Method for cleaning electronic ceramic parts

Abstract

The application discloses a kind of electronic ceramic parts cleaning method, belong to electronic ceramic material technical field.The application provides a kind of cleaning method to improve the cleaning effect of electronic ceramic parts, comprising: EDTA, citric acid and water are made into cleaning solution according to the mass ratio of 0.8~1.2:0.8~1.2:200;After heating cleaning solution, under the ultrasonic power 160±40W and temperature 40±10 ℃, ultrasonic cleaning is carried out;Then alkali water or acid water is heated, under the ultrasonic power 160±40W and temperature 40±10 ℃, ultrasonic cleaning is carried out;Again, after first cleaning, second cleaning and dehydration drying, cleaning is completed.The application combines EDTA and citric acid, and uses ultrasonic wave synergistic effect to clean, fully exert the advantages of both, reduce the corrosivity to the cleaned article, realize the cleaning effect of efficient, environmental protection and little damage to article.

Description

Technical Field

[0001] This invention belongs to the field of electronic ceramic materials technology, and specifically relates to a cleaning method for electronic ceramic parts. Background Technology

[0002] After mechanical grinding, electronic ceramic parts will have contaminants such as grinding fluid, metal contact residue, ceramic grinding chips, and oil adhering to their surfaces. Incomplete cleaning of these contaminants can affect the electrical, mechanical, and thermal properties of electronic ceramic parts, reducing their service life and, in severe cases, even causing them to become unusable. Traditional cleaning methods, such as using organic solvents alone, suffer from poor environmental friendliness, easy residue buildup, and high costs; cleaning with inorganic acids alone can easily corrode the surface of the cleaned items; and conventional ultrasonic cleaning, relying solely on mechanical vibration, is ineffective at completely removing stubborn dirt, metal oxides, and scale.

[0003] EDTA is a commonly used complexing agent that can form stable complexes with various metal ions, thereby removing rust and metal ion contaminants from metal surfaces. Citric acid is a natural organic acid with good biodegradability and a certain dissolving ability for metal oxides. It is also a weak acid with low corrosiveness to the items being cleaned.

[0004] CN119842446A discloses a ceramic filter plate cleaning agent, which is composed of citric acid, aminosulfonic acid, HEDP, EDTA, corrosion inhibitor, AEO-9, JFC, and ultrapure deionized water. The percentages of the ingredients are: citric acid 10%–20%; aminosulfonic acid 2%–4%; HEDP 2%–5%; EDTA 0.5%–2.5%; corrosion inhibitor 0.1%–0.5%; AEO-9 1%–3%; JFC 1%–3%; and ultrapure deionized water as the balance. However, this cleaning agent is intended for cleaning ceramic filter plates, aiming to remove various dirt and impurities from the surface of the ceramic filter plates, including organic pollutants, metal oxides, and mineral particles. The objects being cleaned are heavily contaminated and extremely difficult to clean. Therefore, the cleaning solution contains a large number of components, resulting in strong corrosiveness. Consequently, this cleaning agent is not suitable for cleaning delicate electronic ceramic parts.

[0005] CN 101217102A discloses a method for removing contaminants from the surface of semiconductor components, comprising the following steps: rinsing the initially wiped semiconductor component with deionized water for 5-10 minutes, ultrasonically cleaning it for 10-30 minutes in a 1-5% aqueous solution of NH4OH:TMAH (100:1), wiping it, rinsing it with deionized water for 5-10 minutes, immersing it in a solution of NH4OH:H2O2:H2O = 1:1:2-5 with added citric acid or EDTA for 20-30 minutes, rinsing it with deionized water for 5-10 minutes, and drying it. This method utilizes the addition of a complexing agent such as citric acid or EDTA, which can effectively complex with metal ions to prevent the formation of deposits, thereby achieving a cleaning effect. However, this method requires cleaning in an alkaline environment, and the alkaline washing intensity is relatively high. The cleaning agent still has a certain degree of corrosiveness and is not suitable for cleaning delicate electronic ceramic components.

