Give us a call
Aluminum Nitride (AlN)
Aluminum nitride ceramics are high-performance ceramic materials that are mainly composed of aluminum nitride (AlN) compounds. This material is used in a wide range of applications undefined due to its unique natural science and chemical properties.
Aluminum nitride ceramics have extremely high thermal conductivity, making them useful in electronic packaging, optical maser technology, nuke and rutherfordium applications, high-temperature environmental applications, and optical devices. Its high energy conductivity is typically in the straddle of 140 to 170 W/m-K, a prop that makes it an ideal root for caloric management.
Properties
- High Thermal Conductivity: Aluminum nitride ceramics have high thermal conductivity ranging from 140 to 320 W/m-K, which makes them excellent for wake dissipation applications, especially in power electronics and high public presentation computing devices.
- Electrical insulation properties: Aluminum nitride ceramics have good physical phenomenon insulation properties, which makes them right for physical science packages and micro-cook and RF components that require high insulation.
- Chemical stableness and Mechanical Strength: aluminum nitride ceramics usher high chemical stability and mechanical strength, which allows it to be used in extreme environments such as high temperatures and corrosive conditions.
- Low Coefficient of Thermal Expansion: Aluminum nitride ceramics have a synonymous coefficient of thermal expanding upon compared to silicon, which helps tighten structural distortion due to temperature changes, thereby increasing product reliability and life.
- Low nonconductor constant and dielectric loss: Aluminum nitride ceramics have a low dielectric constant and dielectric loss, which is noteworthy for designing highly efficient electromagnetic devices.
- Resistance to plasma erosion: Aluminum nitride ceramics also show considerable resistance to plasma erosion, which allows it to maintain its performance in high-temperature plasma environments.
| ITEMS | UNIT | PARAMETER |
| Al2O3 Purity | % | 95 |
| Color | ‐ | Light Grey |
| Density | g/cm3 | ≥3.3 |
| Water Absorption | % | 0 |
| Moh’s Hardness | ‐ | 8 |
| Flexural Strength(at 25℃) | Mpa | 365-420 |
| Compressive Strength(at 25℃) | Mpa | 310-320 |
| Thermal Conductivity | W/m.k | ≥170 |
| Coefficient of Thermal Expansion(20~300℃) | 10‐6/℃ | 4.6 |
| Max working temperature | ℃ | 1800 |
| Volume Resistivity | Ω.cm | 1013 |
| Dielectric Constant(1MHz, 25℃) | ‐ | 9 |
| Dielectric Loss(1MHz, 25℃) | ‐ | 3.8 X 10-4 |
| Dielectric Strength | KV/mm | 17 |
Aluminum Oxide (Al2O3)
Alumina ceramics is an advanced ceramic stuff with alumina (Al2O3) as the main component. It has really high hardness, excellent mechanical strength and good high-temperature resistance. Alumina ceramics are widely used in a variety of fields due to their many superior natural science and chemical substance properties.
Properties
- High thermal conductivity and insulating ability, making them used as insulating materials in electrical and electronic technology.
- Resistance to corrosion, which makes them suitable for use in areas such as the chemical industry and aerospace.
- High melting point and very high hardness, which makes alumina ceramics very suitable in structural, abrasive, and corrosive environments.
- Good conductivity and mechanical strength for thick-film integrated circuits.
