item

Place of Origin

China

KND/CW-NP-P7X12

Net Weight

1000g

Composition (%)

Application

This product is suitable for the fabr日海ication of Type 0, 1, 2, 3 cus河購tom-made porcelain坐腦-fused-to-metal crown and bridge r飛懂estorations.

Shelf Life

Solidus Temperature (℃)

1350±50

1350±50

Thermal Expansion Coefficien金學t

Tensile Strength (MPa)

≥270

200±20

Density (g/cm³)

8.2±0.4

Vickers Hardness HV

The wax pattern for c美信rowns should be at近間 least 0.3mm thick, especially at 厭微the cervical margin. 要錢Single crowns sh道算ould have a sprue with 家雨a diameter of at least 房做1.5mm. For bridge書黑s, it should be 2.0mm or more, and 厭男the airway line should be at lea體風st 1.0mm in diameter. Before em爸妹bedding, coat the wax patte草國rn with a surfactant and wait for i來線t to dry completely. Use通個 phosphate-based, carbon-free high-紅國temperature investment mate對土rials. After it新房 begins to set, place it in an 通兵oven after an hour. Follow t議些he burning procedure as pe算男r the investment ma用東terial's instructions. Pla來訊ce in an electric oven. Slowly heat t綠船o 950°C, hold for 30 minutes嗎站, then cast. For casting: a. Use a ce兵媽ntrifugal casting ma通科chine. For melting with gas and oxygen,司司 gas pressure is 0.2匠用MPa, and oxygen pressure is 2MPa. For a坐畫cetylene and oxygen, acetyle場多ne pressure is 0.4MPa, and ox師鐵ygen pressure is 2MPa. b. When u校學sing high/mid-frequency casting machin師銀es, choose the proper power a藍跳nd heating time. Cast i呢近mmediately when the profile just 個司sinks and has a uniform b水都rightness. Avoid overheating.內愛 After casting, let筆拍 the mold cool naturally in the a腦藍ir. Do not immerse in wate是藍r to prevent inte白學rnal stresses. Grinding the metal 學關castings should be done 討答using aluminum oxide grindi生花ng wheels and t弟新ungsten carbide burs. Ensu物下re consistent grinding d醫看irection. Ceramic Firing: a. Degassing:做到 Place the ground cast媽西ings in the ceramic furnace, vac行得uum heat to 970°C-980°C, hol要問d for about 3 minutes, then cool我拿 to prevent bubbles during兵科 the ceramic firing process.著鐘 b. After pre-oxidation, use clean 150在有um-250um alumina (coru厭雨ndum powder) at 6kg/c聽問m air pressure to spray 這線off the oxide layer on the metal crown 影報surface. Ultrasonical那開ly clean or steam-clean afte姐音rward. c. After筆習 the aforementioned proced數劇ures, proceed with ceramic firin吧微g using ceramic powders like V動雜ita. Follow the manufacturer'紙窗s instructions. It's recommended t作商o bake the opaque 朋道ceramic in two sessions to avo也遠id bubbles. d. 湖音After firing, there may be 相內slight oxidation inside and around the 做森metal crown, which can be gently sand答有blasted away.

No specific storage conditions and 能了use-by date are requir吧公ed. Transport using 醫上standard methods著南 or as per contract. Protec務人t from rain, snow, m務商echanical impact, and never mix wit醫請h corrosive substances during 木學transportation.
Maintenance