Mica sheet for microwave ovens has excellent electrical insulation properties and high mechanical strength, so when using the mold tool pouched mica sheet (thickness 0.3-2.5mm) to the different designs of gasket material. Then the mica sheet gasket material can be used as the holder material in the Microwave oven. The following photo shows the mica sheet parts for a microwave oven and other electrical heating equipment.
mica sheet partsHow to use the rigid mica sheet gasket material in the microwave oven?
The high-quality mica sheet (thickness 0.3-2.5mm) should be punched to different shape mica parts, have held, notch…
Then fix the metal conductor on the mica parts.
How does the mica sheet work?
When electrical current conveyance a metal conductor, the conductor will have very high voltage, high temperature, and even fire breaking out.
That demand conductor’s holder material – mica gasket material has good mechanical strength, when in high voltage and high-temperature operation status.
Mica sheets Properties
Excellent flame-resistance has good performance at temperatures 500`1000 centigrade.
Good dielectric strength, the high voltage resistance is 20kv/mm
Good mechanical strength and toughness, good for machine process the special design in the microwave oven and other kinds of electrical heaters.
Eco-friendly, asbestos-free, smokeless, or seldom.
Type | HP5M | HP5P | HP5S | HP5M-G | HP5P-G | HP5M-L | HP5P-L | Test Method | |
Normal Thickness (mm) | 0.1~3 | 0.1~3 | 0.1~3 | 4-100 | 4-100 | 0.1~3 | 0.1~3 | IEC60371-3-3 | |
Density g/cm3 | 1.7~2.25 | 1.7~2.25 | 1.7~2.25 | 1.7~2.35 | 1.7~2.35 | 1.7~2.25 | 1.7~2.25 | IEC60371-3-2 | |
Mica content % | ≥90 | ≥90 | ≥90 | ≥90 | ≥90 | ≥90 | ≥90 | IEC60371-3-2 | |
Resin content % | ≤10 | ≤10 | ≤10 | ≤12 | ≤12 | ≤8 | ≤8 | IEC60371-3-2 | |
Heat resistant ℃ | Continual | 500 | 700 | 1000 | 500 | 700 | 500 | 700 | - |
Intermittent | 700 | 900 | 1100 | 700 | 900 | 700 | 900 | - | |
Heat Loss | at 500℃ % | ≤1 | ≤1 | ≤1 | ≤2 | ≤2 | ≤1 | ≤1 | IEC60371-3-2 |
at 700℃ % | ≤2 | ≤2 | ≤2 | ≤3 | ≤3 | ≤1.5 | ≤1.5 | IEC60371-3-2 | |
Flexural strength N/mm | ≥160 | ≥150 | ≥160 | ≥180 | ≥180 | ≥150 | ≥150 | GB/T5019 | |
Water absorption 24H/23℃ % | ≤1 | ≤1 | ≤1 | ≤0.5 | ≤0.5 | ≤2 | ≤2.5 | GB/T5019 | |
Dielectric strength KV/mm | ≥20 | ≥19 | ≥20 | ≥20 | ≥20 | ≥18 | ≥18 | IEC60243 at 23 ℃ | |