Talc-Rich Black Tibetan Pottery of Derge County, Sichuan Province, China

Chandra L. Reedy; Pamela B. Vandiver; Ting He; Ying Xu

doi:10.1557/adv.2017.287

Talc-Rich Black Tibetan Pottery of Derge County, Sichuan Province, China

MRS Advances ◽

10.1557/adv.2017.287 ◽

2017 ◽

Vol 2 (35-36) ◽

pp. 1943-1968

Author(s):

Chandra L. Reedy ◽

Pamela B. Vandiver ◽

Ting He ◽

Ying Xu

Keyword(s):

Thermal Expansion ◽

Thermal Conduction ◽

Raw Materials ◽

Well Being ◽

Sichuan Province ◽

Firing Process ◽

High Mountain ◽

Low Thermal Expansion ◽

And Performance ◽

Conduction Properties

ABSTRACTUnusual raw materials are used to produce Tibetan black pottery in Puma township of Derge County, Sichuan Province, China. Carbonaceous, calcareous pyrite-rich illitic lakebed clay is mixed in equal proportions with a ferruginous talc-chlorite steatite. A two-stage firing process results in a dark, lustrous surface. The large amount of talc imparts many useful functional qualities to this pottery; most significant are the low thermal expansion and good thermal conduction properties of talc that make these ceramics highly suitable for heating and cooking in this high mountain region. Although used in some modern ceramics, and even in modern stoves, talc is an unusual ingredient in non-industrialized ceramics. Procurement and preparation of this resource adds to the production time but its properties and performance make talc an excellent choice for the well-being and comfort of local Tibetan households.

Download Full-text

Crystallization Behavior and Performance of MgO-Al2O3-SiO2 Glass-Ceramics by Sintering

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.92.65 ◽

2010 ◽

Vol 92 ◽

pp. 65-71 ◽

Cited By ~ 4

Author(s):

Pei Xin Zhang ◽

Li Gao ◽

Qiu Hua Yuan ◽

Hai Lin Peng ◽

Xiang Zhong Ren ◽

...

Keyword(s):

Thermal Expansion ◽

Flexural Strength ◽

Thermal Expansion Coefficient ◽

Expansion Coefficient ◽

Crystallization Process ◽

Glass Ceramics ◽

X Ray Diffraction ◽

Low Thermal Expansion ◽

Main Crystalline Phase ◽

And Performance

The glass-ceramics of MgO-Al2O3-SiO2 system were prepared by sintering technology. The crystallization process of MgO-Al2O3-SiO2 glass-ceramics was investigated with X-ray diffraction (XRD), scanning electron microscopy (SEM), and other techniques; the discussion of breaking strength, thermal expansion coefficient and relevant properties at different sintering temperatures was also presented. The results show that: (1) The main crystalline phase isα-cordierite at different sintering temperatures, and the samples show high flexural strength and low thermal expansion coefficient; (2) with the increase of sintering temperature, the content of crystal phase increases, while the thermal expansion coefficient decreases evidently, the flexural strength and tightness density rise up first, then go down.

Download Full-text

Effect of WO3 on the Performances of Cordierite Ceramics Synthesized by Using Kyanite as Raw Materials

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.281.99 ◽

2018 ◽

Vol 281 ◽

pp. 99-104

Author(s):

Meng Li Qin ◽

Xi Tang Wang ◽

Zhou Fu Wang ◽

Yan Ma ◽

Hao Liu

Keyword(s):

Thermal Expansion ◽

Phase Composition ◽

Thermal Expansion Coefficient ◽

Expansion Coefficient ◽

Intermediate Phase ◽

Raw Materials ◽

Low Thermal Expansion ◽

Cordierite Ceramics ◽

The Right

In order to synthesize cordierite ceramics with low thermal expansion coefficient and good properties, in our work, the cordierite ceramics were prepared by using talc, natural containing zirconium kyanite, common kyanite and industrial Al2O3 as raw materials, introducing the right amount of WO3 (introducing tungsten acid) as catalyst. The effects of the introduced WO3 on the phase composition, sintering characters, microstructure and thermal expansion coefficient of the cordierite ceramics were investigated. The results show that the introduction of WO3 can eliminate the intermediate phase magnesia-alumina spinel and promote the formation of cordierite; the as-prepared cordierite ceramics synthesized by using natural containing zirconium kyanite as raw materials have high densification degree and low thermal expansion coefficient (1.53×10-6/°C, Rt~1000 °C).