[0006] CN102698980A discloses a method for softening and cleaning deposits around marine-exposed ceramic artifacts. The main steps include: 1) immersing the marine-exposed ceramic artifact in a 3-5% hydrochloric acid solution until the solution stops bubbling, and removing the softened deposits; 2) immersing the marine-exposed ceramic artifact treated in step 1 in a mixed solution of 3-6% EDTA-2Na and 1-4% citric acid, and removing the softened deposits. However, this method primarily aims to remove carbonates, sulfates, iron oxides, etc., from the ceramics. The acid pickling intensity is relatively high, and the cleaning agent still has a certain degree of corrosiveness, making it unsuitable for cleaning delicate electronic ceramic parts.

[0007] Currently, the technology of combining EDTA and citric acid and using ultrasonic waves for cleaning has not been fully developed and effectively applied. There is a lack of existing technologies that can give full play to the advantages of both and achieve a cleaning method that is efficient, environmentally friendly and causes little damage to items. Summary of the Invention

[0008] The purpose of this invention is to provide an ultrasonic cleaning method and application based on the synergistic effect of EDTA and citric acid. By combining EDTA and citric acid and integrating the cavitation effect and mechanical vibration of ultrasound, the cleaning efficiency is improved, the ability to remove various types of dirt is enhanced, and damage to the items being cleaned is reduced, thus achieving green and environmentally friendly cleaning.

[0009] To achieve the above objectives, the present invention provides a cleaning method for electronic ceramic parts, comprising the following steps: A. Preparation of cleaning solution: Mix EDTA, citric acid and water in a mass ratio of 0.8~1.2:0.8~1.2:200 to obtain a cleaning solution; Inorganic alkali and water are mixed evenly at a mass ratio of 0.5~1.5:100 to obtain alkali solution; Inorganic acid and water are mixed evenly at a mass ratio of 0.5~1.5:100 to obtain acid water; B. Heat the cleaning solution obtained in step A to 40±10℃, put the electronic ceramic parts to be cleaned into the cleaning solution, perform ultrasonic cleaning at an ultrasonic power of 160±40W and a temperature of 40±10℃, and then put the parts into water for rinsing. C. Heat the alkaline or acidic solution obtained in step A to 40±10℃, put the parts cleaned in step B into it, and perform ultrasonic cleaning at an ultrasonic power of 160±40W and a temperature of 40±10℃, and then rinse them in water. D. First cleaning: Heat the water to 40±10℃, put the parts cleaned in step C into it, and perform ultrasonic cleaning at an ultrasonic power of 140±60W and a temperature of 40±10℃. E. Second cleaning: Heat the water to 40±10℃, put the parts cleaned in step D into it, and perform ultrasonic cleaning at an ultrasonic power of 140±60W and a temperature of 40±10℃. F. Dehydration and drying: After the second cleaning, the parts are dehydrated and dried to complete the cleaning process.

[0010] Preferably, in the cleaning method for the above-mentioned electronic ceramic parts, in step A, EDTA, citric acid and water are mixed evenly in a mass ratio of 1±0.1:1±0.1:200.

[0011] In the cleaning method for the aforementioned electronic ceramic parts, in step A, the inorganic alkali is at least one of sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, sodium hypochlorite, potassium hypochlorite, sodium hydroxide, or potassium hydroxide.

[0012] Preferably, in the cleaning method for the above-mentioned electronic ceramic parts, in step A, the inorganic alkali is sodium carbonate or potassium carbonate.

[0013] In the cleaning method for the aforementioned electronic ceramic parts, in step A, the inorganic acid is at least one of concentrated hydrochloric acid, sulfuric acid, or phosphoric acid.

[0014] Preferably, in the cleaning method for the above-mentioned electronic ceramic parts, the inorganic acid in step A is concentrated hydrochloric acid.

[0015] In the cleaning method for the aforementioned electronic ceramic parts, in step B, when the electronic ceramic parts are ceramic sheets, during ultrasonic cleaning, the spacing between each part is not less than 5mm, and they are placed vertically into the cleaning solution; when the electronic ceramic parts are ceramic tiles, during ultrasonic cleaning, the spacing between each layer of parts is not less than 5mm, and they are placed with the inner diameter facing downwards into the cleaning solution.

[0016] Preferably, in the cleaning method for the above-mentioned electronic ceramic parts, step B involves ultrasonic cleaning at an ultrasonic power of 160±10W and a temperature of 40±1℃.

