Preparation of Reference Samples for Refractoriness Under Load (Non-differential, with Rising Temperature) of Refractories

摘要

The preparation of reference samples for refractoriness under load < non-differential.with rising temperature) of refractories was discussed.According to features and application of reference samples.quartz glass was chosen as a stand-by reference material for uniformity and stability tests.Then.the true value was fixed by gathering the testing results from many labs with stable testing levels and reliable testing results in China.The testing results from these labs were used for normality test by Shapiro-wilk method:and for abnormality value test by Grubbs method.for equal observation test by Cochran method.After confirming no abnormality values among the testing results from the labs.the average values of reference samples were calculated and the uncertainty was appraised.The results show that the standard value of reference samples is 1 386℃and the expanded uncertainty is 12℃.