Alumina Crucible

Purity: 95%, 96%, 99%, 99.5%, 99.7%, 99.95%

Custom sizes and standard sizes in stock
Quick Lead Time
Competitive Price

Alumina Crucible is a high-performance container primarily made of high-purity aluminum oxide (Al2O3) through high-temperature sintering. It is widely used in high-temprature sintering, melting experiments, and material analysis. As a leading supplier and manufacturer of premium alumina products, Shanghai Yuepeng utilizes advanced machining centers to produce high-quality alumina crucibles for a wide range of applications.

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Alumina Crucible Data Sheet

Reference Code:	HM1980
Purity:	95%, 96%, 99%, 99.5%, 99.7%, 99.95%
Shape:	Cylinder, Conical Cylinder, Rectangular, or customized according to specific drawings
Capacity:	5-1000 ml, or customized
Color:	White or Ivory
Density:	3.7-3.98 g/cm³

Alumina Crucible Description

Alumina Crucible is made primarily from high-purity aluminum oxide with rare additives, sintered at a high temperature of 1700℃ to get a completely dense product. They have excellent wear resistance, high-temperature stability, thermal shock resistance, chemical stability, and high hardness. It has a wide application due to its versatility and low material cost. Shanghai Yuepeng can supply customized solutions for shapes and dimensions to meet diverse industrial and research requirements.

Alumina Crucible Specifications

Advanced Ceramics Hub can offer high-precision alumina boats with various shapes and dimensions suitable for different applications, such as high-temperature experiments and material sintering. We can also provide customized services based on specific drawings to meet unique requirements. The regular specifications are as follows:

Conical Cylinder Shape Stock Dimensions

Capacity (ML)	Length (mm)	Width (mm)	Height (mm)
1	30	6	7
1	50	11	7
1.5	40	10	8
2.5	50	12	10
3	50	12	9
5	70	14	10
5	75	15	10
10	90	17	11.5
10	75	20	12
15	100	20	13
20	105	22	14.5
25	100	25	15
50	137	27	21
50	100	40	18
100	125	60	20
150	150	70	21
250	180	80	25
400	200	100	28
750	210	110	30

Cylinder Shape Stock Dimensions

Diameter (mm)	Height (mm)	Wall Thickness (mm)	Capacity (ml)
15	50	1.5	5
17	21	1.75	3.4
17	37	1	5.4
20	30	2	6
22	36	1.5	10.2
26	82	3	34
30	30	2	15
35	35	2	25
40	40	2	35
50	50	2	75
60	60	3	130
65	65	3	170
70	70	3	215
80	80	3	330
85	85	3	400
90	90	3	480
100	100	3.5	650
110	110	3.5	880
120	120	4	1140
130	130	4	1450
140	140	4	1850
150	150	4.5	2250
160	160	4.5	2250
170	170	4.5	3350
180	180	4.5	4000
200	200	5	5500
240	240	5	9700

Rectangular Shape Stock Dimensions

Length (mm)	Width (mm)	Height (mm)	Length (mm)	Width (mm)	Height (mm)
30	20	16	100	60	30
90	20	20	100	100	30
50	40	20	100	100	50
60	30	15	110	80	40
75	52	50	110	110	35
75	75	15	110	80	40
75	75	30	120	75	40
75	75	45	120	120	30
80	80	40	120	120	50
85	65	30	140	140	40
90	60	35	150	150	50
100	20	15	200	100	25
100	20	20	200	100	50
100	30	25	200	150	5
100	40	20

Alumina Crucible Advantages

High-temperature resistance: up to 1700℃
Excellent chemical stability: good corrosion resistance to most acids, bases, and molten substances
High hardness and wear resistance: ensuring a long service life
Good thermal stability and strong thermal shock resistance
High purity

Alumina Crucible Applications

High-Temperature Materials Processing: Alumina crucibles are widely used in metallurgy, ceramics, and materials research for melting, sintering, and calcination processes due to their excellent thermal stability.
Chemical Analysis and Testing: Their resistance to corrosion and chemical attack makes them reliable containers for sample preparation, fusion, and ash content determination in laboratories.
Crystal Growth: Alumina crucibles serve as containers in the production of single crystals and advanced materials, providing a stable and contamination-free environment.
Powder Metallurgy: They are used in the preparation and sintering of metal and ceramic powders, ensuring purity and consistency during high-temperature treatments.
Electronics and Semiconductor Processing: Alumina crucibles are employed in thin-film deposition, vaporization, and other semiconductor manufacturing steps where high purity and thermal endurance are required.

