CN105541305A - Preparation method of silicon controlled rectifier product with inner diameter of 180mm - Google Patents
Preparation method of silicon controlled rectifier product with inner diameter of 180mm Download PDFInfo
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Abstract
The present invention relates to a preparation method of a silicon controlled rectifier product with inner diameter of 180mm. The preparation method is as below: first pouring raw materials including 93-94 parts by weight of alumina, 1.5-2.5 parts by weight of magnesium oxide, 2-4 parts by weight of silica, 1-2 parts by weight of calcium carbonate and 2-3 parts by weight of kaolin into a ball mill; successively adding a binder phenolic resin and a dispersant n-caprylic alcohol in the raw materials to prepare a slurry; then granulating, homogenizing and screening the slurry, and conducting compression molding by a isostatic pressing machine; and finally conducting sintering, glazing and glaze firing to obtain a circular ceramic finished product with inner diameter of 178.8-181.3mm and height of 17.5-17.7mm. The preparation method of the present invention is simple and easy to operate, can effectively reduce the impurities in the product, improve product deformation and increase the product qualified rate. The prepared large-size product has a stable structure and controllable inner diameter of 180mm.
Description
Technical field
The present invention relates to a kind of preparation method of silicon controlled rectifier 180mm internal diameter product, belong to ceramic preparing technical field.
Background technology
The raw materials such as aluminium sesquioxide, calcium carbonate, silicon oxide, kaolin and talcum powder mainly mix by existing production method by a certain percentage, the mode of injection moulding is used to make required ceramic idiosome, obtain required product through operations such as de-waxing, high temperature sintering, glazings, this series products internal diameter is less than 120mm.Utilize the conforming product rate of this kind of method production between 35 ~ 50%, cause bad major cause to be impurity, deformation of products etc.
Summary of the invention
The object of the invention is in the production process in order to solve silicon-containing ceramic in prior art because the apolegamy preparation of processing method and raw material is only applicable to prepare the problem that internal diameter is less than 120mm product, a kind of preparation method of silicon controlled rectifier 180mm internal diameter product is provided, the impurity of product can be effectively reduced, improve deformation of products, improve the qualification rate of product.
The present invention adopts following technical scheme: a kind of preparation method of silicon controlled rectifier 180mm internal diameter product, comprises the steps:
(1) raw material ball milling: get 93 ~ 94 parts by weight of alumina, 1.5 ~ 2.5 weight part magnesium oxide, 2 ~ 4 weight part silicon oxide, 1 ~ 2 weight parts of calcium carbonate, 2 ~ 3 parts by weight kaolin clay are that raw material is poured in ball mill, and adding adhesive phenolic resin and dispersion agent n-Octanol in the feed successively, ball milling obtains the slurry that viscosity is 6000 ~ 6009mpa.s;
(2) granulation: the slurry after ball milling is added centrifugal atomizer entrance, sprayer nozzle rotates with the frequency of 16 ~ 18Hz/RPM, and the powder particle size obtained is 98 ~ 220 μm;
(3) screen: screening obtains the powder that size is 125 ~ 175 μm;
(4) homogenize: the powder after screening is put into homogenization machine and stirs 30 ~ 32min, homogenization machine rotating speed 16 ~ 20r/min, the opening for feed of homogenization machine and discharge port are provided with permanent bar magnet can clear up the impurity such as the oxide compound of iron in powder and iron;
(5) shaping: to use isostatic pressing method shaping, the powder after screening is placed in mould, then mould is put into isostatic pressing machine, progressively pressurizeed by supercharging system, make the pressure-controlling of isostatic pressing machine at 236 ~ 240Mpa, obtain ceramic idiosome;
(6) Vehicle Processing: with lathe, ceramic idiosome is made required annular pottery idiosome, product internal diameter reaches 205.5 ~ 208.5mm;
(7) sinter: the ceramic idiosome both ends of the surface after Vehicle Processing are with 1.7 ~ 2.4g/cm
2evenly brush and smear slurry, ceramic idiosome and the pad sintered are put into the heating zone of tunnel sintering oven burner hearth, pottery idiosome is coaxially placed on pad, the top end face distance tunnel sintering oven roof of the furnace of pottery idiosome is 30 ~ 50mm, ceramic idiosome and pad is pushed to cooling zone through heating zone from the heating zone of tunnel sintering oven burner hearth, the annular ceramic semi-finished product that internal diameter is 178.8 ~ 181.3mm is obtained after having sintered;
