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Grinding Media

YSZ Grinding Media   Zirconium Silicate Grinding Media
We also supply ZTA Grinding Media and Alumina Grinding Media. Please contact us at sales@stanfordmaterials.com

YSZ Grinding Media:

YSZ Grinding Media Properties     Applications of YSZ Grinding Media     Products of YSZ Grinding Media     YSZ Powders

YSZ Grinding Media YSZ (Yttria Stabilized Zirconia) grinding media feature high density, toughness and super hardness, enabling to achieve superior grinding efficiencies compared with other conventional grinding media such as Alumina and Agate. The high wear-resistant YSZ grinding media effectively eliminate product contamination and lengthen service life of the grinder. These special features make YSZ grinding media especially suitable for sensitive products and critical applications. YSZ grinding media are widely used for high viscosity, wet grinding and dispersion.

YSZ Grinding Media Properties

Items	Unit	Typical Values
Composition	wt%	94.9% ZrO2 + 5.1%Y2O3
Bulk Density	kg/L	3.5
Specific Density	g/cm3	> 6.0
Hardness(HV)	GPa	> 10
Modulus of Elasticity	GPa	200
Thermal Conductivity	W/m.K	3
Thermal Expansion Coefficient	10x10-6/k (20 to 400)	9.6
Crushing Load	KN	> 15
Fracture Toughness	MPam½	8
Grain Size	µm	< 0.5

Applications of YSZ Grinding Media:

1. High strength and high toughness products Dielectric materials Piezo electric materials Mangnetic materials 2. Wear and corrosion resistance products Coating Textile Pigment dispersions Ink and dyestufts

3. Prevention of product contamination Pharmaceutical Foods 4. Ceramics: Electronics ceramics Refractory ceramics Engineer ceramics Nanometer Materials

Produts of YSZ Grinding Media:

YSZ Ceramic Balls

YSZ Ceramic Balls
Item No.	Description	Lot Size	US$
YSZ-B0.5	YSZ Ceramic Balls, Diameter: 0.5 mm	20 kg 100 kg	Ask for a Quotation
YSZ-B0.8	YSZ Ceramic Balls, Diameter: 0.8 mm	20 kg 100 kg	Ask for a Quotation
YSZ-B1.0	YSZ Ceramic Balls, Diameter: 1.0 mm	20 kg 100 kg	Ask for a Quotation
YSZ-B1.2	YSZ Ceramic Balls, Diameter: 1.2 mm	20 kg 100 kg	Ask for a Quotation
YSZ-B1.5	YSZ Ceramic Balls, Diameter: 1.5 mm	20 kg 100 kg	Ask for a Quotation
YSZ-B2	YSZ Ceramic Balls, Diameter: 2 mm	20 kg 100 kg	Ask for a Quotation
YSZ-B3	YSZ Ceramic Balls, Diameter: 3 mm	20 kg 100 kg	Ask for a Quotation
YSZ-B5	YSZ Ceramic Balls, Diameter: 5 mm	20 kg 100 kg	Ask for a Quotation
YSZ-B6.5	YSZ Ceramic Balls, Diameter: 6.5 mm	20 kg 100 kg	Ask for a Quotation
YSZ-B10	YSZ Ceramic Balls, Diameter: 10 mm	20 kg 100 kg	Ask for a Quotation
YSZ-B12	YSZ Ceramic Balls, Diameter: 12 mm	20 kg 100 kg	Ask for a Quotation
YSZ-B15	YSZ Ceramic Balls, Diameter: 15 mm	20 kg 100 kg	Ask for a Quotation
YSZ-B20	YSZ Ceramic Balls, Diameter: 20 mm	20 kg 100 kg	Ask for a Quotation
YSZ-B25	YSZ Ceramic Balls, Diameter: 25 mm	20 kg 100 kg	Ask for a Quotation
YSZ-B30	YSZ Ceramic Balls, Diameter: 30 mm	20 kg 100 kg	Ask for a Quotation
Other sizes may also be available based upon customers' request.

