Custom Quartz Crucibles

Quartz crucibles sized by capacity and wall geometry for melting, holding, or thermal processing — not just a generic cup shape.

Capacity isn't specified independently — it follows from OD/L×W, height, and wall thickness together, so send those dimensions rather than a target volume alone.

Wall, Bottom and Rim Design

Wall thickness affects both thermal shock resistance and how evenly heat reaches the contents — a thick wall resists cracking under rapid temperature change but responds more slowly to heating. Bottom geometry (flat, rounded, or conical) is chosen based on what's inside and how it needs to be removed or poured; a conical or rounded bottom often empties more completely than a flat one. Rim design — plain, rolled for strength, or shaped into a pouring lip — depends on how the crucible is handled.

Quartz Crucibles Size / Capacity / Joint Standard

Size is usually set by target capacity plus a margin for the material's expansion or foaming during heating — don't size a crucible to exactly your material volume. If your crucible needs a ground joint or lid to seal against contamination or atmosphere, tell us the joint standard your equipment uses. Fabrication is hot-formed from tube or plate stock, cut to height, and the rim fire-polished. Before shipment we check dimensions, wall thickness, bottom thickness, rim condition, and appearance (cracks, bubbles).

1.5–250 mLCapacity Series

12Reference Capacities

±5%Capacity Reference

ClearQuartz Option

OpaqueArc-Fused Option

LidOptional Form

Vessel Definition

Capacity, Wall Section and Bottom Geometry Control Crucible Selection

Controlled Feature	Reference Capability / Requirement
Capacity	1.5–250 mL reference series; custom size by drawing
Outside Diameter × Height	Finished envelope matched to furnace or sample holder
Wall Thickness	Specified separately from the bottom section
Bottom Thickness / Shape	Flat, rounded or reinforced according to heating and support
Rim	Plain, rolled, flanged or lid-matched
Material Form	Transparent fused quartz or opaque / milky arc-fused quartz where appropriate
Lid	Loose, fitted or handled lid defined with the body
Capacity Tolerance	±5% industry-reference level unless a calibrated volume is required

Reference Capacity Series

Choose the Smallest Vessel That Preserves Process Headspace

Series	Nominal Capacities	Configuration Notes
Micro	1.5 / 3 / 5 mL	Small analytical or sample-processing crucibles
Laboratory	10 / 15 / 20 / 25 / 30 mL	Clear or opaque, open or lidded
Medium	50 / 100 / 150 mL	Confirm wall, bottom and support geometry
Large	250 mL and custom	Confirm heating method and handling

Available Forms

Configurations Defined by the Process

Straight-Wall CrucibleCylindrical body with controlled rim and bottom

Tapered CrucibleReleased side wall for sample removal or process fit

Opaque CrucibleArc-fused milky quartz form where specified

Lidded CrucibleMatched cover and seating rim

Applications

High-Temperature Material Processing

Melting & SinteringCrucible geometry selected for charge volume and heating method

AshingSmall quartz vessels for analytical residue handling

Photovoltaic ProcessingTransparent or opaque quartz forms matched to the process

Laboratory HeatingOpen or lidded vessels for controlled sample treatment

Product Examples

Product Forms and Finished Components

Need a crucible matched to a furnace or sample volume?Send capacity, OD × height, wall and bottom thickness, material form, rim, lid and heating method.

Open the Product Configurator

Engineering Data

Grade-Qualified Material Purity

Electric-fused / flame-fused quartz: SiO₂ ≥99.99%; synthetic JGS1-grade fused silica: ≥99.999%. Grade and lot certificate govern supplied material.

Engineering Data

Arc-Fused Crucibles for Silicon Crystal Growth

Opaque arc-fused quartz crucibles for Czochralski silicon pulling are a separate 8–36 in product line from laboratory crucibles specified by volume. Transparent and translucent variants and custom shapes are supplied by application.

Size	OD (mm)	Height (mm)	T1 wall (mm)	T2 wall (mm)	T3 wall (mm)	R (mm)	r (mm)
8 in	203 ±3	153 ±3	5.5 ±1.5	5.5 ±1.5	5.5 ±1.5	305	60
10 in	254 ±3	178 ±3	6.0 ±1.5	6.0 ±1.5	6.0 ±1.5	305	70
12 in	305 ±3	228 ±3	6.5 ±1.5	6.5 ±1.5	6.5 ±1.5	305	80
14 in	355 ±3	254 ±3	7.5 ±1.5	7.5 ±1.5	7.5 ±1.5	400	90
16 in	404 ±3	280 ±3	8.5 ±1.5	8.5 ±1.5	8.5 ±1.5	400	90
18 in	457 ±3	320 ±3	8.5 ±1.5	8.5 ±1.5	8.5 ±1.5	500	120
20 in	508 ±4	381 ±3	10 ±3	10 ±3	10 ±3	510	90
22 in	558 ±4.5	381 ±3	11 ±3	11 ±3	11 ±3	558	130
24 in	607 ±4	435 ±4	12 ±2.5	13 ±2.5	12 ±2.5	610	125
28 in	710 ±4.5	516 ±4	13.5 ±5.5	13.5 ±5.5	13.5 ±5.5	710	120
32 in	809 ±5	500 ±4	16.5 ±5.5	16.5 ±5.5	16.5 ±5.5	813	160
36 in	910 ±5.5	500 ±4	16 ±6	20 ±6	17 ±6	914	180

T1, T2 and T3 are distinct wall measurement positions; R and r are curvature radii. The supplied drawing defines their locations and acceptance method. Nominal size is in inches; every table dimension is in mm.