(8) hole: carry out with digital controlled lathe the gate pole hole machined that silicon controlled rectifier plays trigger action, gate pole hole is 3.0 ~ 3.5mm to end face distance, and aperture is 1.0 ~ 2.0mm, the degree of depth 3.5 ~ 4.0mm;
(9) clean: work in-process and triangle abrasive material are put into oscillating mill with the ratio of 1.5:7 ~ 8 and after 15 ~ 18 minutes, clear water is poured into, after rinsing grinding, stay the impurity of product surface;
(10) flat stone mill: the height of product is worn into 17.5 ~ 17.7mm with grinding machine, the surface roughness Ra of work in-process end flat is at 3 ~ 3.5 μm;
(11) pickling: work in-process being soaked in volumetric molar concentration is in the dilute hydrochloric acid solution of 1 ~ 2mol/L, soaks 20 ~ 30min and removes the impurity that work in-process adhere to, for glazing is ready;
(12) dry: put into baking oven 2 ~ 3h after work in-process being placed in porcelain dish, the temperature of baking oven is 135 ~ 150 DEG C;
(13) glazing: spray one deck glaze water on work in-process;
(14) gloss firing: the heating zone ceramic body after glazing and the pad sintered being put into tunnel sintering oven burner hearth, ceramic body is coaxially placed on pad, the top end face distance tunnel sintering oven roof of the furnace of ceramic body is 30 ~ 50mm, ceramic body and pad is pushed to cooling zone through heating zone from the heating zone of tunnel sintering oven burner hearth, carry out gloss firing process, terminate to obtain annular ceramic product, product internal diameter is 178.8 ~ 181.3mm, height 17.5 ~ 17.7mm.
Further, the add-on of described adhesive phenolic resin is 5 ~ 6% of raw material total mass, and the add-on of dispersion agent n-Octanol is 1.1 ~ 1.4% of raw material total mass.
Further, the preparation method smearing slurry in described step (7) is: mixed with the part by weight of 6 ~ 6.5:1 with water by carboxymethyl cellulose, obtain mixed solution, and husky to mixed solution and 80 ~ 90 object corundum to be mixed to get by the part by weight of 4 ~ 5:1.5 is smeared slurry.
Further, described in described step (7), ceramic idiosome is sintered into ceramic product in heating zone, the temperature of heating zone controls at 1540 ~ 1577 DEG C, advance ceramic idiosome from heating zone to heating zone continuously, often push away and once namely push ahead 25 ~ 27mm, often push away once 3 ~ 5min consuming time, often push away and control at 45 ~ 48min an interval time, control at 11 ~ 12h by the always consuming time of heating zone, control at 3.2 ~ 3.5h by the always consuming time of heating zone, controlled at 16 ~ 17h by the always consuming time of cooling zone.
Further, ceramic body and pad is pushed to cooling zone from the heating zone of tunnel sintering oven burner hearth through heating zone in described step (12), ceramic body is sintered into ceramic product in heating zone, the temperature of heating zone controls at 1530 ~ 1580 DEG C, often push away and once namely push ahead 20 ~ 30mm, often push away once 3 ~ 5min consuming time, often push away and control at 40 ~ 50min an interval time, control at 10 ~ 12h by the always consuming time of heating zone, control at 3 ~ 4h by the always consuming time of heating zone, controlled at 15 ~ 18h by the always consuming time of cooling zone.
Further, first screen through 80 ~ 90 object sieves and then through 150 ~ 160 object sieves in described step (4)
Further, in described step (5), the operating environment temperature of isostatic pressing machine is 22 ~ 24 DEG C.
Further, in described step (1) Raw and ball mill, the mass ratio of ballstone is 4 ~ 4.5:1, ball milling 25 ~ 30 hours, drum's speed of rotation 31 ~ 32r/min.
Further, in described step (7), after sintering, the deformation rate of product is 5 ‰ ~ 8 ‰.
Further, the thickness 15 ~ 16mm of described step (7) Intermediate gasket, in sintering oven, the heating zone temperature difference be positioned on sea line between 3 controls at 1 ~ 6 DEG C.
Preparation method of the present invention is simple, step easy handling, magnesium oxide is added in raw material, the frictional force of ceramic powder in moulding process can be reduced, the density of the ceramic idiosome of further raising and density uniformity, adopt the ceramic idiosome of isostatic pressing to make required shape through Vehicle Processing, reduce ceramic idiosome and irony contacting dies in the course of processing, avoid iron contamination small on mould to enter product, prepare Stability Analysis of Structures and the controlled 180mm large size product of internal diameter.