 

YSZ Ceramic Cylinders

YSZ Ceramic Cylinders
Item No.	Description	Lot Size	US$
YSZ-C5.5X5.5	YSZ Ceramic Cylinders, Dia. 5.5 x 5.5 mm	20 kg 100 kg	Ask for a Quotation
YSZ-C7X7	YSZ Ceramic Cylinders, Dia. 7 x 7 mm	20 kg 100 kg	Ask for a Quotation
YSZ-C7.5X7.5	YSZ Ceramic Cylinders, Dia. 7.5 x 7.5 mm	20 kg 100 kg	Ask for a Quotation
YSZ-C10X10	YSZ Ceramic Cylinders, Dia. 10 x 10 mm	20 kg 100 kg	Ask for a Quotation
YSZ-C12.7X12.7	YSZ Ceramic Cylinders, Dia. 12.7 x 12.7 mm	20 kg 100 kg	Ask for a Quotation
YSZ-C15X15	YSZ Ceramic Cylinders, Dia. 15 x 15 mm	20 kg 100 kg	Ask for a Quotation
Other sizes may also be available based upon customers' request.

Zirconium Silicate Grinding Media:

Zirconium Silicate Grinding Media Properties   Applications of Zirconium Silicate Grinding Media    Products of Zirconium Silicate Grinding Media    Suggestions of Zirconium Silicate Grinding Media Opperation

Zirconium Silicate Grinding Media High Grinding Efficiency Grinding and dispersing efficiency are significantly improved owing to the beads’ possession of higher kinetic energy created by its big specific gravity. In the course of grinding, as a result, outlet speed and flow rate increase while circulation time as well as required grinding time drops. You will have both finished products in desired fineness and improved productivity. High density, high tenacity, impact-resistance and low wear. The advantage of its superior wear-resistance is highlighted especially in grinding of products with high precision and high solid content. Highly stable chemical properties, corrosion-resistance, make it applicable as both acid and alkaline media. Smooth surface makes cleaning an easy work. Far less wear will take place to mechanical equipment.

Zirconium Silicate Grinding Media Properties

Items	Unit	Typical Values
Composition	wt%	68.5% ZrO2 + 5.1%SiO2
Bulk Density	kg/L	2.35
Real Specific Density	g/cm3	3.86
Mohs Hardness(HV)		7.2
Compressive Strength	N	200
Melting Point	F	2120-2820

Zirconium Silicate Grinding Media Applications

Zirconium Silicate Grinding Media Produts

Zirconium Silicate Ceramic Balls
Item No.	Description	Lot Size	US$
ZS-B0.07	Zirconium Silicate Balls, Diameter: 0.07-0.125 mm	25 kg 100 kg 500 kg	Ask for a Quotation
ZS-B0.125	Zirconium Silicate Balls, Diameter:0.125-0.25 mm	25 kg 100 kg 500 kg	Ask for a Quotation
ZS-B0.2	Zirconium Silicate Balls, Diameter: 0.2-0.4 mm	25 kg 100 kg 500 kg	Ask for a Quotation
ZS-B0.4	Zirconium Silicate Balls, Diameter: 0.4-0.6 mm	25 kg 100 kg 500 kg	Ask for a Quotation
ZS-B0.6	Zirconium Silicate Balls, Diameter: 0.6-0.8 mm	25 kg 100 kg 500 kg	Ask for a Quotation
ZS-B0.8	Zirconium Silicate Balls, Diameter: 0.8-1.0 mm	25 kg 100 kg 500 kg	Ask for a Quotation
ZS-B1.0	Zirconium Silicate Balls, Diameter: 1.0-1.2mm	25 kg 100 kg 500 kg	Ask for a Quotation
ZS-B1.2	Zirconium Silicate Balls, Diameter: 1.2-1.4 mm	25 kg 100 kg 500 kg	Ask for a Quotation
ZS-B1.4	Zirconium Silicate Balls, Diameter: 1.4-1.6 mm	25 kg 100 kg 500 kg	Ask for a Quotation
ZS-B1.6	Zirconium Silicate Balls, Diameter: 1.6-1.8 mm	25 kg 100 kg 500 kg	Ask for a Quotation
ZS-B1.8	Zirconium Silicate Balls, Diameter: 1.8-2.0 mm	25 kg 100 kg 500 kg	Ask for a Quotation
ZS-B2.0	Zirconium Silicate Balls, Diameter: 2.0-2.5 mm	25 kg 100 kg 500 kg	Ask for a Quotation
Other sizes may also be available based upon customers' request.

