95% Alumina Ceramic Insulating Blocks and Ceramic Support Blocks

Alumina ceramic insulating blocks are three-dimensional structural components made from high-purity alumina (Al₂O₃) ceramic. They are more than just a simple insulating material; they are key engineering components that combine multiple functions, including insulation, structural support, heat resistance, and thermal conductivity.

Unlike sheet-like insulating plates, insulating blocks typically feature greater thickness and complex geometries (such as holes, slots, and steps). They are primarily designed to withstand mechanical stress, precisely position and support other components, and provide reliable electrical isolation in extreme environments.

The performance of alumina ceramic insulating blocks depends primarily on the purity of the alumina. Commonly available grades are 95% and 99%. 95% alumina is suitable for most general industrial applications and offers the best value. 99% alumina is suitable for cutting-edge applications requiring extreme thermal conductivity, high-temperature resistance, and corrosion resistance.

Alumina ceramic insulating blocks offer the following advantages and features:

• Functional Integration, Multi-Purpose: They simultaneously address insulation, support, heat dissipation, and wear resistance, simplifying equipment design.
• High Reliability and Long Life: They maintain stable performance under harsh operating conditions such as high temperature, high pressure, and high wear, with a lifespan far exceeding that of ordinary plastic or resin insulating materials, reducing maintenance costs.
• Safe and Environmentally Friendly: Non-toxic, odorless, and releases no harmful gases, meeting environmental standards.
• Highly Cost-Effective (especially 95% alumina): Its cost is relatively low among advanced ceramic materials, compared to its excellent performance and long lifespan, making it economical and practical.

Alumina ceramic insulating blocks are essential components for the following industries:

Applications	Specific Application Examples
1. Power and energy	- High/Medium Voltage Switchgear: Serves as busbar support insulators, securing and insulating high-voltage conductors. - Transformers/Reactors: Serves as spacers between coils to ensure insulation and provide cooling airflow. - New Energy Vehicles: Provides insulation support and securement for high-voltage connections within battery packs.
2. Industrial heating and metallurgy	- Industrial Kilns (Sintering Furnaces, Brazing Furnaces, etc.): Used as furnace supports, furnace rollers, guide rails, kiln car spacers, etc., to withstand high temperatures and heavy loads. - Heating Elements: Insulated mountings for the ends of electric heating tubes and silicon carbon rods.
3. Electronics and semiconductors	- Semiconductor Manufacturing Equipment: Serves as wafer boat support paddles and insulating fixtures in diffusion furnaces and CVD equipment, requiring high purity and high-temperature resistance. - Power Electronics Modules: Serves as an insulating heat dissipation substrate (thick block) for high-power devices such as IGBTs.
4. Machinery and Automation	- High-temperature sensor standoffs: Secure and protect sensors in high-temperature environments. - Wear-resistant guide rails and bushings: Used in areas with relative motion and requiring insulation. - Precision instruments: Utilize their low coefficient of thermal expansion for dimensionally stable reference blocks.
5. Other industries	- Lasers: Insulating supports for laser tubes or optical components. - Vacuum Technology: Insulating feedthroughs and supports within vacuum chambers.