Embodiment
Below in conjunction with specific embodiment, the present invention is further illustrated.
Embodiment one:
(1) raw material ball milling: pour 93 parts by weight of alumina, 4 weight part silicon oxide, 1.5 weight parts of calcium carbonate, 3 parts by weight kaolin clay, the magnesian raw material of 1.5 weight part into ball mill, in raw material and ball mill, the mass ratio of ballstone is 3:1, add the binding agent PVA of raw material total mass 5%, the dispersion agent n-Octanol of raw material total mass 1% simultaneously, drum's speed of rotation 30r/min, ball milling 23.5 hours, obtains the slurry of viscosity 6010mpa.s;
(2) granulation: slurry is added centrifugal atomizer entrance, sprayer nozzle rotates with the frequency of 16Hz/RPM, the powder particle size obtained 98 ~ 220 μm;
(3) screen: screening obtains the powder that size is 125 ~ 175 μm; ;
(4) homogenize: the powder after screening is put into homogenization machine and stir the opening for feed of 32min, homogenization machine rotating speed 16r/min homogenization machine and discharge port and be provided with permanent bar magnet and can clear up the impurity such as the oxide compound of iron in powder and iron;
(5) shaping: to use isostatic pressing method shaping, the powder after screening is placed in mould, then mould is put into isostatic pressing machine, progressively pressurizeed by supercharging system, the pressure-controlling of isostatic pressing machine, at 236Mpa, obtains ceramic idiosome, and operating environment temperature keeps 22 DEG C;
(6) Vehicle Processing: utilize lathe ceramic idiosome to be made required annular pottery idiosome, product internal diameter reaches 205.5mm;
(7) sinter: 1. carboxymethyl cellulose is mixed with the part by weight of 6:1 with water, obtain mixed solution, and mixed solution is mixed by the part by weight of 4:1 with 80 object corundum sand, obtain smearing slurry;
2. the ceramic idiosome both ends of the surface after Vehicle Processing are with 1.7g/cm
2evenly brush and smear slurry;
3. ceramic idiosome and the pad sintered are put into the heating zone of tunnel sintering oven burner hearth, ceramic idiosome is coaxially placed on pad, and the top end face distance tunnel sintering oven roof of the furnace of ceramic idiosome is 30mm;
4. ceramic idiosome and pad is pushed to cooling zone from the heating zone of tunnel sintering oven burner hearth through heating zone, pottery idiosome is sintered into ceramic product in heating zone, the temperature of heating zone controls at 1540 DEG C, often push away and once namely push ahead 25mm, often push away once 5min consuming time, often push away and control at 45min an interval time, control at 12h by the always consuming time of heating zone, control at 3.2h by the always consuming time of heating zone, control at 16h by the always consuming time of cooling zone;
5. pad and ceramic product are pushed out from cooling zone, obtain annular ceramic product, and product internal diameter is 178.8mm.
(8) hole: carry out with digital controlled lathe the gate pole hole machined that silicon controlled rectifier plays trigger action, gate pole hole is 3.0mm to end face distance, and aperture is 1.5mm, degree of depth 3.5mm;
(9) clean: product and triangle abrasive material are put into oscillating mill with the ratio of 1.5:7 and after 15 minutes, clear water is poured into, after rinsing grinding, stay the impurity of product surface;
(10) flat stone mill: the height of product is worn into 17.5mm with grinding machine, the surface roughness Ra of product end flat is at 3 μm;
(11) pickling: work in-process being soaked in volumetric molar concentration is in the dilute hydrochloric acid solution of 1mol/L, soaks 30min and removes the impurity that work in-process adhere to, for glazing is ready;
(12) dry: put into baking oven 2h after product is placed in porcelain dish successively, the temperature of baking oven is 150 DEG C;
(13) glazing: use twin nipple glazing device at ceramic spraying one deck glaze water;
(14) gloss firing: the heating zone 1. ceramic body after glazing and the pad sintered being put into tunnel sintering oven burner hearth, ceramic body is coaxially placed on pad, and the top end face distance tunnel sintering oven roof of the furnace of ceramic body is 35mm;
2. ceramic body and pad is pushed to cooling zone from the heating zone of tunnel sintering oven burner hearth through heating zone, ceramic body is sintered into ceramic product in heating zone, the temperature of heating zone controls at 1530 DEG C, often push away and once namely push ahead 30mm, often push away once 5min consuming time, often push away and control at 50min an interval time, control at 12h by the always consuming time of heating zone, control at 4h by the always consuming time of heating zone, control at 18h by the always consuming time of cooling zone;
3. pad and ceramic product are pushed out from cooling zone, obtain annular ceramic product, and product internal diameter is 178.8mm, height 17.5mm.
