Enhancement the mechanical properties of a product porcelain by a ceramic additives using ultrasonic technique

Abstract

This investigation is concerned on the influence of addition ZnO , ZrO₂ ,TiO₂ on the mechanical properties of a porcelain body. Porcelain body is prepared from Iraqi clays (Kaolin Duekhla & Ardhma sand glass), and Feldspar Potash with different weight percent (40% Kaolin, 30% sand glass Ardhma, and 30% Feldspar Potash) , and granular sizes less than (100µm Kaolin, and 50µm for each of  sand glass and feldspar). A prepared disk sample of 27mm in diameter was formed by compaction 75 Mpa for 5 min. The circumstances of heat treatment is 1300^oC for 2hr and an elevation speed of 2 ^oC/min. Effect of the proportion added on mechanical properties of PVC were performed by ultrasonic technique using frequency of 30 KHz. Experimentally, it was found that the adding 2% ZnO + 1% TiO₂ made composite good medium for transferring ultrasound waves, so they can be used as a coated material for objects that we don’t want them to be detected by sonar. Adding 1% ZrO₂ +2% TiO₂ enhances the absorption coefficient of porcelain and the composite becomes good absorber for ultrasound. Adding 2%ZrO₂ +2%TiO₂ made composite not good medium for transferring ultrasound waves , and adding 1%ZnO enhances the compressibility because it has the heights value and ZnO molecules fills the vacancies of porcelain chains.

Keywords: porcelain bodies, kaolin clay, ultrasonic waves