W Type Silicon Carbide Heating Element for Muffle Furnaces

Introduction

ZYLAB w type silicon carbide heating element serves as a high-temperature heating device crafted from high-purity silicon carbide materials. It delivers excellent temperature resistance, thermal conductivity, and chemical stability.

We form it using a 500T press, which ensures uniform density throughout the element. Additionally, we apply a protective coating to the surface of the heating zone, significantly enhancing its oxidation resistance, extending its service life, and reducing the frequency of replacements.

The unique W-type design not only boosts heating efficiency but also guarantees uniform heat distribution. This makes it particularly well-suited for high-temperature furnaces, such as muffle furnaces.

It finds widespread application in ceramics, metals, glass manufacturing, and laboratories, providing reliable solutions for various high-temperature heating processes.

We offer customization options for the W-type silicon carbide heating element, allowing adjustments to diameter, length, and power according to different requirements.

Silicon carbide heating elements are customized products. Please provide detailed specifications and quantities, and we will offer you a free quote!

Customized products have a certain production cycle, typically ranging from 1 to 7 working days. The timeframe may vary for different specifications, so please consult customer service for specifics.

Key Features

1、Made from high-precision silicon carbide, it is a high-temperature, oxidation-resistant, and low-aging resistive heating element.

2、Provides uniform red heat, ensuring furnace temperature stability, low energy consumption, high efficiency, and environmental protection.

3、Resistor measurement at 1050°C during the final shaping process ensures consistent resistance and rapid heating.

4、Sintered through a 2200°C high-temperature vacuum furnace process, the hot and cold ends are bonded together, enhancing the toughness of the silicon carbide rod and extending its service life, making it less prone to arcing under high current impact.

Chemical Properties

SiC heating rods exhibit relatively stable chemical properties. Alkaline substances can chemically react with silicon carbide rods under high-temperature conditions, while acidic substances generally do not react.

During high-temperature use, silicon carbide rods can react with water vapor and oxygen to produce silicon dioxide, carbon dioxide, and hydrogen gas. As the amount of silicon dioxide in the silicon carbide rod increases, its resistance gradually rises, which is part of the aging process of the rod.

The hydrogen produced can react with oxygen to form water, creating a cyclical reaction, and it can also reduce the mechanical strength of the silicon carbide rod. Therefore, it is advisable to avoid excessive water vapor during use.

Specifications Requirements

Type: W

Outer diameter (OD): mm

Overall length (OL): mm

Hot zone length (HZ): mm

Cold end length (CZ): mm

Shank spacing (A): mm

Resistance: Ω (1050C +/-50C)

When ordering through ZYLAB, please specify your exact requirements and, if possible, attach drawings.

We offer free quotes for all silicon carbide rod products!

ZYLAB Offers the Following Types of Silicon Carbide Rods

• ED Type Silicon Carbide Heating Rod
• SC Type SiC Heater
• SCR Type SiC Heater
• DB Type SiC Heating Element
• U Type Silicon Carbide Heating Element
• W Type Silicon Carbide Heating Element
• H Type SiC Heating Rods
• Gun Type Silicon Carbide Heating Rod
• L Type Silicon Carbide Heating Rod

Installation of SiC Heating Rods

• Prepare spare parts.
• Open the top covers and remove the foams out of the furnace.
• Pick out the heating element and block which marked the same number, remove the stickers and put them into the mounting hole, until touch the bottom of the furnace chamber.
• Lift the heating element up one centimeter and fixed with a fixture.
• Connect the heating elements in series with the connecting pieces and fix them with the clamps.Keep a distance between the clamps to avoid short circuit.
• Connect the heating elements in series to the power supply.
• Fasten the fixtures when the temperature reaches 800 degree Celsius.
• Install the upper covers and chimney to complete the installation of the furnace.

Use of SiC Heating Rods

• The length of the heating section of the silicon carbide rod should equal the width of the furnace chamber. If the heating section extends into the furnace wall, it may cause damage to the wall.
• The length of the cold end of the silicon carbide rod should equal the thickness of the furnace wall plus the length that extends outside the wall. Typically, the cold end extends 50 to 150 mm to facilitate cooling and connection to fixtures.
• The internal diameter of the furnace accommodating the silicon carbide rod should be 1.4 to 1.6 times the outer diameter of the cold end. If the furnace opening is too small or the filling material inside is too tight, it can restrict the free expansion of the silicon carbide rod at high temperatures, leading to breakage. During installation, the silicon carbide rod should be able to rotate freely 360 degrees.
• The distance between the silicon carbide rod and the heated object or furnace wall should be greater than or equal to three times the diameter of the heating section. The center distance between silicon carbide rods should be no less than four times the diameter of the heating section.
• The cold end of the silicon carbide rod should be connected to the main circuit using aluminum braids or aluminum foil.
• Before use, silicon carbide rods should be matched for resistance. Connect rods with the same or similar resistance values together.
• When using silicon carbide rods, it is important to choose reasonable surface load density and operating temperature.
• When replacing silicon carbide rods, choose rods with resistance values close to those of the rods currently in operation. If necessary, replace all rods in the furnace to enhance their lifespan. If the removed rods have suitable resistance values, they can be reused later in the operation of the electric furnace.