Embodiment two:
(1) raw material ball milling: pour 94 parts by weight of alumina, 2 weight part silicon oxide, 1 weight parts of calcium carbonate, 2 parts by weight kaolin clay, 2 weight part magnesium oxide into ball mill, in raw material and ball mill, the mass ratio of ballstone is 4:1, add the binding agent PVA of raw material total mass 6%, the dispersion agent n-Octanol of raw material total mass 1% simultaneously, ball milling 22 hours, drum's speed of rotation 32r/min, obtains the slurry of viscosity 6020mpa.s;
(2) granulation: slurry adds centrifugal atomizer entrance, sprayer nozzle rotates with the frequency of 17Hz/RPM, the powder particle size obtained 98 ~ 220 μm;
(3) screen: powder is first through 90 object sieves and then through 150 object sieve screenings, and the powder particle size size obtained is 125 ~ 175 μm;
(4) homogenize: the powder after screening is put into homogenization machine and stirs 30min, homogenization machine rotating speed 20r/min; After homogenize, the opening for feed of homogenization machine and discharge port are provided with permanent bar magnet can to clear up the impurity such as the oxide compound of iron in powder and iron;
(5) shaping: to use isostatic pressing method shaping, the powder after screening is placed in mould, then mould is put into isostatic pressing machine, progressively pressurizeed by supercharging system, make the pressure-controlling of isostatic pressing machine at 240Mpa, obtain ceramic idiosome, operating environment temperature keeps 22 DEG C;
(6) Vehicle Processing: utilize lathe ceramic idiosome to be made required annular pottery idiosome, product internal diameter reaches 207.3mm;
(7) sinter: 1. carboxymethyl cellulose is mixed with the part by weight of 6.5:1 with water, obtain mixed solution, and mixed solution is mixed by the part by weight of 4.5:1 with 90 object corundum sand, obtain smearing slurry;
2. the ceramic idiosome both ends of the surface after Vehicle Processing are with 2g/cm
2evenly brush and smear slurry;
3. ceramic idiosome and the pad sintered are put into the heating zone of tunnel sintering oven burner hearth, ceramic idiosome is coaxially placed on pad, and the top end face distance tunnel sintering oven roof of the furnace of ceramic idiosome is 40mm;
4. ceramic idiosome and pad is pushed to cooling zone from the heating zone of tunnel sintering oven burner hearth through heating zone, pottery idiosome is sintered into ceramic product in heating zone, the temperature of heating zone controls at 1577 DEG C, often push away and once namely push ahead 27mm, often push away once 3min consuming time, often push away and control at 48min an interval time, control at 11h by the always consuming time of heating zone, control at 3.5h by the always consuming time of heating zone, control at 17h by the always consuming time of cooling zone;
5. pad and ceramic product are pushed out from cooling zone, obtain annular ceramic product, and product internal diameter is 180.2mm;
(8) hole: carry out with digital controlled lathe the gate pole hole machined that silicon controlled rectifier plays trigger action, gate pole hole is 3.0mm to end face distance, and aperture is 1.5mm, degree of depth 3.5mm;
(9) clean: product and triangle abrasive material are put into oscillating mill with the ratio of 1.5:7.5 and after 16 minutes, clear water is poured into, after rinsing grinding, stay the impurity of product surface;
(10) flat stone mill: the height of product is worn into 17.5mm with grinding machine, the surface roughness Ra of product end flat is at 3 μm;
(11) pickling: work in-process being soaked in volumetric molar concentration is in the dilute hydrochloric acid solution of 2mol/L, soaks 20min and removes the impurity that work in-process adhere to, for glazing is ready;
(12) dry: put into baking oven 3h after product is placed in porcelain dish successively, the temperature of baking oven is 135 DEG C;
(13) glazing: use twin nipple glazing device at ceramic spraying one deck glaze water;
(14) gloss firing: the heating zone 1. ceramic body after glazing and the pad sintered being put into tunnel sintering oven burner hearth, ceramic body is coaxially placed on pad, and the top end face distance tunnel sintering oven roof of the furnace of ceramic body is 30 ~ 50mm;
2. ceramic body and pad is pushed to cooling zone from the heating zone of tunnel sintering oven burner hearth through heating zone, ceramic body is sintered into ceramic product in heating zone, the temperature of heating zone controls at 1580 DEG C, often push away and once namely push ahead 20mm, often push away once 3min consuming time, often push away and control at 40min an interval time, control at 10h by the always consuming time of heating zone, control at 3h by the always consuming time of heating zone, control at 15h by the always consuming time of cooling zone;
3. pad and ceramic product are pushed out from cooling zone, obtain annular ceramic product, and product internal diameter is 180.2mm, height 17.5mm.
