Electrical Electro Ceramics
Steatite – Magnesium Silicate
There are 3 basic types of Steatite, and they are stable up to approx 1000°C
1. C220
Standard steatite, low cost electrical insulation.
Common uses
- Fishspine / inter-locking beads
- Sockets
- Low voltage fuse bodies
- Feed through
- Control housings
- Base plate substrates
- Washers & bushes ect
- Terminal blocks
2. C221
Low loss Steatite, also known as Frequentite.
A superior grade of steatite used in cases of high frequency and slightly higher voltages, with better mechanical and dielectric strength & good creep resistance for electrical engineering.
The natural step up from this very popular material is Aluminium oxide.
Common uses
- Electrical insulators
- High voltage fuse bodies
- Male / Female split bushes
- High voltage lamp caps IR & UV
- HF capacitor plates
- Thermocouple connector blocks
- Terminal blocks
- Knuckle beads
- Switch & plug parts
C230 – Super refractory
A porous high frequency grade for applications of intense thermal shock up to 1050°C. Due to its porous composition, it can be machined without the need for diamond grinding.
Common uses
- Cartridge heaters
- Element formers
- Heater bodies
Steatite Interlocking Beads
| Code no. | DIAMETER IN M.M. | QUANTITY (APR.) | TO TAKE | |||
| I.D. Ø | O.D. Ø | PER FOOT |
PER KG. |
WIRE GAUGE |
WIRE SIZE IN M.M. |
|
| GCIB/2 | 1.8 | 4.2 | 70 | 9500 | 16 | 1.63 |
| GCIB/5 | 3.2 | 8.5 | 40 | 1200 | 11 | 2.95 |
| GCIB/6 | 4.0 | 10.0 | 35 | 800 | 9 | 3.66 |
| GCIB/8 | 5.5 | 12.7 | 25 | 400 | 6 | 4.88 |
Steatite Band Heater (Regular)
TOLERANCES FOR WIDTH AND HEIGHT ±0.3 MM, OR 2% WHICHEVER IS GREATER
TOLERANCES FOR LENGTH ±0.30 MM FOR ALL
TOLERANCES FOR HOLES AND SLOTS ±0.15MM
BOW ALLOWANCES 0.15MM OR 0.5% OF THE LENGTH
TOLERANCES FOR LENGTH ±0.30 MM FOR ALL
TOLERANCES FOR HOLES AND SLOTS ±0.15MM
BOW ALLOWANCES 0.15MM OR 0.5% OF THE LENGTH
| DIMENSION | |
| H | 13.7 |
| W | 9.0 |
| ØD | 4.75 |
| S | 1.7 |
Steatite-cartridge-heater
| O.D. | I.D. | H | H1 | H2 | O.D.1 | P.C.D. |
| 10.00 | 2.50 | 6.00 | 3.00 | 3.00 | 8.00 | 3.70 |
| 16.00 | 4.20 | 10.00 | 5.00 | 5.00 | 14.50 | 7.00 |
| 12.50 | 2.50 | 9.00 | 5.00 | 4.00 | 10.40 | 4.50 |
| 19.90 | 4.20 | 12.00 | 5.00 | 7.00 | 17.90 | 9.80 |
| 25.80 | 4.30 | 12.00 | 5.00 | 7.00 | 22.50 | 11.50 |
NOTE :
DIMENSIONAL TOLERANCE: UP TO 5MM : ±0.15
FROM 5 TO 10MM : ±0.20
OVER 10 MM : ±2%
* * DETAILED DRAWING AVAILABLE ON REQUEST.
DIMENSIONAL TOLERANCE: UP TO 5MM : ±0.15
FROM 5 TO 10MM : ±0.20
OVER 10 MM : ±2%
* * DETAILED DRAWING AVAILABLE ON REQUEST.
Steatite Capacitor Bush & Gromet
| A-CAPACITOR BUSH TOP | ||||||||
| PRODUCT | A | B | C | D | E | F | G | WEIGHT IN GRM |
| 19.7 | 10.4 | 12.0 | 5.7 | 17.0 | 4.7 | 3.9 | 7.7 | |
| 39.8 | 23.5 | 18.0 | 10.5 | 27.0 | 2.7 | 8.0 | 49.5 | |
| B-CAPACITOR BUSH BOTTOM | ||||||
| A | B | C | D | E | WEIGHT IN GRM | |
| 20.0 | 6.0 | 10.2 | 6.0 | 9.5 | 5 | |
| 38.7 | 10.5 | 19.2 | 8.3 | 14.8 | 29 | |
| d1 | d2 | d3 | d4 | I1 | I2 | I3 | I4 | WEIGHT IN GRM |
| 15.00 | 12.00 | 10.00 | 7.00 | 8.00 | 5.50 | 3.00 | 2.00 | 2 |
| 25.00 | 18.00 | 16.50 | 13.00 | 12.00 | 8.00 | 2.25 | 2.00 | 6 |
Formers (Resistance)
| TYPE | L | O.D. Ø | O.D.1 Ø | I.D. Ø | WEIGHT IN GRM |
| A | 190.00 | 38.00 | 28.00 | 10.00 | 300 |
| B | 365.00 | 44.00 | 38.00 | 22.00 | 615 |
| C | 250.00 | 15.00 | 14.50 | 6.50 | 54 |
| PRODUCT | L | W | H | h1 | h2 | S | R1 | R2 | C/C | TEETH | WEIGHT |
| 86.50 | 25.40 | 27.36 | 21.00 | 8.50 | 2.39 | 12.70 | 15.87 | 6.20 | 14 NOS. | 105 | |
| 86.50 | 25.40 | 27.36 | 21.00 | 8.50 | 2.39 | 12.70 | 15.87 | 10.90 | 08 NOS. | 110 |
| L | l1 | l2 | h1 | h2 | S | R1 | R2 | TEETH | WEIGHT |
| 86.50 | 2.50 | 6.17 | 5.00 | 12.50 | 2.80 | 12.50 | 16.00 | 14 NOS. | 92 |
| 86.50 | 5.00 | 12.36 | 5.00 | 12.50 | 2.80 | 12.50 | 16.00 | 07 NOS. | 89.5 |
Din Type Steatite Ceramic HRC Fuse Body
| CURRENTRATING | PRESSURE BURSTINGSTRENGTH | L | B1 | B2 | C1 | C2 | THREADS | WEIGHT | |
| 60-100 A, 500 V | 400 PSI [28 kg/cm²] | 44 | 40 | 20.5 | 32 | 13 | B2.8 X 13 DIN 7970 | 58.5 grm | |
Round Barrel
| ITEM | ØA ±0.05 | ØB ±0.50 | L ±0.50 | D x 45° CHA. | WEIGHT |
| 15 AMP | 12.17 | 6.40 | 28.50 | 1.00 | 5.4 |
| 30 AMP | 20.04 | 10.70 | 48.00 | 1.00 | 25.3 |
| 60 AMP | 24.00 | 14.00 | 49.00 | 1.00 | 34.2 |
Note:
- ALL DIMENSIONS ARE IN M.M
- BURSTING STRENGTH: 60 KG / CM²
- BREAKING STRENGTH: 100 KG / CM²
- DETAILED DRAWING AVAILABLE ON REQUEST.
