Fused Silica Crucibles · CZ Silicon Growth · Solar · Lab
Quartz Crucible Manufacturer & Supplier
A quartz crucible is a container made from high-purity fused silica used to hold and melt material at very high temperature without contaminating it. Also called a fused silica crucible, it is central to CZ silicon crystal growth, solar polysilicon processing and laboratory fusion and melting. FGQuartz has manufactured quartz crucible products since 2005 from Lianyungang, China, supplying standard and fully custom crucibles to buyers worldwide.
- High Purity
- Fused Silica
- Grade matched to your needs
- High Heat
- Melt & Crystal Growth
- CZ & fusion temperatures
- Custom Size
- Cylindrical / Conical
- Lidded · tall · large
- Est. 2005
- 20 Years’ Experience
- Ships worldwide
What Is a Quartz Crucible?
A quartz crucible is a high-purity fused silica vessel designed to hold molten material — most often silicon — at very high temperature. Because it is almost pure SiO₂, it withstands the heat of melting and crystal growth while adding almost no impurities to the melt.
Why a fused silica crucible instead of metal, graphite or ceramic? Metals melt or react with the charge, graphite introduces carbon, and many ceramics shed particles or contaminate sensitive melts. A quartz crucible delivers the purity, thermal stability and clean melt contact that silicon crystal growth and analytical fusion demand, which is why it is the standard vessel for CZ pulling and solar silicon.
Key Properties of Fused Silica Crucibles
High Purity
High-purity fused silica with low metallic impurities keeps silicon melts and analytical samples clean.
High-Temperature Stability
Holds shape through the high heat of silicon melting and crystal growth, with a softening point near 1680 °C.
Clean Melt Contact
Inert fused silica adds almost no contamination to the melt, protecting crystal quality and yield.
Thermal-Shock Resistance
A very low expansion coefficient helps the crucible survive heat-up and cool-down cycles.
Chemical Inertness
Resistant to most acids and reagents (excluding hydrofluoric acid) for fusion and analytical work.
Clear or Opaque Walls
Clear walls allow melt observation; opaque or coated walls help retain and spread heat in the furnace.
Types of Quartz Crucible We Supply
From CZ silicon-growth crucibles to laboratory fusion crucibles and large custom vessels, the range below covers the most requested quartz crucible formats. Tell us the application and we will match the right type and grade for you.
CZ Silicon-Growth Crucible
CZ quartz crucible for Czochralski silicon crystal pulling, the core vessel of monocrystal growth.
CZ / silicon growth crucible
Solar / PV Crucible
Solar quartz crucible for polysilicon melting and PV silicon processing.
Solar / photovoltaic grade
Laboratory Fusion Crucible
Fused silica crucible for ashing, fusion, melting and high-temperature analytical work.
Lab fusion / melting
Lidded Crucible
Crucible supplied with a quartz lid or cover to reduce evaporation and contamination.
With lid / cover
Lidless / Open Crucible
Open-top crucible in cylindrical or conical form for general melting and fusion.
Open top · cylindrical / conical
Tall / Low Form Crucible
Tall or low profiles to suit furnace geometry and the volume of material being melted.
Tall form / low form
Large-Diameter Crucible
Big-bore crucibles for larger silicon charges and bigger crystal growth runs.
Large diameter / high volume
Custom Crucible
Crucibles built to your diameter, height, wall and shape, with optional lid or pour spout.
Built to spec · custom fabrication
How to Choose the Right Quartz Crucible
Crystal growth, solar or lab?
CZ silicon pulling needs a crucible matched to the puller and charge; solar polysilicon needs a PV-oriented crucible; analytical fusion and melting use smaller lab crucibles. The use case sets the size, shape and grade.
Shape, size and lid?
Pick cylindrical or conical, tall or low form to suit your furnace and charge volume, and add a lid where you need to limit evaporation or contamination. We make all of these to order.
Which grade for my melt?
Silicon growth and PV need the cleanest, lowest-metal material; general lab melting can use a standard grade. We carry several grades, so the exact one is confirmed with our team against your process — not chosen from a code on this page.
Not sure which to pick? Send us your furnace, charge material and dimensions and we will recommend the right crucible.
Applications of Quartz Crucible Products
Solar Photovoltaic
CZ and polysilicon crucibles for solar silicon crystal growth and PV processing.
Semiconductor Crystal Growth
CZ silicon-growth crucibles for monocrystalline silicon used in chip manufacturing.
Laboratory & Analysis
Fusion, ashing and melting crucibles for analytical chemistry and materials research.
High-Temperature Melting
Crucibles for melting glass, metals and other materials in high-temperature furnaces.
Crystal & Material Research
Specialty crucibles for crystal-growth experiments and new-material development.
Custom research crucibles
Optical Glass Melting
High-purity crucibles for melting optical glass and other contamination-sensitive materials.
Custom Quartz Crucible Fabrication
Send a drawing or a description of your furnace and charge and we will build the crucible to match. We accept DXF, STEP and IGES files and produce single-piece prototypes through to production runs.
sized to your puller or furnace
tall-form and low-form profiles
balanced for heat and strength
matched lids to reduce loss
spouts, rims and special shapes
for observation or heat retention
Specifications & Options
| Form | Cylindrical or conical; tall or low form |
| Appearance | Clear or opaque walls |
| Diameter & height | Small lab sizes to large crystal-growth crucibles |
| Wall thickness | Controlled to balance heat transfer and strength |
| Lid | Lidded or lidless / open top |
| Features | Optional pour spout, rim or custom profile |
| Grade | Matched to your melt & application, confirmed before production |
Dimensions and finish are made to order. We carry several material grades; the exact grade is recommended by our team based on your use case rather than ordered from a code, to avoid mismatches.
Quality Control & Why FGQuartz
Every quartz crucible goes through a strict in-house quality process, with inspection at each stage:
- Raw-material purity verification
- Diameter, height and wall measurement on every custom order
- Surface and visual quality check
- Thermal performance testing where specified
Backed by experience since 2005, in-house forming for bespoke orders, a stable high-purity material supply and worldwide shipping, FGQuartz serves solar, semiconductor, laboratory and industrial customers — from standard catalogue crucibles to one-off custom builds.
Quartz Crucible FAQ
Related Quartz Products
Browse the full quartz glass product range or see every quartz glass application.
Whether you need a CZ silicon-growth crucible, a solar quartz crucible, a laboratory fusion crucible or a fully custom vessel, FGQuartz is ready to quote. Tell us your furnace, charge and dimensions and we will match the right crucible for you.