CN111517648A - Preparation method of water-based glass glaze and resistor disc - Google Patents
Preparation method of water-based glass glaze and resistor disc Download PDFInfo
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- CN111517648A CN111517648A CN202010386694.2A CN202010386694A CN111517648A CN 111517648 A CN111517648 A CN 111517648A CN 202010386694 A CN202010386694 A CN 202010386694A CN 111517648 A CN111517648 A CN 111517648A
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/04—Apparatus or processes for treating or working the shaped or preshaped articles for coating or applying engobing layers
- B28B11/044—Apparatus or processes for treating or working the shaped or preshaped articles for coating or applying engobing layers with glaze or engobe or enamel or varnish
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5022—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with vitreous materials
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- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/86—Glazes; Cold glazes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/105—Varistor cores
- H01C7/108—Metal oxide
- H01C7/112—ZnO type
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Abstract
The invention belongs to the technical field of electrical ceramics, and particularly relates to a preparation method of water-based glass glaze and a resistor disc, wherein the preparation method comprises the following steps: (1) mixing glass powder, deionized water and a water-based dispersant according to a mass ratio, and performing ball milling and sieving on the mixed components to obtain water-based glass glaze slurry; (2) preheating a workpiece to be glazed, and coating the water-based glass glaze slurry obtained in the step (1) on the workpiece to be glazed after preheating; (3) and after the surface of the glaze layer of the workpiece is dried, annealing the workpiece, namely forming the water-based glass glaze on the surface of the workpiece. The preparation process has the advantages of simple process, low carbon, environmental protection, low coating cost and easy recycling of old materials. The obtained insulating glaze is compact and uniform, can resist square waves and large current impact, and has good waterproofness, antifouling property and high insulativity. Meanwhile, the appearance is smooth, the glossiness is good, and the beauty of the resistance card product can be improved.
Description
Technical Field
The invention belongs to the technical field of electrical ceramics, and particularly relates to a preparation method of water-based glass glaze and a resistor disc.
Background
The ZnO varistor is a functional ceramic electronic component, has unique nonlinear I-V characteristics and surge voltage impact energy absorption capacity, and the performance quality degree directly influences the protection level of the lightning arrester. The flashover accident of the lightning arrester can cause large-area discharge of a high-voltage power grid, and the safe operation of the power grid is directly threatened. The insulating glaze on the side surface of the resistance chip can improve the capability of resisting steep-wave large-current impact and solve the flashover problem to a greater extent. According to the literature reports, at present, three side insulating glaze protection methods, namely a coating method, a plasma spraying method and a gas-solid reaction method, are mainly adopted. The coating method is most widely applied, and the method is to directly coat organic glaze (epoxy resin and polyimide) and inorganic glaze on the side surface of the resistor or add an organic insulating layer on the surface of the inorganic high-resistance layer.
The epoxy type organic glaze is a common side insulating material for the resistance card, has good forming characteristic and chemical stability, has small shrinkage and water absorption, and can improve the side insulating strength of the resistance card to a certain extent. However, epoxy resins have poor temperature resistance and carbonization occurs at temperatures above 150 ℃. The ZnO varistor can be easily separated from the ZnO varistor after being subjected to thermal shock, the glaze layer falls off, and the electrical insulation performance is deteriorated. The electrical performance of the arrester is seriously affected.
The inorganic glaze has good binding force with ZnO, has the performances of aging resistance, arc resistance, corona resistance and the like, and is generally prepared from PbO and SiO2、ZnO、Bi2O3、Sb2O3ZnO, etc. through a certain preparation process and a green part of ZnO resistance card(or after pre-sintering) the raw materials are sintered together at low temperature to form the ceramic material. The application range of the resistor disc can be greatly expanded. However, the inorganic insulating glaze prepared by the traditional method has the problems of insufficient large-current impact resistance, complex preparation process, environmental pollution, high cost and the like.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a preparation method of a water-based glass glaze and a resistor disc.
