[Determination of normal temperature properties of refractory die material compatible with slip casting core of sintered titanium powder].
OBJECTIVE
The refractory die is the precondition for developing slip casting core of sintered powder. This study is to determine the normal temperature properties of the refractory die material compatible with slip casting core.


METHODS
to mix the die material at five different ratios (8/1, 7.5/1, 7/1, 6.5/1, and 6/1) and measure their solidification time with self-manufactured Vicker's needle; to prepare five cylindrical specimens (phi 10 x 15 mm) in different drying time for determining their compressive strength, and then to let another five specimens fire at 1000 degrees C four times for measuring the residual compressive strength at room temperature.


RESULTS
The setting time was 16.25 minutes (7.5/1), and the lower the powder-liquid ratio, the longer the setting time. The normal compressive strength was 25.32 MPa (drying 24 hours), while the longer the drying time, the higher the compressive strength achieved (P < 0.01). The residual compressive strength was 24 MPa.


CONCLUSIONS
The normal temperature properties of the refractory die material meet the demand of slip casting core of sintered powder.
Kuang
X
X
College of Stomatology, West China University of Medical Sciences.
Liao
Y
Y
Chao
Y
Y
Wang
H
H
D019245:Compressive Strength; D003442:Crowns; D003734:Dental Casting Investment; D003735:Dental Casting Technique; D008422:Materials Testing; D016876:Metal Ceramic Alloys; D011208:Powders; D013696:Temperature; D014025:Titanium
D003734:Dental Casting Investment; D016876:Metal Ceramic Alloys; D011208:Powders; D014025:Titanium