LOI Test for Ceramic Raw Materials: Methods & Analysis
Learn what LOI (Loss on Ignition) test is and how it is done for ceramic raw materials. Covers the step-by-step method and LOI calculation formula.
LOI Test for Ceramic Raw Materials: Methods & Analysis
Overview
LOI test is done on all incoming raw materials. It is particularly useful for raw materials other than clay, to understand the percentage of organic materials present in those materials.
The Loss on ignition helps to understand the loss of weight in the raw materials during firing after material is dried. Major part of loss of ignition comes from the chemically combined water in the raw material and the organic content. LIO significantly influences raw material shrinkage and firing properties.
Test Procedure
Weigh an empty crucible and record as W1
Take 100g of raw material and place it in a drier for one hour
Allow the material to cool in the desiccator
Weigh the crucible plus dried raw material and record as W2
Place the crucible in the kiln for firing
After firing, cool the crucible in the desiccator
Weigh the crucible with fired raw material and record as W3
LOI Calculation
LOI (%) = [(W2 - W3) / (W2 - W1)] × 100
Share this article
Previous
Casting Rate Test for Ceramic Slip: Methods & Analysis
Next
Warpage Test for Ceramic Body: Methods & Analysis
Written by
CeramicNinja
Ceramic industry professional & content contributor.
Leave a Comment
Add your comment
No comments yet. Be the first to share your thoughts!
Keep exploring
Hand-picked across articles, marketplace and jobs
Article40 Important Laboratory Tests in Sanitaryware Manufacturing
Various tests are being carried out by the laboratory in a sanitary ware production process to ensure the Quality of the Final product. And testing starts from raw material discharge area up to Dispatch. This test are very important to keep the rejec
Read article
Marketplace