The technical scheme adopted by the invention is as follows: a preparation method of water-based glass glaze comprises the following steps:
(1) mixing glass powder: deionized water: mixing the aqueous dispersant 1000: 600 and 1000: 2-15, and performing ball milling and sieving on the mixed components to obtain water-based glass glaze slurry;
(2) carrying out preheating treatment on a workpiece to be glazed, and coating the water-based glass glaze slurry obtained in the step (1) on the workpiece to be glazed after preheating is finished;
(3) and after the surface of the glaze layer of the workpiece is dried, annealing the workpiece, namely forming the water-based glass glaze on the surface of the workpiece.
In the step (1), the aqueous dispersant is A4040, D134 or ethanol. The dispersing agent is mainly used for stabilizing the dispersion of the glass powder, preventing particles from aggregating with each other and settling, and improving the dispersion stability and grinding uniformity.
In the step (1), the ball milling time is 24-48 h, and the ball milling speed is 300-500 r/min.
The sieving is carried out by adopting a 100-200-mesh sieve.
In the step (1), the viscosity of the sieved water-based glass glaze slurry is 1500-2500mPa.S, and the particle size D50 is less than or equal to 15.0 μm.
The temperature of the preheating treatment in the step (2) is 80-180 ℃, and the time of the preheating treatment is 30-90 minutes of heat preservation.
The spraying weight range in the step (2) is controlled to be 0.1-0.5g/cm2。
The annealing temperature of the annealing treatment in the step (3) is 480-530 ℃, and the heat preservation time of the annealing treatment is 2-4 h.
The water-based glass glaze prepared by the preparation method of the water-based glass glaze is arranged on the resistor disc.
The resistance card is a ZnO resistance card.
The invention has the following beneficial effects: the invention provides a simple preparation method of the water-based glass glaze, the preparation process has the advantages of simple process, low carbon, environmental protection, low coating cost and easy recycling of old materials. The insulating glaze formed on the resistor chip by the method is compact and uniform, can resist square wave and large current impact, and has good waterproofness, antifouling property and high insulativity. Meanwhile, the appearance is smooth, the glossiness is good, and the beauty of the resistance card product can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.
FIG. 1 is a schematic structural view of an automatic coating apparatus;
FIG. 2 is a schematic structural view of a feeding device part;
FIG. 3 is a schematic structural view of a part of a spray gun apparatus, a working line and a loading and unloading mechanism;
FIG. 4 is a schematic flow chart of the present invention;
in the figure, 1, a material tank; 101, a feed back port; 2, a stirring device; 3, a discharging device; 4, discharging a pipe; 5, a spray gun; 6, a spray gun bracket; 7, a gas storage tank; 8, an air pipe; 9, a working line; 10, a loading and unloading mechanism; 11, a working position; 12, a feed back pipe; 13, a spray gun control device; 14, air draft dust removal equipment; 15, a main disc transmission mechanism; and 16, an operating line control box.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
The terms of direction and position of the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer to the direction and position of the attached drawings. Accordingly, the use of directional and positional terms is intended to illustrate and understand the present invention and is not intended to limit the scope of the present invention.
The invention realizes the coating of the water-based glass glaze slurry on the resistor sheet by automatic spraying equipment.
As shown in fig. 1, the automatic spraying equipment comprises a material conveying device, a spray gun device, a working line 9, a loading and unloading mechanism 10 and a control mechanism; the material conveying device comprises a material tank 1, a stirring device 2 arranged in the material tank 1, a discharging device 3 connected with the material tank 1 and a discharging pipe 4; the spray gun device comprises a spray gun 5 connected with a discharge pipe 4, a spray gun bracket 6 used for fixing the spray gun 5, an air storage tank 7 used for providing required air pressure for spraying the spray gun 5 and an air pipe 8 used for connecting the air storage tank 7 and the spray gun 5; the working line 9 is used for transporting and positioning workpieces to be sprayed; the loading and unloading mechanism 10 is used for placing a workpiece to be sprayed on the working line 9 and taking the workpiece after spraying off the working line 9; the control mechanism is connected with the discharging device 3, the spray gun device, the working line 9 and the loading and unloading mechanism 10. Specifically, the operating line control box is connected to the operating line 9 and the attachment/detachment mechanism 10, and the spray gun control device 13 controls the spray gun device.
