CN110044769B - Method for measuring specific gravity of hollow glass beads - Google Patents

Abstract

The invention provides a method for measuring the specific gravity of hollow glass beads, which comprises the following steps of weighing the hollow glass beads; melting the solid; measuring the volume of liquid after the solid is melted; adding hollow glass beads into the liquid, and completely immersing the hollow glass beads into the liquid after the solid is melted; measuring the volume of the combined body of the hollow glass beads and the liquid after the solid is melted; and subtracting the liquid volume from the combined volume to obtain the volume of the hollow glass microspheres, and calculating the specific gravity of the hollow glass microspheres by using the known weight of the hollow glass microspheres. The invention has the advantages of simple operation, convenient measurement, accurate measurement value and the like.

Description

Method for measuring specific gravity of hollow glass beads

The technical field is as follows:

the invention relates to a method for measuring specific gravity, in particular to a method for measuring the specific gravity of hollow glass microspheres.

Background art:

the hollow glass microspheres are hollow, tiny and vitreous spheres with the specific gravity of 0.2-1.2 g/cm³The powder has the diameter of 10-250 mu m, has the characteristics of light specific gravity, high compressive strength, high melting point, high resistivity, low thermal conductivity, small thermal shrinkage coefficient, low solubility and the like, is milky powder, and is widely used for artificial light materials.

The plum-type pycnometer is a commonly used specific gravity measuring device, and measures the volume occupied by insoluble powder by using a liquid discharge method, and then obtains the specific gravity of the powder according to the weight of the powder, wherein commonly used measuring liquids are pure water, kerosene and the like. This method is applicable in view of its principle, when the powder is to be completely immersed in the liquid, i.e., the specific gravity of the powder is greater than that of the liquid. Because the specific gravity of the hollow glass beads is light, liquid required for measurement is difficult to find, and the volume occupied by the hollow glass beads cannot be measured by directly using a liquid discharge method.

The invention content is as follows:

the invention aims to overcome the defects in the prior art and provides a method for measuring the specific gravity of hollow glass microspheres.

The application provides the following technical scheme:

the method for measuring the specific gravity of the hollow glass beads is characterized by comprising the following steps of:

step 1: preparing a beaker with volume scales and a heater correspondingly matched with the beaker, and weighing the hollow glass beads to be measured; the heater can be a flame heater or an electric heater;

step 2: adding asphalt particles into a beaker;

and step 3: heating the beaker until the temperature of the asphalt reaches 260-450 ℃, then inserting a stirrer into the beaker, and stirring the asphalt until the asphalt is in a molten state until no bubbles emerge; to discharge bubbles and volatile substances in the asphalt; the stirrer can be used for stirring the asphalt, such as manual rod stirring, electric rotary stirring and the like;

and 4, step 4: stopping stirring, not taking out the stirrer, preventing the stirrer from adhering to the asphalt to influence the measurement precision, cooling the asphalt to room temperature, and recording scale indication of a beaker to determine the volume of the asphalt at the room temperature;

and 5: re-heating the beaker until the temperature of the asphalt reaches 260-450 ℃, and then stirring;

step 6: adding weighed hollow glass microspheres while stirring; immersing the hollow glass beads into molten asphalt by stirring;

and 7: stopping stirring after the hollow glass beads are completely immersed in the asphalt of the molten mass, namely after the milky white powder is completely immersed in the black asphalt; preventing the hollow glass beads from floating out of the molten asphalt by using the viscosity of the asphalt;

and 8: stopping heating, cooling the asphalt and hollow glass bead fusion to room temperature, and then recording the scale indication of the beaker to determine the volume of the asphalt and hollow glass bead fusion at room temperature;

and step 9: and (4) subtracting the volume index obtained in the step (4) from the volume index obtained in the step (8) to obtain a difference value, namely the volume of the hollow glass beads, and then dividing the weight of the hollow glass beads into the volume of the hollow glass beads to calculate the specific gravity of the hollow glass beads.

