Choosing between Ceramic and Quartz Heating
A
Hawco product story
Edited by the Engineeringtalk editorial team
Jan 8, 2001
Ceramic Elements are the heaters of choice in most applications, but Quartz heaters are favoured in industrial applications where rapid heater response is necessary, as this article explains.
Ceramic Heaters are efficient, robust heaters, which provide Long Wave Infrared Radiation.
They are used in applications ranging from thermoforming to pre-heating to paint curing.
Nearly all materials to be heated or dried provide maximum absorption in the 3-10 microns range.
The Ceramic Heater was developed with this fact in mind, and is the reason why they can be applied to such a diverse range of industrial processes The Ceramic Heater is produced using a specialised process which involves an alloy resistance wire around which is cast a ceramic body.
This body is then glazed to protect it from moisture ingress.
It also protects the heater from atmospheric and corrosive attack.
In this way the ceramic element optimises the maximum absorption characteristics, as they operate at temperature of 300C to 750C (572F to 1382F) producing a wavelength of 3-6 microns.
The Ceramic Heater has been designed to offer high efficiency (up to 85% in properly designed systems), flexibility in zoning, interchangeability for maintenance, long life and uniformity from element to element.
Ceramic Elements are the heaters of choice in most applications, where radiant efficiency at competitive cost is required.
Quartz Heaters provide Infrared Radiation in the medium wavelength of 1.5 to 5.6 microns.
They are favoured in industrial applications where rapid heater response is necessary.
They are most cost effective in systems with long heater off cycles as they reach operating temperature in a matter of seconds.
Being similar in size to Ceramic Emitters, they can easily be used in systems where zone control of the heater area is a requirement.
They have a recommended radiation distance of 100-200mm.
Quartz Infrared Heaters consist of a wound resistance coil which is run through a series of parallel Quartz Tubes, all of which is encased in a highly reflective aluminised steel body.
The reflective body ensures a low loss of radiation from the back of the heater.
All elements are load tested as standard as well as 1500Vearth leakage test as standard.
Quartz heaters come in different ranges of wattage and voltage, with 220V/240V being the standard.
Variations on wattage and voltage available on request.
The standard dimensions are described by the full Quartz element, 247 x 62.5 x 22mm (FQE) and the Half Quartz Element, 124 x 62.5 x 22mm (HQE).
Element dimensions and design can be adjusted to suit customers heating requirements.
Quartz Elements can also be supplied with an in-built type K thermocouple.
Hawco are specialist distributors for these styles of heaters.
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