Specifically, the working line 9 is a rotary table, at least two working positions 11 are arranged on the working line 9, the loading and unloading mechanism 10 and the spray gun 5 respectively correspond to two of the working positions of the working line 9, and when the spray gun 5 performs spraying work on one of the working positions 11, the loading and unloading mechanism 10 can perform loading and unloading work on the other working position 11;
the working line 9 is provided with a first rotary driving device and a braking device, the first rotary driving device drives the working line 9 to rotate through the main disc transmission mechanism 15, and the braking device is used for braking to stop the working line 9 when the working position 11 rotates to a target position.
The working line 9 is of a circumferential rotation type, in this embodiment, 6 groups of working positions are arranged on the working line 9, and after the resistor disc on one working position is sprayed, the working disc is rotated to automatically rotate the workpiece group which is not sprayed to the working position aligned with the spray gun 9, and the spray gun task of the next workpiece group is continued. Therefore, the work on the production line is continuously continued in cycles. The loading and unloading mechanism 10 unloads the workpiece aligned with the working position of the loading and unloading mechanism 10 and places a new workpiece which is not sprayed. Due to the inertia of the rotation of the working line, when the working line rotates to a required position, the braking device is started to brake the working disc, and the workpiece is ensured to be accurately aligned to the spray gun 9. The working line 9 can also adopt a belt-shaped production line for fixing and transporting workpieces, so that the loading and unloading mechanism 10 needs to be separated into an installation mechanism and a loading and unloading mechanism which are respectively arranged at the head end and the tail end of the belt-shaped production line.
At least two groups of spray guns 5 are arranged on the spray gun support 6, and at least two groups of workpieces can be fixed on each working position 11. The work efficiency is higher. In the present embodiment, three sets of spray guns 5 are used and three sets of workpieces are fixed on the work station 11.
Each work station 11 is composed of a positioning disc for fixing a workpiece and a second rotary driving device for driving the workpiece to rotate, when the position of the work station 11 corresponds to the spray gun 5 and the spray gun 5 to perform spraying work, the second rotary driving device drives the workpiece to rotate, and when the position is not in a spraying position, the second rotary driving device stops working. The working positions rotate at the spraying position, so that the water-based glass glaze is uniformly sprayed on the side surface of the resistor disc and keeps static at the non-spraying position, and the water-based glass glaze is used for ensuring the loading and unloading of workpieces and performing thermal solidification on the glass glaze on the sprayed workpieces.
The spray gun support 6 is provided with an up-and-down reciprocating driving device, the up-and-down reciprocating driving device is used for driving the spray gun 5 to move up and down and back and forth relative to the working line 9, and the distance between the spray gun 5 and a workpiece to be sprayed is controlled within 100-150 mm. The reciprocating times of the up-and-down movement are counted by a self-induction mode for the reciprocating spraying times, and the required reciprocating times of the operation can be set according to actual needs. Thereby realizing controllable glass glaze spraying quality range.
The up-and-down reciprocating driving device comprises a mechanical guide rail and an electromagnetic reversing valve.
The device further comprises a spray gun control device 13, and the spray gun control device 13 is used for controlling the air pressure, the spraying angle and the sweeping range of the spray gun 5.
The spray gun is a Binly BL-68HVLP spray gun, the air pressure is controlled to be about 0.7mPa under the action of the spray gun control device 13, the working air pressure of the three spray guns is controlled to be 0.4mPa, the height of the set station is below 160mm, and the distance between the side surface of the workpiece to be sprayed and the muzzle of the spray gun is controlled to be 150 mm. Starting an automatic spraying program, uniformly spraying the three groups of spray guns 9 to the surface of the resistance card workpiece in a spraying mode, and adjusting the angle of the spraying amplitude and the scanning range according to the spraying requirement. Under the control of the electromagnetic directional valve, the three groups of spray guns 5 move up and down along the spray gun bracket 6 in a reciprocating manner, the movement stroke can be adjusted according to the requirement, the movement speed (namely the spraying speed) can realize fast and slow spraying through throttling control, and the spraying distance between the three groups of spray guns 5 and a workpiece is adjusted in a mechanical guide rail manner. The reciprocating times of the up-and-down movement are counted by a self-induction mode for the reciprocating spraying times, and the required reciprocating times of the operation can be set according to actual needs. After the reciprocating spraying times reach the preset times, the spray gun device automatically stops, and the working line 9 automatically rotates to the next workpiece group, so that the controllable spraying quality range of the glass glaze is realized.
