Hebei Corefra Silicon Nitride Material
河北高富氮化硅材料有限公司
Hebei maker of silicon nitride powder and ceramics. Its CF-SN powder forms the release coating inside quartz crucibles for multicrystalline silicon casting and comes with a published chemistry and particle-size table.
Supplier at a glance
- Location
- Xingtai, Hebei
- Equipment listed here
- Crucible coating materials
- Solar product
- CF-SN silicon nitride powder for the release coating on quartz crucibles in multicrystalline ingot casting. [2]
- Founded
- 2011, as given in the company introduction. [1]
- Profile sources
- 5 named sources; source list
Company scope
What the company makes
Corefra is the English name of 河北高富氮化硅材料有限公司, a Hebei maker of silicon nitride powder and ceramics that gives 2011 as its founding year. Solar buyers come to it for one product: CF-SN, a silicon nitride powder sprayed onto the inside of high-purity quartz crucibles to form a release coating for multicrystalline silicon ingot casting.
The Chinese CF-SN page carries a specification table with a test method on every line. Nitrogen is above 39%, oxygen at most 1.0% and carbon at most 0.2%. Iron, aluminium, calcium, manganese and copper are held to 5 ppm or less each. The median particle size, D50, is 2 µm. Together these give a buyer a clear basis for incoming lot checks. The table covers the powder only. Alpha-phase content, the full size distribution, a slurry formula, coating thickness and a furnace schedule come from Corefra's application guidance and your own casting trial.
Corefra's English site presents high-purity silicon nitride powder more broadly, as a raw material for sintered ceramics used across several industries. The company also makes substrates, bearing balls and other ceramic parts. CF-SN is the grade with a stated casting role, so name it in your enquiry. The company introduction describes production capacity and management-system certificates; ask for the current documents for the site that will make your powder.
The national standards database names the company as a drafter of GB/T 45767-2025, the standard for silicon nitride ceramic substrates, in effect since 2026-01-01. That places Corefra in standards work for sintered substrates. For a CF-SN order, the practical package is the current grade specification, lot certificates with traceable lot numbers, dispersion and coating guidance, and a controlled casting trial on your own crucibles.
Equipment portfolio
Start with the actual equipment
The entries below cover selected products and series from this manufacturer. Ask for the full catalogue if your project needs other models.
Corefra CF-SN silicon nitride crucible-coating powder →
CF-SN is Corefra's silicon nitride powder for the release coating sprayed inside quartz crucibles in multicrystalline silicon ingot casting. The sheet gives N >39%, O ≤1.0%, C ≤0.2%, Fe, Al, Ca, Mn and Cu at ≤5 ppm each and a D50 of… [2]
Specifications & selection questions →How CF-SN is used
From CF-SN powder to a cast ingot
Accept the powder
CF-SN comes with a published chemistry, impurity and median-size table. Agree the current specification revision and a lot sampling plan so every delivery is checked against the same numbers. [2]
Prepare the slurry
Corefra describes CF-SN as a sprayed crucible coating, and the product page stops short of a slurry recipe. Ask for its dispersion instructions, the liquids and binders it approves and the solids content it recommends. [2]
Coat the crucible
Share the crucible you use and the spray equipment you plan to run. Settle adhesion, coverage, thickness, drying and inspection criteria that suit your casting process. [2]
Cast and judge
Run a controlled casting trial and judge it on release, contamination and ingot quality. Furnace yield and ingot cleanliness are decided here, so fix the acceptance limits before the trial starts. [2]
Which grade to quote
Which Corefra products suit solar casting
CF-SN for multicrystalline casting
The Chinese product page names CF-SN as the release agent for the inner surface of quartz crucibles in multicrystalline ingot casting. For monocrystalline pulling, ask Corefra whether it offers a grade and what data supports it. [2]
High-purity powder on the English site
The English page presents high-purity silicon nitride powder as a raw material for sintered ceramics and mentions new-energy uses in general terms. For a solar order, name CF-SN and its specification. [3]