[0017] In the cleaning method for the aforementioned electronic ceramic parts, step B involves ultrasonic cleaning for 35 ± 15 minutes.

[0018] In the cleaning method for the aforementioned electronic ceramic parts, step B involves rinsing for 3 ± 2 minutes.

[0019] In the cleaning method for the aforementioned electronic ceramic parts, in step B, when the electronic ceramic parts are ceramic tiles, the cleaning parameters are: ultrasonic power 160±5W, ultrasonic temperature 40±1℃, ultrasonic time 30±5min, and rinsing time 2~3min; when the electronic ceramic parts are ceramic tiles, the cleaning parameters are: ultrasonic power 170±5W, ultrasonic temperature 45±1℃, ultrasonic time 30±5min, and rinsing time 2~3min.

[0020] Preferably, in the cleaning method for the above-mentioned electronic ceramic parts, step C involves ultrasonic cleaning at an ultrasonic power of 160±10W and a temperature of 40±1℃.

[0021] In the cleaning method for the above-mentioned electronic ceramic parts, in step C, the ultrasonic cleaning time is 30±10 min.

[0022] In the cleaning method for the above-mentioned electronic ceramic parts, the rinsing time in step C is 3±2 min.

[0023] In the cleaning method for the above-mentioned electronic ceramic parts, in step D, the ultrasonic cleaning time is 35±10 min.

[0024] In the cleaning method for the above-mentioned electronic ceramic parts, in step E, the ultrasonic cleaning time is 35±10 min.

[0025] In the cleaning method for the above-mentioned electronic ceramic parts, step F involves dehydrating the parts in alcohol for 10 ± 10 min.

[0026] In the cleaning method for the above-mentioned electronic ceramic parts, in step F, the drying temperature is 55±10℃ and the time is 50±30min.

[0027] In the cleaning method for the above-mentioned electronic ceramic parts, in step F, when the electronic ceramic parts are ceramic tiles, the dehydration time is 10±5 min, the drying temperature is 50±5℃, and the drying time is 50±5 min; when the electronic ceramic parts are ceramic tiles, the dehydration time is 15±5 min, the drying temperature is 55±5℃, and the drying time is 65±5 min.

[0028] The beneficial effects of this invention are: This invention combines EDTA (ethylenediaminetetraacetic acid) and citric acid, utilizing ultrasonic waves for synergistic cleaning. This fully leverages the advantages of both, reducing corrosiveness to the cleaned items. It is particularly suitable for cleaning precision instruments and fragile materials, achieving a highly efficient, environmentally friendly cleaning effect with minimal damage. It can quickly and effectively remove various types of dirt, achieving thorough cleaning of stubborn stains, metal oxides, limescale, and other difficult-to-remove dirt. This invention is environmentally friendly and safe; citric acid is a natural organic acid that is biodegradable, and the cleaning solution does not contain toxic or harmful organic solvents, making it environmentally friendly. Furthermore, this invention is low-cost, and the cleaning solution can be reused a certain number of times, reducing cleaning costs. Attached Figure Description

[0029] Figure 1 The parts are shown after cleaning in Example 1.

[0030] Figure 2 The part after cleaning in Example 6.