And a material return port 101 is arranged on the material tank 1, and the material return port 101 is connected with the spray gun 5 through a material return pipe 12 and used for collecting excess materials. After the spraying operation is finished, the residual glass glaze slurry returns to the stirring barrel through the material return port 101 through the material conveying pipe, and the residual glass glaze slurry can be recycled.
The stirring device 2 can carry out speed-adjustable vortex-shaped stirring on the slurry. The stability of the viscosity of the glass glaze slurry is ensured, the glass glaze slurry is stirred in a speed-adjustable vortex shape, and the dynamic circulation state of the slurry is kept.
Agitating unit 2 is hollow, discharging device 3 includes the automatic pumping, under the effect of automatic pumping, and proportional distribution evenly carries to three group's spray guns 5 through discharging pipe 4.
And an air draft dust removing device 14 is arranged above the working line 9. The spraying quality of the glass glaze can be improved, and the influence of dust, dust and the like on the environment and the health of people can be reduced.
The following is a specific example of preparing glass glaze on a ZnO resistor chip.
The first embodiment is as follows:
(1) mixing 1000g of glass powder, 1000g of water and 40403g of a dispersing agent A according to mass ratio, adding the mixed slurry and agate grinding balls into a polyurethane grinding tank according to the mass ratio of 2:1, cleaning up the sealing position of the tank opening, placing a nylon cover into the tank opening (paying attention to whether the position of a sealing ring of the nylon cover is clamped into a sealing groove), placing a stainless steel cover, and screwing bolts. And (3) placing the assembled ball milling tank on a rolling shaft of a ball mill, starting the ball mill, and setting the ball milling speed of 400r/min within 24 hours. After the ball milling is finished, a 200-mesh screen is adopted for processing, and large particles and a small amount of foam which are not ground and refined are removed. And measuring the viscosity and the granularity of the prepared water-based glass glaze slurry, wherein the viscosity is controlled to be 1500-2500mPa.S, and the granularity D50 is controlled to be less than or equal to 15.0 mu m.
(2) And (3) checking that the side surface of the end face of the resistance card to be sprayed has no defects such as padding, particles, floating powder and the like, and preheating the resistance card for 30min at the temperature of 150 ℃.
(3) After preheating, stacking the resistor disc on a spraying station, starting an air draft dust removal system, and uniformly spraying glass glaze slurry on the side surface of the resistor by adopting automatic spraying equipment, wherein the spraying weight is about 0.4g/cm2. In order to ensure the stability of the viscosity of the slurry, the adjustable-speed vortex stirring is carried out in the spraying process, the dynamic circulation state of the slurry is kept, and the deposition of the slurry is avoided. And sorting out unqualified products produced in the spraying process, scraping off the glaze layer, and preheating and spraying the glass glaze again.
(4) And after the surface of the glaze layer is dried, putting the sprayed resistor disc into a sagger, checking whether the glass glaze layer of the resistor disc falls off or whether the middle of the resistor disc is adhered or not, and the like, and after the resistance is checked to be qualified, putting the resistor disc into a high-temperature furnace for heat treatment at 500 ℃ for 2 hours. The resistance card with smooth surface and high insulating property can be prepared. See table 1.
