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- Title
Properties of experimental titanium cast investment mixing with water reducing agent solution.
- Authors
Zutai ZHANG; Ning DING; TAMAKI, Yukimichi; HOTTA, Yasuhiro; HAN-CHEOL, Cho; MIYAZAKI, Takashi
- Abstract
This study aimed to develop a dental investment for titanium casting. ZrO2 and A12O3 were selected as refractory materials to prepare three investments (Codes: A-C) according to the quantity of Zr. A12O3 cement was used as a binder at a ratio of 15%, they were mixed with special mixing liquid. Bl was used as a control mixed with water. Fundamental examinations were statistically evaluated. A casting test was performed with investment B. Fluidities, setting times, and green strengths showed no remarkable differences; however, they were significantly different from those of Bl. Expansion values for A, B, C, and Bl at 850°C were 1.03%±0.08%, 1.96%±0.17%, 4.35%±0.23%, and 1.50%±0.28% respectively. Castings were covered by only small amounts of mold materials. The hardness test showed no significant differences between castings from B and the ones from commercial investments. The experimental special mixing liquid effectively reduced the water/powder ratio and improved the strength and thermal expansion.
- Subjects
ZIRCONIUM oxide; TITANIUM castings; REFRACTORY materials; DENTAL casting; THERMAL expansion
- Publication
Dental Materials Journal, 2012, Vol 31, Issue 5, p724
- ISSN
0287-4547
- Publication type
Article
- DOI
10.4012/dmj.2012-030