ALUMINA COMPONENTS UK – DATA SHEET

Our Alumina components (UK)

Alumina components can be produced in a range of purities with additives designed to enhance properties. A wide variety of ceramic processing methods can be applied including machining or net shape forming to produce a wide variety of sizes and shapes of component. In addition it can be readily joined to metals or other ceramics using metallising and brazing techniques.

Alumina components are by far the largest range of uk alumina products made by Advanced Ceramic Engineering. Due to the important combination of properties, we have thoroughly researched the behaviour and characteristics of our Alumina components to give you the best possible alumina components.

 

Property Unit ACE-500 ACE-600 ACE-300 ACE-995 ACE-995 (Fine grain) ACE-1009
AL203 % 94.0 96.0 97.6 99.5 99.5 99.85 min
Flexural Strength  Ibf/in² 50,000  “53 000″ 43,000 45,000 23,000
MN/m² 350 370 300 315 160
Compressive Strength  Ibf/in² >300,000 >300,000 >250,000 >300,000 >100,000
MN/m² >2,100 2,100 1,750 2,100 690
Bulk Specific Gravity 3.64-3.67 3.69-3.72 3.73-3.76 3.84-3.87 3.84-3.87 3.0-3.2
Porosity %water absorption Vacuum tight – 0.00 Vacuum tight – 0.00 Vacuum tight – 0.00 Vacuum tight – 0.00 Vacuum tight – 0.00 porous 6.0-7.0
Colour White White White White White White
Hardness Rockwell 45N 78 79 75 81 81
Thermal Conductivity cal/cm²/cm/sec/°C 0.049 0.051 0.064 0.070 0.038
W/m/K 20.5 25.5 26.8 29.3 15.9
Coefficient of Linear expansion
#8211; 25 degrees #8211; 200 degrees °C per°C (X10⁻⁶) 6.3 6.4 6.9 6.9
#8211; 200 #8211; 400 degrees °C per°C (X10⁻⁶) 7.5 7.6 7.8 7.8
#8211; 400 #8211; 600 degrees °C per°C (X10⁻⁶) 8.0 8.2 8.5 8.3
#8211; 600 #8211; 800 degrees °C per°C (X10⁻⁶) 8.6 8.7 8.8 9.0
#8211; 800 #8211; 1000 degrees °C per°C (X10⁻⁶) 9.1 9.0 9.0 9.4
Maximum working temperature /°C 1600 1620 1650 1725 1725 1800
Dielectric strength D.C volts/mil. (0.100² thick-under oil) 650 675 1100 800
KV/mm 25 26 43 31
Te Value /°C >950 >950 >1000 >975 >1000
Volume Resistivity
25 degrees °C Ohm-cm 1014 >1014 >1014 1014 >1014
300 degrees °C Ohm-cm 2.0×1012 2.0×1012 1.0×1012 2.0×1011 7.0×1011
600 degrees °C Ohm-cm 4.6×104 5.2×108 2.3×1020 6.0×108 1.2×1010
900 degrees °C Ohm-cm 3.5×104 4.1×108 5.0×108 2.5×106 1.6×108
Property Unit ACE-500 ACE-600 ACE-300 ACE-995 ACE-1009
Dielectric Constant 10😉 25°C 300°C 500°C 25°C 300°C 500°C 25°C 300°C 500°C 25°C 300°C 500°C 200°C 
10 MHz 10😉 9.07 | 9.53 | 9.91 9.30 | 9.65 | 10.10 9.53 | 9.91 | 10.14 9.58 | 9.92 | 10.20
1000MHz 10😉 9.04 | – | – 9.20 | – | – 9.00 | – | – 9.30 |  – | –
8500MHz 10😉 8.98 | 9.26 | 9.40 9.16 | 9.30 | 9.45 9.04 | 9.32 | 9.54 9.37 | 9.61 | 9.82 7.07
Dissipation Factor (Tanδ) 25°C 300°C 500°C 25°C 300°C 500°C 25°C 300°C 500°C 25°C 300°C 500°C 200°C
10MHz (Tanδ) 0.00026 | 0.00028 | 0.00341 0.00030 | 0.00061 | 0.00330 0.00004 | 0.00016 | 0.00052 0.00003 | 0.00009 | 0.00040
1000MHz (Tanδ) 0.00062 | – | – 0.00044 | – | – 0.00030 | – | – 0.00014 | – | –
8500MHz (Tanδ) 0.00078 | 0.00115 | 0.00155 0.00062 | 0.00085 | 0.00121 0.00045 | 0.00040 | 0.00072 0.0009 | 0.00014 | 0.00025 0.00011
Loss Factor 25°C 300°C 500°C 25°C 300°C 500°C 25°C 300°C 500°C 25°C 300°C 500°C 200°C
10 MHz 0.00236 | 0.00267 | 0.03369 0.00279 | 0.00588 | 0.03333 0.00038 | 0.00158 | 0.00527 0.00029 |0.00069 |0.00408
100MHz 0.00560 | – | – 0.00405 | – | – 0.00270 | – | – 0.00130 | – | –
8500MHz 0.00700 | 0.01165 | 0.01457 0.0588 | 0.00719 | 0.01143 0.00407 | 0.00973 | 0.00687 0.0084 | 0.00135 | 0.00245 0.00075