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Effect of Al 2 O 3 Addition on the Flexural Strength and Light‐Transmission Properties of Bone China
Author(s) -
Zhang Yin,
Yang Yuquan,
Li Wenda,
Ren Yunpeng
Publication year - 2014
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12296
Subject(s) - materials science , flexural strength , thermal expansion , thermal shock , sintering , microstructure , composite material , scanning electron microscope , transmittance , corundum , optoelectronics
To improve the flexural strength and light‐transmission properties of bone china, the effects of adding different amounts of alumina (0–3%) to bone china bodies were studied and the phase composition and microstructure of different samples were studied by X‐ray diffraction ( XRD ) and scanning electron microscopy ( SEM ). In addition, physical properties, such as the bulk density, the thermal expansion coefficient ( TEC ) and thermal shock resistance, were studied. It was found that adding alumina increased the overall sintering temperature while reducing the sintering temperature range of bone china. Furthermore, addition of 1% Al 2 O 3 improved the tree‐point flexural strength from 120 MP a to 150 MP a, the light transmittance (at 2 mm thickness) from 6.7% to 7.5%, the thermal expansion coefficient from 8.4 × 10 −6 °C −1 to 8.1 × 10 −6 °C −1 and the thermal shock resistance from 140°C to 180°C. Higher corundum content results in similar high flexural strength but lower light transmittance.