3D printing of technical ceramics and metals

Ceramic and metal parts with accuracy down to 10 microns

We print parts on industrial DLP and SLA printers in alumina, zirconia, silicon carbide, piezoceramics, bioceramics, titanium, gold, silver and copper. From a single prototype to series production.

Send a model for a quote See materials

10.8 µmsmallest exposure pixel

from 2 µmminimum layer thickness

384×216mm — largest DLP platform, up to 200 mm high

Ø300mm — SLA platform, up to 150 mm high

15+ceramic and metal materials

What we make

Parts that are hard or impossible to machine or cast

Thin walls, lattices, internal channels, porous structures — the printer builds the part layer by layer, so a complex shape costs no more than a simple one.

Electronics

Insulators, substrates, sensor housings, piezo elements and ferrite cores.

Al₂O₃
BaTiO₃, PZT
ferrites

Industrial ceramics

Wear-resistant nozzles, bushings, impellers, filters, honeycomb catalyst carriers, heat-resistant tooling.

ZrO₂
Si₃N₄
Mg-PSZ
SiO₂

Semiconductors

Silicon carbide parts with Mohs hardness 9 and almost zero shrinkage: holders, cassettes, furnace and vacuum chamber parts.

SiC
Al₂O₃ 99%
SiO₂

Medical & dental

Zirconia crowns and prostheses, porous bone scaffolds, bioactive glass.

ZrO₂
hydroxyapatite
tricalcium phosphate

Jewellery

Pendants, beads, figurines and gifts in gold, silver and copper with fine detail.

Research & R&D

Prototypes in new materials: a test print needs less than 5 ml of slurry. We can develop a slurry for your application.

MOF
Ti-6Al-4V
custom slurry

How it works

Photopolymer printing with ceramics and metals

Ceramic or metal powder is mixed with a light-sensitive resin into a thick slurry. Light cures each layer; after printing, the resin is burned out and the part is sintered into a dense material.

Model preparation

We check the 3D model, add supports and scale it up to compensate for sintering shrinkage.

Printing

A blade spreads a thin 10–200 µm layer of slurry; a projector (DLP) or laser (SLA) cures the outline.

Debinding

The printed “green” part is heated slowly — the resin burns out, leaving a powder skeleton.

Sintering

High-temperature firing turns the skeleton into dense ceramic or metal — over 99% relative density.

About shrinkage. Parts shrink during sintering: alumina by about 17%, zirconia by 24%, silicon carbide by only 0.1%. We build this into the model in advance so the finished part comes out at the right size.

Materials

15 materials — plus custom slurries

Structural, functional and bioceramics, titanium alloy and precious metals. If the material you need is not listed, we can develop a slurry together.

AluminaAl₂O₃500 MPa strength, insulator, wear-resistant

ZirconiaZrO₂ (3Y)Strongest — 926 MPa; crowns and wear parts

SilicaSiO₂1% shrinkage; casting cores for turbine blades

Silicon nitrideSi₃N₄Thermal shock resistant; bearings, engine parts

Barium titanateBaTiO₃, PZTPiezo and dielectric ceramics for sensors

FerritesMO·xFe₂O₃Magnetic cores and rings

Silicon carbideSiCMohs hardness 9, 0.1% shrinkage

Tricalcium phosphateCa₃(PO₄)₂Resorbable bone implants

HydroxyapatiteCa₅(PO₄)₃OHBone scaffolds that mimic real bone

Magnesia-stabilised zirconia honeycomb discs

Mg-stabilised zirconiaMg-PSZHoneycombs, filters, heat-resistant carriers

Titanium alloyTi-6Al-4VLight, strong parts and impellers

Porous metal-organic framework cylinders

Metal-organic frameworksMOFPorous structures for filtration and catalysis

GoldAuJewellery with fine detail

SilverAgBeads, figurines, gifts

CopperCuHeat exchangers and conductive parts

Properties of the main slurries after sintering

Manufacturer data. Strength is flexural strength.

Property	Al₂O₃ (D99)	Al₂O₃ (PTD)	ZrO₂ (3Y)	SiO₂	SiC
Slurry
Powder purity, %	≥99	≥99	≥99	≥99	≥99.9
Solid content by mass, %	80	90	80	80	75
Viscosity, mPa·s	2600	2118	2440	7500	8200
Finished part
Shrinkage, %	16.7	5.6	24.2	1.1	0.1
Relative density, %	>99	>99	>99	>90	>90
Density, g/cm³	3.77	3.77	5.92	—	3.06
Porosity, %	<1	—	<1	<10	0.36
Flexural strength, MPa	500	302	926	70	Mohs 9
Thermal expansion, 10⁻⁶/K	8.8	—	11.5	—	—

Equipment

Three printer lines — from the lab to series production

Industrial ceramic and metal printers by Junjing Technology. Wavelength: 405 nm for DLP, 355 nm for SLA. Z-axis repeatability: 10 µm. Model formats: STL and CLI.

