chemistry

Nickel sulfide inclusion

Nickel sulfide inclusion is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Nickel sulfide inclusion rather than just read about it. In short: A nickel sulfide inclusion, also abbreviated to NiS, occurs during the process of manufacturing float glass (normal window glass). Occurrence In a batch of glass, contaminants that contain nickel might be present (e.g. stainless steel.) These can combine with sulfur to form nickel sulfide inclusions.

Key takeaways

Nickel sulfide inclusion belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Nickel sulfide inclusion to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Nickel sulfide inclusion from memory before moving on to harder problems.

Reference excerpt

A nickel sulfide inclusion, also abbreviated to NiS, occurs during the process of manufacturing float glass (normal window glass).

Occurrence In a batch of glass, contaminants that contain nickel might be present (e.g. stainless steel.) These can combine with sulfur to form nickel sulfide inclusions. Furnaces produce hundreds of tons of glass every day, so it is difficult to eliminate all contaminants. This causes a problem later in the manufacturing process. While total elimination is difficult, specific controlled processes can significantly reduce the formation of NiS in the float glass. These are actions taken by US flat glass manufacturers supplying to the automotive industry in the early 1990s:

all green sand (silica, transported by railroads from Wyoming USA) shipments were processed through multiple screens (to filter out any nickel bearing materials, either mineral or stainless steel tools, nuts, bolts, washers) since stainless steel cannot be detected by magnets. all other bulk materials including recycled glass were inspected similarly to the point above. every maintenance procedure and all training was very focused on the need for every worker to prevent contamination of the float furnace or the float glass tank with NiS. use of any nickel containing tool or material anywhere in the Ford Glass float facility was closely controlled to prevent contamination. any float glass suspected to have NiS (it could only be found with a Scanning Electron Microscope) was destroyed and landfilled as it could not be re-introduced to glass used for any purpose. The process of tempering float glass can cause a NiS to change from its normal state (known as a low-temperature structure) to a different high-temperature, crystalline structure. When the glass is cooled quickly (as part of the process) the NiS particle is unable to change back to its original form. Over a certain period of time NiS will slowly convert to the original low temperature structure. This means the NiS increases in size, and the mechanical stresses caused by this cause the tempered pane to shatter, for no apparent reason (hence spontaneous glass breakage).

References

Illustrations

Worked examples

Example 1 — a first encounter with Nickel sulfide inclusion

Start with the simplest possible case. Write down what Nickel sulfide inclusion claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Nickel sulfide inclusion before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Nickel sulfide inclusion ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Nickel sulfide inclusion

In research: Nickel sulfide inclusion appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Nickel sulfide inclusion in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Nickel sulfide inclusion is common in secondary-school and first-year university syllabi. It links to neighbouring topics Glass chemistry, Glass engineering and science, so understanding it makes those chapters shorter.
In everyday life: Look for Nickel sulfide inclusion outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Nickel sulfide inclusion in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Nickel sulfide inclusion means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Nickel sulfide inclusion out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Nickel sulfide inclusion in simple terms?

A nickel sulfide inclusion, also abbreviated to NiS, occurs during the process of manufacturing float glass (normal window glass). Occurrence In a batch of glass, contaminants that contain nickel might be present (e.g. stainless steel.) These can combine with sulfur to form nickel sulfide inclusion…

Why does Nickel sulfide inclusion matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Nickel sulfide inclusion?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Nickel sulfide inclusion.