Published specification
CF-SN chemistry, particle size and test methods
| Entry | Limit or value | Test method |
|---|---|---|
| N | >39% | Kjeldahl nitrogen; GB/T 16555-2017. |
| O / C | ≤1.0% / ≤0.2% | Inert-gas pulse infrared / high-frequency infrared; GB/T 16555-2017. |
| Fe, Al, Ca, Mn, Cu | ≤5 ppm each | ICP-MS; GB/T 30902-2014. |
| D50 | 2 µm | Laser particle-size analysis; GB/T 19077-2016. |
The table gives no D50 tolerance, full size distribution or phase-content limit. These are Corefra's published limits; request measured lot results for your order. [2]
Background
Corefra as a company and supplier
Drafter of GB/T 45767-2025
The national standards database lists 河北高富氮化硅材料有限公司 among the drafters of GB/T 45767-2025 for silicon nitride ceramic substrates, effective 2026-01-01. Substrates are a sintered product, while CF-SN is a loose powder with its own specification. [5]
Production and certificates
Corefra's introduction describes powder and ceramics production and lists management-system certifications. Request the current certificates for the producing site and the capacity Corefra can commit to CF-SN for your volume. [1]
Contact channel
Corefra's English contact page gives the official company name and a company mailbox. Use it to reach the factory, then check the legal entity, producing site and bank details on the contract and invoice. [4]
Project fit
Match the offering to your project
Casting-material teams looking for a silicon nitride release-coating powder with a published specification.
Buyers setting lot chemistry, impurity and particle-size acceptance for crucible coatings.
Engineers planning a slurry, coating and crucible trial ahead of production casting.
Confirm before ordering
- The full CF-SN particle-size distribution, D50 tolerance, phase content and specific surface area.
- Slurry formulation, coating thickness, drying and furnace conditions Corefra recommends for your crucible.
- Current CF-SN capacity, the producing site and the scope of each certificate.
Facts come from Corefra's own Chinese and English pages (company, products, contact) plus one national standards record; each source shows its check date.
Certificates & approvals
Approvals on file
No factory audit or equipment certificate is on file for this manufacturer yet. Ask for current certificates, with their scope and validity, in your quotation request.
Prepare before contacting
Your Corefra CF-SN silicon nitride crucible-coating powder enquiry checklist
Tick the questions that apply to your project, then take them into your sourcing request. Ticking an item here does not contact the manufacturer.
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Continue to sourcing requestBuyer questions
Does CF-SN come with a coating recipe?
The product page describes the spray-coating use without a slurry formula or coating procedure. Ask Corefra for its instructions and trial them on your own crucibles. [2]
Is the 2 µm D50 the largest particle size?
D50 is the median of the size distribution, so coarser particles are present. Ask for the full distribution and the tolerance Corefra will hold on each lot. [2]
Sources
Where this information comes from
CF-SN has a stated multicrystalline casting use and a published table; ask Corefra for the producing site and coating guidance before ordering.
Company facts come from the publications listed below, each with the date it was checked. The project-fit notes and enquiry checklist are our buying guidance.
- Company introduction ↗Manufacturer page (Chinese) · Checked Read 2026-10-11
Founding year, powder and ceramics business, stated capacity and certificates.
- CF-SN product page and specification table ↗Manufacturer page with specification image · Checked Read 2026-10-11
Casting use, chemical limits, D50 and test methods.
- High-purity silicon nitride powder (English) ↗Manufacturer page (English) · Checked Read 2026-10-11
Powder as a raw material for sintered ceramics in several industries.
- Corporate contact ↗Manufacturer page (English) · Checked Read 2026-10-11
Official company name and contact channel.
- GB/T 45767-2025 ↗National standards database · Checked Read 2026-10-11
Silicon nitride ceramic substrate standard and its drafting companies.
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