Chemically Stable Graphite Crucible Protected by Ceramic Shield for Precious Metal Melting

Product Description

Product Description

Ultra-High Purity Graphite Crucibles: Precision & Performance for Demanding Applications

Engineered for Excellence, Built to Endure

Our Ultra-High Purity Graphite Crucibles represent the pinnacle of thermal processing materials. Crafted from premium-grade, fine-grained graphite with a purity exceeding 99.99%, they deliver unmatched performance in high-temperature and chemically aggressive environments. Ideal for metal melting, crystal growth, semiconductor processing, and advanced laboratory research.

Specification

Key Features & Benefits

Exceptional Thermal Properties:  Withstands extreme temperatures up to 3000°C in inert/vacuum atmospheres. Features excellent thermal conductivity for rapid, uniform heating and superior thermal shock resistance.

Precision Machining:Available in custom sizes and shapes with smooth, machine-finished surfaces for consistent performance and easy handling.

Ultra-High Purity & Density:Manufactured using high-isostatic pressing (HIP) or vibration molding, ensuring minimal porosity, high density (>1.80 g/cm³), and extremely low ash content (<20 ppm). This minimizes contamination for sensitive melts.

Superior Chemical Inertness: Highly resistant to most acids, alkalis, and molten salts. Provides excellent stability and a long service life when processing reactive or high-purity materials.

Mechanical Strength:  Maintains excellent structural integrity and creep resistance under high thermal and mechanical loads.

Applications And Product Usage:

Metal & Alloy Processing: Melting, casting, and purification of precious metals (Au, Ag, Pt), rare earth metals, and specialty alloys.

Semiconductor & PV Industry: Czochralski (CZ) and Bridgman crystal growth of silicon and other compounds.

Chemical Vapor Deposition (CVD): Susceptors and crucibles for epitaxial growth.

Spectroscopy & Analysis: Sample holders and combustion boats for AA, ICP, and elemental analysis.
Laboratory & R&D: High-temperature sintering, heat treatment, and synthesis of advanced materials.
Glass & Quartz Processing: Molds and containers.

Item	Unit	Guarantee value
Bulk Density	g/cm³	1.78 - 1.88
Maximum Operating Temp (Inert/Vacuum)	℃	2500°C - 3000°C
Flexural Strength	Mpa	35 - 70 MPa
Compressive Strength	Mpa	70 - 130 MPa
Termal Conductivity	W//mk	80 - 120 W/m·K
Ash Content	%	< 20 ppm (typically < 10 ppm)
Physical And Chemical Index

Drawings & Dimensions

Dimensions & Geometry: Custom OD, ID, height, and wall thickness. Cylindrical, conical, rectangular, and special shapes.
Surface Finish: Standard machined, high-gloss polished, or specialty coatings (e.g., anti-oxidation ceramic coatings).
Impregnation: Vacuum-impregnated with oxidation-resistant agents for extended use in air.

More sizes Welcome to click the Chat/Contact Supplier Button to contact our sales manager.

Company Profile

Qingdao TTWY International Trade Co., Ltd

Our company specialized in producing casting equipment. It is located in Qingdao,a beautiful harbor city,which is convenient in transportation. Especially in Refractory products, for expamle, the Quartz Crucible,Graphite crucible,Fire Assay Clay Crucible,Mullite Ceramic Crucible,Zirconia/Alumina(Al2O3) Ceramic Crucible , etc;

With high quality,reasonable price and attentive service the products produced by TTWY have wined trust from clients at home and aboard.

Packaging & Shipping

FAQ

Q1: What information should I let you know if i want to get a quotation?
A: The required material dimension (Thickness*Width*Length,diameter*length; if possible, please kindly supply us drawings).
The required more information, such as Surface Condition, Tolerance Request, The Quantity, and other mechanical and technical details.
     
If it is possible, please also provide the application of products, we will recommend the most suitable products with details for confirmation.
 
Q2: How do you gurantee the quality of the products?
A: Each step of production and finished products will be carried out inspection by QC department before storing in the warehouse. NG goods are not allowed in the completed goods warehouse.
 
Q3: Can you guarantee the prompt delivery?
A: Yes, when we get your inquiries, not only we will evaluate the more competitive price, but also we can get the most reasonable delivery time. So the prompt delivery can be guaranteed.
 
Q4: What is your lead time? 
A : It usually needs about 15- 20 days after receiving the PO. 
 
Q5 : What is your payments terms?
A : T/T, L/C, Western Union, etc., could be acceptable. 
 
Q6 : Can we visit your company?
A : Yes, for sure, It's my pleasure to visit our company.
 
Q7 : What is the shipping cost?
A: The shipping cost is determined by the destination port, weight, packing size, total CBM of the products, we will try best to get the most reasonable shipping cost from the forwarders or express couriers to help you save more money.
 
Q8 :What is the transportation way?
A:If the Gross Weight ≤45kg, it's better by express such as TNT, DHL, FedEx,, etc. 
If the Gross Weight between 45kg to 100kg, by express or by air to your nearest airport can be both considered.
If the Gross Weight ≥ 100kg ,you can choose by Air or Sea to the nearest port.
 
Q9 :How service you can offer your clients? 
A:We provide presales service in various forms, for example, making investment budget,manufacturing planning,etc.so that customer make a reasonable plan with less cost. Moreover,we will also provide after sale service ,for example,free training about machine applications ect. 

Update Date:2026/01/28