Zirconia Ceramic Plungers

Ground and polished zirconia plungers for dosing pumps and high pressure cleaners.

machinery
optical fiber
cutting tools
medical treatment
food
petroleum

Zirconia Ceramic Plungers specification
Material	Zirconia
Color	White, black
Shape	Custom
Size	Custom
Density	6.0 g/cm3
Flexural Strength	800 Mpa
MONS' Hardness	8.2

Request A Quote Request A Sample Email Us

Overview

Zirconium oxide ceramics are white, yellow or gray when containing impurities, and generally contain HfO2, which is not easily separated. In terms of structural ceramics, zirconia ceramics are widely used because of their high toughness, high flexural strength and high wear resistance, excellent thermal insulation properties, and a thermal expansion coefficient close to that of steel.

Key Benefits

High strength
High hardness
Impact resistance
Wear resistance
Corrosion resistance
Smooth surface
Low thermal conductivity
Non-magnetic

Problems It Solves

A steel plunger scores and loses its seal once abrasive particles get into the fluid.

Application Scenarios

Plungers
Ceramic shafts
Optical fiber sleeves
Ferrules
Grinding media
Ceramic cutters
Ceramic guide rails
Mechanical plunger dispensing valves
Mobile phone cases
Watch cases
Hairdressing scissors blades

Who It Is For

Pumps Valves And Fluid HandlingPlungers, discs, seal rings and wear sleeves

Specifications

Zirconia Ceramic Plungers specification
Material	Zirconia
Color	White, black
Shape	Custom
Size	Custom
Density	6.0 g/cm3
Flexural Strength	800 Mpa
MONS' Hardness	8.2

Material Data

Zirconia Ceramic Properties
Item	Unit	Typical value
Physical Properties
Colour		white
Density	g/cm3	6.0
Zirconia Content	%	94.40%
Gas permeability		0
Water Absorption	%	0%
Crystal Size	um	0.5
Mechanical Properties
Rockwell Hardness (45N)	R45N	78
Vickers Hardness (Load 500g)	GPa(Kg/mm2)	11.5 (1175)
Flexural Strength (20C)	MPa	800
Compressive Strength (20C)	MPa	2000
Modulus of Elasticity (20C)	GPa	> 200
Fracture Toughness (20C)	MPam1/2	9.0
Thermal Properties
Thermal Conductivity (20C-400C)	W/(m.K)	2.5
Thermal Expansion Coefficient	10-6/C	9.6
Thermal Shock Resistance	dT C	250

Manufacturing Process

Material And Drawing ReviewWe start from your drawing, sample or performance requirement and confirm which of the five material families fits the duty.
Powder Preparation And FormingDry pressing, hot pressing or injection moulding, chosen by the shape and the wall thickness of the part.
High Temperature SinteringParts are sintered to full density. Zirconia reaches 6.0 g/cm3 and 99% alumina reaches 3.85 g/cm3.
Grinding Polishing And CNCSurface grinding, internal and external diameter grinding and precision CNC machining bring the part to final size and finish.

Quality Control

We promise to provide quality assurance for all products. Parts are inspected according to your drawings and we issue an inspection report with the shipment.

We follow standard packaging protocols to protect your products during transit and provide photographic documentation of the packing and shipping process for your reference. In the event of transportation damage caused by non-human factors, we arrange a free replacement shipment.

From raw material preparation, forming, surface grinding, internal and external diameter grinding, to precision CNC machining, all processes are carried out in house under strict quality control.

See the full quality page

Customisation Options

Size and shape made to your drawing
Material grade selected against the duty rather than assumed
Surface finish, including ground and polished faces
Colour where the material allows it
Metallizing and plating where the part has to braze into an assembly

Our main business is OEM and ODM. Send your drawing over WhatsApp or email and we will quote the part.

Comparison With Other Materials

Published values from our own material tables
Property	Zirconia	Alumina	Steatite
Flexural strength	Zirconia 800 MPa	99% alumina 330 MPa	Steatite relatively high
Fracture toughness	Zirconia 9.0 MPam1/2	99% alumina 4 MPam1/2	Not published
Max use temperature	Zirconia not rated here	99% alumina 1650C	Steatite 1100C
Thermal conductivity	Zirconia 2.5 W(m.K)	99% alumina 27.5 W(m.K)	Good
Density	Zirconia 6.0 g/cm3	99% alumina 3.85 g/cm3	Talc based
Dielectric strength	Zirconia not published	99% alumina >10 KV/mm	Excellent

Read the full material comparison

Use Guide

Confirm the fit before you order volumeTake a free sample first. Samples ship in 4 to 7 working days and we do not charge for the part, only the freight.
Give the critical dimension a toleranceCeramic is ground to size after sintering. Marking one dimension as critical is cheaper than treating them all as critical.
Handle by the body, not the edgeCeramic is hard but it chips. Zirconia tolerates handling far better than alumina because its fracture toughness is more than twice as high.
Tell us the duty, not just the shapeTemperature, fluid, load, speed, and whether the part has to insulate or stay non-magnetic, all change which grade we would quote.

Questions About This Part

Can this part be made to our drawing?

Yes. We can supply the products according to the customer's drawings, samples and performance requirement.

What is the minimum order quantity?

MOQ depends on the size and the forming route. Send the drawing and we will confirm it with the quotation.

How long does a sample take?

Sample delivery is 4 to 7 working days, free of charge, freight not included.

What are the payment terms?

Payment up to 1000 USD is 100% in advance. Above 1000 USD it is 50% T/T in advance with the balance before shipment.

How will the parts be packed?

We follow standard packaging protocols and provide photographic documentation of the packing and shipping process for your reference.

Related Services

Precision Grinding And PolishingFlat processing, precision processing and polishing

Get A Price On Zirconia Ceramic Plungers

Send the drawing, the quantity and the duty. Samples are free and take 4 to 7 working days.