Near-net-shape processed ZnS ceramics by aqueous casting and pressureless sintering

Abstract

In this paper, slip casted ZnS ceramics were pressurelessly sintered at 1000 o C under flowing argon atmosphere. The application of cold isostatic pressing enhanced the microstructural homogeneity of the ZnS green body and therefore contributed to the overall densification progress. Highest relative density of 92% was achieved after sintering for 6 hr, accompanied by remarkable grain growth. Phase transition from sphalerite to wurtzite was found by the prolonged soaking time. The mechanisms for grain growth were analyzed.

Structure-Property Correlation in Ir Transparent Zinc Sulphide (Zns) Ceramics Under Chemical Vapour Deposited & Hot Iso-Statically Pressed Conditions

“…However, the major challenge is achieving the transmission to the close theoretical density >99.9% and retaining the grain size as less as possible to attain superior optical and mechanical properties. Although, previous researchers have studied optical and structural properties of IR transparent polycrystalline ZnS and other ceramics, only few studies are reported room temperature electrical properties, and no report is found on high temperature (500oC) impedance spectroscopic studies [4][5][6][7][8][9][10][11][12][13].…”

Restraining of calcium contamination in near‐net shape alumina ceramics during slip casting

“…A facile shaping method, utilizing colloidal processing, is slip casting. Over the past few decades, slip casting has been adapted for various ceramic systems . This method uses a suspension with the appropriate rheological properties, which is poured into a porous mold; consequently, the liquid portion of the suspension is sucked into the mold leaving the solid phase on its surface…”

“…Over the past few decades, slip casting has been adapted for various ceramic systems. 14 This method uses a suspension with the appropriate rheological properties, which is poured into a porous mold; consequently, the liquid portion of the suspension is sucked into the mold leaving the solid phase on its surface. 15 With respect to the mechanism under which the slip casting process is carried out, Ferreira 16 reported that the driving forces acting during slip casting process (responsible for the packing density of the ceramic particles) are the gravitational force and the capillary suction pressure.…”