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How is cinnabar used in ceramics?
First, we must define cinnabar. Real cinnabar is mercury sulfide. It isn't used in pottery. It is extremely toxic and decomposes at 580 C (well below kiln temperatures). However, what is called cinnabar glaze is a deep red stoneware glaze, and fairly non-toxic (although like any glaze, the dust can be harmful).
Where can one find more information about unpainted ceramics?
One can find more information about unpainted ceramics at a local Rona hardware store. At Rona, they sell many painting tools, which include unpainted ceramics.
Can you fire a ceramic piece for a second time with another glaze that has already been fired once with glaze?
yes , u can put many laries of glazes over each other but u must know the firing temprature for each one and its chemical analysis To determine the outcome
Can you use more than one type of glaze on each clay pot?
Yes you can.
When was ceramics first used?
Stone Age man was the first to use ceramics. The earliest evidence is dated to 25,000 years ago. See the following link for more details. http://www.geopolymer.org/news/25000-years-old-a-geopolymer-ceramic
What are the characteristics of ceramics?
Physical properties means the behavior of materials in response to physical forces other than mechanical, such as; Volumetric, thermal, electric and electrochemical properties. Most Ceramics are lighter than metals but heavier than polymers. Most ceramics have a higher melting point than most metals as it is that some ceramics such as China can with stand high temperatures to about 1200 degrees centigrade. Ceramics also has lower Electrical and Thermal Conductivity than most metals but the range of value is greater in ceramics permitting some ceramics to be used as insulators, for example Porcelain insulators and others as conductors like Lithium-ion conducting glass-ceramics and oxide ceramics. Thermal expansion is another physical property of ceramics, Ceramic thermal expansion coefficients are less than those of metals but effects are more damaging in ceramics bringing about cracks and other failures(Thermal shock and thermal cracking) as for ceramic materials with relatively high thermal expansion and low thermal conductivity however there is glass ceramics that has low thermal expansion thus resisting thermal shock and thermal cracking, for example Pyrex glass ceramics. Thus the physical properties being but not limited to permeability, elasticity, considerable strength, hardness, brittleness, resistance to chemical attack and thermal shock.
What is thermal growth?
Thermal growth is more commonly known as thermal expansion. It is the tendency of matter to change in volume in response to a change in temperature.
What is the thermal expansion coefficient for monel?
Thermal expanasion coefficient fro monel is 0,0000075 m/mºC. More info at http://www.engineeringtoolbox.com/linear-expansion-coefficients-d_95.html
What is thermal expansion and contraction of matter?
Thermal expansion will occur in just about all of the 15 or more phases of matter: whether it be solid, liquid, gas, etc.
Do ceramics conduct electricity?
Certain types of ceramics like chromium dioxide, conduct electricity just like metals do. Silicon carbide is a semi-conductor. However, there are also other types of ceramics like aluminum oxide do not conduct electricity at all.
What is better the one having less or more Thermal Expansion Coefficient?
Depends on your application. The Thermal Expansion Coefficient is a number which represents how much a material will physically expand with an increase in temperature. If you want it to grow as it heats, it is the better material.
Why is stainless steel more likely to suffer from distortion than carbon steels?
high thermal expansion
How is thermal expansion being affected by temperature?
Thermal Expansion is being affected by temperature because the substance's temperature increases and therefore it makes the particles move faster and spread out. Also, it causes more space between the particles which then makes the substance expand. Alcohol in a thermometer is expanding and that is also caused by Thermal Expansion. Not only that but, Mercuy is also used in thermometers which again like I said before is caused by Thermal Expansion which to then makes the thermometer expand the red liquid.
Where can one learn more about thermal expansion coefficient?
Thermal expansion coefficient is how matter reacts to temperature, one of the best places to find information for free is at your local library in the encyclopedia or online in a few places, Wikipedia is often a good source for research, there are also various engineering sites that will show up from searching the words "thermal expansion coefficient" that will give the information,
What does thermal expansion of water mean and why is it relevant to the rising sea levels?
Thermal expansion relates to how things expand when they heat up and contract when they cool down. This also applies to the water in the ocean. The hotter it is, the more it expands, making sea levels rise.
What happens to the density of the substance during thermal expansion?
Thermal expansion is the tendency of matter to change in volume in response to change in temperature. During thermal expansion, the density of a substance decreases as its volume increases. Volume is the space occupied by a body. So, when a substance expands on heating, it will occupy more space or will have more volume. But its mass does not change because the amount of matter contained in a body cannot change. Therefore, mass divided by increased volume gives a decreased density.
What happens to density of a substance during thermal expansion?
Thermal expansion is the tendency of matter to change in volume in response to change in temperature. During thermal expansion, the density of a substance decreases as its volume increases. Volume is the space occupied by a body. So, when a substance expands on heating, it will occupy more space or will have more volume. But its mass does not change because the amount of matter contained in a body cannot change. Therefore, mass divided by increased volume gives a decreased density.