Example two:
the embodiment provides a preparation method and application of a water-based glass glaze. The preparation method comprises the following preparation process steps:
(1) according to the mass calculation, the following components and compositions are mixed according to 1000g of glass powder, 1000g of water and 40405g of dispersing agent A, the mixed slurry and agate grinding balls are added into a polyurethane grinding tank according to the mass ratio of 2:1, the sealing position of the tank opening is cleaned, a nylon cover is placed into the tank opening (whether the position of a sealing ring of the nylon cover is clamped into a sealing groove is noticed), a stainless steel cover is placed, and a bolt is screwed down. And (3) placing the assembled ball milling tank on a rolling shaft of a ball mill, starting the ball mill, and setting the ball milling speed of 400r/min within 24 hours. After the ball milling is finished, a 200-mesh screen is adopted for processing, and large particles and a small amount of foam which are not ground and refined are removed. And measuring the viscosity and the granularity of the prepared water-based glass glaze slurry, wherein the viscosity is controlled to be 1500-2500mPa.S, and the granularity D50 is controlled to be less than or equal to 15.0 mu m.
(2) And (3) checking that the side surface of the end face of the resistance card to be sprayed has no defects such as padding, particles, floating powder and the like, and preheating the resistance card for 30min at the temperature of 150 ℃.
(3) After preheating, stacking the resistor disc on a spraying station, starting an air draft dust removal system, and uniformly spraying glass glaze slurry on the side surface of the resistor by adopting automatic spraying equipment, wherein the spraying weight is about 0.4g/cm2. In order to ensure the stability of the viscosity of the slurry, the adjustable-speed vortex stirring is carried out in the spraying process, the dynamic circulation state of the slurry is kept, and the deposition of the slurry is avoided. And sorting out unqualified products produced in the spraying process, scraping off the glaze layer, and preheating and spraying the glass glaze again.
(4) And after the surface of the glaze layer is dried, putting the sprayed resistor disc into a sagger, checking whether the glass glaze layer of the resistor disc falls off or whether the middle of the resistor disc is adhered or not, and the like, and after the resistance disc is checked to be qualified, putting the resistor disc into a glue discharging furnace to carry out heat treatment at 500 ℃ for 2 hours. The resistance card with smooth surface and high insulating property can be prepared. See table 1.
Example three:
the embodiment provides a preparation method and application of a water-based glass glaze. The preparation method comprises the following preparation process steps:
(1) according to the mass calculation, the following components and compositions are mixed according to 1000g of glass powder, 1000g of water and 40403g of dispersing agent A, the mixed slurry and agate grinding balls are added into a polyurethane grinding tank according to the mass ratio of 2:1, the sealing position of the tank opening is cleaned, a nylon cover is placed into the tank opening (whether the position of a sealing ring of the nylon cover is clamped into a sealing groove is noticed), a stainless steel cover is placed, and a bolt is screwed down. And (3) placing the assembled ball milling tank on a rolling shaft of a ball mill, starting the ball mill, and setting the ball milling speed of 400r/min within 24 hours. After the ball milling is finished, a 200-mesh screen is adopted for processing, and large particles and a small amount of foam which are not ground and refined are removed. And measuring the viscosity and the granularity of the prepared water-based glass glaze slurry, wherein the viscosity is controlled to be 1500-2500mPa.S, and the granularity D50 is controlled to be less than or equal to 15.0 mu m.
(2) And (3) checking that the side surface of the end face of the resistance card to be sprayed has no defects such as padding, particles, floating powder and the like, and preheating the resistance card for 30min at the temperature of 150 ℃.
(3) After preheating, stacking the resistor disc on a spraying station, starting an air draft dust removal system, and uniformly spraying glass glaze slurry on the side surface of the resistor by adopting automatic spraying equipment, wherein the spraying weight is about 0.5g/cm2. In order to ensure the stability of the viscosity of the slurry, the adjustable-speed vortex stirring is carried out in the spraying process, the dynamic circulation state of the slurry is kept, and the deposition of the slurry is avoided. And sorting out unqualified products produced in the spraying process, scraping off the glaze layer, and preheating and spraying the glass glaze again.
