Kiln elements can last up to about 100 firings or so. Yet this does not mean that a kiln doesn’t require any help to last until that 100th firing. Kiln elements need a refractory ceramic coating for a few reasons. A common option for kilns is ITC 100 ceramic coating.
Here’s Why Kilns Require Thermal Insulation Coating For Best Results.
Kilns will on average reach a firing temperature between 1,800 to 2,400 degrees Fahrenheit. The purpose of a refractory coating is to provide a heat-resistant barrier to slow down the inevitable degradation of the kiln elements. Here’s what you need to know about ITC 100 ceramic coatings to get started.
How Does ITC Ceramic Coatings Work?
Ceramic coatings are a great method for protecting kiln elements. This is due to the natural refractory abilities of ceramic itself. In fact, ceramic coatings can provide resistance to temperatures up to 3,800 degrees Fahrenheit. However, the ITC 100 ceramic coatings have improved on the heat resistance of a plain ceramic coating. ITC coatings have a refractory ability of up to 5,000 degrees Fahrenheit.
What Types of ITC Coatings Are On the Market?
The ITC 100 ceramic coating is often used for kiln elements, however there are five types on the market.
ITC 200 EZ.This coating is actually meant to repair broken or cracked ceramic.
ITC 148.This coating is best for areas that experience abrasions. Its heavier coating is best for harsh environments.
ITC 100HT.This coating is the most often used due to its versatility.
ITC 213.This coating is actually applied directly to metals requiring heat protection.
ITC 296A.This is actually a top coat meant to reduce possible impurities from coming into contact with the objects fired within the kiln.
What Problems Might Come Up When Using ITC Ceramic Coatings?
The main problem that can occur with using ceramic coatings is to use the wrong one for the job. While there are only five types, applying the incorrect coating will not yield the best results. The purpose of the ceramic coating is to protect the kiln elements. This protection is compromised if the ceramic coatings are applied in the wrong order as well. As a simple guide, know that ITC 100 ceramic coating always goes first, and if needed, ITC 296A goes on last as a top coat.
Kiln elements could use a little help in the refractory department. The incredibly high temperatures make safety a top concern in all firings. Taking care of the interior of the kiln is just one more step to plan for during production.