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.
| Original language | English |
|---|---|
| Pages (from-to) | 1283-1296 |
| Number of pages | 14 |
| Journal | Chiang Mai Journal of Science |
| Volume | 47 |
| Issue number | 6 |
| Publication status | Published - 2020 |
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This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 7 Affordable and Clean Energy -
SDG 9 Industry, Innovation, and Infrastructure -
SDG 12 Responsible Consumption and Production
Keywords
- Crystal morphology
- Glass-ceramics
- Mold materials
- Yttria-stabilized zirconia
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