CN103722481A - Method for grinding zinc oxide voltage dependent resistor porcelain sheet - Google Patents
Method for grinding zinc oxide voltage dependent resistor porcelain sheet Download PDFInfo
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- CN103722481A CN103722481A CN201310659552.9A CN201310659552A CN103722481A CN 103722481 A CN103722481 A CN 103722481A CN 201310659552 A CN201310659552 A CN 201310659552A CN 103722481 A CN103722481 A CN 103722481A
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- zinc
- oxide piezoresistor
- ceramics
- zinc oxide
- voltage dependent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/02—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving rotary barrels
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Thermistors And Varistors (AREA)
Abstract
The invention discloses a method for grinding a zinc oxide voltage dependent resistor porcelain sheet. The method comprises the following steps that (1), the well sintered zinc oxide voltage dependent resistor porcelain sheet is put into a cylindrical roller, wherein the loose volume of the zinc oxide voltage dependent resistor porcelain sheet accounts for 85-95% of the volume of the roller; (2), water is added into the cylindrical roller to submerge the zinc oxide voltage dependent resistor porcelain sheet; (3), padding of a zinc oxide voltage dependent resistor is added into the cylindrical roller; (4), a sealing cover of the roller is closed well, the roller is placed on a tumbling mill, and then the zinc oxide voltage dependent resistor porcelain sheet is grinded in the roller for 3-10 minutes; (5), the grinded porcelain sheet is sieved through a sieve with 5-10 meshes, the padding on the porcelain sheet is washed completely to be clean through tap water, and sediment powder which is sieved is recycled; (6), the grinded porcelain sheet which is washed clean is completely dried, wherein the temperature of an oven is controlled to range from 100 DEG C to 170 DEG C. The method is simple in process, high in grinding efficiency and low in cost, almost has no effect on the electricity property and the electrical property of the zinc oxide voltage dependent resistor, and is suitable for large-sale industrial production, and the percent of pass of the grinded sheet is more than 99.5%.
Description
Technical field
What the present invention relates to is a kind of method of Zinc-oxide piezoresistor abrasive disc, belongs to electronic devices and components manufacturing technology field.
Background technology
Since entering 21 century, the high speed development of electronic information technology constantly proposes new requirement to electronic devices and components technology.< < China Electronics Components Industry market analysis consultation report > > research in 2012 shows, expect 2015, China's electronic devices and components total output will reach 5,000,000,000,000, income from sales reaches 5 trillion yuan, resistance, electric capacity, inductance chip rate reach 90%, electronic devices and components international market occupation rate reaches 50%, and domestic market occupation rate reaches 70%.But current China electronic devices and components industrial structure is still take mid and low-end products as main, the competitive advantage of enterprise is based upon in labour and resource substantially, and therefore the average profit of whole industry is not high, and industry development does not also rise to advanced stage.Secondly, the capacity of scientific research exists obvious gap compared with world standard with level, change the present situation of the low side of China Electronics Components Industry industry in value distribution claim, just must carry out innovation, commercial processes innovation, make the product of producing reach advanced level.Zinc-oxide piezoresistor product will be positioned at high-end, with quality control quality, keep cost advantage to occupy international market, to on composition of raw materials, focus on properties of product on the one hand, must in large-scale production process, improve on the other hand technique, find production convenient, with low cost, the properties of product that produce good new technology again, increases industrial competition.The method of conventional Zinc-oxide piezoresistor abrasive disc, the one, if the patent No. is 200820058677.0, the ceramic material abrasive disc device that name is called metallographical polishing machine carries out abrasive disc, and abrasive disc efficiency is poor, is unfavorable for suitability for industrialized production.The 2nd, utilize double face abrading machine to carry out abrasive disc to Zinc-oxide piezoresistor, because Zinc-oxide piezoresistor sintering rear surface is attached with bedding and padding, it is not very smooth causing surface, in abrasive disc process, can produce larger heat on ceramic partially surface, destroy the local crystal boundary that it has semiconductor function, thereby cause piezo-resistance electric property and electric property deteriorated, cause qualification rate not high.Chen Xiao has proposed at Information 05 phase < < Zinc-oxide piezoresistor abrasive disc process modification > > in 2007 method that Double End grinding technics runs through feeding and continuous grinding and has realized the grinding to resistor disc, eliminated colliding with of edge, there is excellent cost performance, but this technique still plays bad effect to piezo-resistance nonlinear factor and leakage current.Therefore aspect product processes, also has very large technological improvement space.
