JPH0521275Y2 - - Google Patents

Info

Publication number

JPH0521275Y2

JPH0521275Y2 JP9283188U JP9283188U JPH0521275Y2 JP H0521275 Y2 JPH0521275 Y2 JP H0521275Y2 JP 9283188 U JP9283188 U JP 9283188U JP 9283188 U JP9283188 U JP 9283188U JP H0521275 Y2 JPH0521275 Y2 JP H0521275Y2

Authority

JP

Japan

Prior art keywords

inner cylinder

outer cylinder

heater unit

heating wire

heat

Prior art date

1988-07-13

Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Expired - Lifetime

Links

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• 238000010438 heat treatment Methods 0.000 claims description 29
• 238000007654 immersion Methods 0.000 claims description 22
• 239000000919 ceramic Substances 0.000 claims description 15
• 239000011810 insulating material Substances 0.000 claims description 5
• WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical group [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 3
• 230000002093 peripheral effect Effects 0.000 claims description 2
• 229910052751 metal Inorganic materials 0.000 description 10
• 239000002184 metal Substances 0.000 description 10
• 230000006866 deterioration Effects 0.000 description 6
• 230000003647 oxidation Effects 0.000 description 6
• 238000007254 oxidation reaction Methods 0.000 description 6
• 229910052782 aluminium Inorganic materials 0.000 description 3
• XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
• 230000007423 decrease Effects 0.000 description 3
• 229910052581 Si3N4 Inorganic materials 0.000 description 2
• 239000000853 adhesive Substances 0.000 description 2
• 230000001070 adhesive effect Effects 0.000 description 2
• 230000037431 insertion Effects 0.000 description 2
• 238000003780 insertion Methods 0.000 description 2
• 239000012774 insulation material Substances 0.000 description 2
• 230000001681 protective effect Effects 0.000 description 2
• HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
• 230000032683 aging Effects 0.000 description 1
• 230000007797 corrosion Effects 0.000 description 1
• 238000005260 corrosion Methods 0.000 description 1
• 238000010586 diagram Methods 0.000 description 1
• 230000000694 effects Effects 0.000 description 1
• 230000005611 electricity Effects 0.000 description 1
• 238000009413 insulation Methods 0.000 description 1
• 239000000463 material Substances 0.000 description 1
• 230000001105 regulatory effect Effects 0.000 description 1
• XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1