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A melting-point apparatus is a scientific instrument used to determine the melting point of a substance. Some types of melting-point apparatuses include the Thiele tube , Fisher-Johns apparatus, Gallenkamp (Electronic) melting-point apparatus and automatic melting-point apparatus.
The Thiele tube, named after the German chemist Johannes Thiele, is a laboratory glassware designed to contain and heat an oil bath. Such a setup is commonly used in the determination of the melting point or boiling point of a substance. The apparatus resembles a glass test tube with an attached handle.
cloud point (nonionic surfactants) hardness; melting point; solids or dissolved solids; salinity; specific gravity; density; turbidity; viscosity; moisture (Karl Fischer titration) Wet chemistry is also used in environmental chemistry settings to determine the current state of the environment. It is used to test: [citation needed] Biochemical ...
Compared to other fluoropolymers, it has an easier melt process because of its relatively low melting point of around 177 °C. Processed materials are typically in the non-piezoelectric alpha phase. The material must either be stretched or annealed to obtain the piezoelectric beta phase.
Uses include warming of reagents, melting of substrates, determination of boiling point, or incubation of cell cultures. It is also used to enable certain chemical reactions to occur at high temperature.
The temperature in which the particles are sintered is most commonly below the melting point of the main component in the powder. [24] If the temperature is above the melting point of a component in the powder metal part, the liquid of the melted particles fills the pores. This type of sintering is known as liquid-state sintering. [6]
The melting point (or, rarely, liquefaction point) of a substance is the temperature at which it changes state from solid to liquid. At the melting point the solid and liquid phase exist in equilibrium. The melting point of a substance depends on pressure and is usually specified at a standard pressure such as 1 atmosphere or 100 kPa.
A starting tube is extruded from the raw material. Next, the tube is taken to a separate process where it is cross-linked, usually through radiation. The cross-linking creates a memory in the tube. Then the tube is heated to just above the polymer's crystalline melting point and expanded in diameter, often by placing it in a vacuum chamber ...