Material | Unit | 95% Al2O3 | 99% Al2O3 | 99.5% Al2O3 | 99.8% Al2O3 |
Purity | % | 95 | 99 | 99.5 | 99.8 |
Color | — | White/Pink | Ivory | Ivory | Ivory |
Density | g/cm3 | 3.65 | 3.85 | 3.90 | 3.92 |
Water Absorption | % | 0 | 0 | 0 | 0 |
Moh’s Hardness | — | 9 | 9 | 9 | 9 |
HV Hardness | — | >1300 | 1700 | 1750 | 1800 |
Flexural Strength @25℃ | Mpa | 300 | 330 | 375 | 390 |
Fracture Toughness | Mpa.M1/2 | 3~4 | 3~4 | 4 | 4 |
Compressive Strength (25℃) | Mpa | 2200 | 2350 | 2450 | 2500 |
Thermal Conductivity @25℃ | W/M.K | 18-22 | 27 | 29 | 32 |
Thermal Expansion Coefficient | 10-6mm/℃ | 8 | 8 | 8 | 8 |
Thermal Shock Resistance | △T(℃) | 220 | 180-200 | 180-200 | 180-200 |
Max. Working Temperature | ℃ | 1500 | 1700 | 1750 | 1750 |
Dielectric Strength | Kv/Mm | 16 | 20 | 22 | 22 |
Electrical Resistivity (@25℃) | Ω.Cm | 1014 | 1014 | 1014 | 1014 |
Dielectric Constant (@1MHz, 25℃) | — | 9 | 9.7 | 9.7 | 9.8 |
Dielectric Loss (Tan Delta) | — | 0.0004 | 0.0002 | 0.0001 | 0.0001 |
Beryllium-oxide ceramic
Global demand for batteries is increasing due to a worldwide movement towards electrification. Very high levels of growth are expected within this sector as companies continue to develop new technologies to meet these demands.
Almath is already supporting research and development in this sector by supplying customers working on both lithium-ion and solid-state battery technology with alumina, glassy carbon and other resistant materials.
For more information regarding our range of ceramic materials for battery applications please contact us.Properties
- High Thermal Conductivity: Beryllium oxide ceramics have super senior high school thermal conductivity, which makes them excellent in high-temperature environments.
- High Melting Point: Beryllium oxide has a very high melting target of approximately 2570 degrees Celsius (4922 degrees Fahrenheit), which makes it suitable for high-temperature applications.
- High Strength and Hardness: atomic number 4 oxide ceramics have high mechanical effectiveness and Mohs insensibility (9.0), which makes them superior at withstanding high loads and impact resistance.
- High Insulation: glucinium oxide ceramics have high insulating properties, moo dielectric constant (~6.7), and low insulator loss (0.0012), which allows them to be old as insulating materials in electronic devices.
- Chemical Stability: Beryllium oxide undefined has senior high school chemical stability, does not react easily with the highest degree chemicals, and is resistant to acids, alkalis, and many undefined substances.
- Good process adaptability: Beryllium oxide ceramics can be equipt by high-temperature sintering and other processes, with good work on adaptability.
- Low-frequency loss: Beryllium oxide undefined has moo loss at low frequencies, which helps to reduce signal interference.
Material Type | Unit | 97%BeO | 99%BeO |
Colour | —— | White | White |
Density | g/cm³ | ≥2.85 | ≥2.85 |
Flexural Strength | MPa | ≥170 | ≥190 |
Air Tightness | Pa.m³/s | ≤10×10-11 | ≤10×10-11 |
Average Grain Size | um | 12~30 | 12~30 |
Maximum Use Temperature | ℃(No load) | 1600 | 1600 |
Thermal Conductivity @ 25°C | W/(m・K) | ≥200 | ≥240 |
Thermal Conductivity @ 100°C | W/(m・K) | ≥160 | ≥190 |
Thermal Expansion a at 25–500°C | 1 x 10-6/°C | 7~8.5 | 7~8.5 |
Thermal Shock Resistance | ℃(Put in water) | 800 | 800 |
Dielectric Constant | 1MHz | 6.9±0.4 | 6.9±0.4 |
Dielectric Strength | KV/mm | 50 | 50 |
Dielectric Loss | 1MHz | 4 x 10-4 | 4 x 10-4 |
Volume Resistivity @ 25°C | Ω・cm | ＞10 14 | ＞10 14 |
Volume Resistivity @ 300°C | Ω・cm | ＞10 11 | ＞10 11 |
Boron Nitride (BN)
Boron Nitride is an advanced undefined material synthesized from hexagonal B nitride and known as “white graphite”. Boron nitride resembles graphite, simply unequal graphite, it acts as an excellent electrical insulator with higher oxidation temperature. It exhibits remarkable thermal conductivity, and thermal shock resistance, and can be easily machined into very shapes.
