Mill Mates Plus™

Zircoa Mill Mates and Mill Mates PlusDispersion and Milling Media Based Upon Ceria (Ce) Stabilized TZP*

Engineered to routinely process high viscosity formulations up to 50,000 cps, including: Automotive and Allied Paints, Inks, Dyes and Pigments, Magnetic Materials, Coatings and Dielectrics, Frits, Glazes and Ceramics, Foodstuffs, Pharmaceuticals, Cosmetics and Toiletries. Mill Mates provide maximum shear and throughput with minimal media contamination and mill wear.

*TZP is an acronym for Tetragonal Zirconia Polycrystals, a form of Zirconium Oxide. 

Highly Engineered Performance

Mill Mates are based on Tetragonal zirconia Polycrystals (TZP). The superior micro-structure of this material produces a finer grain of more uniform size. These properties make possible a dispersion media with a higher fracture toughness, density and hardness. Compared to the closest competing product(s), Mill Mates last longer and require fewer re-charges. Using Mill Mates will reduce mill wear and lessen downtime for maintenance, while it speeds processing time.

For a Wide Range of Formulations

Mill Mates’ highly engineered microstructure results in a bead that is extremely round, tough, fracture and wear resistant and dense. Mill Mates become highly polished, resulting in very low friction and abrasive qualities. Industries benefiting from these qualities include:

Features Benefits
Tetragonal Zirconia
Polycrystal (TZP) ................

Extremely wear resistant, Low contamination
Controlled, consistent
microstructure ....................

Predictable media performance, favorable hardness and toughness combination
Excellent roundness
and size distribution control ...

Maximum shear for increased efficiency in horizontal milling
Smooth
surface ..............................

Low mill wear, easily washed between formulations
High
density ..............................

Maximum throughput in recirculation grinding

Optimizing Mill Mates’ Mill Performance

Based on sieve analysis of nominal sizes, Mill Mates deliver a tighter size distribution than the closest competing product. This means more shear is available during processing.

To achieve optimum performance, bead surface area (a characteristic of bead size), together with agitation speed and throughput, must be balanced to the viscosity of the formulation. Other factors include:

  1. Screen Size — A bead size of at least 2 times larger than the screen size is recommended to avoid passage of beads.
  2. Wash Cycle — It is recommended that a solvent/resin mixture is used during wash cycle.
  3. Clearance — Space between the mill walls/bottom and the stator should be three to five times the size of the Mill Mates media being used. Failure to do so may increase the incidence of media fracture and shearing.

Mill Mates Plus™ —  The ultimate in Ceria Stabilized TZP technology.  Proprietary formulation allows for a finer, better controlled microstructure, provides extreme wear resistance, lower mill wear and increased milling efficiencies. The best dispersion value for your most demanding needs. Dark gray color.

Calculating the Correct Amount of Mill Mates

Horizontal Mill Size
(Void Volume)
Mill Mates (1mm)
 for 85% Charge
liters lbs kgs
15
20
45
100
200
110
148
333
740
1480
  50
  67
  151
  336
  673
Nominal Size* Range (mm) Packing Density
kgs/L lbs/L
.7 mm
1.0 mm
1.5 mm
2.0 mm
 .6 - .85 mm
.85 – 1.18 mm
1.4 – 1.7 mm
1.7 - 2.3 mm
3.906
3.938
4.028
4.063
8.61
8.68
8.88
8.96

* Other sizes available upon request.

Mechanical Properties

Property  Units Mill  Mates
Plus
Size - - 1mm
Composition - - (Ce-TZP) (b)
Density g/cm3 6.25
Hardness (HV) Kgf/mm2 1059
Fracture
Toughness, K1C
MPa/m1/2  8.3
Elongation - - 0.96
Crush
Strength
 lbs. force 149 (a)
Wear Rate*
    Bead
    Impeller 

%
%

0.1
0.01
Surface - -
Color - -  Dark Gray

*1 hour under Hydraulic Packing

(a) ASTM D1213-54
(b) Typical composition (wt %): ZrO2 80, CeO 20, SiO2 <.3, CaO <.7,
MgO < .2, Fe2O3 < .1, Al2O3 < .2, TiO2 <.1

Note:  Mill Mate PlusTM is a trademark of Zircoa, Inc.

Quackenbush Co., Inc.
6711 Sands Road
Crystal Lake, IL  60014
Ph: 815-479-8900   Fax: 815-479-8890
E-Mail: quackco@mc.net

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