Overview of Corundum Crucible

Corundum crucibles, made from alumina (Al₂O₃), are highly valued for their exceptional thermal resistance and chemical stability. These crucibles are ideal for high-temperature applications, such as melting and annealing processes in laboratories and industrial settings. Corundum crucibles can withstand temperatures up to 1800°C and are resistant to most chemical reagents, making them indispensable in various scientific and manufacturing operations.

Features of Corundum Crucible

High Thermal Resistance: Can withstand temperatures up to 1800°C without degrading.

Chemical Stability: Resistant to most acids and alkalis, ensuring minimal contamination during experiments or production.

Durability: Extremely durable and long-lasting, even under harsh conditions.

Non-Reactive: Does not react with the materials being processed, preserving sample purity.

Versatility: Suitable for a wide range of applications including melting metals, glass, and ceramics.

Precision Engineering: Manufactured to tight tolerances for consistent performance and reliability.

(Graphite crucible for vacuum deposition)

Specification of Graphite crucible for vacuum deposition

Graphite crucibles hold materials during vacuum deposition. Vacuum deposition coats objects with thin films. The process happens inside a vacuum chamber. High temperatures melt the source material inside the crucible. Graphite handles these extreme conditions well. It withstands intense heat without breaking down. Graphite also resists chemical reactions with many materials. This is crucial for coating purity.

These crucibles come in different sizes and shapes. The size matches the deposition machine and the coating job. Common shapes include cylindrical or conical designs. Shape affects how the material melts and vaporizes. A good shape ensures even coating. The graphite must be very pure. Impurities can ruin the coating layer. High-purity graphite minimizes contamination risks.

The crucible needs excellent thermal conductivity. Graphite heats up quickly and evenly. This allows for efficient melting of the source material. Consistent heat leads to a stable vapor stream. A stable vapor stream creates uniform coatings. Graphite crucibles also cool down relatively fast. Faster cooling means quicker turnaround times between coating jobs.

Graphite lasts a long time under vacuum. It doesn’t warp easily at high temperatures. This durability saves money over time. Crucible walls must be thick enough. Thick walls prevent cracking under thermal stress. Yet, the crucible shouldn’t be too heavy. Proper weight ensures easy handling and machine compatibility. These crucibles work with metals like gold, silver, or aluminum. They also handle various compounds used for optical or electronic coatings. Choosing the right crucible size and purity is vital for successful coating results.

(Graphite crucible for vacuum deposition)

Applications of Graphite crucible for vacuum deposition

Vacuum deposition needs special equipment. Crucibles hold the materials being evaporated. Graphite crucibles work very well for this. They handle the extreme conditions needed.

Graphite gets very hot without melting. This is vital for vaporizing metals and ceramics. It stays stable under high temperatures. Crucibles must not crack or deform easily. Graphite is strong even when hot. This reliability matters a lot.

Purity is another key point. Graphite crucibles are very pure. They don’t add unwanted stuff to the vapor. Contamination ruins thin film quality. Clean vapor makes better coatings. Graphite helps keep things clean.

Machining graphite is straightforward. You can shape it into precise crucible forms. This ensures good fit and function inside the chamber. Consistent shape helps control the evaporation process. It leads to uniform film deposition.

Graphite crucibles resist chemical attack. Many evaporated materials are reactive. Graphite doesn’t react with most of them. This extends the crucible’s life. You get more use before replacement is needed.

These crucibles work for many materials. They evaporate aluminum well for mirror coatings. Gold and silver coatings also use graphite crucibles. Some ceramics vaporize effectively using graphite. It’s a versatile tool.

Long service life is a big advantage. Graphite lasts through many heating cycles. This reduces downtime and costs. Operators appreciate the durability. It makes production smoother.

Thermal conductivity is important too. Graphite heats up quickly and evenly. This promotes efficient evaporation. Consistent vapor flow results. It helps achieve the desired film properties.

Company Introduction

Welcome to Teen-Hot,a leading global supplier of high-quality crucibles designed for various industrial applications. We offer an extensive range of crucibles, including graphite, ceramic, and metal varieties, tailored to meet the needs of foundries, laboratories, and manufacturers. Our products are renowned for their durability, thermal resistance, and precision engineering, ensuring optimal performance in melting and heat treatment processes. With advanced manufacturing facilities and a commitment to excellence, we provide reliable, cost-effective solutions worldwide. Partner with us for your crucible needs and experience superior quality, expert support, and timely delivery.

If you have any questions, please feel free to contact us(nanotrun@yahoo.com).

Payment Methods

T/T, Western Union, Paypal, Credit Card etc.

Shipment Methods

By air, by sea, by express, as customers request.

5 FAQs of Graphite crucible for vacuum deposition

What does a graphite crucible do in vacuum deposition?
It holds the material you want to evaporate. The vacuum chamber gets very hot. This heat makes the material inside the crucible turn into vapor. The vapor then sticks to your target object, creating a thin coating. The crucible is essential for this process.

Why is graphite used for these crucibles?
Graphite handles the extreme heat well. It doesn’t easily melt or crack under high temperatures. Graphite also resists chemical reactions with many evaporating materials. This keeps your coating pure. It’s a reliable material for tough vacuum conditions.

How hot can graphite crucibles get?
They manage very high temperatures. Most graphite crucibles work fine above 2000 degrees Celsius. Some special grades handle even more heat. This high heat tolerance lets you evaporate metals and ceramics needing strong heat. Check the specific crucible’s rating for your needs.

How long will a graphite crucible last?
It depends on your usage. How hot you run it matters. The material you evaporate inside affects it too. Crucibles used gently last longer. Crucibles under heavy stress wear out faster. You need to watch for signs like cracking or flaking. Replace it when performance drops.

What sizes and shapes are available?
Crucibles come in many options. You find common shapes like cylinders, cones, or boats. Sizes vary from small to large. They fit different vacuum chamber setups. Pick the shape and size that matches your material and equipment best. Suppliers offer many standard designs.

(Graphite crucible for vacuum deposition)