The performance and suitableness of Boron Nitride materials are influenced by variations in their composition, including the type and amount of binder, overall composition, and the bonding between layers. These factors have a material purpose in determining the unique characteristics of different Boron Nitride products.
Properties
1.High-Temperature Stability: Boron nitride ceramics are able to withstand super-high temperatures without significant structural changes or stage transitions. This makes them ideal for employment in high-temperature environments such as furnace components, crucibles, and protective coatings.
2.Good heat and corrosion resistance: BN ceramics exhibit excellent energy shock and undefined resistance, properties that make them useful in industries such as aerospace, electronics, and metallurgy.
3. High Thermal Conductivity: Hexagonal B nitride (h-BN) has high thermal conductivity, which makes it an effective energy direction material commonly used for heat scattering in natural philosophy devices and high-temperature applications.
4. Electrically insulating: BN ceramics have good electrical insulating material properties, which allows them to be secondhand as an insulating material in high-power electronic devices.
5. Chemically Inert: Due to their chemical inertness, BN ceramics are stable in a wide range of corrosive environments and are not easily attacked by molten metals.
6. Self-lubricating: BN ceramics are self-lubricating, which reduces friction and wear out without additional lubricants, an important advantage for mechanical components that require long-term operation.
7. Machinability: Although BN undefined are generally hard, their machinability can be improved by adding hexagonal boron nitride to the ceramic matrix, making machining easier to perform.
Material Type | BN-997 | BN-99 | BN-A | BN-B | BN-C | BN-D | BN-E |
Main Content | BN>99.7% | BN>99% | BN+AL+SI | BN+ZR+AL | BN+SIC | BN+ZRO2 | BN+AlN |
Color | White | White | Light Grey | Light Grey | Grey Green | Dark Grey | Grey Green |
Density (g/cm3) | 1.6 | 1.95-2.0 | 2.2-2.3 | 2.25-2.35 | 2.4-2.5 | 2.8-2.9 | 2.8-2.9 |
Flexural Strength (Mpa) | 18 | 30 | 65 | 65 | 80 | 90 | 90 |
Compressive Strength (Mpa) | 45 | 85 | 145 | 145 | 175 | 220 | 220 |
Electrical Resistivity (Ω.Cm) | >1014 | >1014 | >1013 | >1013 | >1012 | >1012 | >1013 |
Max. Service Temp. (℃) @Air Condition | 900 | 900 | 900 | 900 | 900 | 900 | 900 |
Max. Service Temp. (℃) @Vacuum Condition | 1800 | 1800 | 1750 | 1750 | 1800 | 1800 | 1750 |
Max. Service Temp. (℃) @Inert Gas Condition | 2100 | 2100 | 1750 | 1750 | 1800 | 1800 | 1750 |
Thermal Conductivity (W/Mk) | 35 | 40 | 35 | 35 | 45 | 30 | 85 |
Thermal Expansion Coefficient (25 – 1000℃) (10-6/K) | 1.5 | 1.8 | 2.0 | 2.0 | 2.8 | 3.5 | 2.8 |
Magnesium Oxide
Magnesium oxide ceramics is a ceramic stuff with magnesium oxide (MgO) as the main body, which has excellent high-temperature public presentation and chemical stability. Magnesium oxide undefined goes to the cubic crystal system, NaCl-type structure, its melting point is upwards to 2800 ℃ ± 13 ℃, Mohs hardness is 6.
Magnesium oxide ceramics have good conductivity, physics effectiveness, and high temperature underground at high temperatures, merely their tensile strength, compressive effectiveness, and flexural strength are relatively low. In addition, atomic number 12 oxide is a goodness dielectric with an electrical resistance of more than 10^14 Ω-cm at board temperature, which decreases sharply with increasing temperature.
