During the course of history, human ingenuity and rise of technology enabled our ancestors to conquer the ability to create glass some 3 thousand years ago. Even though our modern technology enables us to create glass in much larger quantities, the initial recipe and ingredients that were perfected in Ancient Egypt, Rome and Persia remains
Properties of Fused Quartz Properties [English, Metric, International System of Units (SI) Value] Trace Impurities Pressure Calculations Fused Quartz Proper Usage Guidelines Silica is found almost everywhere in nature, it represents almost 1/3 the mass of the earth’s crust. Vitreous Silica is the generic term used to describe all types of silica glass, with manufacturers
Now you see it, now you don’t. Glass is a bit of a riddle. It’s hard enough to protect us, but it shatters with incredible ease. It’s made from opaque sand, yet it’s completely transparent. And, perhaps most surprisingly of all, it behaves like a solid material… but it’s also a sort of weird liquid
Material hardness is commonly understood as resistance to scratching or abrasion. However, different tests are used to measure different aspects of material hardness in accordance with the mechanical properties under investigation. Moreover, tests are conducted under varying experimental conditions and data analysis methods. Consequently, no direct relationship exists between the results of different hardness tests.
At first glance, quartz crystals and glass might look identical. Although their internal structural compositions differ greatly, the average person doesn’t have the lab equipment to analyze the molecular difference between the two materials. Fortunately, there are other, simpler methods to determine whether a stone is quartz crystal or just glass. Look for Bubbles Visually
Glass Glass is an amorphous (non-crystalline) solid material. Glasses are typically brittle and optically transparent. The most familiar type of glass, used for centuries in windows and drinking vessels, is soda-lime glass, composed of about 75% silica (SiO2) with the addition of sodium oxide (Na2O) from soda ash, lime (CaO), and several minor additives. Optical
A number of unique optical, mechanical and thermal properties have made quartz glass an indispensable material in the fabrication of high-tech products. Among these are: high chemical purity and resistance, high softening temperature and thermal resistance, low thermal expansion with high resistance to thermal shocks, high transparency from the ultraviolet to the infrared spectral range,
GLASSBLOWING Obsidian, a black volcanic glass, is probably the best known of the naturally occurring glasses. It was used by early man to form cutting tools, arrowheads and spearheads and is now used by modern man to make the sharpest surgical blades. Synthetic glass was originally prepared by heating a mixture of sodium oxide (or
What is it? Scientific Glassblowing is the process of creating glass apparatus and glass systems used in research and production. Where is it found? Scientific glassware is found in many government, educational and industrial laboratories. Chemical, medical, pharmaceutical and engineering laboratories use scientific glassware extensively, and almost all areas of scientific research will use glass at some
People had used naturally occurring glass, especially obsidian (the volcanic glass) before they learned how to make glass. Obsidian was used for production of knives, arrowheads, jewelry and money. The ancient Roman historian Pliny suggested that Phoenician merchants had made the first glass in the region of Syria around 5000BC. But according to the archaeological evidence, the
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