The invention has the advantages that:

the method for measuring the specific gravity of the discharged liquid is expanded, the hollow glass beads are immersed in the asphalt melt, and the hollow glass beads are prevented from floating out by using the viscosity of the asphalt, so that the method has the advantages of simplicity in operation, convenience in measurement, accurate measured value and the like.

The specific implementation mode is as follows:

the method for measuring the specific gravity of the hollow glass beads is characterized by comprising the following steps of:

step 1: preparing a beaker with volume scales and a heater correspondingly matched with the beaker, and weighing the hollow glass beads to be measured.

Step 2: asphalt particles were added to the beaker.

And step 3: and heating the beaker by using a flame heater to ensure that the temperature of the asphalt reaches 260-450 ℃, and the asphalt is in a liquid state but does not boil in the temperature range. And then, inserting the stirring rod into the beaker, and stirring the asphalt in a manual mode to enable the asphalt to be in a molten state until no bubbles emerge, so as to discharge the bubbles and volatile substances in the asphalt.

And 4, step 4: stopping stirring, but not taking out the stirring rod, ensuring the liquid level of the asphalt to be in a horizontal state, removing the flame heater, stopping heating the beaker, then cooling the asphalt to room temperature, and recording the scale index of the liquid level of the asphalt in the beaker to determine the volume of the asphalt at the room temperature.

And 5: and re-heating the beaker until the temperature of the asphalt reaches 260-450 ℃, and then stirring to heat the asphalt to a liquid state.

Step 6: while manually stirring the asphalt solution, slowly adding the weighed hollow glass microspheres.

And 7: and after the hollow glass beads are completely immersed into the asphalt of the molten mass, namely after the milky white powder is completely immersed into the black asphalt, stopping stirring to ensure that the asphalt liquid level is kept horizontal. Because the viscosity of the asphalt liquid is larger, the hollow glass beads can not float out of the asphalt liquid after being completely immersed into the asphalt liquid.

And 8: and removing the flame heater again, stopping heating the beaker, cooling the asphalt liquid and the hollow glass bead fusion body to room temperature, and recording the scale index of the asphalt liquid surface in the beaker to determine the volume of the asphalt liquid and the hollow glass bead fusion body at room temperature.

And step 9: and (4) subtracting the volume index of the asphalt liquid obtained in the step (4) from the volume index of the fusion body of the asphalt liquid and the hollow glass beads obtained in the step (8) to obtain a difference value, namely the volume of the hollow glass beads, and then dividing the weight of the hollow glass beads into the volume of the hollow glass beads to calculate the specific gravity of the hollow glass beads.

Claims (1)

1. The method for measuring the specific gravity of the hollow glass beads is characterized by comprising the following steps of:

step 1: preparing a beaker with volume scales and a heater correspondingly matched with the beaker, and weighing the hollow glass beads to be measured;

step 2: adding asphalt particles into a beaker;

and step 3: heating the beaker until the temperature of the asphalt reaches 260-450 ℃, then inserting a stirrer into the beaker, and stirring the asphalt to ensure that the asphalt is in a molten state and no bubbles emerge;

and 4, step 4: stopping stirring, not taking out the stirrer, cooling the asphalt to room temperature, and recording scale indication of a beaker to determine the volume of the asphalt at room temperature;

and 5: re-heating the beaker until the temperature of the asphalt reaches 260-450 ℃, and then stirring;

step 6: slowly adding weighed hollow glass microspheres while stirring;

and 7: stopping stirring after the hollow glass beads are completely immersed in the asphalt of the molten mass, namely after the milky white powder is completely immersed in the black asphalt;

and 8: stopping heating, cooling the asphalt and hollow glass bead fusion to room temperature, and then recording the scale indication of the beaker to determine the volume of the asphalt and hollow glass bead fusion at room temperature;

and step 9: and (4) subtracting the volume index obtained in the step (4) from the volume index obtained in the step (8) to obtain a difference value, namely the volume of the hollow glass beads, and then dividing the weight of the hollow glass beads into the volume of the hollow glass beads to calculate the specific gravity of the hollow glass beads.