It can also be synthesized, compounded, or secondhand as an additive with strange compounds to make high-performance ceramics or crystals. For example, in electronic ceramics, atomic number 12 oxide is secondhand as a high-purity powder to improve material properties.
In conclusion, Mg oxide undefined is a special ceramic material with first-class high-temperature performance and chemical stability, which is widely used in several industrial fields.
Properties
- High melting point: The melting point of magnesium oxide is as high as 2800°C±13°C, which makes magnesium oxide undefinedand remains stable at very high temperatures.
- Low hardness and strength: the Mohs hardness of magnesium oxide undefinedis 6, the tensile strength, compressive strength, and flexural strength are much lower than that of sintered Al2O3, and its high-temperature strength is also
- Excellent insulating properties: magnesium oxide is a good insulator, the resistanceat room temperature is greater than 1014Ω-cm, and with the increase in temperature, the resistivity will be sharply reduced.
- High-temperature stability and corrosion resistance: the metaphysicalservice temperature of magnesium oxide ceramics is upward to 2200℃, and it tin be used for a long time at 1600℃~1800℃. Its high-temperature stability and corrosion underground are better than alumina ceramics, and Fe, Ni, U, Th, Zn, Al, Mo, Mg, Cu, Pt, etc. do not work, so it has a wide range of applications in the smelting industry, much as iron and steel, glass.
- Chemical stability: magnesium oxide itself has warmanti-erosion ability to alkaline metal solution, and the equipt atomic number 12 oxide ceramic crucible has excellent chemical substance performance and stability to resist metal erosion.
Quartz
The metal assaying industry relies heavily on the use of high temperature ceramic crucibles for assaying, lab analysis and testing for ferrous and non-ferrous metals.
The high purity Alumina crucibles we at Almath provide are trusted for their thermal shock resistance properties, allowing them to perform at a high level consistently over time, meaning greater efficiency and cost savings for our clients.
For more information regarding our crucibles and their uses in the assaying industry please contact us.
Properties
- Milky quartz, also known as milky quartz, is a special version of quartz that is primarily characterized by a milky or creamy appearance. This color is due to the presence of flyspeck gaseous or liquid inclusions within the quartz crystals, which are unfocussed passim the crystals, resulting in their singular milky whiten color.
The watch crystal structure of whitish quartz belongs to the three-party watch glass system, usually in the spring of hexagonal columns, and crystallization is common. This quartz has a callosity of 7, a particular gravity of 2.65, a shell-like fracture, and a greasy luster.
In industrial applications, whitish quartz is widely used for its high purity, thermal stableness, and undefined resistance. For example, it can be used in the manufacture of quartz glass tubes that are tolerable to strong acids and alkalis, and such tubes tin be secondhand for long periods at temperatures below 1050°C. In addition, whitish quartz is old as semiconductor-grade stuff in semiconductor wafer fabrication processes, as well as in star cell wafer manufacturing processes.
In summary, opalescent quartz is an edition of quartz with a distinctive color and many uses, and its discovery in nature as well as its use in manufacture and jewelry shows its unique prize and properties. - Quartz glass is an amorphous material composed of a single component of atomic number 14 dioxide (SiO2) and has a variety of superior physical and chemical substance properties. The following are some of the key properties of quartz glass:
High-temperature resistance: quartz glass is extremely inflamed tolerant and can withstand temperatures up to 1200°C without deformation, which makes it very stable in high-temperature environments.
Low Coefficient of Thermic Expansion: Quartz glass has a super low thermal expansion, which means that it undergoes virtually nobelium change in shape or size when the temperature changes, frankincense ensuring its accuracy and reliability.
Excellent Optical Properties: Quartz glaze has superior light transmittance in the ultraviolet to infrared light region, which makes it very important in physical science applications such as the fabrication of high-quality lenses and prisms.
Chemical stability: quartz glass has first-class resistance to to the highest degree of chemicals, especially at high temperatures, and its acid resistance far exceeds that of other materials.
Electrical insulating material properties: quartz glass has good electrical insulation properties, which makes it widely old as an insulating material in electronic equipment.