Embodiment three:
(1) raw material ball milling: pour 93 parts by weight of alumina, 3 weight part silicon oxide, 2 weight parts of calcium carbonate, 3 parts by weight kaolin clay, the magnesian raw material of 2.5 weight part into ball mill, in raw material and ball mill, the mass ratio of ballstone is 5:1, add the binding agent PVA of raw material total mass 5.5%, the dispersion agent n-Octanol of raw material total mass 1.5% simultaneously, ball milling 24 hours, drum's speed of rotation 33r/min, obtains the slurry of viscosity 6012mpa.s;
(2) granulation: slurry adds centrifugal atomizer entrance, sprayer nozzle rotates with the frequency of 18Hz/RPM, the powder particle size obtained 98 ~ 220 μm;
(3) screen: first through 80 object sieves and then through 160 object sieve screenings, the powder particle size size obtained is 125 ~ 175 μm;
(4) homogenize: the powder after granulation is put into homogenization machine and stir 31min, homogenization machine rotating speed 18r/min; The opening for feed of homogenization machine and discharge port are provided with permanent bar magnet can clear up the impurity such as the oxide compound of iron in powder and iron;
(5) shaping: use isostatic pressing method shaping, the powder after screening is placed in mould, then mould is put into isostatic pressing machine, progressively pressurizeed by supercharging system, make the pressure of isostatic pressing machine be 238Mpa, obtain ceramic idiosome, operating environment temperature keeps 24 DEG C;
(6) Vehicle Processing: utilize lathe ceramic idiosome to be made required annular pottery idiosome, product internal diameter reaches 208.5mm;
(7) sinter:
1. carboxymethyl cellulose is mixed with the part by weight of 5.5:1 with water, obtain mixed solution, and mixed solution is mixed by the part by weight of 4.5:1 with 90 object corundum sand, obtain smearing slurry;
2. the ceramic idiosome both ends of the surface after Vehicle Processing are with 2.4g/cm
2evenly brush and smear slurry;
3. ceramic idiosome and the pad sintered are put into the heating zone of tunnel sintering oven burner hearth, ceramic idiosome is coaxially placed on pad, and the top end face distance tunnel sintering oven roof of the furnace of ceramic idiosome is 30 ~ 50mm;
4. ceramic idiosome and pad is pushed to cooling zone from the heating zone of tunnel sintering oven burner hearth through heating zone, pottery idiosome is sintered into ceramic product in heating zone, the temperature of heating zone controls at 1560 DEG C, often push away and once namely push ahead 26mm, often push away once 4min consuming time, often push away and control at 46min an interval time, control at 11h by the always consuming time of heating zone, control at 3.5h by the always consuming time of heating zone, control at 17h by the always consuming time of cooling zone;
5. pad and ceramic product are pushed out from cooling zone, obtain annular ceramic product, and product internal diameter is 181.3mm.
