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The glass stems produced by our company are mainly used in a variety of electric vacuum devices. Our company produces a variety of models and specifications of the core column, according to the style can be divided into flat core column, flat core column, etc., according to the material can be divided into Kovar core column, tungsten wire core column, molybdenum wire core column, etc.;

According to the manufacturing process, the glass core column belongs to the sealing of glass and metal. The difference in expansion coefficient between glass and metal can also be called pressure sealing. It is widely used in electronic, lighting and other electric vacuum devices. Different types of glass-metal seals have requirements for metal materials and glass. For matching sealing, the difference in expansion coefficient between the two should be less than 10%, while pressure sealing requires thin and thin elastic metal. The selection of sealing materials and the matching of corresponding process parameters play an important role in the quality of glass-metal sealing parts. The sealing process includes the control of temperature, sealing time, oxide film thickness, protective atmosphere, etc.
The sealing technology of our company meets (1) there should be no sand spots, streaks and larger bubbles at the sealing place; (2) high thermal stability, chemical stability, electrical insulation performance and processing performance; (3) It has better wetting performance and other requirements with metal oxides.

The company adheres to the principle of “customer first, quality first, integrity first”, and has established a strict quality standard inspection system. Welcome to customize processing with drawings and samples.
Kovar flat core column: It is carefully manufactured with DM-308 glass sealing.
Tungsten wire flat core column: It is carefully manufactured with 40-material glass sealing.
Molybdenum wire flat core column: DM-305 glass glass sealing is carefully crafted.