FIELD: foundry.
SUBSTANCE: invention relates to foundry and can be used in dentistry. The method for producing a casting filling moulding rapid-heating mixture in form of an article includes obtaining a powdered composition, the average particle diameter whereof is 30 mcm or less, adding a mixing liquid thereto, and tempering for further hardening in form of an article in a high-temperature furnace. As the main components, the powdered composition comprises calcined gypsum, quartz and cristobalite, as well as a powdered or low-water liquid moisture-retaining component. In the process of preparing the powdered composition, co-grinding of a material is executed, consisting of at least one of: calcined gypsum and quartz, calcined gypsum and cristobalite, calcined gypsum, quartz and cristobalite, and a powdered or low-water liquid moisture-retaining component is added during mixing of the main components.
EFFECT: reduced sustaining time for hardening the mixture in form of an article and reduced cracking due to a thermal shock are ensured.
17 cl, 1 dwg, 3 tbl, 3 ex
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Year |
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2014 |
|
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