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Graphite is mixed with clay to form refractory crucibles due to it's high melting point, inert nature and abilities to conduct heat.

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Why is graphite in pencil mixed with clay?

To make it harder. Pure graphite would be too soft for use as a writing pencil.


What mineral when mixed with clay is used to make pencil lead?

Graphite, a form of carbon


What mineral make the lead in a pencil?

Graphite is the mineral that is used to make the lead in a pencil. Despite its name, pencil "lead" is actually composed of graphite mixed with clay.


This mineral when mixed with clay is used to make pencil lead and also used for a oil?

The mineral is graphite.


What Mineral is mixed with clay it is used to make pencil lead it is also used as an oil for machines parts and as electrodes in batteries?

The mineral mixed with clay to make pencil lead is graphite. Graphite is also used as a lubricant for machine parts and as electrodes in batteries due to its ability to conduct electricity.


What mineral when mixed with clay is used to make pencil led?

Graphite is the mineral mixed with clay to make pencil lead. It provides the dark pigment needed for writing and drawing and is a popular choice for its smooth writing properties.


Why is graphite used to make crucible?

Graphite is used to make crucibles because it has a high melting point, excellent thermal conductivity, and chemical inertness, making it ideal for containing and withstanding high temperatures during melting processes. Additionally, graphite crucibles are durable, provide good heat distribution, and resist thermal shock.


Is graphite used to make pencils?

Graphite is what is put inside a pencil. The outer casing of a pencil is usually wooden.


Why can pencil lead can be used to make a light bulb?

A "pencil lead" is a mixture of the graphite allotrope of carbon mixed with clay and baked hard. While a pencil lead will conduct electricity, it can not be used to make a light bulb.


What is mixed with limestone to make cement?

it is mixed with clay to form cement.


How is lead put into pencils?

First, the 'lead' in a pencil is not lead it is a mixture of graphite (a form of carbon) mixed with clay (the more clay the 'harder' the pencil). The lead portion is extruded in a long rod and then cut into lengths. The wooden sheath is made in two halves which are glued together round the lead.


Why is carbon used in a pencil?

Carbon is used in a pencil because it leaves a mark by transferring from the pencil's graphite to the writing surface. The carbon is mixed with clay to give it structure and make it suitable for writing. The carbon in pencils is commonly referred to as graphite.