(8) hole: carry out with digital controlled lathe the gate pole hole machined that silicon controlled rectifier plays trigger action, gate pole hole is 3.5mm to end face distance, and aperture is 2.0mm, degree of depth 4.0mm;
(9) clean: product and triangle abrasive material are put into oscillating mill with the ratio of 1.5:8 and after 15 minutes, clear water is poured into, after rinsing grinding, stay the impurity of product surface;
(10) flat stone mill: the height of product is worn into 17.7mm with grinding machine, the surface roughness Ra of product end flat is at 3.5 μm;
(11) pickling: work in-process being soaked in volumetric molar concentration is in the dilute hydrochloric acid solution of 2mol/L, soaks 20min and removes the impurity that work in-process adhere to, for glazing is ready;
(12) dry: put into baking oven 2h after product is placed in porcelain dish successively, the temperature of baking oven is 140 DEG C;
(13) glazing: use twin nipple glazing device at ceramic spraying one deck glaze water;
(14) gloss firing: the heating zone 1. ceramic body after glazing and the pad sintered being put into tunnel sintering oven burner hearth, ceramic body is coaxially placed on pad, and the top end face distance tunnel sintering oven roof of the furnace of ceramic body is 30 ~ 50mm;
2. ceramic body and pad is pushed to cooling zone from the heating zone of tunnel sintering oven burner hearth through heating zone, ceramic body is sintered into ceramic product in heating zone, the temperature of heating zone controls at 1560 DEG C, often push away and once namely push ahead 25mm, often push away once 4min consuming time, often push away and control at 45min an interval time, control at 11h by the always consuming time of heating zone, control at 3.5h by the always consuming time of heating zone, control at 16h by the always consuming time of cooling zone;
3. pad and ceramic product are pushed out from cooling zone, obtain annular ceramic product, and product internal diameter is 181.3mm, height 17.7mm.
Claims (10)
1. a preparation method for silicon controlled rectifier 180mm internal diameter product, is characterized in that: comprise the steps:
(1) raw material ball milling: get 93 ~ 94 parts by weight of alumina, 1.5 ~ 2.5 weight part magnesium oxide, 2 ~ 4 weight part silicon oxide, 1 ~ 2 weight parts of calcium carbonate, 2 ~ 3 parts by weight kaolin clay are that raw material is poured in ball mill, and adding adhesive phenolic resin and dispersion agent n-Octanol in the feed successively, ball milling obtains the slurry that viscosity is 6000 ~ 6009mpa.s;
(2) granulation: the slurry after ball milling is added centrifugal atomizer entrance, sprayer nozzle rotates with the frequency of 16 ~ 18Hz/RPM, and the powder particle size obtained is 98 ~ 220 μm;
(3) screen: screening obtains the powder that size is 125 ~ 175 μm;
(4) homogenize: the powder after screening is put into homogenization machine and stirs 30 ~ 32min, homogenization machine rotating speed 16 ~ 20r/min, the opening for feed of homogenization machine and discharge port are provided with permanent bar magnet can clear up the impurity such as the oxide compound of iron in powder and iron;
(5) shaping: to use isostatic pressing method shaping, the powder after screening is placed in mould, then mould is put into isostatic pressing machine, progressively pressurizeed by supercharging system, make the pressure-controlling of isostatic pressing machine at 236 ~ 240Mpa, obtain ceramic idiosome;
(6) Vehicle Processing: with lathe, ceramic idiosome is made required annular pottery idiosome, product internal diameter reaches 205.5 ~ 208.5mm;
(7) sinter: the ceramic idiosome both ends of the surface after Vehicle Processing are with 1.7 ~ 2.4g/cm
2evenly brush and smear slurry, ceramic idiosome and the pad sintered are put into the heating zone of tunnel sintering oven burner hearth, pottery idiosome is coaxially placed on pad, the top end face distance tunnel sintering oven roof of the furnace of pottery idiosome is 30 ~ 50mm, ceramic idiosome and pad is pushed to cooling zone through heating zone from the heating zone of tunnel sintering oven burner hearth, the annular ceramic semi-finished product that internal diameter is 178.8 ~ 181.3mm is obtained after having sintered;
(8) hole: carry out with digital controlled lathe the gate pole hole machined that silicon controlled rectifier plays trigger action, gate pole hole is 3.0 ~ 3.5mm to end face distance, and aperture is 1.0 ~ 2.0mm, the degree of depth 3.5 ~ 4.0mm;
(9) clean: work in-process and triangle abrasive material are put into oscillating mill with the ratio of 1.5:7 ~ 8 and after 15 ~ 18 minutes, clear water is poured into, after rinsing grinding, stay the impurity of product surface;
(10) flat stone mill: the height of product is worn into 17.5 ~ 17.7mm with grinding machine, the surface roughness Ra of work in-process end flat is at 3 ~ 3.5 μm;
(11) pickling: work in-process being soaked in volumetric molar concentration is in the dilute hydrochloric acid solution of 1 ~ 2mol/L, soaks 20 ~ 30min and removes the impurity that work in-process adhere to, for glazing is ready;
(12) dry: put into baking oven 2 ~ 3h after work in-process being placed in porcelain dish, the temperature of baking oven is 135 ~ 150 DEG C;
(13) glazing: spray one deck glaze water on work in-process;
(14) gloss firing: the heating zone ceramic body after glazing and the pad sintered being put into tunnel sintering oven burner hearth, ceramic body is coaxially placed on pad, the top end face distance tunnel sintering oven roof of the furnace of ceramic body is 30 ~ 50mm, ceramic body and pad is pushed to cooling zone through heating zone from the heating zone of tunnel sintering oven burner hearth, carry out gloss firing process, terminate to obtain annular ceramic product, product internal diameter is 178.8 ~ 181.3mm, height 17.5 ~ 17.7mm.
