EQ1800U MoSi2 Heating Elements: 1800°C for Dental & Technical Ceramics

EQ1800U is the dental and technical-ceramics workhorse. It is rated to 1800°C, which gives comfortable headroom above the 1450–1550°C window used for zirconia sintering — and that headroom is the main reason dental furnaces standardise on it.

Specification at a glance

Parameter	EQ1800U value
Maximum element temperature	1800°C
Typical chamber hold	1450–1700°C (dental & technical ceramics)
Surface load at 1800°C (planning max)	~6 W/cm²
Atmosphere	Air / oxidising; reduced limit in reducing gas
Common diameters	Φ4/9 (dental), Φ6/12 (general)

Surface-load planning values are in the surface-load and current-limits guide; the full data set is in the complete MoSi2 spec sheet.

Why dental furnaces standardise on EQ1800

Zirconia sintering holds around 1450–1550°C. Running EQ1800 at that temperature puts the element far below its 1800°C ceiling, which is exactly what gives multi-year life. Our dental sintering guide and element-selection guide show how grade and diameter combine for a dental build, and we supply the Φ4/9 U-type element for Sirona HTC Infire as a direct replacement.

Grade context

EQ1800 sits between EQ1700 (everyday 1650°C work) and EQ1850 (1750–1800°C lab work). The EQ1700/1800/1850 temperature explainer helps you fix the grade to your hold temperature.

About the author: Prepared by the HeatingDriver Application Engineering team, engineers with nearly 20 years of experience in high-temperature elements for dental, ceramics and research furnaces. Browse EQ1800U elements or send us your furnace drawing.

Shop EQ1800U or contact us for a dental-furnace element quote.

Why specify with HeatingDriver

Why specify with HeatingDriver — HeatingDriver is a manufacturer and exporter of MoSi2 (molybdenum disilicide) heating elements with nearly 20 years of experience. We supply EQ1700U / EQ1800U / EQ1850U grades for 1700–1850°C, free drawing review, custom sizes and shapes, and technical support for furnace builders worldwide. Browse our MoSi2 heating elements.

What is EQ1800U MoSi2?

EQ1800U is the 1800°C MoSi2 grade widely used for dental zirconia sintering and technical ceramics.

Why is EQ1800U popular for dental furnaces?

Dental zirconia sinters near 1450–1550°C, and EQ1800U gives comfortable margin to 1800°C with long element life in air.

What diameters come in EQ1800U?

EQ1800U is offered in Φ 4/9, Φ 6/12 and other standard sizes, including compact diameters for dental furnaces.

What surface load applies?

EQ1800U elements run at 4–9 W/cm² surface load in oxidising atmosphere.