Download Full-text

Comparison of Porous Ceramic Materials with Low Thermal Expansion Coefficient Prepared with SiC and Black-Al2O3

Materials Science Forum ◽

10.4028/www.scientific.net/msf.569.321 ◽

2008 ◽

Vol 569 ◽

pp. 321-324

Author(s):

Isaías Juárez-Ramírez ◽

Koji Matsumaru ◽

Kozo Ishizaki ◽

Leticia M. Torres-Martínez

Keyword(s):

Thermal Expansion ◽

Room Temperature ◽

Raw Materials ◽

Porous Ceramic ◽

Ceramic Materials ◽

X Ray Diffraction ◽

Low Thermal Expansion ◽

New Phase ◽

Porous Ceramic Materials ◽

Made In

Porous ceramic materials with low thermal expansion (LTE) at room temperature were prepared by heating a mixture of SiC or black-Al2O3, vitrified bonding material (VBM) and LiAlSiO4 at temperatures from 850°C to 1100°C. The mixture was prepared in adequate proportions to obtain a material with LTE according to previous works made in our laboratory. It was observed that a change in temperature provoked the formation of a new phase, LiAlSi3O8, which appears above 900°C. The presence of this new phase did not affect the thermal expansion value, keeping LTE at room temperature. All compounds showed around 40% of porosity, and Young’s modulus values of 30 GPa using black-Al2O3 or SiC. X-ray diffraction analysis (XRD) revealed that above 900°C the phase LiAlSi3O8 starts to appear as a consequence of the melting of VBM, which is reacting with the raw materials. SEM micrographs showed the presence of SiC or black-Al2O3 grains joined by VBM, which is acting as a bridge between them.

Download Full-text

The Synthesis and the Thermal Properties of CaZr4(PO4)6 Materials

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.341-342.69 ◽

2013 ◽

Vol 341-342 ◽

pp. 69-73

Author(s):

Long Su ◽

Wan Mei Sui ◽

Yu Jie Liu

Keyword(s):

Thermal Expansion ◽

Relative Density ◽

Phase Structure ◽

Solid Phase ◽

Raw Materials ◽

Solid Phase Reaction ◽

Phase Reaction ◽

Thermal Expansion Property ◽

Thermal Expansion Coefficients ◽

Low Thermal Expansion

CaZr4(PO4)6 ceramics were prepared with solid reaction of two-steps method. CaZr4(PO4)6 powders were synthesized by solid-phase reaction with Ca (OH)2, ZrO2 and (NH4)2HPO4 as raw materials. Then the powders precursor were sintered to CaZr4(PO4)6 ceramics with single phase structure at 1400°C for 8 hours. The relative density was measured, the phase structure of the materials synthesized at different temperatures and the average coefficients of thermal expansion were investigated. The results showed that the relative density of CaZr4(PO4)6 ceramics sintered at 1400°C was 93%. The average thermal expansion coefficients was 1.8×10-6/°C from 25°C to 1400°C. The CaZr4(PO4)6 ceramics obtained possesses low thermal expansion property in a broad range of temperatures.

Download Full-text

Use of Fly Ash as Bonding Material on Low Thermal Expansion Porous Materials

Materials Science Forum ◽

10.4028/www.scientific.net/msf.658.276 ◽

2010 ◽

Vol 658 ◽

pp. 276-279

Author(s):

Isaías Juárez-Ramírez ◽

Antonio Zaldivar-Cadena ◽

Leticia M. Torres-Martínez ◽

Santiago I. Suárez-Vázquez ◽

Astrid Sánchez-Vázquez ◽

...

Keyword(s):

Thermal Expansion ◽

Fly Ash ◽

Porous Materials ◽

Ball Milling ◽

Mechanical Milling ◽

Sintering Temperature ◽

Raw Materials ◽

Bonding Material ◽

Low Thermal Expansion ◽

Planetary Ball Milling

In this work it was determined the effect of fly ash (FA) as bonding material during the fabrication of low thermal expansion porous materials. SiC, fly ash, Vitrified Bonding Material (VBM), and LiAlSiO4 powders were used as raw materials. Porous materials were sintered at 850°C and 950°C after manual milling and mechanical milling in a planetary ball milling at 800 RPM. SEM micrographs showed the presence of porous materials, and it was observed that fly ash particles did not melt at 850°C. However if sintering temperature increases at 950°C, FA starts to melt and it is forming bridges between SiC particles. Thermal expansion values were around 3.0x10-6 K-1. According to these results, it seems that it is possible to have a favorable synergy between FA and VBM to fabricate SiC porous materials with low thermal expansion values.