Summary of the invention
The object of the present invention is to provide a kind of method of Zinc-oxide piezoresistor abrasive disc, utilize ceramics phase mutual friction in water with ceramics, in cylinder, the Action of Gravity Field of ceramics is as the power of friction, bedding and padding are as buffer medium, can effectively overcome the local excessive friction producing and cause electric property and the deteriorated deficiency of electric property in process of lapping, and technique is simple, abrasive disc efficiency is high, cost is low, and abrasive disc qualification rate is high.
To achieve these goals, the present invention has taked following technical scheme:
A method for Zinc-oxide piezoresistor abrasive disc, comprises following concrete steps: (1) puts into rotatingcylindrical drum by the Zinc-oxide piezoresistor ceramics sintering, and its loose volume accounts for 85% ~ 95% of cylinder volume; (2) in rotatingcylindrical drum, add water, flood Zinc-oxide piezoresistor ceramics; (3) to the bedding and padding that add Zinc-oxide piezoresistor in rotatingcylindrical drum, add bedding and padding and Zinc-oxide piezoresistor weight ratio be 0 ~ 5:2-8; (4) cylinder sealing is built, put to tumbling mill and carry out cylinder abrasive disc 3 ~ 10 minutes; (5) ceramics having ground is crossed to 5 ~ 10 mesh sieves, the bedding and padding on ceramics are rinsed well completely with running water, and reclaim the precipitation powder that sieves and; (6) by having ground the ceramics of rinsing well, pack pallet into, place baking oven until dry completely, oven temperature scope control is at 100 ℃ ~ 170 ℃.
The surface attachment of the Zinc-oxide piezoresistor ceramics sintering in described step (1) has a small amount of bedding and padding; Rotatingcylindrical drum inner wall coarse in described step (1); In described step (1), Zinc-oxide piezoresistor ceramics is that diameter is the cake type piezoresistive wafer of 5mm ~ 25mm.In described step (3) bedding and padding of Zinc-oxide piezoresistor be by the powder after Zinc-oxide piezoresistor granulation through 550 ℃ ~ 650 ℃ binder removals 1 ~ 4 hour, then the porcelain body particle forming after sintering for 2 ~ 6 hours 1050 ℃ ~ 1150 ℃ insulations.In described step (5), precipitation powder is bedding and padding and the Zinc-oxide piezoresistor ceramics porcelain body powder that abrasive disc produces in step (4) adding in step (3).
Take the present invention of above-mentioned measure to there is following characteristics:
(1) the present invention utilizes ceramics phase mutual friction in water with ceramics, in cylinder, the Action of Gravity Field of ceramics is as the power of friction, bedding and padding are as buffer medium, can effectively overcome the local excessive friction producing in process of lapping cause electric property and electric property deteriorated, make piezoresistive wafer keep original electric property and electric property constant.
(2) technique of the present invention is simple, and abrasive disc efficiency is high, and cost is low, and the qualification rate of abrasive disc reaches more than 99.5%, is applicable to mass industrialized production.
The specific embodiment
Below in conjunction with embodiment, the invention will be further described.It is pointed out that, according to technical scheme of the present invention, following embodiment can also enumerate many, the results show a large amount of according to applicant, within the scope of technical scheme of the present invention, all can reach object of the present invention.
embodiment 1
1. by the diameter sintering, be 5mm model be the Zinc-oxide piezoresistor ceramics of 5D271K to put into internal diameter be 40cm, in the rotatingcylindrical drum that length is 45cm, wherein the loose volume of ceramics accounts for 85% of cylinder volume;
2. in rotatingcylindrical drum, add running water, flood Zinc-oxide piezoresistor ceramics;
3. cylinder sealing is built, put to tumbling mill and carry out cylinder abrasive disc 3 minutes;
4. the ceramics having ground is crossed to 10 eye mesh screens, ceramics is rinsed well completely with running water, and reclaim the precipitation powder that sieves and;
5. by having ground the ceramics of rinsing well, pack pallet into, place in 100 ℃ of baking ovens until oven dry completely can obtain surfacing, the product of thickness homogeneous.Finished product electric property and electric property that the qualification rate of product and product obtain through surface metalation, after welding, sealing see the following form 1.
embodiment 2
1.take the powder 200g after Zinc-oxide piezoresistor granulation, put it in sintering alms bowl, then sintering alms bowl is put into resistance furnace, after 4 hours binder removals of 550 ℃ of insulations, then at 6 hours sintering of 1050 ℃ of insulations, with stove, lower the temperature, obtain Zinc-oxide piezoresistor porcelain body particle, standby as bedding and padding.