[0031] Figure 3 The part after cleaning in Example 9. Detailed Implementation

[0032] Specifically, a cleaning method for electronic ceramic components includes the following steps: A. Preparation of cleaning solution: Weigh EDTA, citric acid and deionized water in a mass ratio of 0.8~1.2:0.8~1.2:200, add them to a beaker or other container in sequence, stir well to obtain the cleaning solution, and set aside for later use; Weigh out inorganic alkalis such as sodium carbonate and deionized water in a mass ratio of 0.5~1.5:100, add them to a beaker or other container in sequence, stir well to obtain alkaline water, and set aside for later use. Weigh concentrated hydrochloric acid and other inorganic acids and deionized water in a mass ratio of 0.5~1.5:100, add them to a beaker or other container in sequence, stir well to obtain acid water, and set aside for later use. B. Take the cleaning solution prepared in step A, a sufficient amount (the amount of cleaning agent is determined according to the size of the container and the parts to be cleaned; in principle, the liquid level should be 3-5 cm higher than the parts after they are placed in the machine), add it to ultrasonic cleaner a, turn on the heating, and set the heating temperature to 40±10℃. After heating to the specified temperature, start placing the parts in the machine. Place the parts in the cleaning solution and perform ultrasonic cleaning at an ultrasonic power of 160±40W and a temperature of 40±10℃. Then, rinse the parts in water. C. Take the prepared alkaline solution from step A, a sufficient amount (the amount of alkaline solution depends on the size of the container and the parts to be cleaned; in principle, the liquid level should be 3-5 cm higher than the parts after they are placed in the container), and add it to ultrasonic cleaner b. Turn on the heating and set the heating temperature to 40±10℃. After heating to the specified temperature, start placing the container rack and parts in the machine. Set the ultrasonic power to 160±40W and perform ultrasonic cleaning. After completion, rinse in deionized water. If acidic water is used for cleaning, place the parts in ultrasonic cleaner c, with other parameters remaining the same. D. Heat the ultrasonic cleaner containing deionized water (the amount of deionized water depends on the size of the container and the parts to be cleaned; in principle, the liquid level should be 3-5 cm higher than the parts after they are placed in the machine) to 40±10℃, then put in the parts that have been acid / alkali cleaned in the previous step (along with the container rack), set the ultrasonic power to 140±60W, and perform ultrasonic cleaning. This step is called "first cleaning". E. Place the parts obtained after the first cleaning into a new ultrasonic cleaner with deionized water (the amount of deionized water is determined according to the size of the container and the parts to be cleaned; in principle, the liquid level should be 3-5 cm higher than the parts after they are placed in the machine). Repeat step D. This step is called the second cleaning. F. After the first and second cleanings, place the parts in alcohol to dehydrate. The time depends on the appearance and complexity of the product. After dehydration, take out the parts, place them neatly in a special drying container, and then put them in an oven to dry. The cleaning is now complete.

[0033] In step A of this invention, EDTA is industrial grade with a purity > 99%, and citric acid is industrial grade with a purity > 99.4%.

[0034] In step A of this invention, the inorganic base refers to an inorganic substance that dissolves in water or hydrolyzes to form an alkaline solution, including at least one of sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, sodium hypochlorite, potassium hypochlorite, sodium hydroxide, or potassium hydroxide. This invention preferably uses industrial-grade sodium carbonate with a purity ≥99.2%.

[0035] In step A of this invention, inorganic acid refers to an inorganic substance that is soluble in water or hydrolyzes into an acid, including at least one of concentrated hydrochloric acid, sulfuric acid, or phosphoric acid. This invention preferably uses industrial-grade concentrated hydrochloric acid with a purity >36%.

[0036] In step B of this invention, ultrasonic cleaning is preferably performed at an ultrasonic power of 160±10W and a temperature of 40±1℃; in step B, the ultrasonic cleaning time is 35±15min; in step B, the rinsing time is 3±2min.

[0037] Depending on the product type, the placement method, ultrasonic power, cleaning time, and cleaning temperature all need to be adjusted to suit the requirements. For ceramic tile products, spacers should be inserted to ensure that there is a minimum gap of 5mm between each piece. The tile should be placed vertically in the ultrasonic cleaner along with the container. The cleaning parameters are: ultrasonic power 160±5W, ultrasonic temperature 40±1℃, ultrasonic time 30±5min, and rinsing time 2~3min. For ceramic tile products, the number of layers should be determined according to the size. Spacers should be used between each layer, and the gap between each piece should be no less than 5mm. The inner diameter of the pieces should face downwards to ensure that foreign objects and impurities can be removed promptly. The cleaning parameters are: ultrasonic power 170±5W, ultrasonic temperature 45±1℃, ultrasonic time 30±5min, and rinsing time 2~3min.

[0038] In step C of this invention, ultrasonic cleaning is preferably performed at an ultrasonic power of 160±10W and a temperature of 40±1℃; in step C, the ultrasonic cleaning time is 30±10min; in step C, the rinsing time is 3±2min.

[0039] After cleaning with a cleaning agent in step B and alkali / acid washing in step C of this invention, the parts are cleaned by rinsing with water and by rapid oscillation.

[0040] In step D of this invention, the ultrasonic cleaning time is 35±10 min.

[0041] In step E of this invention, the ultrasonic cleaning time is 35±10 min.

