Glass Powder: Unlocking High-Performance High-Temperature Glass Sealing Solutions

  Explore Sinopride's Glass Powder, specially designed for high-temperature glass sealing in harsh environments. Our Sealing Glass Powder and glass-to-metal sealing solutions ensure excellent reliability and lasting performance to meet your strictest procurement needs. Discover now how Industrial Glass Powder empowers your critical applications. 

Introduction: High-Temperature Sealing, the "Invisible Guardian" of Industrial Core

  In the complex world of modern industry, many key components must operate under extreme conditions, such as high temperatures, high pressures, corrosive environments, or vacuums. In these challenging scenarios, reliable sealing solutions are crucial. They serve as the "invisible guardians" ensuring long-term stable operation of equipment, preventing leaks, and protecting internal precision components. As a leader in specialty inorganic materials, Sinopride(www.spcera.net) focuses on providing high-performance high-temperature glass sealing solutions, particularly Kovar Sealing Glass and Iron Sealing Glass, empowering industrial customers worldwide.

  Glass-ceramic seals are widely used in high-temperature heating elements, semiconductor components, optical communications, sensors, integrated circuits, household appliances, and construction. Their core value lies in achieving hermetic sealing, high insulation, and exceptional reliability . For high-end applications like automobiles, high-temperature sealing technology enables reliable hermetic connections between metals and other materials.

  With over 30 years of professional accumulation in materials science, Sinopride offers a comprehensive range of Kovar Sealing Glass and Iron Sealing Glass products (models ST015, ST408, SH604, SN001, SK016), delivering high performance in extreme environments. Their products are certified by ISO 9001 and IATF 16949, and validated by global leading enterprises, making them a trusted choice for high-risk industrial applications .

What Is High-Temperature Glass Sealing Powder?

H2: Technical Definition and Core Features

  High-temperature Glass Sealing Powder refers to specially formulated glass materials that sinter at 920–980°C, forming strong bonds with metals like iron and Kovar (4J29). Compared with low-temperature alternatives, these powders offer the following advantages:

• Thermal Expansion Matching: Precisely adjusted coefficients ensure synchronous expansion with metals, minimizing stress cracks;

• Extreme Condition Resistance: Maintains hermeticity at temperatures up to 500°C and resists chemical corrosion;

• Electrical Insulation Performance: Provides high resistance ( > 500 MΩ at DC 500V) in electronic applications.

Sinopride's Core Products: Iron Sealing Glass and Kovar Sealing Glass

  Leveraging deep industry experience and independent R&D capabilities, Sinopride provides customers with two categories of high-performance glass powder products: Iron Sealing Glass and Kovar Sealing Glass. These products are meticulously designed and rigorously tested to ensure optimal performance in their respective application scenarios.

Iron Sealing Glass: The Resilient Choice for Harsh Environments

  Sinopride's Iron Sealing Glass is specially designed for applications requiring sealing with ferrous metals (such as carbon steel, stainless steel, etc.). This Sealing Glass Powder product is renowned for its excellent resistance to high voltage, high resistance, high temperatures, and corrosive environments . For example, in refrigeration compressor terminal sealing, Iron Sealing Glass can withstand harsh operating conditions, ensuring long-term airtightness and electrical insulation. It is also an ideal choice for key components like battery caps and TO headers, guaranteeing stable operation and extended lifespan of products under harsh working conditions .

 

Model	Glass System	Density (g/cm³)	Use Temp (°C)	TEC (10⁻⁶/K, 30-300°C)	Color	Application Area
ST015	Si2O-B2O3-R2O	2.57	950-980	9.9±0.5	Dark blue	Iron Sealing Glass
ST408	Si2O-B2O3-R2O	2.7	925-955	10.2±0.5	Dark blue	Iron Sealing Glass
SH604	Si2O-B2O3-R2O	2.54	950-980	9.6±0.5	White	Iron Sealing Glass
SN001	Si2O-B2O3-R2O	2.45	960-980	10.3±0.5	Dark blue	Iron Sealing Glass

Why Choose Iron Sealing Glass?

