A very thin crack was produced in the alumina tube of our tube furnace possibly due to some thermal shock. I want to know is there any solution to fill that crack.
Dear Muhammad,
Generally, two types of crack might occur on the alumina tube. The cracks are fairly common and are caused by the stresses generated by heat. The cracks are fairly common and are caused by the stresses generated by heat.
1. Radial crack at or near the seal to the alpha ring.
2. Longitudinal crack running along part of the length of the tube.
It is possible to fix a leak in a ceramic pipe yourself if you do not want to retrofit or replace the pipe yet. This method can be used whether a pipe is simply cracked or has sprung a leak.
You can fix the leak or crack by simply installing inflatable pipe tubing. Look for a piece of tubing that is large enough to cover the leak or the crack and insert it in the pipe. Push it until it covers the leak or the crack. The tubing will inflate once you pull the cord. The tubing will automatically stop inflating once it touches the pipe and should prevent the water from leaking. Keep in mind that this is a temporary fix. This is an easy way to fix a pipe that is leaking or that is cracked but you will eventually need to get a plumber to replace the pipe.
Vacuum the dust from the damaged area. Remove all the contaminant. Otherwise it will melt and embed deeper. Smooth the surface mix with filler and with a small putty knife. Allow it to dry before firing the tube. You can repair using fller such as Sheffield Bronze 1454 Porcelain Filler/Repair/ Fixture Fix PF-12 Fill-A-Fix Porcelain Filler/ Minwax 21600000 High-Performance Wood Filler etc.
Refer site:
http://www.cotronics.com/vo/cotr/ca_1.htm
Ashish
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