Alumina Boat

Alumina Boat HM

Alumina Boat

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

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

  • Alumina Boat 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, we can supply high-quality alumina boats with various specifications and competitive prices, offering customized solutions to meet specific requirements.
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Alumina Boat Data Sheet

Reference Code:

HM1981

Purity:

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

Shape:

Rectangle, Boat

Color:

White or Ivory

Density:

3.7-3.98 g/cm3

Alumina Boat

Alumina Boat is made primarily from high-purity aluminum oxide with rare additives, sintered at a high temperature of 1700℃ to get the 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. Advanced Ceramics Hub can supply customized solutions for shapes and dimensions to meet diverse industrial and research requirements.

  • Alumina Boat HM 1

Alumina Boat 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:

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

Alumina Boat Advantages

  • High-Temperature Resistance: Alumina boat withstands up to 1700°C, ideal for extreme conditions.
  • Chemical Stability: The alumina boat resists acids, bases, and molten substances.
  • Thermal Shock Resistance: The alumina boat can tolerate rapid temperature changes without cracking.
  • High Purity: The alumina boat minimizes sample contamination, perfect for precision experiments.
  • Durability: The alumina boat has high hardness and wear resistance to ensure a long service life.

Alumina Boat Applications

  • High-Temperature Sintering: Used in sintering ceramics, metal powders, or composite materials.
  • Heat Treatment: For annealing or heat-treating samples in labs or industries.
  • Material Testing: To test melting points, heat resistance, or chemical stability of materials.
  • Chemical Reactions: Serves as a container for substances in high-temperature chemical experiments.
  • Electronics Industry: Applied in thermal processing and deposition of semiconductors or thin films.
  • Electric and Electrical Equipments HM 1
    Electrical and Electronic Area
  • High temperature Lab HM
    High-temperature Lab
  • High temperatuer furnaces applications HM 1
    High-temperature Furnaces
  • Aerospace Applications HM 1
    Aerospace

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℃)

MPam½

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

Boron Nitride, with a glassy B2O3 binder, is highly machinable and suitable for most refractory applications. Grade A, used for over 50 years in legacy semiconductor and defense equipment, can produce components up to 410mm x 495mm x 245mm, but its hygroscopic binder needs moisture protection.

Grade A Composition:

  • hBN>99.8%
Grade A Applications:
  • High-temperature electrical insulators and vacuum furnace supports with electrical resistivity, strength, and thermal shock resistance.
  • Crucibles and containers for high-purity molten metals.
  • Insulators and fixtures for ion implantation systems requiring high temperature purity and electrical insulation.
  • Radar components and antenna windows needing precise electrical and thermal properties.
  • Setter plates for processing advanced materials requiring stable, inert surfaces.
  • Nozzles for powdered metal spraying.

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

CNC Machining For Ceramics HM
CNC Machining For Ceramics HM 2

Alumina ceramics are produced through methods such as injection molding, die pressing, isostatic pressing, slip casting, and extrusion. After sintering and densification, machining requires diamond grinding techniques. Advanced Ceramic Hub utilizes cutting-edge green and biscuit machining technology to produce more complex components with traditional methods. Our advanced machining center includes drilling, grinding, milling, polishing, sawing, tapping, threading, and turning, enabling the manufacture of alumina ceramic components with tight tolerances and high complexity. During the machining process, 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.

ceramic products packing HM

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We will check and get back to you in 24 hours

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

  1. Dimensions: Length × Width × Height.
  2. Shapes: Rectangle, Boat, or customized.
  3. Purity of the material (95%, 96%, 99%, 99.7%, 99.95%, etc.)
  4. Tolerances: Specify the required tolerances.
  5. Surface Finishes: Polished, rough, etc.
  6. Quantity of the boats you need
  7. Alternatively, you can provide a drawing with your specifications.

Once we have these 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 ceramics is a high-performance ceramic material composed of alumina with a purity ranging from 90%~99.9%. It has excellent heat resistance, corrosion resistance, and high hardness, commonly used in industrial components, electronic substrates, and medical devices.

Alumina ceramics offers advantages including high strength, wear resistance, high-temperature tolerance (up to 1700 ℃), excellent electrical insulation, and chemical stability, performing exceptionally in harsh conditions.

Alumina boats are widely used in high-temperature applications due to their excellent thermal and mechanical properties. The maximum temperature they can withstand depends on the alumina content and the specific operating conditions.

  • High-purity alumina (99% or above): It can withstand temperatures up to 1750°C in both oxidative and reductive atmospheres. For short-term use, it can endure temperatures up to 1800°C.
  • Lower-purity alumina (e.g., 85%): Suitable for short-term use at temperatures up to 1400°C, and recommended for long-term use in stable environments with slow temperature changes.

Advanced Ceramic Hub, established in 2016 in Colorado, USA, is a specialized supplier and manufacturer of graphene 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 ceramics, 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 Boat

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