Suggestions of Zirconium Silicate Grinding Media Operation

Zirconium Silicate Grinding Media Operation Instruction

• Clean the Mill chamber before charging with the beads.
• Select beads of appropriate specifications according to the Mill volume, slurry viscosity and outlet clearance.
• Test if the slurry viscosity meets requirements and check if the machine’s outlet clearance and rotation speed are appropriate.
• In first use of the beads, it is recommended to pre-grind the beads in f fluid mix (resin and solvent) of certain viscosity for 30 minutes. When low-viscosity solvent is employed for pre-grinding, it is required to reduce the rotation speed and limit the duration to 15 minutes. (Note: Beads labeled as “pre-ground” need no pre-grinding during operation.)

• For low viscosity slurry, dispersion disc peripheral speed should not exceed 14m/s.
• Due to the high kinetic energy of the beads, it is not necessary to operate at high rotation speeds to disperse high-solid-content and high-viscosity products.
• For paint grinding, it is suggested resin should be used to clean the beads. If Solvent is required for that purpose, reduce the rotation speed and have the cleaning done within 10 minutes. Intermittent cleaning operation “On-Off” is recommended.

Adding Zirconium Silicate Grinding Media Beads

• An extremely small number of ceramic beads would be broken by high-speed impacts after long time of grinding. It is required to make up the bead load at regular time.
• Sieve out and weigh the broken beads, then add fresh ones of same weight.
• Additional quantity of beads should be loaded for prolonged grinding time if the desired fineness of the finished product remains unchanged.
• In case the finished product should not meet the required fineness within a prescribed period of time, additional quantity of beads should be needed.

Recommended Ball Charge

Chamber Volume (L)	Sealed Mill (kg)		Open Mill (kg)
	Horizontal	Vertical	Vertical
8	15-16	13-15	11-13
15	28-29	24-28	21-24
30	55-59	48-55	41-48
45	83-88	72-83	62-72
60	110-117	97-110	83-97
115	212-225	185-212	159-185
225	414-440	362-414	310-362

Note of Zirconium Silicate Grinding Media

• Mills of sealed type should not be overloaded lest the machine and the beads be damaged..
• Mills of open type should be optimally loaded with the beads. In case of unsmooth running, reduce the bead charge gradually..
• The bead charge shall be 80-85% for sealed horizontal, 70-80% for sealed vertical and 60-75% for open types Mills..

Bead Size Selection of Zirconium Silicate Grinding Media

Following conditions shall be taken into account in bead size selection:

• Nature of solid component of slurry.
• Viscosity of the slurry..
• Particle size of pigments to be ground or dispersed, desired fineness of finished products..
• Specification of outlet clearance of the Mill machine or the filter screen, generally, the size of the smallest beads should be at least twice that of the separator screen or rotating gap separator..
• The distance between the outer edge of the dispersion disc and the grinding chamber should be four times of the diameter of the largest bead..

Surface Treatment of Zirconium Silicate Grinding Media

1. Mold cleaning

2. Burring, polishing, buffing

3. Cleaning of non-ferrous alloy, stainless steel and plastic parts

4. Releasing of welding stress

5. Mechanical polishing

6. Processing after coating

Zirconia ceramic beads produced under electrofusion process feature the following characteristics:

• Strength equaling that of steel beads, stronger than glass beads.
• Enough and appropriate plastic metallic depth.
• Low broken rate...
• Even-distributed surface roughness.
• Free of dust contamination.
• Dispense with further dirt elimination treatment to stainless steel and alloy of nonferrous metal. Mainly applied to pre-stressing processing in space-flight industry, suitable for application in compressed air jet machine, irrespective of wet or dry process. Also applicable in surface treatment in turbo system, such as cleaning, polishing and burring, etc….

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