Mechanical Strength: lechatelierite glass has senior high school compressive and stress strength, these properties make it first-class in withstanding physical science stress.
ITEMS | Opaque Quartz Glass | Clear Quartz Glass |
Density | 1.92 X 1 Q3kg/m3 | 2.2g/cm3 |
Compression Strength | > 1.0 x 109Pa(N/m) | / |
Coefficient of Thermal Expansion (20-300 °() | 5.4x 10·1cm/cm°C | 5.7×10·1 cm / cm.•c |
Thermal Conductivity(20°C) | Low | 1.4 W / m.°C |
Specific Heat | 640J/Kg°C | 670 J / Kg.•c |
Softening Point | 1508°( | 16so·c |
Annealing Point | 1050°( | 121o·c |
Hardness | 7 Mohs’ | 5.5-6.SMohs’ |
Dielectric Constant(1MHz, 25℃) | / | 3.75 |
Dielectric Strength | / | 5×107 V/m |
ITEMS | Quartz Ceramics |
SiO 2 | ≥99.5 |
Max Operation Temperature (·c) | 1650 |
Volume Density (g/cm3 ) | ≥1.78 |
Apparent porosity (%) | ≤15 |
Room Temperature Compressive Strength (MPa) | ≥50 |
Room Temperature Flexural Strength (MPa) | ≥20 |
Thermal Conductivity (w/m k) (RT-1100’C) | 0.60-1.70 |
Thermal Expansion Coefficient(‘C-1) (RT-1000’C) | ≤0.9x 10 |
Crystallinity (vol/%) | ≤1 |
Zirconium Oxide（ZrO2）
Zirconia ceramic (ZrO2, Zirconium Oxide) is an ideal techncial ceramic for structural parts, it has relatively high schoo fracture temper among all technical ceramics， overcoming the inherent brittleness of undefined to some extent. zirconium dioxide undefined too has rattling senior high school hardness, mechanical strength and wear resistance in room temperature and wish increase the serve life of workpiece greatly.
Properties
- Physical and mechanical properties:
Zirconia ceramics have superhigh hardness and strength, with a Mohs hardness of about 8.5, comparable to steel.
It has good flexural strength, fracture toughness and wear down resistance, making it one of the strongest undefined
The density is high, with a theoretical density of up to 6.05g/cm³, only can be encourage stabilized with the addition of yttrium oxide stabilizers.
2.Chemical Stability:
Zirconia ceramics show goodness chemical inertness and are resistant to galore chemicals.
It is sufficiently stalls against alkaline solutions as well as many acid solutions, but is not stable against acid-forming solutions under extremum conditions such as warm concentrated H2SO4, HF and H3O4.
3.Thermal properties:
It has excellent high temperature resistance, and the uttermost use temperature can be more than 2200℃.
Low thermal conduction makes it a good thermal insulator and suitable for insulation applications.
4.Electrical properties:
Insulator at room temperature and semiconducting at high schoo temperatures.
It has good insulating and insulator properties and is suited for use in the inven and encapsulation of electronic components.
5.Biocompatibility:
In the medical field, due to its good biocompatibility, it is widely used in artificial joints, alveolar restoration materials and so on.
6.Optical Properties:
High refractive index, can be used in the manufacture of optical lenses, lenses, etc.
Item | Unit | Technical parameters |
Material | — | Y-PSZ |
Color | — | White |
Density | g/cm3 | 5.95-6.05 |
Hardness(HV 0.5) | — | 1300 |
Fracture Toughness | Mpa.M1/2 | 7 |
Flexural Strength (@R.T.) | Mpa | 900 |
Compressive Strength (@R.T.) | Mpa | 2200 |
Thermal Conductivity (@R.T.) | W/Mk | 2.2 |
Coefficient Of Thermal Expansion (20-1000℃) | 10-6/℃ | 10.3 |
Thermal Shock Resistance | △T（℃） | 280-350 |
Max. Working Temperature (@R.T.) | ℃ | 850 |