The Invisible Hero in Hermetic Sealing:

Glass Preforms
Featured Product

Sealing Glass Powder

Expertly crafted for optimal flow and efficiency, our sealing glass powder, provided in form of granulates, offer unmatched bonding strength, customizable colors, and seamless integration into various industries. Ideal for high-precision manufacturing, they're the go-to solution for reliable, durable seals.
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Key Consideration: Sealing Glass Characteristics

Glass Specifications & Applications
No. Code Glass Composition Density
g/cm3		 Sintering Temperature
Tm/℃		 TEC/10-6(30-300℃) Color
LTCC LP080 P2O5-SnO-ZnO 3.85 vacuum 560 13.4±0.5 Black
LC-1 Bi2O3-B2O3-ZnO 6.60 vacuum 600 11.7±0.5 Black

The Application Areas of Products

 
  • Glass-to-metal-sealed Connectors
    Vacuum Bottle
  • Glass-to-metal-sealed TO Packages
    Glass Paste
  • Smart Watch Casebacks
    Ceramic Substrate Glaze
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How Can Sealing Glass Preforms
Make the Difference?

 
 

Precision-Engineered Shapes

Our glass solder preforms are meticulously crafted into a variety of shapes - rods, tubes, discs, and more - tailored to meet the exact specifications of your sealing needs.

Customized Glass Composition

Each preform is composed of specially formulated glass, designed to match the thermal expansion properties of different metals, ensuring a perfect seal every time.

Uniform Quality and Consistency

State-of-the-art manufacturing processes guarantee uniformity in size, shape, and composition, delivering unparalleled consistency across batches.
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Glass Preform Manufacturing:
Process and Key Considerations
  • Raw Material Selection
  • Batch Preparation
  • Forming the Preforms
  • Precision Shaping
  • Quality Control
  • Packaging and Shipping

Raw Material Selection

Quality Glass Powder

The process begins with the selection of high-quality oxides. The composition of the glass is chosen based on the intended application and desired properties, such as melting point, thermal expansion, and chemical resistance.

Additives

Sometimes, additional materials are added to modify the properties of the glass, like improving flow characteristics or changing the thermal expansion coefficient.

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Batch Preparationn

Mixing

The glass powder and any additives are thoroughly mixed to ensure uniformity.

Melting

The mixture is then melted in a furnace at high temperatures, typically several hundred degrees Celsius, depending on the type of glass.

Ball Milling

The melt is cooled and then ball milled to achieve a fine, homogenous powder with a consistent particle size.

Sieving

This powder is sieved to remove any oversized particles, ensuring a uniform particle size distribution.

Granulation

The sieved powder is granulated, turning it into larger, more manageable granules to improve the flow characteristics, making it easier to handle.

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Forming the Preforms

Molding

The molten glass is formed into preforms using various methods.

Pressing

For simpler shapes, a press is used to mold the molten glass.

Drawing

For rod-like or tubular shapes, the molten glass may be drawn out to the required diameter and length.

Extrusion

Extrusion can be used for more complex shapes, where the glass is forced through a die.

Cooling

After forming, the preforms are cooled at a controlled rate to prevent internal stresses.

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Precision Shaping

Grinding and Polishing

The preforms are ground and polished to achieve precise dimensions and surface finish.

CNC Machining

For more complex shapes, CNC machining might be employed for high precision.

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Quality Control

Inspection

Each preform undergoes rigorous inspection for dimensions, surface quality, and material properties.

Testing

Tests may include thermal and chemical resistance tests, as well as checks for any internal stresses.

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Packaging and Shipping

Safe Packaging

Preforms are carefully packaged to prevent damage during transportation.

Customization:

Packaging can be customized based on client specifications, especially for sensitive or high-precision components.

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Choose Sinopride:
A Premium Glass Preform Manufacturer from China
We are a premier hermetic sealing glass manufacturer in China specializing in the research and production of high-quality sealing glass powder and related products and solutions. Our goal is to protect critical components from moisture, dust, thermal variations, and shocks for optimal performance and longevity in demanding applications. Choose us for our shared commitment to delivering products that embody precision, durability, and unparalleled quality.
30+
Years of Experience
20+
Members of QC Team
11+
Members of R&D Team
600+
Annual Production in Tonnes
39+
Patents Granted
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