[0042] In step F of this invention, the water is dehydrated in alcohol for 10±10 min; in step F, the drying temperature is 55±10℃ and the time is 50±30 min.

[0043] In step F of this invention, when the electronic ceramic part is a ceramic sheet, the dehydration time is 10±5 min, the drying temperature is 50±5℃, and the drying time is 50±5 min; when the electronic ceramic part is a ceramic tile, the dehydration time is 15±5 min, the drying temperature is 55±5℃, and the drying time is 65±5 min.

[0044] During the research for this invention, it was discovered that if parts are placed in a cleaning agent and then heated to a set temperature, the part temperature will continuously rise (the parts absorb heat and heat up). Although the cleaning agent of this invention has very low corrosivity and the alkalinity / acidity of the alkali / acid solution is also low, it still has a certain degree of corrosivity, which will accelerate the rate at which the cleaning solution corrodes the parts internally. Therefore, this invention first heats the solution to a set temperature (at which point the cleaning solution has optimal activity) before placing the parts in (at which point the parts are at room temperature, creating a temperature difference with the cleaning solution). This maximizes the removal of surface stains from the parts, improves cleaning efficiency, and minimizes corrosion. Therefore, in this invention, in ultrasonic cleaning with the cleaning solution, ultrasonic cleaning with the alkali / acid solution, and in both the "first cleaning" and "second cleaning" processes, the parts are first heated to a set temperature before being placed in.

[0045] The present invention will be further described in detail below through embodiments, but the scope of protection of the present invention is not limited to the embodiments described herein.

[0046] In this embodiment, the alkaline solution used for alkaline washing is prepared by the following method: industrial grade sodium carbonate with a purity ≥99.2% is weighed and mixed with deionized water at a mass ratio of 1:100, stirred evenly to obtain alkaline solution; set aside for later use.

[0047] In the embodiment, "first cleaning" and "second cleaning" are performed as follows: the ultrasonic cleaner containing deionized water is heated to 40°C, and the cleaned parts (along with the container rack) are placed in the ultrasonic cleaner. The ultrasonic power is set to 140W, and the ultrasonic cleaning is performed for 35 minutes.

[0048] Example 1 Preparation of cleaning solution: Weigh 10g EDTA, 10g citric acid, and 2000g deionized water, stir well, and the cleaning solution is prepared.

[0049] Cleaning process: After the cleaning solution is heated to the set temperature of 40℃, ceramic pieces with oil stains, ceramic residues, etc. on the surface are placed into the aforementioned cleaning solution. The power is set to 160W, and ultrasonic cleaning is performed at a temperature of 40℃ for 30 minutes. Then, the ceramic pieces are rinsed with clean water for 2 minutes. Next, perform alkaline cleaning. After heating the alkaline water to the set temperature of 40°C, put in the ceramic sheet, set the temperature to 40°C, set the power to 160W, and ultrasonically clean for 30 minutes. Then put it in deionized water and rinse for 2 minutes. Then there's the "first clearance" and the "second clearance"; Finally, dehydrate and dry for 10 minutes at a temperature of 50°C for 50 minutes.

[0050] After cleaning, oil stains, ceramic residues, etc. on the product surface are completely removed, leaving the surface shiny and new, with no corrosion.

[0051] Example 2 Preparation of cleaning solution: Weigh 10g EDTA, 10g acetic acid, and 2000g deionized water, stir well, and the cleaning solution is prepared.

[0052] Cleaning process: After the cleaning solution is heated to the set temperature of 40℃, ceramic pieces with oil stains, ceramic residues, etc. on the surface are placed into the aforementioned cleaning solution. The power is set to 160W, and ultrasonic cleaning is performed at a temperature of 40℃ for 30 minutes. Then, the ceramic pieces are rinsed with clean water for 2 minutes. Next, perform alkaline cleaning. After heating the alkaline water to the set temperature of 40°C, put in the ceramic sheet, set the temperature to 40°C, set the power to 160W, and ultrasonically clean for 30 minutes. Then put it in deionized water and rinse for 2 minutes. Then there's the "first clearance" and the "second clearance"; Finally, dehydrate and dry for 10 minutes at a temperature of 50°C for 50 minutes.

[0053] After cleaning, the product's appearance is intact, with all surface oil stains and ceramic residues completely removed, leaving a slightly pale yellow color and showing no signs of corrosion.

