Preparation of high-density fused quartz ceramics based on a J2-optimality mixed orthogonal method

Abstract

A method for obtaining high-performance fused silica ceramics was investigated in this work. An advanced experimental method was used to prepare green bodies. The optimal experimental scheme was deduced using the hybrid orthogonal experiment method of J2-optimality. The solid-phase content, the amount of dispersant, the pH and the milling time were used as variables. The effects of various factors related to the processing of fused silica ceramics on the performance of the crucible were studied. The structure and properties of the samples were characterized by using a universal testing machine, a scanning electron microscope, an electron density meter and an X-ray diffractometer. The results show that a solid-phase content of 65 wt%, a pH of 5, a dispersant content of 2.5 wt% and a milling time of 15 led to a green body with a flexural strength of 18.5 MPa and a bulk density of 1.91 g/cm3, resulting in ceramics with improved mechanical properties.