Choosing a Heating Element for Dental Sintering Furnaces

Dental zirconia sintering furnaces are a special case: a small chamber, a high and tightly controlled temperature, and a need for clean, repeatable heat. Here is how to spec the element.

Our dental zirconia sintering guide gives the temperature and grade detail.

What a dental furnace needs

Requirement	Recommended element spec
Sintering temperature	~1500–1550°C hold → EQ1800 MoSi2
Chamber size	Compact → Φ4/9 U-type
Atmosphere	Air / oxidising (standard)
Heat-up	Fast, low thermal mass
Mounting	Single-ended U, one-wall penetration

Spec checklist

Grade: EQ1800 for the 1500–1550°C zirconia hold (gives margin over EQ1700).
Diameter: Φ4/9 fits most bench-top dental units (e.g. Sirona HTC Infire); verify against your drawing.
Quantity & layout: match the original element count and U-bend reach.
Shank spacing: match your furnace wall thickness and terminal layout.

See our diameter guide and temperature grades for the supporting numbers.

About the author: This guide was prepared by the HeatingDriver technical team — heating-element engineers with nearly 20 years of experience supplying MoSi2 and SiC elements to dental, ceramics and research labs worldwide. Need a sizing check? Browse our MoSi2 elements or send us your furnace drawing.

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Frequently Asked Questions

Q: Which MoSi2 grade suits a dental zirconia sintering furnace?

EQ1800 for the roughly 1500–1550°C zirconia hold. It gives useful margin over EQ1700 at that sustained sintering temperature.

Q: Which element diameter fits a bench-top dental unit?

Φ4/9 U-type fits most bench-top dental furnaces, for example the Sirona HTC Infire, but always verify the size against your own furnace drawing before ordering.

Q: What besides grade and diameter has to match the original?

Match the element count and U-bend reach for the layout, and match shank spacing to your furnace wall thickness and terminal arrangement. Dental furnaces normally use single-ended U elements with one-wall penetration.

Q: Why is MoSi2 well suited to dental sintering?

A dental furnace has a small chamber, a high and tightly controlled temperature, and a need for clean, repeatable heat. MoSi2 delivers fast heat-up with low thermal mass in a standard air or oxidising atmosphere, which fits that duty.