Application Guide
How to Select the Right Quartz Crucible for Semiconductor and Solar Applications
Learn how to choose quartz crucibles for CZ crystal growth, solar ingot casting, and laboratory use.
## Overview
Quartz crucibles are a critical consumable in semiconductor and photovoltaic manufacturing. This guide covers key selection criteria for purity grades, sizing, process compatibility, and supplier evaluation.
## Crucible types by application
- **CZ crucibles**: Single-crystal silicon growth, ≥99.998% purity, 8"–32" diameter
- **Solar crucibles**: Polycrystalline silicon casting, square format, ≥99.99% purity
- **Laboratory crucibles**: Chemical analysis, 2"–6" diameter, ≥99.9% purity
## Purity grade selection
| Grade | SiO₂ Purity | Application |
|-------|------------|-------------|
| Standard lab | ≥99.9% | Chemical analysis |
| Solar casting | ≥99.99% | PV ingots |
| Semiconductor CZ | ≥99.998% | IC-grade wafers |
## Supplier evaluation criteria
1. Raw material traceability
2. Manufacturing process quality
3. Quality control documentation (TDS, COA)
4. Dimensional consistency
5. Packaging for international shipping
## What buyers should clarify
Application type, inner diameter, wall thickness, purity grade, bubble class, and expected consumption volume.