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Howard, P. J.; Hughes, Amy

doi:10.1023/a:1004880930614

Cited by 3 publications

(3 citation statements)

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“…It can be seen that the prepared glass-ceramic sample (d code) has a lower dielectric constant at all measured frequencies compared to the bulk sample. Typical dielectric constants of the cordierite-bearing glass-ceramics have been reported less than 5 [4]. The dielectric constant of cordierite glass-ceramic at 1MHz was reported to be 5.7 which increased by the formation of the secondary phase (9.9) [22].…”

Section: Measurements Of Physical and Mechanical Propertiesmentioning

confidence: 99%

“…Therefore, cordierite has the potential to be used in protective radio equipment and microwave packaging [4][5][6]. To satisfy these specifications, cordierite glass-ceramics should be fully sintered with very low water adsorption.…”

Section: Introductionmentioning

confidence: 99%

“…They focused mainly on the rheological properties, suspension preparation, and the effect of pH; however, they did not attain full densification (about 95% of the theoretical density) or high strength (72 MPa). It has been also shown that cordierite glass-ceramics can be fabricated through slip casting; however, there were many pores and flaws in the prepared microstructure [4]. The main purpose of this study is to investigate the feasibility of preparing dense cordierite-based glass-ceramics by slip casting without the use of sintering aids.…”

Section: Introductionmentioning

confidence: 99%

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Development of cordierite-based glass-ceramics by slip casting through selecting the appropriate sintering conditions

et al. 2022

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The present work aims to prepare a dense cordierite-based glass-ceramic through slip casting and consequent heat treatment procedures. In this regard, sintering conditions were considered as the key variables to improve the properties of the glass-ceramic. For this purpose, glass frit powder was prepared through melting oxide powders (in the system of SiO2-Al2O3-TiO2-K2O-CaO-MgO). The mixed powders were then heat treated at 1450 °C for 1 hour and quenched in water. The glass frit powder was slip cast using the appropriate dispersant. Sintering was carried out by one-step, two-step, and three-step procedures. Specimens were characterized in terms of various analysis techniques including dilatometry, X-ray diffractometry, scanning electron microscopy, and mechanical strength measurement. Among the examined specimens, the sample sintered by a three-step approach was considered the optimized one which attained zero porosity. According to the obtained results, cordierite crystals were observable in this glass-ceramic matrix. A low coefficient of thermal expansion and a low dielectric constant were observed for the optimized glass-ceramic sample. The obtained results confirmed that the homogenous distributions of crystalline phases are responsible for the appropriate and desirable properties of the prepared glass-ceramic.

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Section: Measurements Of Physical and Mechanical Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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