2. by the diameter sintering, be 10mm model be the Zinc-oxide piezoresistor ceramics of 10D471K to put into internal diameter be 40cm, in the rotatingcylindrical drum that length is 45cm, wherein the loose volume of ceramics accounts for 90% of cylinder volume;
3. in rotatingcylindrical drum, add running water, flood Zinc-oxide piezoresistor ceramics;
4. in rotatingcylindrical drum, add the Zinc-oxide piezoresistor bedding and padding 100g in step 1;
5. cylinder sealing is built, put to tumbling mill and carry out cylinder abrasive disc 10 minutes;
6. the ceramics having ground is crossed to 10 eye mesh screens, ceramics is rinsed well completely with running water, and reclaim the precipitation powder that sieves and;
7. by having ground the ceramics of rinsing well, pack pallet into, place in 120 ℃ of baking ovens until oven dry completely can obtain surfacing, the product of thickness homogeneous.Finished product electric property and electric property that the qualification rate of product and product obtain through surface metalation, after welding, sealing see the following form 1.
embodiment 3
1.take the powder 400g after Zinc-oxide piezoresistor granulation, put it in sintering alms bowl, then sintering alms bowl is put into resistance furnace, after 3 hours binder removals of 600 ℃ of insulations, then at 4 hours sintering of 1100 ℃ of insulations, with stove, lower the temperature, obtain Zinc-oxide piezoresistor porcelain body particle, standby as bedding and padding.
2. by the diameter sintering, be 14mm model be the Zinc-oxide piezoresistor ceramics of 14D681K to put into internal diameter be 40cm, in the rotatingcylindrical drum that length is 45cm, wherein the loose volume of ceramics accounts for 93% of cylinder volume;
3. in rotatingcylindrical drum, add running water, flood Zinc-oxide piezoresistor ceramics;
4. in rotatingcylindrical drum, add the Zinc-oxide piezoresistor bedding and padding 200g in step 1;
5. cylinder sealing is built, put to tumbling mill and carry out cylinder abrasive disc 5 minutes;
6. the ceramics having ground is crossed to 10 eye mesh screens, ceramics is rinsed well completely with running water, and reclaim the precipitation powder that sieves and;
7. by having ground the ceramics of rinsing well, pack pallet into, place in 150 ℃ of baking ovens until oven dry completely can obtain surfacing, the product of thickness homogeneous.Finished product electric property and electric property that the qualification rate of product and product obtain through surface metalation, after welding, sealing see the following form 1.
embodiment 4
1.take the powder 800g after Zinc-oxide piezoresistor granulation, put it in sintering alms bowl, then sintering alms bowl is put into resistance furnace, after 2 hours binder removals of 650 ℃ of insulations, then at 2 hours sintering of 1150 ℃ of insulations, with stove, lower the temperature, obtain Zinc-oxide piezoresistor porcelain body particle, standby as bedding and padding.
2. by the diameter sintering, be 20mm model be the Zinc-oxide piezoresistor ceramics of 20D681K to put into internal diameter be 40cm, in the rotatingcylindrical drum that length is 45cm, wherein the loose volume of ceramics accounts for 95% of cylinder volume;
3. in rotatingcylindrical drum, add running water, flood Zinc-oxide piezoresistor ceramics;
4. in rotatingcylindrical drum, add the Zinc-oxide piezoresistor bedding and padding 500g in step 1;
5. cylinder sealing is built, put to tumbling mill and carry out cylinder abrasive disc 5 minutes;
6. the ceramics having ground is crossed to 10 eye mesh screens, ceramics is rinsed well completely with running water, and reclaim the precipitation powder that sieves and;
7. by having ground the ceramics of rinsing well, pack pallet into, place in 170 ℃ of baking ovens until oven dry completely can obtain surfacing, the product of thickness homogeneous.Finished product electric property and electric property that the qualification rate of product and product obtain through surface metalation, after welding, sealing see the following form 2.
embodiment 5
1.take the powder 800g after Zinc-oxide piezoresistor granulation, put it in sintering alms bowl, then sintering alms bowl is put into resistance furnace, after 1 hour binder removal of 650 ℃ of insulations, then at 3 hours sintering of 1150 ℃ of insulations, with stove, lower the temperature, obtain Zinc-oxide piezoresistor porcelain body particle, standby as bedding and padding.
