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  • Users: josephn16
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  1. josephn16

    Force exerted by an ID mandrel

    I hope I can explain this situation well enough, because it is a bit difficult to explain without a drawing: A co-worker of mine is doing a study of a possible interference fit for a product we make that is essentially a ceramic tube with a steel mandrel on the inside. The whole assembly goes...
  2. josephn16

    Instrument Validation

    Hi all, Here's my situation: I have to measure the density of a liquid in my process. The specification is 1525 g/L +/- 2.5 g/L. The instrument that I have been given to measure the density reads from 1500-1600 g/L, in increments of 2 g/L. I do not feel that the instrument is the right...
  3. josephn16

    "Discoloration" in high purity Al2O3

    I am having some troubles with white spots showing up on high purity Al2O3 that is normally an ivory color. The assumption has been that the atmosphere in the kiln is causing the "discoloration", but I have been unable to prove any significant atmosphere differences. Other theories include...
  4. josephn16

    Combustion Information

    Does anyone know I good combustion text, or better yet a seminar or course somewhere that focuses on ceramics?
  5. josephn16

    Temp change through a wall

    Help please, I am a ChemE, and I know I should remember this, but i guess it's just been too long. I have a known temperature on one side of a wall of known thickness and thermal conductivity. How do I calculate the temp on the outside of the wall?
  6. josephn16

    citric acid question

    Basic question on citric acid. I am a ChemE, but working in ceramics industry, so I am the "chemical expert" in the plant, but I am having a hard time figuring this one out. I have a specification for buying Citric Acid and it reads: "C8H8O7 (on anhydrous basis)...
  7. josephn16

    Effects of geometry on heat exchanger

    I have a good friend (who is not very computer literate) who is a Mechanical Engineer in a Forging Plant. He needs to cool steel in a tank of either a polymer solution or just water, and he asked me last night about the effects of the shape of the piece he is attempting to cool. The cooling...
  8. josephn16

    Need help with sump drain design

    I have a dry sump and need a valve on the drain. This valve will need to be closed from time to time, and then opened with the sump full. I would like to avoid creating a "valve box" in the concrete, due to the fact that whatever sealant I would use for the box would have to be...

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