[0054] Example 3 Preparation of cleaning solution: Weigh 10g EDTA, 50g citric acid, and 2000g deionized water, stir well, and the cleaning solution is prepared.

[0055] Cleaning process: After the cleaning solution is heated to the set temperature of 40℃, ceramic pieces with oil stains, ceramic residues, etc. on the surface are placed into the aforementioned cleaning solution. The power is set to 160W, and ultrasonic cleaning is performed at a temperature of 40℃ for 30 minutes. Then, the ceramic pieces are rinsed with clean water for 2 minutes. Next, perform alkaline cleaning. After heating the alkaline water to the set temperature of 40°C, put in the ceramic sheet, set the temperature to 40°C, set the power to 160W, and ultrasonically clean for 30 minutes. Then put it in deionized water and rinse for 2 minutes. Then there's the "first clearance" and the "second clearance"; Finally, dehydrate and dry for 10 minutes at a temperature of 50°C for 50 minutes.

[0056] After cleaning, the product's appearance is intact, with all surface oil stains and ceramic residues completely removed, although there is slight corrosion on the surface.

[0057] Example 4 Preparation of cleaning solution: Weigh 50g EDTA, 10g citric acid and 2000g deionized water, stir well to obtain cleaning solution.

[0058] Cleaning process: After the cleaning solution is heated to the set temperature of 40℃, ceramic pieces with oil stains, ceramic residues, etc. on the surface are placed into the aforementioned cleaning solution. The power is set to 160W, and ultrasonic cleaning is performed at a temperature of 40℃ for 30 minutes. Then, the ceramic pieces are rinsed with clean water for 2 minutes. Next, perform alkaline cleaning. After heating the alkaline water to the set temperature of 40°C, put in the ceramic sheet, set the temperature to 40°C, set the power to 160W, and ultrasonically clean for 30 minutes. Then put it in deionized water and rinse for 2 minutes. Then there's the "first clearance" and the "second clearance"; Finally, dehydrate and dry for 10 minutes at a temperature of 50°C for 50 minutes.

[0059] After cleaning, the product's appearance is intact, with all surface oil stains and ceramic residues completely removed, leaving a glossy surface and no signs of corrosion.

[0060] Example 5 Preparation of cleaning solution: Weigh 10g EDTA, 10g citric acid, and 2000g deionized water, stir well, and the cleaning solution is prepared.

[0061] Cleaning process: After the cleaning solution is heated to the set temperature of 40℃, ceramic pieces with oil stains, ceramic residues, etc. on the surface are placed into the aforementioned cleaning solution. The power is set to 80W, and ultrasonic cleaning is performed at a temperature of 40℃ for 30 minutes. Then, the ceramic pieces are rinsed with clean water for 2 minutes. Next, perform alkaline cleaning. After heating the alkaline water to the set temperature of 40°C, put in the ceramic sheet, set the temperature to 40°C and the power to 80W, and ultrasonically clean for 30 minutes. Then put it in deionized water and rinse for 2 minutes. Then there's the "first clearance" and the "second clearance"; Finally, dehydrate and dry for 10 minutes at a temperature of 50°C for 50 minutes.

[0062] After cleaning, the product's appearance was intact, the surface oil stains were completely removed, but there were a few residues. The surface was relatively shiny and there was no corrosion.

[0063] Example 6 Preparation of cleaning solution: Weigh 10g EDTA, 10g citric acid, and 2000g deionized water, stir well, and the cleaning solution is prepared.

[0064] Cleaning process: After the cleaning solution is heated to the set temperature of 40°C, ceramic pieces with oil stains, ceramic residues, etc. on the surface are placed into the aforementioned cleaning solution. The power is set to 320W, and ultrasonic cleaning is performed at a temperature of 40°C for 30 minutes. Then, the ceramic pieces are rinsed with clean water for 2 minutes. Next, perform alkaline cleaning. After heating the alkaline water to the set temperature of 40°C, put in the ceramic sheet, set the temperature to 40°C, set the power to 320W, and ultrasonically clean for 30 minutes. Then put it in deionized water and rinse for 2 minutes. Then there's the "first clearance" and the "second clearance"; Finally, dehydrate and dry for 10 minutes at a temperature of 50°C for 50 minutes.