Chemical Analysis
High-Temperature Crucibles and Molds
Crystal growth
powder metallurgy
Optoelectronics

Alumina Material Properties

Material	Unit	95% Al2O3	96% Al2O3	99% Al2O3	99.5% Al2O3	99.7% Al2O3	99.95% Al2O3
Density	g/cm³	3.7	3.7	3.85	3.9	3.95	3.98
Bending Strength (20℃)	Mpa	300	300	330	360	380	500-600
Compressive Strength (20℃)	Mpa	2000	2000	2000	2350	2000	3500
Young’s Modulus (20℃)	Gpa	270	275	370	370	380	400
Fracture Toughness (20℃)	MPam^½	3.5	3.5	4	4	4	4.5
Poisson’s Ratio(20℃)	\	0.2	0.22	0.22	—	0.23	0.23
Mohs Hardness(20℃)	HRA	8.0-8.5	8.0-8.5	8.5-9.0	9.0	9.0-9.5	9.0-9.5
Vickers Hardness (HV1)	kg/mm²	1600	1600	1600	1650	1750	1800

Material	Unit	95% Al2O3	96% Al2O3	99% Al2O3	99.5% Al2O3	99.7% Al2O3	99.95% Al2O3
Thermal Expansion Coefficient (25-300 ℃）	10^-6K^-1	6.5	6.5	7.6	7.2	7.2	7.5
Thermal Conductivity (20℃)	W/mk	20	25	27.5	32	32	45
Thermal Shock Resistance	△T·℃	200	200	200	250	—	400
Specific Heat Capacity	J/g·k	—	—	0.79	0.78	0.79	0.80
Max Operating Temperature (Oxygen Condition)	℃	1600	1600	1650	1650	1700	1750

Material	Unit	95% Al2O3	96% Al2O3	99% Al2O3	99.5% Al2O3	99.7% Al2O3	99.95% Al2O3
Volume Resistivity (20℃)	Ω·cm	10¹⁴	10¹⁴	10¹⁴	10¹⁴	10¹⁴	10¹⁴
Dielectric Strength	KV/mm	10	10	10	15	15	16
Dielectric Constant (1 MHz, 25℃)	\	9	9	9.1	9.9	9.9	9.9
Dielectric Loss Tangent (1MHz, 20℃)	tanδ	3*10^-4	2*10^-4	3*10^-4	1*10^-4	1*10^-4	1*10^-4

Alumina Material Grades

It has a very high purity (99.95%) grade of Alumina (Aluminum Oxide) exhibiting an exceptional combination of mechanical and electrical properties. It features very high hardness, exceptional electrical resistivity, high-temperature mechanical stability and strength in addition to corrosion resistance and bio/chemical inertness.
Its high-temperature stability and electrical stability make it particularly suitable for high-temperature applications such as high voltage/frequency insulators, heating elements supports, etc

Physical Properties:

Color: White
Density: 3.98 g/cm³

Applications:

High-temperature electrical insulators
Very high voltage/frequency insulators
Machine components where high wear resistance
is required in an oxidizing environment
Precision shafts in high-wear condition
Unlubricated (vacuum) or gas/water lubricated
high speed sliding bearings
Shot blast nozzles
Abrasive flow deflector plates/cones
Valve seats
Wire guides

It’s a high-purity grade of Alumina (Aluminum Oxide) and one of the high-performance grades in this range of materials. It features a 99.7% purity Alumina base material that provides a superior set of mechanical and electrical properties while maintaining a reasonable cost. It is a very hard-wearing technical ceramic offering and is ideally suited to a wide range of industrial applications where mechanical and electrical performance is of the essence and the material needs to perform adequately in aggressive environments.
It can be machined in the “green state”- that is before sintering takes place, thus ensuring a large variety of shapes and sizes. It can also be diamond ground to tight tolerances in the fully sintered state using diamond grinding.

Physical Properties:

Color: Ivory
Density: 3.9 g/cm³

Applications:

Electronic components & substrates
High-temperature electrical insulators
High voltage insulators
Laser tubes
Machined components
Mechanical seals
Precision shafts and axles in high-wear environments
Roller and ball bearings
Seal rings

Semiconductor parts
Shot blast nozzles
Thermocouple tubes
Tap plates
Valve seats
Wear components
Wire and thread guides
Ballistic Armor

99.5% Purity Alumina is a high-performance engineering material with exceptional mechanical strength, high-temperature resistance, and excellent electrical insulation properties. It is widely used in industrial equipment, electronic components, medical devices, and aerospace applications.

Physical Properties:

Color: Ivory
Density: 3.9 g/cm³

Applications:

Electronic components & substrates
High-temperature electrical insulators
High voltage insulators
Laser tubes
Machined components
Mechanical seals
Precision shafts and axles in high-wear environments
Roller and ball bearings
Seal rings

Semiconductor parts
Shot blast nozzles
Thermocouple tubes
Tap plates
Valve seats
Wear components
Wire and thread guides
Ballistic Armor

99% Purity Alumina Is a premium industrial ceramic material with excellent mechanical properties, ultra-high hardness, high-temperature resistance, and insulation performance. It can maintain stable chemical and physical properties even in extreme environments, making it widely used in semiconductors, electronic components, laser technology, and aerospace.

