Advanced Ceramics

Ultramat Advanced Materials and Technologies Ltd. has extensive experience with Advanced Ceramic materials and components. Since 1993, our customers have kept coming back to us with their requirements for Advanced Ceramic materials and custom fabricated parts.

Fabricated parts with excellent surface finishes and tight tolerances are made upon request. Order quantities range from one unit to large run jobs. We strive to provide reliable, problem-free service while providing quality and economic solutions to meet your needs.

Our extensive Advanced Ceramic product portfolio includes ceramic insulators, substrates, sputtering targets, bushings, seal faces etc.

Featured Materials

Aluminium Oxide (Al₂O₃)

Zirconium Oxide (ZrO2)

Aluminium Nitride (AlN)

Boron Nitride (BN)

AlN+BN

Silicon Nitride (Si3N4)

Silicon Carbide ( SiC)

Boron Carbide ( B4C )

Porous Ceramic

Macor

Mullite

Cordierite

Sapphire

BK7

Industries served:

Thermal Processing

Electronics

Semiconductors

Defense Industry

Medical

Fuel cell and energy

Chemical processing

Precision optics

Space

We offer advanced components that are heat stable, wear resistant, highly conductive or electrically dissipative.

Our Advanced Ceramic products include:

Ceramic guide rings

Ceramic laser waveguides

Cooling channel components

Laser and Electron tubes

Surgical device tips

Ceramic Seal faces

Any ceramic substrate

Ceramic sensor components

Tubes, Rods, Rings

Insulators

Ferrules

Nozzles

Crucibles and Trays

Ball mill elements

any custom part

Featured Materials

Aluminium Oxide Grades ( Alumina ):

Properties Units Test 85% Al2O3 90% Al2O3 94% Al2O3 96% Al2O3 98.5% Al2O3 99.5% Al2O3 99.8% Al2O3
Density gm/cc ASTM C20 3.42 3.60 3.70 3.72 3.80 3.90 3.92
Crystal Size Avg. Microns Thin Section 6 4 12 6 6 6 6
Water Absorption % ASTM 373 0 0 0 0 0 0 0
Flexural Strength (MOR) 20C MPa (psi x 10^3) ASTM F417 296 (43) 338 (49) 352 (51) 358 (52) 375 (54) 379 (55) 375 (54)
Elastic Modulus 20C GPa (psi x 10^6) ASTM C848 221 (32) 276 (40) 303 (44) 303 (44) 350 (51) 370 (54) 370 (54)
Compressive Strength 20C MPa (psi x 10^3) ASTM C773 1930 (280) 2482 (360) 2103 (305) 2068 (300) 2500 (363) 2600 (377) 2500 (363)
Hardness GPa (kg x mm^2) Knoop 1000 gm
Rockwell 45N
9.4 (960)
73
10.4 (1058)
75
11.5 (1175)
78
11.5 (1175)
78
13.7 (1400)
82
14.1 (1440)
83
14.1 (1440)
83
Thermal Conductivity 100C W/m K ASTM C408 16.0 16.7 22.4 24.7 27.5 30.0 30.0
Coefficient of Thermal Expansion 25-1000C 1X10^-6 /C ASTM C372 7.2 8.1 8.2 8.2 8.2 8.2 8.2
Thermal Shock Resistance C Quenching 300 250 250 250 200 200 200
Max Use Temp C No Load Cond. 1400 1500 1700 1700 1700 1750 1750
Dielectric Strength ac-kV/mm (ac V/mil) ASTM D116 9.4 (240) 8.3 (210) 8.3 (210) 8.3 (210) 8.7 (220) 8.7 (220) 8.7 (220)
Dielectric Constant 1MHz 25C ASTM D150 8.2 8.8 9.1 9 9.6 9.7 9.8

Zirconium Oxide Grades ( Zirconia ):

Properties Units Test Zirconia Toughened Alumina Magnesia partially Stabilized Zirconia Yttria partially stabilized Zirconia (Sintered) Yttria partially stabilized Zirconia (Hipped)
Density gm/cc ASTM C20 4.01 5.72 6.02 6.07
Crystal Size Avg. Microns Thin Section 2 35 1 1
Water Absorption % ASTM 373 0 0 0 0
Flexural Strength (MOR) 20C MPa (psi x 10^3) ASTM F417 450 (65) 758 (110) 1240 (180) 1720 (250)
Elastic Modulus 20C GPa (psi x 10^6) ASTM C848 360 (52) 200 (29) 210 (30) 210 (30)
Compressive Strength 20C MPa (psi x 10^3) ASTM C773 2900 (421) 1750 (254) 2500 (363) 2500 (363)
Hardness GPa (kg x mm^2) Knoop 1000 gm
Rockwell 45N
14.4 (1475)
85
11.8 (1200)
77
12.7 (1300)
81
12.7 (1300)
81
Thermal Conductivity 100C W/m K ASTM C408 27.0 2.2 2.2 2.2
Coefficient of Thermal Expansion 25-1000C 1X10^-6 /C ASTM C372 8.3 10.2 10.3 10.3
Thermal Shock Resistance C Quenching 300 350 350 350
Max Use Temp C No Load Cond. 1500 500 1500 1500
Dielectric Strength ac-kV/mm (ac V/mil) ASTM D116 9.0 (228) 8.4 (240) 9.0 (228) 9.0 (228)
Dielectric Constant 1MHz 25C ASTM D150 10.6 28.0 29.0 29.0

Surface Finishes Chart

R a-Um- 0.025 0.05 0.1 0.2 0.4 0.8 1.6 3.2 6.3 12.5 25 50
R a-Uinch 1 2 4 8 16 32 63 125 250 500 1000 2000
N Grade N1 N2 N3 N4 N5 N6 N7 N8 N9 N10 N11 N12
Finish Fine lapped Lapping
Superfinishing
Lapping
Superfinishing
Ground Ground Ground Smooth Turned Smooth Turned Medium Turned Medium Turned Rough Machined Rough Machined