• High Voltage Resistance: ST015 and ST408 excel in applications requiring > 500V insulation, making them perfect for power electronics;

• Corrosion Protection: SH604 resists lithium battery electrolytes, ensuring a service life of over 10 years in smart meters;

• Thermal Shock Stability: Withstands rapid temperature changes in automotive sensors.

Kovar Sealing Glass: Precision Matching to Eliminate Stress

Kovar Sealing Glass is another star product of Sinopride, specially developed to achieve perfect thermal expansion coefficient matching with Kovar (4J29) metal. This precise matching is the key to stress-free sealing, ensuring that glass and metal expand and contract synchronously under extreme temperature changes, thus minimizing stress generated during the sealing process. The result is highly reliable, hermetically sealed components with excellent mechanical and electrical properties . It is widely used in relays, TO headers, crystal oscillator bases, and various connectors, where sealing precision and reliability are of utmost importance. This precise matching effectively avoids cracking or breaking due to uneven thermal stress, significantly enhancing product reliability in complex environments . 

Model	Glass System	Density (g/cm³)	Use Temp (°C)	TEC (10⁻⁶/K, 30-300°C)	Color	Application Area
SK016	Si2O-B2O3-R2O	2.28	960-980	5±0.5	White	Kovar Glass

Why Choose Iron Sealing Glass?

• High Voltage Resistance: ST015 and ST408 excel in applications requiring > 500V insulation, making them perfect for power electronics;

• Corrosion Protection: SH604 resists lithium battery electrolytes, ensuring a service life of over 10 years in smart meters;

• Thermal Shock Stability: Withstands rapid temperature changes in automotive sensors.

Scenario-Based Applications: The Wide-Ranging Use of Sinopride's Glass Powder

Sinopride(www.spcera.net)'s glass powder products are more than just materials—they are solutions that empower performance enhancement for critical components across various industries. Whether it's industrial equipment needing to withstand extreme temperatures or precision electronic components with strict hermetic requirements, our Sealing Glass Powder delivers excellent sealing performance and long-term reliability.

• Refrigeration Compressor Terminals: In the refrigeration industry, compressor terminals must withstand high pressure and temperature cycles. Sinopride's Iron Sealing Glass (such as ST015, ST408) ensures terminal airtightness and insulation, preventing refrigerant leakage and ensuring efficient equipment operation .

• Battery Caps: High-energy batteries like lithium thionyl chloride batteries have extremely high sealing requirements to prevent electrolyte leakage and external moisture intrusion. We use SH604 model Sealing Glass Powder to provide long-term reliable sealing for battery caps, significantly improving battery life and safety .

• TO Headers and Connectors: In the fields of optical communications, sensors, and semiconductors, TO headers and various connectors are core components. Sinopride's Kovar Sealing Glass (SK016) ensures reliable glass-to-metal sealing for these precision components in various environments through perfect matching with Kovar alloy, safeguarding signal integrity and product life .

Why Sinopride Leads in the High-Temperature Sealing Field

H2: Performance Comparison with Competitors

 

Indicator	Sinopride High-Temperature Glass Powder	Traditional Sealing Materials
Thermal Compatibility	Deviation from metal <±0.5×10⁻⁶/°C	Deviation ±2–5×10⁻⁶/°C
Hermeticity	Leak rate < 1×10⁻⁹ Pa・m³/s	Leak rate 1×10⁻⁷–1×10⁻⁶ Pa・m³/s
Electrical Insulation	> 500 MΩ at 500V DC	100–300 MΩ
Production Scale	3 production lines, monthly output 100 tons	Limited to small-batch production

H2: Customer-Centric Advantages

• Custom Formulations: Tailored thermal expansion coefficients, colors, and chemical resistance for unique applications;

• ISO-Certified Quality: Strict testing (helium mass spectrometry leak detection, tensile strength > 2000N) ensures batch consistency;

• Global Supply Chain: A 10,000㎡ production base in Ganzhou, equipped with 7 metal-glass sealing lines.

Learn more

Kovar Sealing Glass and Iron Sealing Glass products

(https://www.spcera.net/kovar-sealing-glass.html)

Powder Glass Sealing in Vacuum and High-Temperature Environments

(https://www.spcera.net/powder-glass-sealing-in-vacuum-and-high-temperature-environments.html)