Physical Properties:

Color: Ivory
Density: 3.85 g/cm³

Applications:

Electronic components & substrates
High-temperature electrical insulators
High voltage insulators
Laser tubes
Machined components
Mechanical seals
Precision shafts and axles in high-wear environments
Roller and ball bearings
Seal rings

Semiconductor parts
Shot blast nozzles
Thermocouple tubes
Tap plates
Valve seats
Wear components
Wire and thread guides
Ballistic Armor

It is a regular purity grade Alumina (Aluminum Oxide) and it is one of the workhorses of the technical ceramics industry. It features a 96% purity Alumina base material providing a balanced “cost to quality” ratio. It is a hard-wearing technical ceramic offering an excellent combination of both mechanical and electrical properties and is ideally suited to a wide range of industrial applications where cost is of the essence, but the material still needs to perform adequately from a mechanical and electrical standpoint.
It can be machined in the “green state”- that is before sintering takes place, thus ensuring a large variety of shapes and sizes. It can also be diamond ground to tight tolerances in the fully sintered state using diamond grinding.

Physical Properties:

Color: White
Density: 3.75 g/cm³

Applications:

Electronic components & substrates
High-temperature electrical insulators
High voltage insulators
Laser tubes
Machined components
Mechanical seals
Precision shafts and axles in high-wear environments
Roller and ball bearings
Seal rings

Semiconductor parts
Shot blast nozzles
Thermocouple tubes
Tap plates
Valve seats
Wear components
Wire and thread guides
Ballistic Armor

95% Purity Alumina is an economical and practical engineering material. Its slightly lower alumina content reduces production costs while maintaining decent wear resistance and processing flexibility. It is commonly used in mechanical parts, electrical insulators, and wear-resistant bushings, offering an excellent cost-performance balance.

Physical Properties:

Color: White
Density: 3.7 g/cm³

Applications:

Electronic components & substrates
High-temperature electrical insulators
High voltage insulators
Laser tubes
Machined components
Mechanical seals
Precision shafts and axles in high-wear environments
Roller and ball bearings
Seal rings

Semiconductor parts
Shot blast nozzles
Thermocouple tubes
Tap plates
Valve seats
Wear components
Wire and thread guides
Ballistic Armor

Alumina Ceramic Machining

Advanced ceramics are formed using methods such as injection molding, die pressing, isostatic pressing, slip casting, and extrusion. After sintering and densification, machining requires diamond grinding. Shanghai Yuepeng applies advanced green and biscuit machining to achieve complex shapes beyond traditional methods. Our machining center offers drilling, grinding, milling, polishing, sawing, tapping, threading, and turning, enabling the production of alumina ceramic components with high precision and complexity. During machining, the following precautions should be observed:

Shrinkage Control: Alumina ceramics shrink by about 20% during sintering, requiring dimensional adjustments in the green body stage.
Tolerance Control: Precise tolerances are unachievable in the green or pre-sintered state; fine machining should follow sintering.
Diamond Grinding: Post-sintering, high-hardness alumina requires diamond grinding, as conventional methods fall short.
Tool Selection: Diamond-coated tools or grinding wheels are essential to handle ceramic hardness and prevent tool damage.
Temperature Control: Strict temperature management during sintering prevents cracking or deformation.
Stress Management: Excessive stress during machining must be avoided to prevent brittle failure.
Cutting Speed and Feed Rate: Controlled speeds and feeds ensure quality and extend tool life.
Surface Treatment: Post-machining polishing removes defects, enhancing performance and appearance.

Alumina Ceramic Packaging

Alumina Ceramic products are typically packaged in vacuum-sealed bags to prevent moisture or contamination and wrapped with foam to cushion vibrations and impacts during transport, ensuring the quality of products in their original condition.

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To customize your alumina crucible, please provide the following details:

Dimensions: Top Diameter × Bottom Diameter × Height × Wall Thickness.
Shapes: Cylinder, Conical Cylinder, Rectangular, T-shape, or customized.
Purity of the material (95%, 96%, 99%, 99.7%, 99.95%, etc.)
Tolerances: Specify the required tolerances.
Surface Finishes: Polished, rough, etc.
Quantity of the crucibles you need
Alternatively, you can provide a drawing with your specifications.

Once we have these details, we can provide you with a quote within 24 hours.details, we can provide you with a quote within 24 hours.

We carry a wide variety of alumina products in stock, and for these, there is generally no minimum order requirement. However, for custom orders, we typically set a minimum order value of $200. The lead time for stock items is usually 1-2 weeks, while custom orders usually take 3-4 weeks, depending on the specifics of the order.

Alumina crucibles can generally withstand temperatures up to 1700–1800 °C, making them suitable for high-temperature melting, calcination, and sintering processes.

They offer excellent thermal stability, chemical resistance, and mechanical strength, ensuring minimal contamination and reliable performance under extreme conditions.

Shanghai Yuepeng Tech, established in 2022 in Shanghai, China, is a specialized supplier and manufacturer of alumina products. With extensive expertise in supply and export, we offer competitive pricing and customized solutions tailored to specific requirements, ensuring outstanding quality and customer satisfaction. As a professional provider of refractory metals, specialty alloys, spherical powders, and various advanced materials, we serve the research, development, and large-scale industrial production needs of the scientific and industrial sectors.

Alumina Crucible

Alumina Crucible

Alumina Crucible Data Sheet

Alumina Crucible Description