[0065] After cleaning, the product's appearance is average, with some corrosion on the edges. Oil stains and residues on the surface are completely removed, leaving the surface shiny.

[0066] Example 7 Preparation of cleaning solution: Weigh 10g EDTA, 10g citric acid, and 2000g deionized water, stir well, and the cleaning solution is prepared.

[0067] Cleaning process: After the cleaning solution is heated to the set temperature of 25°C, ceramic pieces with oil stains, ceramic residues, etc. on the surface are placed into the aforementioned cleaning solution. The power is set to 160W, and ultrasonic cleaning is performed at a temperature of 25°C for 30 minutes. Then, the ceramic pieces are rinsed with clean water for 2 minutes. Next, perform alkaline cleaning. After heating the alkaline water to the set temperature of 40°C, put in the ceramic sheet, set the temperature to 40°C, set the power to 160W, and ultrasonically clean for 30 minutes. Then put it in deionized water and rinse for 2 minutes. Then there's the "first clearance" and the "second clearance"; Finally, dehydrate and dry for 10 minutes at a temperature of 50°C for 50 minutes.

[0068] After cleaning, the product's appearance was intact, and ceramic residues on the surface were completely removed, but there were oil stains remaining. The surface was generally normal and there was no corrosion.

[0069] Example 8 Preparation of cleaning solution: Weigh 10g EDTA, 10g citric acid, and 2000g deionized water, stir well, and the cleaning solution is prepared.

[0070] Cleaning process: After the cleaning solution is heated to the set temperature of 65℃, ceramic pieces with oil stains, ceramic residues, etc. on the surface are placed into the aforementioned cleaning solution. The power is set to 160W, and ultrasonic cleaning is performed at a temperature of 65℃ for 30 minutes. Then, the ceramic pieces are rinsed with clean water for 2 minutes. Next, perform alkaline cleaning. After heating the alkaline water to the set temperature of 40°C, put in the ceramic sheet, set the temperature to 40°C, set the power to 160W, and ultrasonically clean for 30 minutes. Then put it in deionized water and rinse for 2 minutes. Then there's the "first clearance" and the "second clearance"; Finally, dehydrate and dry for 10 minutes at a temperature of 50°C for 50 minutes.

[0071] After cleaning, the product's appearance was intact, with surface oil stains and ceramic residues completely removed, although there was obvious corrosion on the surface and edges.

[0072] Example 9 Preparation of cleaning solution: Weigh 10g EDTA, 10g citric acid, and 2000g deionized water, stir well, and the cleaning solution is prepared.

[0073] Cleaning process: After the cleaning solution is heated to the set temperature of 40℃, ceramic pieces with oil stains, ceramic residues, etc. on the surface are placed into the aforementioned cleaning solution. The power is set to 160W, and ultrasonic cleaning is performed at a temperature of 40℃ for 10 minutes. Then, the ceramic pieces are rinsed with clean water for 2 minutes. Next, perform alkaline cleaning. After heating the alkaline water to the set temperature of 40°C, put in the ceramic sheet, set the temperature to 40°C, set the power to 160W, and ultrasonically clean for 30 minutes. Then put it in deionized water and rinse for 2 minutes. Then there's the "first clearance" and the "second clearance"; Finally, dehydrate and dry for 10 minutes at a temperature of 50°C for 50 minutes.

[0074] After cleaning, the product's appearance was intact, with no oil stains or ceramic residue completely removed. The surface was shiny and new, and there was no corrosion.

[0075] Table 1 Cleaning results of the example / piece As can be seen from Table 1 and the attached figure, Figure 1 The parts cleaned in Example 1 have a 100% cleaning yield, with no defects, and the cleaning effect is significantly better than other examples. Figure 2 The part in Example 6, after cleaning, showed cracks on its left edge; Figure 3 The part in Example 9 was cleaned, but its surface still had oil stains and other residues that were not completely cleaned.

