Product Details
1. Overview of Mgo Ceramic Crucibles
1.1 Definition and Basic Features
Magnesia ceramic crucibles, also known as high-purity MgO melting crucibles, are ultra-high temperature refractory crucibles manufactured from high-purity magnesia powder via isostatic pressing and ultra-high temperature solid-state sintering. Widely adopted for melting, calcination and thermal treatment inside vacuum furnaces, induction furnaces and muffle furnaces, they can withstand extreme ultra-high thermal environments while maintaining stable physical properties and excellent chemical inertness against alkaline molten media.
As high-performance refractory ceramic vessels, they feature unique alkaline corrosion resistance and ultra-high temperature resistance unmatched by alumina crucibles. They act as core consumables for high-temperature induction melting, vacuum sintering and alkaline thermal analysis experiments.
1.2 Classification and Grade Standards
Based on magnesia purity and sintering density, magnesia ceramic crucibles are supplied in mainstream high-purity grade to satisfy ultra-high temperature alkaline experiment and industrial heating demands:
99.8% high-purity magnesia grade contains 99.8% MgO with ultra-low impurity content and strictly controlled volatile oxide residues. It is specially developed for ultra-high temperature alkaline environments, rare earth material thermal treatment and high-alkali atmosphere melting, preventing chemical reactions and sample contamination when contacting alkaline melts or alkaline atmosphere.
2. Core Characteristics of Mgo Ceramic Crucibles
2.1 Physical Properties
The core physical advantage of premium magnesia ceramic crucibles lies in high sintered density and compact grain structure. After high-temperature densification sintering, the blank forms a tight non-porous body, effectively blocking penetration and leakage of alkaline molten metal and oxide slag under long-time ultra-high temperature working state.
It owns balanced flexural, compressive and fracture strength, maintaining stable dimensional rigidity under static load at extreme high temperature without softening or permanent deformation. Inner and outer surfaces can be precision machined to customer requirements, easy to assemble and maintain for repeated high-temperature operating cycles.
2.2 Chemical Properties
The primary chemical component is high-purity magnesia (MgO), with only trace impurity oxides inside. It exhibits outstanding chemical inertness against all kinds of alkaline molten materials, alkaline earth metals and alkaline slag, barely generating chemical dissolution or ion exchange. It will not contaminate alkaline test samples or high-purity raw materials during heating, fully guaranteeing data accuracy of alkali metal quantitative analysis and purity of sintered materials.
Limitation note: Magnesia shows weak resistance to strong acid and hydrofluoric acid. Long-term melting of acidic samples is not recommended.
2.3 Thermal Performance
Magnesia ceramic crucibles have industry-leading ultra-high temperature resistance. Its continuous stable long-term working temperature reaches 2400°C, far exceeding alumina ceramic crucibles. It can withstand intermittent peak heating cycles up to 2400°C. It features moderate thermal conductivity of 15.9–42 W/m·K, uniform heat transfer inside the cavity to avoid local overheating of samples.
With a moderate linear thermal expansion coefficient of 8.6×10⁻⁶ /°C (40–250°C), it delivers reliable thermal shock resistance and is not prone to cracking under reasonable rapid heating & cooling cycles, matching the temperature curve of vacuum ultra-high temperature furnaces.
3.Advantages of Mgo Ceramic Crucibles
3.1 Unmatched Ultra-High Temperature Structural Stability
Different from alumina, quartz or ordinary porcelain crucibles, magnesia ceramic crucibles keep complete structural rigidity at temperatures above 1800°C, no softening, deformation or adhesion with alkaline sintered materials. It supports uninterrupted long-cycle ultra-high temperature alkaline thermal treatment and ensures stable performance in long-term batch melting operation.
3.2 Zero Contamination for High-Purity Alkaline Materials
Thanks to 99.8% high-purity magnesia raw material and fully dense sintered structure, it barely releases impurity ions when contacting alkaline melts or high-temperature alkaline atmosphere. It is the reliable insulating choice for trace alkaline element analysis, rare earth/alkali metal melting equipment and high-purity alkaline material sintering, fully satisfying strict purity and precision requirements of professional labs and advanced thermal processing equipment.
3.3 Long Service Life & High Cost Efficiency
Equipped with balanced thermal shock resistance and exclusive alkaline corrosion resistance, the crucible can be reused dozens of times under standardized alkaline melting operation. Compared with easily-corroded alumina crucibles used in alkali environments, it extends service cycle significantly, cuts long-term operating consumable cost for furnaces, and is an economical refractory vessel for batch ultra-high temperature alkaline processes.
3.4 Wide Compatibility & Flexible Customization
Custom CNC machining is available according to customer drawings: customizable inner diameter, height, wall thickness, bottom profile, special grooves and irregular outlines.