DLP · dual-vat · for small precise parts

Dual-vat DLP printer

The highest precision. Two vats allow printing with different slurries, and the vat can be heated up to 60 °C for thick slurries. A test print needs less than 5 ml of slurry — ideal for R&D and small batches.

10.8 µmpixel size (D20P model)

from 2 µmminimum layer

96×54×100mm, largest build area

metal + ceramicon one machine

Models and specifications

Model	Build area, mm	Pixel	UV power
J²-D96P	96 × 54 × 100	50 µm	0–50 mW/cm²
J²-D67P	67.2 × 37.8 × 100	35 µm	0–90 mW/cm²
J²-D20P	20.7 × 11.6 × 100	10.8 µm	70–200 mW/cm²

DLP · industrial · for series production

Industrial DLP printer

A high-power 4K projector cures a whole layer at once: large platform, high speed and stability. Suited to series production.

384×216mm, largest platform

200 mmbuild height

40–100 µmpixel size

10–200 µmlayer thickness

Models and specifications

Model	Build area, mm	Pixel	UV power
J²-D384P	384 × 216 × 200	100 µm	0–25 mW/cm²
J²-D202P	288 × 162 × 200	75 µm	0–30 mW/cm²
J²-D201P	192 × 108 × 200	50 µm	0–40 mW/cm²
J²-D200P	153.6 × 86.4 × 200	40 µm	0–55 mW/cm²

SLA · laser · for large parts and dark slurries

Laser SLA printer

A 1 W laser traces the outline of each layer. Works with both light and dark slurries (such as silicon carbide); round platform up to 300 mm.

Ø300mm, largest platform

150 mmbuild height

50 µmlaser spot

up to 120layers per hour

Models and specifications

Model	Build area, mm	Speed	Laser
J²-S100	Ø100 × 150	120 layers/h	1 W, 355 nm
J²-S200	Ø200 × 150	90 layers/h	1 W, 355 nm
J²-S300	Ø300 × 150	60 layers/h	1 W, 355 nm

Size & accuracy

From fingernail-sized miniatures to 30 cm parts

Printer platforms to scale, top view. The smaller the build area, the finer the pixel and the thinner the features.

Dual-vat DLPIndustrial DLPSLA (round platform)

Key figures

Largest part (DLP)384×216×200 mm

Largest part (SLA)Ø300×150 mm

Smallest exposure pixel10.8 µm

Layer thickness10–200 µm

Minimum settable layer2 µm

Z-axis repeatability10 µm

Density after sinteringup to >99%

The finished part is smaller than the build area by the material’s shrinkage.

How to order

Send us a model — we’ll quote price and lead time

Send a model or drawingA 3D model in STL (or CLI). No model? A drawing or sketch with dimensions will do.
Choose a materialNot sure which? Describe the operating conditions — heat, load, body contact, current — and we’ll recommend one.
Get a quoteWe’ll tell you which printer to use, the lead time and the price. For a new part we’ll offer a test sample.
Printing and sinteringWe print, debind and sinter, then check the dimensions.
DeliveryWe pack fragile ceramics carefully and ship by the method you prefer.

FAQ

Questions and answers

Can I order a single part?

Yes. The dual-vat DLP printer is designed for single prototypes and small batches; the industrial DLP and SLA printers handle series production.

Why will the ceramic part be smaller than the model?

During sintering the material densifies and the part shrinks: from 0.1% for silicon carbide to 24% for zirconia. We scale the model up in advance, so you get the part at the right size.

What files do you need?

A 3D model in STL or CLI format. If you don’t have a model, send a drawing or sketch and we’ll prepare one.

How small can the features be?

The smallest exposure pixel is 10.8 µm and the minimum layer is 2 µm. That allows thin lattices, micro-channels and jewellery-level detail.

The material I need isn’t listed

Printing slurries can be developed jointly for your application. A test print needs less than 5 ml of slurry.

How much does it cost and how long does it take?

It depends on the material, size and quantity. Send your model through the form and we’ll give you an exact price and lead time.