Steatite Ceramic Bush MALE & FEMALE
| CERAMIC BUSH MALE | |||||||||
| A | B | C | D | H | H1 | H2 | H3 | WEIGHT | |
| 30.00 | 22.00 | 13.00 | 21.00 | 23.00 | 15.00 | 8.00 | 7.00 | 24 | |
| 40.00 | 27.50 | 16.90 | 25.80 | 33.00 | 21.00 | 12.00 | 12.00 | 55 | |
| 36.00 | 19.00 | 10.50 | 18.50 | 23.80 | 16.00 | 7.80 | 8.00 | 38.5 | |
| CERAMIC BUSH FEMALE | ||||||
| A | B | C | H | H1 | WEIGHT | |
| 33.00 | 19.00 | 10.50 | 16.00 | 8.00 | 33 | |
| 41.00 | 24.50 | 12.80 | 20.00 | 10.00 | 56 | |
.M.L.V. (MOSQUITO LIQUID VAPOURISER)
LWHMATERIAL
| 32.25 | 25.10 | 12.50 | C-221 |
.M.C.B. PLATE
| ART | L | W | Thik | L1 | WT |
 |
28.00 | 16.60 | 2.00 | 24.50 | 1.8 |
 |
26.60 | 17.00 | 2.00 | – | 1.6 |
 |
28.30 | 17.00 | 2.00 | 24.50 | 1.8 |
 |
28.00 | 16.00 | 2.00 | 24.50 | 1.8 |
Material Specification
| Material Properties | Unit | SteatiteGrade L-3 | SteatiteGrade L-5 | CordieriteRefractory | NormalPorcelain | High AluminaPorcelain | AluminaCeramic | DenseCordierite | ||
| Equivelentto DIN EN 60672 | C-220 | C-221 | C-511 | C-112 | C-610 | C-780 | C-210 | |||
| PHYSICALPROPERTIES | ||||||||||
| Colour | Off White | Off -White satin smooth | Brown | Cream/ White/ Grey | Off .White | Brown | Off -White | |||
| SpecificGeavity | 2.6 | 2.7 | 1.9 | 2.3 | 2.6 | 3.2 | 2.2 | |||
| WaterAbsorbtion | % | 0.5 | 0 | 15-20 | Less 1 | 0 | 0 | Less 2% | ||
| FlexuralStrength | kg /cm 2 | 1200 | 1400 | 300 | 800 | 1200 | 2500 | – | ||
| CompressiveStrength | kg /cm2 | 4000 | 5000 | 2000 | 2500 | 3500 | 16000 | 2500 | ||
| Young’sModulus | kg/cm2X106 | 0.8 | 1 | – | 0.7 | 1 | 2 | – | ||
| Hardness | Moh’s Scale | 6–7 | 6–7 | – | 6-6.5 | 7 | 8 | – | ||
| THERMALPROPERTIES | ||||||||||
| Co-officent of Thermal Expantion (30-600 degree Celsius) | x 10-6 / ° C | 6–7 | 6–7 | 4–5 | 6–7 | 5–6 | 6–8 | 4–5 | ||
| ThermalConductivity | W/M ° K | 2–3 | 2–3 | 1.3-1.8 | 1.4-2.5 | 2–6 | 10–16 | – | ||
| SafeOperation Temp. | ° C | 1000 | 1050 | 1000 | 600 | 1000 | 1100 | 1000 | ||
| ELECTRICALPROPERTIES | ||||||||||
| VolumeResistivity (20° C) | Ohm-cm | 10 11 | 10 11 | – | 10 11 | 10 11 | 10 12 | – | ||
| CHEMICALCOMPOSITION N.P. | ||||||||||
| SiO2 | % | 60-65 | 60-65 | 55-57 | 70 | 40-45 | – | 70-75 | ||
| AI2 O3 | % | 15-17 | 6–7 | 30-32 | 20 | 45-50 | app.80 | 15-17 | ||
| Mg o | % | 18–20 | 25-27 | 7–8 | – | – | – | 10–12 | ||