High Quality Borosilicate Glass Stirring Rods 5mm/6mm/7mm
Borosilicate Glass Stirring Rods is a kind of glass instrument. It can be used to stir and accelerate solute dissolution, drain during filtration, and also to evaporate and crystallize small amounts of solution.
Cut the glass rod into the required length, place the cut end on the fire and burn it round to form a stirring rod. Note that beakers of different sizes should be matched with stirring rods of appropriate length and diameter. The length of the stirring rod is generally 1.5 times the height of the beaker.
Product Specification
Diameter
|
Length
|
5/6mm
|
100mm
|
5/6mm
|
150mm
|
5/6mm
|
200mm
|
5/6mm
|
250mm
|
5/6mm
|
300mm
|
7mm
|
200mm
|
7mm
|
250mm
|
7mm
|
300mm
|
7mm
|
400mm
|
7mm
|
500mm
|
Product Parameters
Product Name: Glass Rod
Diameter: 3mm, 4mm, 5mm, 6mm
Length：200-300
Material: High borosilicate glass
Main components: Silicon dioxide
Physical properties: high hardness, high melting point, insoluble in water, colorless and transparent
Chemical properties: Inactive, does not react with water, does not react with acids (except HF)
Caution: Fragile, use with caution
Usage: Stirring solution
The main function of a glass stirring rod
1) Stirring: Glass stirring rods are essential tools in chemical experiments, mainly used to accelerate the dissolution of solutes and mix liquids. When using, excessive force should be avoided to prevent the glass rod from breaking or the container from breaking. At the same time, the mixing direction should be consistent to avoid collision with the container wall and bottom, in order to prevent the liquid from splashing due to local heating.
2) Filtering: In the filtering operation, a glass stirrer is used to guide the suspension to be filtered onto the filter paper in the funnel, ensuring that the liquid passes smoothly through the filter paper while solid impurities remain on the filter paper.
3) Drainage: During solution preparation or transfer, a glass stirrer is used to guide the solution from the beaker to the volumetric flask, ensuring smooth flow of the solution and avoiding liquid splashing.
In addition, glass stirring rods are usually made of glass, mainly composed of silicon dioxide, which has corrosion resistance and is suitable for various chemical experiments and environments.
Attentions:
① Do not apply too much force when stirring to prevent the glass rod or container (such as a beaker) from breaking.
② Do not collide with the container wall or bottom during mixing, and do not make any noise.
③ When stirring, it is necessary to stir in one direction (clockwise or counterclockwise).
Physical and chemical properties of Borosilicate Glass
Borosilicate
glass has a very low coefficient of thermal expansion, about one-third
of that of ordinary glass, which will reduce the impact of temperature
gradient stress and thus have stronger fracture resistance. Due to its
very small shape deviation, it becomes an essential material in
telescope reflectors. It can also be used to process highly radioactive
nuclear waste.
Borosilicate glass begins to soften at approximately 821℃ (1510℉).
Borosilicate glass is less dense than ordinary glass.
Although
borosilicate glass has better thermal vibration resistance than other
types of glass, it can still break due to rapid or uneven temperature
changes. When broken, the cracks in borosilicate glass are often larger
than crushed.
In terms of
optical performance, borosilicate glass has low dispersion (about 65
Abbe coefficient) and relatively low refractive index (the entire
visible light range is 1.51-1.54)
The
linear expansion coefficient of high borosilicate glass is
3.3±0.1X10-6/K, which is a type of glass composed mainly of sodium oxide
(Na2O), boron oxide (B202), and silicon dioxide (SIO2). This type of
glass has a high content of boron and silicon, with boron content
ranging from 12.5% to 13.5% and silicon content ranging from 78% to 80%.
Therefore, it is called high boron silicon glass. PYREX glass belongs
to borosilicate glass. It is acid resistant, alkali resistant, and water
resistant, with superior corrosion resistance and good thermal
stability, chemical stability, and electrical performance. Therefore, it
has characteristics such as resistance to chemical erosion, thermal
shock, good mechanical properties, and high temperature resistance.
