27 research outputs found
APPLICATION OF HEATING MICROSCOPY ON SINTERING AND MELTING BEHAVIOUR OF NATURAL SANDS OF ARCHAEOLOGICAL INTEREST
In antiquity, beach sand was one of the main raw materials for glass-making and for the production of other vitreous materials, like Egyptian blue and faience. During the 1st century AD, glass and pigments manufacturing industry was active along the Gulf of Naples, Italy, where we sampled four littoral sands. Samples were analyzed with different techniques: chemical analysis was performed by means of X-Ray Fluorescence (XRF) and mineralogical analyses with X-Ray Powder Diffraction (XRPD) and Raman Spectroscopy. The complete sintering to melting thermal behaviour of the four sands was studied by heating microscopy or hot-stage microscope (HSM) equipped with an high resolution camera capable to collect sample profile during heating. The effect of the grain size on the sintering curves, which were automatically elaborated by specimen profile transformation, was also investigated. Finally, some deductions about the granulometry effect and the presence of alkaline and alkaline-earth oxides on sintering and melting behaviour were drawn. All the four sands were found suitable for highly sintered manufacts rather than glasses, to reach complete amorphous materials the addition of fluxes was necessary
L’applicazione di materie prime naturali nella produzione ceramica
L'articolo presenta una rassegna dello stato dell'arte nazionale ed internazionale relativamente all'impiego di materie prime naturali nella produzione ceramica
Application of natural raw materials in ceramic manufacturing.
Natural raw materials, applications, ceramic manufacturing
Application of natural raw materials in ceramic manufacturing
The paper reports the most important considerations on the application of natural raw materials in ceramic manufacturin
Natural raw materials in “traditional” ceramic manufacturing
The presentation focuses on application of natural raw materials in “traditional” ceramic manufacturin
Particle size analysis by laser light scattering to control ceramic process
The main results of a research on application of particle size analysis by laser light scattering to control ceramic process are show
Application of natural raw materials in ceramic manufacturing
During the meeting were discussed the application of natural raw materials in ceramic manufacturing
LASER PARTICLE SIZE ANALYSIS: A TOOL IN DESIGNING TRADITIONAL CERAMIC PROCESSES
Simply by using modern analysis techniques based on light scattering, it is possible to check the characteristics of raw materials or semi-finished products, to impose production control in various stages of the process or to intervene to solve production problems
Natural and synthetic raw materials in traditional ceramic manufacturing
Results on application of natural and synthetic raw materials in traditional ceramic manufacturing, are presented
Wollastonite as sintering-aid in tiles manufacturing
The paper focuses on industrial application of wollastonite as sintering-aid in tiles manufacturin