2. the preparation method of silicon controlled rectifier 180mm internal diameter product as claimed in claim 1, it is characterized in that: the add-on of described adhesive phenolic resin is 5 ~ 6% of raw material total mass, the add-on of dispersion agent n-Octanol is 1.1 ~ 1.4% of raw material total mass.
3. the preparation method of silicon controlled rectifier 180mm internal diameter product as claimed in claim 1, is characterized in that:
The preparation method smearing slurry in described step (7) is: mixed with the part by weight of 6 ~ 6.5:1 with water by carboxymethyl cellulose, obtain mixed solution, and husky to mixed solution and 80 ~ 90 object corundum to be mixed to get by the part by weight of 4 ~ 5:1.5 is smeared slurry.
4. the preparation method of silicon controlled rectifier 180mm internal diameter product as claimed in claim 1, is characterized in that:
Described in described step (7), ceramic idiosome is sintered into ceramic product in heating zone, the temperature of heating zone controls at 1540 ~ 1577 DEG C, ceramic idiosome is advanced to heating zone continuously from heating zone, often push away and once namely push ahead 25 ~ 27mm, often push away once 3 ~ 5min consuming time, often push away and control at 45 ~ 48min an interval time, control at 11 ~ 12h by the always consuming time of heating zone, control at 3.2 ~ 3.5h by the always consuming time of heating zone, controlled at 16 ~ 17h by the always consuming time of cooling zone.
5. the preparation method of silicon controlled rectifier 180mm internal diameter product as claimed in claim 1, is characterized in that:
Ceramic body and pad is pushed to cooling zone from the heating zone of tunnel sintering oven burner hearth through heating zone in described step (12), ceramic body is sintered into ceramic product in heating zone, the temperature of heating zone controls at 1530 ~ 1580 DEG C, often push away and once namely push ahead 20 ~ 30mm, often push away once 3 ~ 5min consuming time, often push away and control at 40 ~ 50min an interval time, control at 10 ~ 12h by the always consuming time of heating zone, control at 3 ~ 4h by the always consuming time of heating zone, controlled at 15 ~ 18h by the always consuming time of cooling zone.
6. the preparation method of silicon controlled rectifier 180mm internal diameter product as claimed in claim 1, is characterized in that:
First through 80 ~ 90 object sieves and then through 150 ~ 160 object sieve screenings in described step (4).
7. the preparation method of silicon controlled rectifier 180mm internal diameter product as claimed in claim 1, is characterized in that: in described step (5), the operating environment temperature of isostatic pressing machine is 22 ~ 24 DEG C.
8. the preparation method of silicon controlled rectifier 180mm internal diameter product as claimed in claim 1, is characterized in that: in described step (1) Raw and ball mill, the mass ratio of ballstone is 4 ~ 4.5:1, ball milling 25 ~ 30 hours, drum's speed of rotation 31 ~ 32r/min.
9. the preparation method of silicon controlled rectifier 180mm internal diameter product as claimed in claim 1, is characterized in that: in described step (7), after sintering, the deformation rate of product is 5 ‰ ~ 8 ‰.
10. the preparation method of silicon controlled rectifier 180mm internal diameter product as claimed in claim 1, it is characterized in that: the thickness 15 ~ 16mm of described step (7) Intermediate gasket, in sintering oven, the heating zone temperature difference be positioned on sea line between 3 controls at 1 ~ 6 DEG C.
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| CN110218082A (en) * | 2019-06-18 | 2019-09-10 | 陈彦霖 | A kind of low-temperature sintering MH type Corundum Ceramics ball and preparation method thereof |
| CN116438151A (en) * | 2020-11-05 | 2023-07-14 | 京瓷株式会社 | Ceramic structure with glaze layer |
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