(4) And after the surface of the glaze layer is dried, putting the sprayed resistor disc into a sagger, checking whether the glass glaze layer of the resistor disc falls off or whether the middle of the resistor disc is adhered or not, and the like, and after the resistance is checked to be qualified, putting the resistor disc into a high-temperature furnace for heat treatment at 520 ℃, and keeping the temperature for 2 hours. The resistance card with smooth surface and high insulating property can be prepared.
Example four:
(1) according to the mass calculation, the following components and compositions are mixed according to 1000g of glass powder, 800g of water and D1345 g of a dispersing agent, the mixed slurry and agate grinding balls are added into a polyurethane grinding tank according to the mass ratio of 2:1, the sealing position of the tank opening is cleaned, a nylon cover is placed into the tank opening (whether the position of a sealing ring of the nylon cover is clamped into a sealing groove is noticed), a stainless steel cover is placed, and a bolt is screwed down. And (3) putting the assembled ball milling tank on a rolling shaft of a ball mill, starting the ball mill, and setting the ball milling speed of 450r/min within 24 hours. After the ball milling is finished, a 200-mesh screen is adopted for processing, and large particles and a small amount of foam which are not ground and refined are removed. And measuring the viscosity and the granularity of the prepared water-based glass glaze slurry, wherein the viscosity is controlled to be 1500-2500mPa.S, and the granularity D50 is controlled to be less than or equal to 15.0 mu m.
(2) And (3) checking that the side surface of the end face of the resistance card to be sprayed has no defects such as padding, particles, floating powder and the like, and preheating the resistance card for 30min at the temperature of 100 ℃.
(3) After preheating, stacking the resistor disc on a spraying station, starting an air draft dust removal system, and uniformly spraying glass glaze slurry on the side surface of the resistor by adopting automatic spraying equipment, wherein the spraying weight is about 0.5g/cm2. In order to ensure the stability of the viscosity of the slurry, the adjustable-speed vortex stirring is carried out in the spraying process, the dynamic circulation state of the slurry is kept, and the deposition of the slurry is avoided. And sorting out unqualified products produced in the spraying process, scraping off the glaze layer, and preheating and spraying the glass glaze again.
(4) And after the surface of the glaze layer is dried, putting the sprayed resistor disc into a sagger, checking whether the glass glaze layer of the resistor disc falls off or whether the middle of the resistor disc is adhered or not, and the like, and after the resistance disc is checked to be qualified, putting the resistor disc into a glue discharging furnace to carry out heat treatment at 510 ℃, and keeping the temperature for 2 hours. The resistance card with smooth surface and high insulating property can be prepared. See table 1.
Example five:
(1) according to the mass calculation, the following components and compositions are mixed according to 1000g of glass powder, 800g of water and 9g of ethanol, the mixed slurry and agate grinding balls are added into a polyurethane grinding tank according to the mass ratio of 2:1, the sealing position of the tank opening is cleaned, a nylon cover is placed into the tank opening (whether the position of a sealing ring of the nylon cover is clamped into a sealing groove is noticed), a stainless steel cover is placed, and a bolt is screwed down. And (3) putting the assembled ball milling tank on a rolling shaft of a ball mill, starting the ball mill, and setting the ball milling speed of 450r/min within 24 hours. After the ball milling is finished, a 200-mesh screen is adopted for processing, and large particles and a small amount of foam which are not ground and refined are removed. And measuring the viscosity and the granularity of the prepared water-based glass glaze slurry, wherein the viscosity is controlled to be 1500-2500mPa.S, and the granularity D50 is controlled to be less than or equal to 15.0 mu m.
(2) And (3) checking that the side surface of the end face of the resistance card to be sprayed has no defects such as padding, particles, floating powder and the like, and preheating the resistance card for 30min at the temperature of 80 ℃.
(3) After preheating, stacking the resistor disc on a spraying station, starting an air draft dust removal system, and uniformly spraying glass glaze slurry on the side surface of the resistor by adopting automatic spraying equipment, wherein the spraying weight is about 0.5g/cm2. In order to ensure the stability of the viscosity of the slurry, the adjustable-speed vortex stirring is carried out in the spraying process, the dynamic circulation state of the slurry is kept, and the deposition of the slurry is avoided. And sorting out unqualified products produced in the spraying process, scraping off the glaze layer, and preheating and spraying the glass glaze again.
