Chiang Mai Journal of Science

Relating Type of Mold Materials to Crystal Morphology and Properties of Glass-ceramics with YSZ Additions as a Dental Material

Paper Type	Contributed Paper
Title	Relating Type of Mold Materials to Crystal Morphology and Properties of Glass-ceramics with YSZ Additions as a Dental Material
Author	Sukanda Angkulpipat, Thapanee Srichumpong, Sahadsaya Prasertwong, Ekarat Meechoowas, Krongkarn Sirinukunwattana, Greg Heness, Roberto Rosa, Kallaya Suputtamongkol and Duangrudee Chaysuwan*
Email	fengddc@ku.ac.th
Abstract:  YSZ was added to glass frit in order to improve properties of the glass-ceramic dental materials by casting into a graphite mold and a cast iron mold and then crystallized via heat treatment. XRD results presented the similar crystalline phases of phlogopite-calcium mica and tetragonal zirconia in both molds. Microstructures by SEM showed the different crystal morphology due to casting molds. The slow cooling of graphite mold produced the equiaxed crystals whereas the fast cooling of cast iron mold promoted rod-like, and YSZ addition increased the number of crystals. The properties depended on the crystal morphology and crystallinity. The 5 wt% YSZ added glass-ceramic from graphite mold developed the equiaxed crystals to present the desirable properties of 147.15 MPa, flexural strength, 251.80 μg/cm2, chemical solubility and 9.26 × 10-6/°C CTE. The results were accepted by ISO 6872:2015 (Dentistry-Ceramic Materials) in type II class 2b as a partially and fully covered single substructure and matched with commercial porcelains.
Start & End Page	1283 - 1296
Received Date	2020-03-25
Revised Date
Accepted Date	2020-06-29
Full Text	Download
Keyword	glass-ceramics, yttria-stabilized zirconia, mold materials, crystal morphology
Volume	Vol.47 No.6 (November 2020)
DOI
Citation	Angkulpipat S., Srichumpong T., Prasertwong S., Meechoowas E., Sirinukunwattana K., Heness G., et al., Relating Type of Mold Materials to Crystal Morphology and Properties of Glass-ceramics with YSZ Additions as a Dental Material, Chiang Mai J. Sci., 2020; 47(6): 1283-1296.
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