Bell-type furnaces and lift-and-lower furnaces are typically used in industrial production and pilot-scale testing; they generally have high power ratings and substantial electricity consumption.
Twenty-five years ago, Germany’s BRANDS, in collaboration with Philips—the leading company in the ferrite manufacturing industry—developed a new sintering furnace. This innovation was specifically tailored to meet the unique needs of the ferrite industry. Since then, BRANDS’ bell-type furnaces have undergone continuous upgrades. The company has consistently aligned its offerings with the requirements of global leaders such as Philips, Siemens, TDK, and FDK, while these major players, in turn, have greatly benefited from BRANDS’ high-quality equipment.
Owing to the exceptional stability of products manufactured in bell-type furnaces, these furnaces have become the standard equipment for companies in the specialized ferrite production industry. Twenty-five years ago, a tunnel kiln produced by BRANDS is still in operation today, continuously delivering high-quality products for Philips.

The primary characteristic of the sintering furnaces offered by Zhongzhao Furnace is their efficiency. Its intelligent control system and associated equipment form a fully integrated functional unit, capable of fully meeting the near-artistic-level requirements of the ferrite industry.
Customers of bell-type furnaces can program and store any temperature/atmosphere profile as needed to produce high-quality products. In addition, they can promptly manufacture a wide range of other products based on actual demand, thereby shortening delivery times and reducing costs.
Sintering equipment must be highly adjustable to produce a wide range of products and continuously adapt to market demands. This means that products must be tailored to the specific requirements of individual customers.
A reputable ferrite manufacturer can produce more than 1,000 different types of magnets to meet customers’ specific requirements. All of this demands highly precise and repeatable control over the sintering process. Bell-type furnace systems have become the standard kiln for all ferrite producers.
In the ferrite industry, these kilns are primarily used for low-power, high-μ ferrites, particularly in the telecommunications sector. Producing high-quality magnetic cores without bell-type furnaces is simply impossible.
During sintering, the bell-type furnace requires only a small number of operators; loading and unloading can be carried out during the day, while sintering takes place at night, thereby enabling peak-shaving of electricity demand—a highly practical solution in today’s context of tight power supply.
The bell-type furnace delivers high-quality products, and any additional investment is quickly recouped thanks to this superior product quality. Precise control of temperature and atmosphere, coupled with optimized kiln design and meticulous management of internal airflow, ensures uniform heating and cooling throughout the entire product. During the cooling phase, atmospheric control is directly linked to kiln temperature, enabling oxygen levels as low as 0.005%—or even lower—levels that our competitors simply cannot achieve.
Thanks to the fully integrated alphanumeric input system, the sintering process can be carried out efficiently over extended periods, thereby ensuring product quality. This also serves as a testament to product quality when the products are sold.

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