And after the surface of the glaze layer is dried, putting the sprayed resistor disc into a sagger, checking whether the glass glaze layer of the resistor disc falls off or whether the middle of the resistor disc is adhered or not, and the like, and after the resistance disc is checked to be qualified, putting the resistor disc into a glue discharging furnace to carry out heat treatment at 500 ℃ for 2 hours. The resistance card with smooth surface and high insulating property can be prepared. See table 1.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (10)
1. A preparation method of water-based glass glaze is characterized by comprising the following steps:
(1) mixing glass powder: deionized water: mixing the aqueous dispersant 1000: 600 and 1000: 2-15, and performing ball milling and sieving on the mixed components to obtain water-based glass glaze slurry;
(2) preheating a workpiece to be glazed, and coating the water-based glass glaze slurry obtained in the step (1) on the workpiece to be glazed after preheating;
(3) and after the surface of the glaze layer of the workpiece is dried, annealing the workpiece, namely forming the water-based glass glaze on the surface of the workpiece.
2. The method for preparing a water-based glass enamel according to claim 1, wherein: in the step (1), the aqueous dispersant is A4040, D134 or ethanol.
3. The method for preparing a water-based glass enamel according to claim 1, wherein: in the step (1), the ball milling time is 24-48 h, and the ball milling speed is 300-500 r/min.
4. The method for preparing a water-based glass enamel according to claim 1, wherein: the sieving is carried out by adopting a 100-200-mesh sieve.
5. The method for preparing a water-based glass enamel according to claim 1, wherein: in the step (1), the viscosity of the sieved water-based glass glaze slurry is 1500-2500mPa.S, and the particle size D50 is less than or equal to 15.0 μm.
6. The method for preparing a water-based glass enamel according to claim 1, wherein: the temperature of the preheating treatment in the step (2) is 80-180 ℃, and the time of the preheating treatment is 30-90 minutes of heat preservation.
7. The method for preparing a water-based glass enamel according to claim 1, wherein: the spraying weight range in the step (2) is controlled to be 0.1-0.5g/cm2。
8. The method for preparing a water-based glass enamel according to claim 1, wherein: the annealing temperature of the annealing treatment in the step (3) is 480-530 ℃, and the heat preservation time of the annealing treatment is 2-4 h.
9. A resistive sheet, characterized by: the resistor disc is provided with the water-based glass glaze prepared by the preparation method of the water-based glass glaze according to any one of claims 1 to 8.
10. The resistive sheet of claim 9, wherein: the resistance card is a ZnO resistance card.
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| CN112851126A (en) * | 2021-03-19 | 2021-05-28 | 厦门Abb 避雷器有限公司 | Lead-free composite glass powder for insulating side surface of ZnO resistance card, preparation method and glass glaze |
| CN113045203A (en) * | 2021-01-11 | 2021-06-29 | 四川大学 | Formula of side glaze of lightning arrester resistor |
| CN113247617A (en) * | 2021-06-18 | 2021-08-13 | 新乡职业技术学院 | A multi-angle conveyor for machine production |
| CN116875095A (en) * | 2023-07-24 | 2023-10-13 | 西安西电避雷器有限责任公司 | Environment-friendly lead-free glass glaze paint, znO varistor side insulating coating and preparation method thereof |
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| CN116875095A (en) * | 2023-07-24 | 2023-10-13 | 西安西电避雷器有限责任公司 | Environment-friendly lead-free glass glaze paint, znO varistor side insulating coating and preparation method thereof |
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Address after: No. 88, Qianwang Road, Aojiang Town, Pingyang County, Wenzhou City, Zhejiang Province 325401 Applicant after: WENZHOU YIKUN ELECTRIC Co.,Ltd. Address before: 325401 Hexiang Road, Aojiang Town, Pingyang County, Wenzhou City, Zhejiang Province Applicant before: WENZHOU YIKUN ELECTRIC Co.,Ltd. |
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Application publication date: 20200811 |