure of the obtained porous ceramics are also reported in this paper.

scholarly journals Utilization of Rice Husk, an Abundant and Inexpensive Biomass in Porous Ceramic Membrane Preparation: A Crucial Role of Firing Temperature

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Tran Thi Ngoc Dung ◽  
Vu Nang Nam ◽  
Tran Thi Nhan ◽  
Bui Nguyen Hoang ◽  
Do Le Thanh Hung ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Rice Husk ◽  
Firing Temperature ◽  
Ceramic Membrane ◽  
Porous Ceramic ◽  
Filtration Efficiency ◽  
Mullite Formation ◽  
Bacterial Removal ◽  
Porous Ceramic Membrane

The influence of firing temperature on characteristics and bacterial filtration of the porous ceramic membrane prepared from rice husk (20 wt%) and kaolin has been investigated. As firing temperatures increased from 900 to 1100°C, the compressive strength of membrane increased from 555.3 N/cm2 to 2992.3 N/cm2, whereas the porosity decreased from 49.4 to 30.2% due to structural condensation and mullite formation. The condensation caused pore contraction that finally improved bacterial removal efficiency from ~90% to 99%. The results suggested that the porous ceramic membrane prepared from rice husk and kaolin should be fired at ~1050°C to attain both strength and filtration efficiency.

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