The most common materials found in the kitchen, especially storage containers and jars, are glass and ceramics. Almost every kitchen has at least a few of these jars and containers.
This is rightfully so because glass and ceramics are among the safest options for food storage. They have been a trusted part of the kitchen for time immemorial.
It often, however, happens that these two items of utmost importance in the kitchen are confusing.
They are used interchangeably without any hesitation, and there is some genuine amount of confusion regarding the two terms glass and ceramics, perhaps because they are both used mostly used in the kitchen for the same purpose and have somewhat similar properties, as far as they can be observed from the normal exterior.
Key Takeaways
- Glass is an amorphous, transparent or translucent solid substance, whereas ceramics are non-metallic, inorganic materials made by heating and cooling clay and other minerals.
- Glass has a smoother surface and is more brittle than ceramics.
- Ceramics are used for making pottery, tiles, and other building materials, while glass is used for making windows, mirrors, and other decorative items.
Glass vs Ceramics
Glass is an amorphous, transparent or translucent solid material brittle and can be formed by cooling a molten liquid. Ceramics are inorganic, non-metallic solid materials formed by heating a mixture of clay, minerals, and other substances to high temperatures in a kiln.
Comparison Table
| Parameter of Comparison | Glass | Ceramics |
|---|---|---|
| Nature | Glass is non-crystalline and amorphous. | Ceramics can be crystalline or semi-crystalline in nature but never non-crystalline. They are inorganic materials. |
| Composition | The main component of glass is silicon dioxide. | The main component of ceramics is clay. |
| Transparency | Glass is almost always transparent unless tampered with to make it look otherwise. It can be made to look translucent or opaque too, but naturally, glass is transparent. | Ceramics are opaque. Light cannot pass through them. |
| Price | Glass is cheaper than ceramics in comparison. | Ceramics are costlier than glass. |
| Reaction on Heating | On heating to high temperatures, glass exhibits behaviour like rubber. | Ceramics do not behave like rubber or show such properties when heated to very high temperatures. Instead, they harden when exposed to high temperatures. |
What is Glass?
Glass is defined as a non-crystalline amorphous solid. It has no long-range periodic atomic structure. Glass is mostly used in the kitchen to store food.
It is safe for that purpose as it is one of the most non-reactive substances.
Glass naturally occurs when high temperatures like lava or lightning react with sand. But glass is also manufactured in kilns.
The main component for manufacturing glass is silicon dioxide. When the manufacturing process is completed, the result is a beautiful transparent shining jar or container.
Glass is normally transparent, allowing light to pass through itself. Glass can also be made translucent or opaque, but in its natural and simplest form, it is transparent.
This is also a quality which adds to its beauty and attractions.
When heated to high temperatures, glass behaves like rubber. It flows to some extent. Glass also tends to flow, albeit very slowly and over time.
This can be very evident in old glass windows. Glass is easily available and thus not very expensive.
What are Ceramics?
The term “ceramics” refers to storage containers, utensils available in the kitchen, and sometimes to certain show pieces. It is very easy to notice. It can be defined as a crystalline, inorganic substance.
Its main use is in the kitchen because it is a very safe and ancient method of storing food. Ceramics are of many kinds, the earliest of which were in the field of pottery.
Ceramics are manufactured in the kiln, and their main component is clay.
Ceramics are opaque since their main component is clay. Light cannot pass through them, and they cast a shadow. Ceramics have an antique and vintage look, making them a great choice for some aesthetics.
Ceramics harden when heated to high temperatures. They are costly and need to be handled with care.
Main Differences Between Glass and Ceramics
- Glass is an amorphous and non-crystalline solid, while ceramics, on the other hand, are inorganic and can be crystalline or semi-crystalline but never non-crystalline.
- The main component of glass, most required while manufacturing, is silicon dioxide, while clay is the main component of ceramics required mostly for its manufacture.
- Glass is transparent; it allows light to pass through it, while ceramics are opaque. Glass can be altered to make it translucent or even opaque, but in its natural and unaltered form, glass is transparent. Ceramics are always opaque and can never be transparent.
- Glass is cheaper as compared to ceramics. It is very easily available and thus not so pricey. Ceramics are costlier than glass and are rarer to find these days.
- When heated to high temperatures, glass behaves like rubber, meaning it sometimes flows and melts as a thick liquid. However, ceramics, when heated to high temperatures, tend to harden, unlike glass.
- https://www.sciencedirect.com/science/article/pii/S0109564103001489
- https://www.osti.gov/biblio/5773942
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Piyush Yadav has spent the past 25 years working as a physicist in the local community. He is a physicist passionate about making science more accessible to our readers. He holds a BSc in Natural Sciences and Post Graduate Diploma in Environmental Science. You can read more about him on his bio page.
