Silicon Metal – a Critical Need to Support the Silicone Rubber Industry

Silicon metal as an effectively purified silicon that we use to prepare silicon rubber having excellent temperature stability.

Advancements in silicon rubber technology have necessitated the need for high-performance materials thrusting silicon metal to the forefront due to its quality.

In this article, we explore some fundamental aspects about silicon metal. So, whether you want to learn about production process, applications or future trends – all information is right here:

Importance of Silicon Metal

This is the main raw material we need to synthesize silicone rubbermainly because of its exceptional qualities. Some of these distinct characteristics include flexibility, great tensile strength, and the ability to counter both low and high temperatures.

Such attributes make it an ideal material in industrial applications such as the automotive and aerospace industries among others.

With exceptional chemical properties and high purity, silicon metal remains the major raw material for the manufacturer of silicon rubber among other siloxanes.

Silicone Processing
Silicone Processing

How Silicon Matal Is Produced

This metal requires an intense forming process called ferrosilicon production that involves the use of complex machines. let us have a look at this process step-by-step:

1. Mining And Purification

The major raw material used in the production of silicon metal is quartz, which is mined and processed to remove undesired impurities. This ensures that the silicon is of the highest purity.

2. Smelting Process

Carbon in the form of boiler coal or wood chips is added to the silicon, mixed, and heated at temperatures above 2000°C. The electric arc furnaces used ensure that the silicon completely melts with carbon dioxide.

3. Refining

The molten silicon is collected from the electric furnace and taken through further purification processes. This enables it to attain high purity levels of about 98-99%.

4. Casting and Crushing

After further processing, the silicone is made into ingots or blocks and allowed to cool. It is further milled to reduce it into smaller particles or ground to fine powder depending on your application requirement.

Properties of Silicon Metal


Silicon metal possesses several properties that make it ideal for producing silicon rubber. Let us dive into some of them and briefly elaborate:

  • High Purity: purity levels of industrial grade silicon are exceptionally high at about 99% with minimal impurities. This is essential in determining the quality and effectiveness of silicones.
  • Thermal Stability: because silicon metal has a high melting point, the silicon rubber that is derived from silicon metal also has high and low heat stability.
  • Chemical Inertness: it is chemically unreactive and does not corrode very easily in most chemicals. This property enables it to create silicone rubber that does not easily degrade.
  • Electrical Conductivity: although silicon metal alone is a semiconductor, silicon rubber has outstanding electrical insulation. This makes it suitable for applications in the electrical and electronic fields.
  • Durability: silicone metal plays a major role in the durability of silicone rubber. this means that it can handle UV rays, and extreme weather conditions among other factors.

Challenges of Silicon Metal

Despite its critical role, you may still face a lot of challenges in the silicon metal industry. Let us dive into some of the notable ones.

  • Energy Intensity: producing silicon metal is an energy-consuming process that requires a lot of electricity. Providing a reliable energy source is key to the sustenance of this industry.
  • Raw Material Quality: the quartz used in the manufacturing of silicon metal greatly determines its purity. If the raw material is pure and clean, it will produce a high-quality silicon metal.
  • Environmental Impact: the production process is environmentally-intensive and contributes to the emission of large amounts of carbon. Environmental awareness is crucial to reduce the negative impact on the environment.
  • Supply And Demand Imbalance: an exponential rise in demand has led to a reduced supply of silicon metal
  • Geopolitical Risks: these risks may arise in terms of trading restrictions and political instability in producing countries. The best option is diversifying sources and building a resilient supply chain.

Future Trends with Silicon Metal

New technological discoveries and inventions have rapidly developed the field of production of silicon metal and silicon rubber. Some of these future trends include:

  • Measures to minimize the extent of negative environmental effects linked to silicon are in the course of being implemented.
  • Recycling silicon metal as a waste output started at a slow pace in the industry and is slowly being adopted.
  • Current technologies are used to develop new types of silicon having better features such as higher thermal stability
  • Current research work is focusing on enhancing the properties of silicone rubber through nanotechnology.

Applications of Silicon Rubber

Silicone Gasket
Silicone Gasket

We use silicon rubber, which is derived from silicon metal, in a wide array of applications across various industries. We can go through some of the notable ones while explaining its importance:

  • Automotive Industry

Due to its resilience to high temperatures and strength, we normally apply it as seals, gaskets, hoses, and insulations. These components enable the enforcement of performance integrity as well as the durability of automotive parts.

  • Electronics Industry

Mainly used for protection and dielectric purposes where flexibility is a necessity along with the protection of the parts of printed circuit boards. Due to its good electrical insulation, it can also produce pads, buttons, and switch gears.

  • Healthcare Industry

These applications include the use of silicon rubber in implants, seals, tubing, and medical devices. Biocompatibility and insolvency to sterilization processes make it fit for use in this industry.

  • Construction Industry

We use it for sealing and glazing since it is very elastic and provides waterproofing of joints in buildings. We also find other applications in coatings and adhesives.

  • Consumer Goods

Various consumer products made from silicon rubber include kitchenware, baby products, and personal care items. This is due to its non-toxic nature, durability, and mechanical stability at high temperatures.


A long-term supply of high-quality silicon metal is essential to the expansion of the silicon rubber industry. Understanding the roles and impact of silicon metal can assist you on how to aid in the advancement of this industry.


More resources:

Silicon Metalloids  – Source: LEGENDAY

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