Gypsum-bonded Investment and Dental Precision Casting (IV) Transformation of III-CaS04 to II-CaS04
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چکیده
منابع مشابه
Gypsum-bonded investment and dental precision casting (IV) transformation of III-CaSO4 to II-CaSO4.
The degree of III-CaSO4 to II-CaSO4 transition was estimated on wet specimens, 25 mm in diameter and 50 mm high, prepared from a gypsum-bonded investment for quick casting. After 30 min from mixing the specimens were heated in a 700 degrees C furnace until a specimen temperature of 200 degrees C to 700 degrees C was reached. The estimation was made by measuring mass changes of the specimens bef...
متن کاملGypsum - bonded Investment and Dental Precision Casting ( IV ) Transformation of III - CaS 04 to II - CaS 04
Farzaneh AGHAJANIi'2, Zulia HASRATININGSIHi'3 and Toshiko MORIi'4 iBiomaterials Science Unit, Faculty of Dentistry, The University of Sydney, 2 Chalmers Street, Surry Hills, NSW 2010, Australia2Department of Dental Materials, Faculty ef Dentistry, Tehran University of Medical Science, Tehran, Iran aDepartment of Dental Materials, Faculty ef Dentistry, Padjadjaran University, Jalan Sekeloa Selat...
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The aim of the present study was to evaluate the dimensional accuracy and surface property of titanium casting obtained using a gypsum-bonded alumina investment. The experimental gypsum-bonded alumina investment with 20 mass% gypsum content mixed with 2 mass% potassium sulfate was used for five cp titanium castings and three Cu-Zn alloy castings. The accuracy, surface roughness (Ra), and reacti...
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Discovery of abundant anhydrite (CaS04) and gypsum (CaS0+2HzO) in the otherwise carbonate sediments comprising the upper portion of the rocks contained within the Chicxulub impact crater has prompted research on the shock-induced vaporization of these minerals. We use a vaporization criterion determined by shock-induced entropy. We reanalyze the shock wave experiments of Yang [ 11. He shocked 3...
متن کاملPlaster of Paris
Paris (CaS04)2H20. Excessive heat convey it into anhydrous calcium sulphate CaB^< which takes up water very slowly and does D?. harden and set. 2CaS04.2H20 = (CaSW 2H20+3H20. (CaS04)2H20 = 2CaS 04H2U, Commercial plaster of Paris is manufacture from impure gypsum and therefore contains tn impurities present in the gypsum such as alum10^ iron, silicates, carbonates, lime, etc., which be recognize...
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ژورنال
عنوان ژورنال: Dental Materials Journal
سال: 2004
ISSN: 1881-1361,0287-4547
DOI: 10.4012/dmj.23.373