The purpose of this study was to evaluate the effect of different surface treatments of yttria-stabilized tetragonal zirconia (Y-TZP) on bond strength durability and marginal discrepancies. For adhesion testing, 144 specimens of VITA In-Ceram YZ ceramic for InLab were obtained (5.25×3.75×4.5 mm) and divided into six groups (n=24) according to the surface treatment: 1) Control (CRTL): untreated;...

Statement of Purpose: This article will report the study on a new generation bioactive ceramic, based on MgKPO4 (Magnesium Potassium Phosphate, abbreviated as MKP) for biomedical applications. A series of heat treatment experiments on the slip cast silica (SiO2) containing MKP ceramics were carried out at 900, 1,000 and 1,100C for 4 h in air. The density of the slip cast ceramic increased to 2....

there are many small kaolin deposits in iran , which are extracted and used in ceramic industry without any treatment. this investigation was aimed to study the ore and to find whether a fine material can be produced for paper usages. the ore was studied by xrd, dta, optical and scanning microscopy. physical properties, such as brightness were also examined. the main minerals , presented in sem...

This study evaluated the effect of chairside and laboratory types of surface conditioning methods on the adhesion of dual-cure resin cement with MDP functional monomer to zirconia ceramic after thermocycling. Disk-shaped (diameter: 10 mm, thickness: 2 mm) Y-TZP ceramics (Lava, 3M ESPE) were used (N=40) and finished with wet 1200-grit silicon carbide abrasive paper. Specimens were randomly divid...

A commodity inkjet printer was modified to print layered ceramic structures on stiff glass substrates, using inks in the form of sols with mullite stoichiometry. The sol composition optimized terms ink viscosity, surface tension, and evaporation properties. then fed into a multi-nozzle head deposited by ink-jetting. Thin lines without bulges thickness ∼1.8 μm concave profile line width ∼100 wer...

The aim of this study was to evaluate the shear bond strength of rebonded ceramic brackets after subjecting the bracket base to different treatments. Seventy-five premolars were selected and randomly distributed into five groups (n=15), according to the type of the bracket surface treatment: I, no treatment, first bonding (control); II, sandblasting with aluminum oxide; III, sandblasting + sila...

This work applies established analytical techniques of physical sciences to Irish brick in order to gather evidence of ceramic technologies, provenance and sources of raw materials. Petrographic microscopy, X-ray diffractometry and scanning electron microscopy with an energy dispersive Xray diffraction attachment were used to study the brick of Rathfarham Castle, Dublin, built c.1618, where cla...

Abstract Fiber reinforced composite is widely used in current stab-proof equipment, the high performance and light weight have always been pursued for a long time. The present study optimizes anti-stab of fiber composites by using silica silicon carbide ceramic particle reinforcements. different processes structures were characterized. Silica reinforcements added to fabric form shear thickening...