Effect of Quartz of Fine Particle Size on Porcelain Properties

Bragança, S.R.; Bergmann, C.P.

doi:10.4028/www.scientific.net/MSF.530-531.493

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Incorporation of Granite Waste into Vitrified Ceramic Tiles
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Brazing of Al₂O₃ with Rapidly Solidified Melt Spun Ni-Cr-P Alloy Ribbons
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X-Ray Diffraction Study of Particulate Tannery Waste Solidified in Cement
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Effects of Raw Materials on the Technological Properties of Brick Compositions Using a Statistical Design Approach
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Effect of Quartz of Fine Particle Size on Porcelain Properties
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Structural Characteristics of the Modern Sintered Tool Materials
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Synthesis and Determination of the Kinetic Parameters for Non-Isothermal Decomposition of Complexes Ln(thd)₃phen
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Synthesis and Kinetic Study by Ozawa Method of the Thermal Decomposition of Complexes Ln(thd)₃phen
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Home Materials Science Forum Advanced Powder Technology VEffect of Quartz of Fine Particle Size on...

Effect of Quartz of Fine Particle Size on Porcelain Properties

Abstract:

The mechanical properties of porcelain are strongly influenced by the generated thermal stress during processing. When quartz particle size is reduced its influence on the technical properties of ceramic products such as tiles and porcelains are changed. In this work, the properties of triaxial ceramics materials were evaluated using quartz of different particle size distribution. It was reported strong variations in mechanical strength and thermal shock strength. Although the cost of milling is increased to reduce quartz particle size, it can be compensated by its implicit advantages. The experimental results were very interesting showing the way that quartz particle size influences the analyzed properties. A significant improving in porcelain strength and thermal strength was obtained.

Info:

Periodical:

Materials Science Forum (Volumes 530-531)

Main Theme:

Advanced Powder Technology V

Edited by:

Lucio Salgado and Francisco Ambrozio Filho

Pages:

493-498

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.530-531.493

Citation:

S.R. Bragança and C.P. Bergmann, "Effect of Quartz of Fine Particle Size on Porcelain Properties", Materials Science Forum, Vols. 530-531, pp. 493-498, 2006

Online since:

November 2006

Authors:

S.R. Bragança, C.P. Bergmann

Keywords:

Porcelain, Strength, Thermal Strength

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References

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Paper TitlePages

Mechanical Properties and Microstructure of Zinc Oxide Varistor Ceramics

Authors: H.N. Yoshimura, André Luiz Molisani, N.E. Narita, J.L.A. Manholetti, J.M. Cavenaghi

Abstract: ZnO varistors are nonlinear resistors used as surge arresters in power transmission and distribution for the protection of electronic devices. Electrical characteristics of these materials have been extensively studied, but their mechanical behavior is not completely understood. It has been suggested that the breakdown of ZnO varistors is related to microstructure heterogeneities and processing defects. These defects are the same that usually control the mechanical strength of ceramic materials. In this work, mechanical properties (flexural strength, fracture toughness, elastic constants, and hardness) of five commercial blocks of ZnO varistors (class I) from different producers were measured and correlated to their microstructure. Pore fraction and size significantly affected the flexural strength.

408

Hardness and Toughness of Aluminum Porcelains Measured by the Indentation Test

Authors: S.R. Bragança, C.P. Bergmann

Abstract: Triaxial porcelains for utilization in electric applications use alumina in its composition replacing quartz in order to improve mechanical strength. This property is a critical parameter for the application of this product. As a consequence of that, in this work, it was evaluated the mechanical strength, analyzing porcelain hardness and toughness by the indentation test, a fast way for measurement of strength. It was studied the different models used in the measurement of these parameters found in literature. It was verified which procedures are better for this type of material, comparing to values of toughness obtained by the method of Fracture Mechanics using notched samples. It is also presented technical characterization and photomicrographs of the analyzed samples.

562

Microstructure and Mechanical Properties of SiC Whisker-Reinforced ZrB₂ Ultra-High Temperature Ceramic

Authors: Ping Hu, Xing Hong Zhang, Jie Cai Han, Song He Meng, Bao Lin Wang

Abstract: SiC whisker-reinforced ZrB2 matrix ultra-high temperature ceramic were prepared at 2000°C for 1 h under 30MPa by hot pressing and the effects of whisker on flexural strength and fracture toughness of the composites was examined. The flexural strength and fracture toughness are 510±25MPa and 4.05±0.20MPa⋅m1/2 at room temperature, respectively. Comparing with the SiC particles-reinforced ZrB2 ceramic, no significant increase in both strength and toughness was observed. The microstructure of the composite showed that the SiC whisker was destroyed because the SiC whisker degraded due to rapid atom diffusivity at high temperature. The results suggested that some related parameters such as the lower hot-pressing temperature, a short sintering time should be controlled in order to obtain SiC whiskerreinforced ZrB2 composite with high properties.

1730

Fracture Toughness of a Silica-Doped Cubic Zirconia (8Y-CSZ)

Authors: Keijiro Hiraga, Koji Morita, Byung Nam Kim, Hidehiro Yoshida

Abstract: In a high-purity 8Y-CSZ, the doping of 0.15 - 5 mass% pure silica introduces a glass phase dispersing uniformly along grain-boundary facets and at multiple junctions. For materials with grain sizes of 0.75 - 2.4 m, the dispersion of the glass phase decreases the elastic modulus, the Vickers hardness and the elastic modulus-to-hardness ratio, whereas it affects little in the fracture toughness measured by a Vickers-indentation method and a single-crack-precracked-beam method. Inspection of crack propagation paths shows that the glass phase with sizes smaller than those of the matrix grains is not a site for easy crack-propagation, but provides a site for a crack-deflection mechanism.

3846

Study of the Addition Effect of Fe₂O₃ and Al₂O₃ Originated from Pectin Citrus in the Glassy Phase on the Microestructural Development and in the Mechanical Characteristics of the Triaxial Ceramics

Authors: Aldo Przybysz, Adilson Luiz Chinelatto, Fauze Jacó Anaissi

Abstract: Triaxial ceramics are multiphased materials produced from natural raw material. That a small modification as much concerning in the composition from raw material a ceramic mass, may change several properties from ceramics. Thus, was included into the ceramic mass Al₂O₃ and Fe₂O₃, however both originated from pectin citrus plus salt the intended respective metal source. These oxides have a particular physical characteristic as high softness and high porosity. In addition to the ceramic mass containing 10% of clay, 25% kaolin, 35% feldspar and 30% of alumina (Ind. Alcoa) was inserted 6% of Fe₂O₃ and the full replacement of commercial alumina by Al₂O_3(pec). The result from these oxides are satisfactory mainly. Influencing in thermal contraction, in the reduction of the residual porosity and changing the final color inthe product.