Download Full-text

Use of Kaolin Processing Waste for the Production of Mullite Bodies

Materials Science Forum ◽

10.4028/www.scientific.net/msf.591-593.799 ◽

2008 ◽

Vol 591-593 ◽

pp. 799-804 ◽

Cited By ~ 4

Author(s):

Maria Isabel Brasileiro ◽

Romualdo Rodrigues Menezes ◽

M.O. Farias ◽

Hélio Lucena Lira ◽

Gelmires Araújo Neves ◽

...

Keyword(s):

Thermal Expansion ◽

Flexural Strength ◽

Raw Materials ◽

Processing Waste ◽

X Ray Diffraction ◽

Mullite Ceramic ◽

Processing Industry ◽

X Ray ◽

Three Point Bending ◽

Low Thermal Expansion

Mullite is a versatile material used in traditional and advanced ceramic, due to low thermal expansion, high thermal shock and creep resistance. The production of waste from ore industry is a problem that is increasing nowadays. The kaolin processing industry produces residue rich in Al2O3 and SiO2. These oxides are good precursors to produce mullite. The aim of this work is to use the residue from kaolin industry to produce mullite ceramic bodies. It was studied alumina, clay and residue from kaolin processing as raw materials. The material was dried and pressing in uniaxial press (30MPa). The samples were sintered at temperatures of 1450oC, 1500oC, 1550oC and 1600oC. The ceramic bodies were characterized by X-ray diffraction. The density was measured by Archimedes method and the flexural strength by the three point bending technique. The results showed that is possible to produce mullite with high amount of waste from kaolin processing.

Download Full-text

Preparation and Characterization of Nb2O5-Al2O3 System Ceramics with Different Al2O3 Additions

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.544.60 ◽

2013 ◽

Vol 544 ◽

pp. 60-63 ◽

Cited By ~ 1

Author(s):

Xiao Zhen Zhang ◽

Jian Er Zhou ◽

Yu Hua Jiang ◽

Chun Rong Wu ◽

Chuan Ying Lin

Keyword(s):

Thermal Expansion ◽

Phase Composition ◽

Binary System ◽

Monoclinic Phase ◽

Bending Strength ◽

Raw Materials ◽

Reaction Sintering ◽

Strength Measurement ◽

Low Thermal Expansion

The Nb2O5-Al2O3 binary system ceramics were prepared by high temperature solid state reaction sintering, using Nb2O5 and Al2O3 micro powder as the raw materials. The samples were characterized by XRD, SEM, thermodilatometric analysis and mechanical strength measurement. The influences of Al2O3 content on the phase composition, microstructure, thermal expansion properties and bending strength were investigated. Results show the samples shows obvious changes in phase composition and microstructure with the addition of Al2O3 from 2.5% to 15%. The pure Nb2O5 ceramic is composed of monoclinic phase Nb2O5, while different monoclinic aluminum niobates were formed with different Al2O3 additions. Obvious microcracking can be observed for the samples without and with 2.5% and 7.5% Al2O3 additions. The addition of Al2O3 leads to significant increase of bending strength, and all the samples keep relatively low thermal expansion coefficient (TEC). The Nb2O5-Al2O3 binary system ceramics with ultra low TEC (0.55~0.86×10-6°C-1) and improved bending strength (50.4~70.6MPa) could be obtained with the addition of 7.5~15% Al2O3 when sintered at 1390°C for 2h.

Download Full-text

Preparation and Performance of AlN-ZrO2 Multiphase Material

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.368-372.778 ◽

2008 ◽

Vol 368-372 ◽

pp. 778-780

Author(s):

Rong Lin Wang ◽

Zhi Fa Wang ◽

Jing Long Bu ◽

Li Fang Zhang

Keyword(s):

Thermal Expansion ◽

Thermal Expansion Coefficient ◽

Expansion Coefficient ◽

Bending Strength ◽

Raw Materials ◽

Diffusion Reaction ◽

Al Content ◽

N2 Atmosphere ◽

And Performance ◽

And Diffusion

AlN-ZrO2 composites were prepared by solid state reaction in N2 atmosphere at 1500°C for 4h with PSZ and Al powders as raw materials. Effects of Al content on performance of the composites and the process of nitriding reaction were investigated. The results showed that surface layer reaction of samples happened between 450°C and 765°C, and diffusion reaction happened between 765°C and 1500°C. With increasing of Al content, thermal expansion coefficient decreased, bending strength increased, thermal shock resistance and oxidization resistance were improved. Finally, bending strength of 73.61 MPa and thermal expansion coefficient of 6.06×10-6 /°C were realized for AlN-ZrO2 composites.

Download Full-text