Microstructure and mechanical property of a new IPS-Empress 2 dental glass-ceramic / 中华口腔医学杂志
Chinese Journal of Stomatology
;
(12): 147-149, 2005.
Article
in Chinese
| WPRIM
| ID: wpr-324084
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the microstructure and mechanical properties of a new IPS-Empress 2 dental glass-ceramic.</p><p><b>METHODS</b>AFM, SEM and XRD were used to analyze the microstructure and crystal phase of IPS-Empress 2 glass-ceramic. The flexural strength and fracture toughness were tested using 3-point bending method and indentation method respectively.</p><p><b>RESULTS</b>IPS-Empress 2 glass-ceramic mainly consisted of lithium disilicate crystal, lithium phosphate and glass matrix, which formed a continuous interlocking structure. The crystal phases were not changed before and after hot-pressed treatment. AFM showed nucleating agent particles of different sizes distributed on the highly polished ceramic surface. The strength and fracture toughness were 300 MPa and 3.1 MPam(1/2).</p><p><b>CONCLUSION</b>The high strength and fracture toughness of IPS-Empress 2 glass ceramic are attributed to the fine lithium disilicate crystalline, interlocking microstructure and crack deflection.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Tensile Strength
/
X-Ray Diffraction
/
Materials Testing
/
Microscopy, Electron, Scanning
/
Chemistry
/
Compressive Strength
/
Dental Porcelain
/
Aluminum Silicates
Language:
Chinese
Journal:
Chinese Journal of Stomatology
Year:
2005
Type:
Article
Similar
MEDLINE
...
LILACS
LIS