Claims

1. A cleaning method for electronic ceramic parts, characterized in that: Includes the following steps: A. Preparation of cleaning solution: Mix EDTA, citric acid and water in a mass ratio of 0.8~1.2:0.8~1.2:200 to obtain a cleaning solution; Inorganic alkali and water are mixed evenly at a mass ratio of 0.5~1.5:100 to obtain alkali solution; Inorganic acid and water are mixed evenly at a mass ratio of 0.5~1.5:100 to obtain acid water; B. Heat the cleaning solution obtained in step A to 40±10℃, put the electronic ceramic parts to be cleaned into the cleaning solution, perform ultrasonic cleaning at an ultrasonic power of 160±40W and a temperature of 40±10℃, and then put the parts into water for rinsing. C. Heat the alkaline or acidic solution obtained in step A to 40±10℃, put the parts cleaned in step B into it, and perform ultrasonic cleaning at an ultrasonic power of 160±40W and a temperature of 40±10℃, and then rinse them in water. D. First cleaning: Heat the water to 40±10℃, put the parts cleaned in step C into it, and perform ultrasonic cleaning at an ultrasonic power of 140±60W and a temperature of 40±10℃. E. Second cleaning: Heat the water to 40±10℃, put the parts cleaned in step D into it, and perform ultrasonic cleaning at an ultrasonic power of 140±60W and a temperature of 40±10℃. F. Dehydration and drying: After the second cleaning, the parts are dehydrated and dried to complete the cleaning process.

2. The cleaning method for electronic ceramic parts according to claim 1, characterized in that: In step A, EDTA, citric acid and water are mixed evenly in a mass ratio of 1±0.1:1±0.1:

200.

3. The cleaning method for electronic ceramic parts according to claim 1, characterized in that: At least one of the following must be met: In step A, the inorganic base is at least one of sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, sodium hypochlorite, potassium hypochlorite, sodium hydroxide, or potassium hydroxide. In step A, the inorganic acid is at least one of concentrated hydrochloric acid, sulfuric acid, or phosphoric acid.

4. The cleaning method for electronic ceramic parts according to claim 1, characterized in that: At least one of the following must be met: In step A, the inorganic base is sodium carbonate or potassium carbonate; In step A, the inorganic acid is concentrated hydrochloric acid.

5. The cleaning method for electronic ceramic parts according to claim 1, characterized in that: In step B, when the electronic ceramic parts are ceramic sheets, during ultrasonic cleaning, the spacing between each part should be no less than 5 mm, and they should be placed vertically into the cleaning solution; when the electronic ceramic parts are ceramic tiles, during ultrasonic cleaning, the spacing between each layer of parts should be no less than 5 mm, and they should be placed with the inner diameter facing down into the cleaning solution.

6. The cleaning method for electronic ceramic parts according to claim 1, characterized in that: At least one of the following must be met: In step B, ultrasonic cleaning is performed at an ultrasonic power of 160±10W and a temperature of 40±1℃. In step B, the ultrasonic cleaning time is 35±15 min; In step B, the rinsing time is 3 ± 2 minutes.

7. The cleaning method for electronic ceramic parts according to claim 1, characterized in that: In step B, when the electronic ceramic parts are ceramic tiles, the cleaning parameters are: ultrasonic power 160±5W, ultrasonic temperature 40±1℃, ultrasonic time 30±5min, and rinsing time 2~3min; when the electronic ceramic parts are ceramic tiles, the cleaning parameters are: ultrasonic power 170±5W, ultrasonic temperature 45±1℃, ultrasonic time 30±5min, and rinsing time 2~3min.

8. The cleaning method for electronic ceramic parts according to claim 1, characterized in that: At least one of the following must be met: In step C, ultrasonic cleaning is performed at an ultrasonic power of 160±10W and a temperature of 40±1℃. In step C, the ultrasonic cleaning time is 30±10 min; In step C, the rinsing time is 3 ± 2 min; In step D, the ultrasonic cleaning time is 35±10 min; In step E, the ultrasonic cleaning time is 35±10 min.

9. The cleaning method for electronic ceramic parts according to claim 1, characterized in that: In step F, dehydrate in alcohol for 10 ± 10 min.

10. The cleaning method for electronic ceramic parts according to claim 1, characterized in that: In step F, the drying temperature is 55±10℃ and the time is 50±30min.

11. The cleaning method for electronic ceramic parts according to claim 1, characterized in that: In step F, when the electronic ceramic parts are ceramic sheets, the dehydration time is 10±5 min, the drying temperature is 50±5℃, and the drying time is 50±5 min.

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