High-purity graphite is only as clean as its certificate — and a bad batch can wreck a sensitive process. Before you rely on a clean grade, verify it. This article covers four checks that confirm a high-purity graphite product really is clean.
Jiecheng Graphite (since 2003) supplies high-purity graphite to spec, and documents purity in writing.
Four checks that verify a clean grade
The certificate gives the ash and impurity limits. The grade matches the temperature and process. The batch data proves the specific lot. And the supplier's process controls keep the purity repeatable.
· Certificate — ash and impurity limits
· Grade — matched to the process
· Batch data — per-lot proof
· Process control — repeatable purity
Where high purity is required
High-purity graphite serves processes where contamination cannot be tolerated. Confirm the purity limit and temperature before ordering.
· Semiconductor and CVD duty
· High-temperature electronics
· Sensitive metallurgical processes
What to specify before you buy
Send the purity limit, temperature and process. Jiecheng Graphite supplies high-purity parts from its 3,000 m² Dalang plant and ships worldwide.
Check | What to confirm | Why it matters |
Certificate | Ash + impurities | Proves purity |
Grade | Process match | Sets resistance |
Batch | Lot data | Proves lot |
Control | Process | Keeps repeatable |
Buying checklist
1. Send purity limit and process
2. Request the certificate and batch data
3. Confirm grade for temperature
4. Agree repeat supply control
5. Freeze the purity spec
FAQ
What proves high purity?
The certificate and per-batch data showing ash and impurity limits.
How do I match the grade?
Base it on temperature and process, and confirm the limit.
Why per-batch data?
It proves the specific lot, not just the grade in general.
Verifying a clean grade
A clean grade is a claim until the data proves it. Ask for the certificate and the batch data before the part reaches your process. Jiecheng Graphite documents ash and impurity limits on every high-purity part, so you can verify the lot, not just the name.
· Request the certificate and batch data
· Confirm the purity limit value
· Keep the purity record on file
A clean grade is verified by certificate, batch data, grade match and process control. Jiecheng Graphite has supplied high-purity products since 2003 and keeps the purity spec on file.
