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Colloidal silica is used as a binder with refractory grains such as alumina, aluminosilicates, fused silica and zircon. These systems are used for the casting of many types of metals.
Precision Investment Casting and Ceramics
Colloidal Silica is a preferred binder in precision investment casting of ceramic shells (i.e.,molds) thanks to its capacity for greater intricacy of casting designs and its high temperature tolerance. Therefore,colloidal silica is commonly used in the precision investment casting of high-quality metals and alloys.
Producers of components used in hi-tech industries know that customer tolerance for imperfection is non-existence. For this reason, precision investment casting processes need to produce nearly flawless products.
To help improve the precision investment casting processes, colloidal silica offers several investment advantages. Besides increasing the capacity for greater mold intricacy, colloidal silica can withstand temperatures of 1500°C with little shrinkage and good resistance to thermal shock.
All products created via precision investment casting can benefit from colloidal silica, including: turbine blades for aerospace engines; turbines and turbo fans; components for the automotive industry and household appliances; and medical instruments and implants.
Precision investment casting, also known as the lost wax casting process, is an ancient metal forming technology. The technique is several thousand years old, originally producing ornaments and jewelry. Today, many high tech components are fabricated to tight tolerances using this technology.
As a subsidiary of the OBT Group, OBT Refractory Manufacture CO., LTD has been manufacturing foundry and refractory materials for more than 16 years. Our stable quality and good after-sales service help us to obtain high feedback from European, South America, Japan, Thailand, Taiwan, Vietnam, Cambodia, Philippine, Malaysia, etc.