Incomplete sintering is more serious than sealing failure because it directly determines the intrinsic structural stability of the magnesium oxide insulation layer, which is the fundamental guarantee of its insulation performance.
Key Comparison: Incomplete Sintering vs. Sealing Failure
Dimensions: Incomplete Sintering, Sealing Failure
Essential Problems: Internal grains not recrystallized, resulting in a loose structure; external moisture intrusion leads to inadequate protection.
Scope of Impact: Global, irreversible material performance defects; localized, repairable encapsulation problems.
High-Temperature Performance: Micropore enlargement, insulation resistance collapses from the inside; moisture vaporization forms conductive paths along gaps.
Repair Difficulty: Requires a complete redo of the sintering process, resulting in high costs; simply replace the sealing structure, making repair relatively simple.
Long-Term Risks: Even if short-term compliance is achieved, the probability of breakdown exceeds 80% within 3 months; timely intervention can fully restore reliability.
Incomplete sintering is an "inherent defect"; even with excellent sealing, insulation failure will occur at high temperatures due to structural instability.
Sealing failure is an "acquired infection"; as long as internal moisture absorption is not triggered, the overall performance can remain intact.
Actual Impact Analysis
Incomplete sintering has more fatal consequences.
Magnesium oxide fails to form a dense ceramic structure, resulting in a significant decrease in thermal conductivity and insulation.
During operation, localized overheating, carbonization, and breakdown are likely to occur, even leading to tube and shell rupture.
This cannot be remedied by later sealing; refilling and sintering are necessary.
Sealing failures still have room for repair.
As long as the body is sintered well, only the sealing process needs to be strengthened (e.g., ceramic adhesive + metal seal).
The repair effect can be verified through airtightness testing and moisture testing.
In most cases, disassembling the internal materials is unnecessary.
In practice, 90% of early failures stem from incomplete sintering, while sealing problems usually manifest as a slow performance decline with a warning period.