It is fully compatible with vacuum high-temperature furnaces, induction melting furnaces, alkaline muffle furnaces and thermal analysis instruments, widely applied in alkali metal oxide sintering, rare earth metallurgy, high-alkali sample ashing, high-purity powder calcination and precious alkaline raw material refining.
Product Parameter Table
|
性能
Item
|
单位
Unit
|
数值
Data
|
|
成分
Content
|
% |
99.8 |
|
密度
Density
|
g/cm3 |
3.56 |
|
硬度
Hardness
|
Mohs' |
6 |
|
线热膨胀
Liner Thermal Expansion
|
/oC
(40o to 250o)
|
8.6x10-6 |
|
工作温度
Work Temperature
|
oC |
2400 |
|
抗弯强度
Flexual Strength
|
MPa |
84 |
|
抗压强度
Compressure Strength
|
MPa |
14 |
|
断裂强度
Fracture Strength (5 distance)
|
MPa |
125 |
|
热导率
Thermal Conductivity
|
W/m.k |
15.9-42 |
|
体积电阻率
Volume Resistivity(100oC)
|
|
>1012 |
|
介电常数
Dielectric Constant 1.0MHz
|
---- |
5.8 |
Development History
Patents and Certification
We’ve obtained various global certifications including CE, EMC, LVD, RoHS, FDA, MSDS, ISO 9001, SGS and TUV. We also own eight registered trademarks and forty technical patents to support independent R&D.
Our proprietary core technologies run through all product lines: porous ceramics, industrial ceramic components, special glass, metallized ceramics, liquid absorption cotton, ozone generators and silicone goods. All products are manufactured in strict accordance with international quality standards, delivering reliable and high-performance solutions that have gained wide recognition and market trust worldwide.
Package
We adopt scientific and standardized packaging solutions tailored to product characteristics to effectively prevent collision, extrusion, dust and moisture damage. With mature global transportation system and strict shipment inspection procedures, we ensure all products remain intact and stable during long-distance delivery, providing customers with safe, efficient and reliable one-stop logistics service.
Services
inquiry & Customization
We provide fast and accurate quotation response for all your inquiries. Flexible OEM & ODM customization solutions are available to meet your unique product design, packaging and branding requirements.
Order Quality Control
We keep clients updated with full production progress throughout the whole order cycle. Our QC team carries out strict comprehensive pre-shipment inspection to guarantee all goods comply with your quality standards before delivery.
Customs Document Support
We prepare a full set of standard export documents including commercial invoice, packing list, certificate of origin and other certification papers, to ensure smooth global customs clearance for shipments to all destinations worldwide.
One-Stop Logistics
Multiple shipping methods including sea freight, air freight and express delivery are offered to match your schedule and budget. We supply real-time cargo tracking service so you can monitor shipment status anytime.
Flexible Payment
We support a wide range of secure international payment terms such as T/T, L/C, Western Union and other mainstream cross-border settlement methods to reduce your cross-border transaction risks.
After-Sales Support
Our professional after-sales team offers timely technical and business support all year round. We maintain steady long-term stable supply capacity to fully back up your continuous market sales and project demands.
FAQ
01
Question: Can you produce based on customers’ drawings or physical samples?
Answer: Absolutely yes. We accept technical drawings in all mainstream file formats as well as actual physical samples. Before formal production, our engineering team will provide a full professional DFM feasibility evaluation for your reference.
02
Question: How long is the production lead time for custom orders?
Answer: Sample lead time: 3–7 working days. Custom mold lead time: 5–10 working days (we will confirm the cycle separately with you for complex molds). Mass production lead time: 7–20 working days, depending on product structure complexity and order quantity.
03
Question: What’s your minimum order quantity for custom products?
Answer: We provide flexible MOQ solutions for all customized items. We will try our best to set a low minimum order volume to support your small-batch trial orders, meanwhile we can handle stable mass production to satisfy your long-term bulk demands.
04
Question: What customization services can you provide?
Answer: We support comprehensive one-stop customization, including product size, shape, appearance, precision tolerance, surface treatment, hole grooving, bending, cutting and adjustable high-temperature resistant parameters. Custom engraved LOGO and exclusive customized packaging are also available as extra personalized options upon request.
05
Question: Do you accept third-party inspection of finished products?
Answer: Yes, we fully cooperate with all mainstream authorized third-party testing institutions. Well-known organizations such as SGS, BV and other internationally recognized inspection bodies are all acceptable. We can supply complete official inspection reports and material certification documents as you require.
06
Question: Can you customize raw material options for products?
Answer: Sure. We can select and match appropriate raw materials according to your application scenarios, working conditions and performance requirements, including alumina, zirconia, quartz, silicone and other special engineering materials, and adjust related performance parameters to meet your usage standards.
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