Refractory Backup and Custom Granular Zirconium Oxide Materials

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Refractory Backup & Custom Granular Zirconium Oxide Materials

Zircoa Custom Granular Zirconium Oxide Engineered for a Wide Range of Extreme Environments

Refractory backup (also known as thermal insulation and grog) and custom granular Zirconium Oxide materials are available in unstabilized (pure) form or stabilized (combined) with yttrium oxide, magnesium oxide or calcium oxide for structural stability.

While pure zirconia has limited refractory applications, the stabilized granular forms are engineered to withstand breakdown due to extreme thermal shock and thermal cycling.

Specialized Zircoa granular products, covered elsewhere on our Website, include: Thermal Barrier Coatings, Setter Sands for Electronics and A Grain Zirconia. For more specific information on the unique properties of Zirconium Oxide, visit our Solutions page, or contact a product specialist to discuss your specific needs.

Zircoa’s refractory backup and granular materials are comprised of porous, irregularly shaped particles. The materials are available in a variety of banded or down mesh sizes. Custom milled materials as small as 0.5 microns are also available.

Zircoa’s granular materials possess excellent insulating properties. They have approximately five times the insulating value of alumina or magnesia. As an example: when used as a crucible backup (also known as grog) Zircoa granular materials will extend crucible life and result in cleaner melts.

Stabilization Types and Application Guidelines

Magnesia — Molten metal environments and environments subject to extreme wear
Yttria — Thermal barriers and in ionic conductive applications
Calcia — Continuous high temperature, or cycling applications with no molten metal contact

Typical Properties

	Yttria Stabilized Products	Magnesia Stabilized Products	Dual Stabilized Products	Monoclinic Products
SiO₂	0.5	08. - 1.5	2.0	0.2 - 1.25
CaO	0.2	0.45	4.50 Total CaO + MgO	0.20 - 0.75
MgO	0.05	1.70 - 3.50	4.50 Total CaO + MgO	0.1 - 0.35
Fe₂O₃	0.2	0.2	0.20	0.20
Al₂O₃	0.1	0.3	0.25	0.30
TiO₂	0.1	0.2	0.20	0.25
Y₂O₃	7.0 - 9.0	---	---	---

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Typical Screen Analyses

	Mesh Size (Tyler)	% (max or range)
-3+6	+3	10
	-3 +3.5	10-40
	-3.5 +4	20-50
	-4 +6	10-40
	-6 +8	5-35
	-8	20
-6 Mesh	+6	10
	-6 +8	10-40
	-8 +14	20-50
	-14 +28	10-40
	-28 +48	5-35
	-48 +100	0-25
	-100	30
-8 Mesh	+8	1
	-8 +14	32
	-14 +28	13-45
	-28 +48	20-45
	-48 +100	43
	-325	11
-14 Mesh	+14	0
	-14 +28	10-40
	-28 +48	15-25
	-48 +100	15-30
	-100 +325	20-40
	-325	0-10
-28 Mesh	+8	0
	+14	0
	-14 +28	0-9
	-28 +48	27-72
	-48 +100	18-36
	-100 +325	4-35
	-325	0-10
-100 Mesh	+48	1
	-48 +100	5
	-325	25
-325 Mesh	+200	5
(Wet Screen)	+325	15

Refractory Backup (Thermal Insulation)

Extend the life of your furnace, and maintain tighter control over your furnace temperatures with Zircoa’s pre-sintered grog refractory backup (www.zircoa.com/grog).

Zircoa Backup 1859 — Partially stabilized with magnesia and calcia. Available in -8+100, -8+14, -14+28, -28+48 and -48+100 Tyler mesh sizes.

Zircoa Backup 3001 — Partially stabilized with magnesia. Available in -8+14 Tyler mesh size.

Zircoa Backup 0125 — Monoclinic zirconia, not stabilized. Available in -8+14 Tyler mesh size.

Zircoa Backup 10B – Calcia stabilized bubble zirconia. Available in -10+30 Tyler mesh size.

Zircoa Grog 1593 — Magnesia stabilized. Available in -14+28, -28+48, -48+100, -100+325 and -325 Tyler mesh sizes.

NOTICE: Recommendations, property values, and application information we publish are based on various sources including measurements by us and others, and estimates of experience. We intend this to be a reliable guide, but we do not guarantee the applicability, completeness, or accuracy of the information. Users should make their own tests to determine the suitability of any product for their application.

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