TY - JOUR
T1 - Crystalline Phase Analysis and Thermal Expansion Coefficient Calculation of Quartz-Sand/Corundum Composites
AU - Hidayat, Nurul
AU - Taufiq, Ahmad
AU - Sunaryono,
AU - Pratapa, Suminar
N1 - Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2018/10/10
Y1 - 2018/10/10
N2 - Quartz-sand/corundum composites have been successfully produced by a simple solid-state reaction approach. The composites with corundum weight fractions of 10%, 20%, and 30% were prepared through grinding mixtures of purified Indonesian quartz sand and commercial high purity corundum for a half-hour with an addition of 3% polyvinyl alcohol. The composites were shaped into discs and pressed prior to the sintering at 950 °C and 1050 °C to form compact ceramic composites. The crystalline phase verification within the samples was conducted by means of X-ray diffraction (XRD). The coefficient of thermal expansion (CTE) of the composites was semi-theoretically evaluated, after being taken into consideration the XRD data analysis results, by means of Halpin-Tsai formula. The detected major crystalline phases within the sintered samples, based on the XRD profiles analysis, were quartz-SiO2 and corundum-Al2O3. Meanwhile, the minor crystalline phases were wollastonite-CaSiO3 (below 7%) for all samples and cristobalite-SiO2 (around 1%) for the composite with 1050 °C sintering temperature. Generally, the addition of corundum into the quartz-sand/corundum composites reduced the CTE, having the value from 10.5 to 11.5 ppm/°C.
AB - Quartz-sand/corundum composites have been successfully produced by a simple solid-state reaction approach. The composites with corundum weight fractions of 10%, 20%, and 30% were prepared through grinding mixtures of purified Indonesian quartz sand and commercial high purity corundum for a half-hour with an addition of 3% polyvinyl alcohol. The composites were shaped into discs and pressed prior to the sintering at 950 °C and 1050 °C to form compact ceramic composites. The crystalline phase verification within the samples was conducted by means of X-ray diffraction (XRD). The coefficient of thermal expansion (CTE) of the composites was semi-theoretically evaluated, after being taken into consideration the XRD data analysis results, by means of Halpin-Tsai formula. The detected major crystalline phases within the sintered samples, based on the XRD profiles analysis, were quartz-SiO2 and corundum-Al2O3. Meanwhile, the minor crystalline phases were wollastonite-CaSiO3 (below 7%) for all samples and cristobalite-SiO2 (around 1%) for the composite with 1050 °C sintering temperature. Generally, the addition of corundum into the quartz-sand/corundum composites reduced the CTE, having the value from 10.5 to 11.5 ppm/°C.
KW - Crystalline phase
KW - coefficient of thermal expansion
KW - corundum
KW - quartz-sand
UR - http://www.scopus.com/inward/record.url?scp=85056419848&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/1093/1/012041
DO - 10.1088/1742-6596/1093/1/012041
M3 - Conference article
AN - SCOPUS:85056419848
SN - 1742-6588
VL - 1093
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012041
T2 - 2017 International Conference on Mathematics, Science, and Education, ICoMSE 2017
Y2 - 29 August 2017 through 30 August 2017
ER -