2. by the diameter sintering, be 25mm model be the Zinc-oxide piezoresistor ceramics of 25D561K to put into internal diameter be 40cm, in the rotatingcylindrical drum that length is 45cm, wherein the loose volume of ceramics accounts for 95% of cylinder volume;
3. in rotatingcylindrical drum, add running water, flood Zinc-oxide piezoresistor ceramics;
4. in rotatingcylindrical drum, add the Zinc-oxide piezoresistor bedding and padding 500g in step 1;
5. cylinder sealing is built, put to tumbling mill and carry out cylinder abrasive disc 5 minutes;
6. the ceramics having ground is crossed to 5 eye mesh screens, ceramics is rinsed well completely with running water, and reclaim the precipitation powder that sieves and;
7. by having ground the ceramics of rinsing well, pack pallet into, place in 170 ℃ of baking ovens until oven dry completely can obtain surfacing, the product of thickness homogeneous.Finished product electric property and electric property that the qualification rate of product and product obtain through surface metalation, after welding, sealing see the following form 2.
Product percent of pass after table 1 abrasive disc and electricity electric property thereof
Note: composite wave number of shocks ± 10 time, represent after positive direction bump 10 times bump in the other direction 10 times.Comparative example is to adopt the current advanced existing grinding techniques such as Double End grinding to grind the Zinc-oxide piezoresistor ceramics sintering.
Product percent of pass after table 2 abrasive disc and electricity electric property thereof
Note: composite wave number of shocks ± 10 time, represent after positive direction bump 10 times bump in the other direction 10 times.Comparative example is to adopt the current advanced existing grinding techniques such as Double End grinding to grind the Zinc-oxide piezoresistor ceramics sintering.
From above-mentioned test result, the property indices of the zinc oxide varistor that the present invention grinds is all better than the zinc oxide varistor that existing grinding technique grinds out.
Claims (4)
1. a method for Zinc-oxide piezoresistor abrasive disc, is characterized in that, comprises following concrete steps: (1) puts into rotatingcylindrical drum by the Zinc-oxide piezoresistor ceramics sintering, and its loose volume accounts for 85% ~ 95% of cylinder volume; (2) in rotatingcylindrical drum, add running water, flood Zinc-oxide piezoresistor ceramics; (3) to the bedding and padding 0 ~ 500g that adds Zinc-oxide piezoresistor in rotatingcylindrical drum; (4) cylinder sealing is built, put to tumbling mill and carry out cylinder abrasive disc 3 ~ 10 minutes; (5) ceramics having ground is crossed to 5 ~ 10 mesh sieves, the bedding and padding on ceramics are rinsed well completely with running water, and reclaim the precipitation powder that sieves and; (6) by having ground the ceramics of rinsing well, pack pallet into, place baking oven until dry completely, oven temperature scope control is at 100 ℃ ~ 170 ℃.
2. the method for Zinc-oxide piezoresistor abrasive disc according to claim 1, is characterized in that rotatingcylindrical drum inner wall coarse.
3. the method for Zinc-oxide piezoresistor abrasive disc according to claim 1, is characterized in that Zinc-oxide piezoresistor ceramics is that diameter is the cake type piezoresistive wafer of 5mm ~ 25mm.
4. the method for Zinc-oxide piezoresistor abrasive disc according to claim 1, the bedding and padding that it is characterized in that Zinc-oxide piezoresistor be by the powder after Zinc-oxide piezoresistor granulation through 550 ℃ ~ 650 ℃ binder removals 1 ~ 4 hour, 1050 ℃ ~ 1150 ℃ sintering porcelain body particle after 2 ~ 6 hours.
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| CN201310659552.9A CN103722481B (en) | 2013-12-10 | 2013-12-10 | A kind of method of Zinc-oxide piezoresistor abrasive disc |
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| CN201310659552.9A CN103722481B (en) | 2013-12-10 | 2013-12-10 | A kind of method of Zinc-oxide piezoresistor abrasive disc |
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| CN103722481B CN103722481B (en) | 2016-02-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108818156A (en) * | 2018-05-24 | 2018-11-16 | 江苏时瑞电子科技有限公司 | A kind of method of Zinc-oxide piezoresistor grinding |
| CN113696087A (en) * | 2021-10-07 | 2021-11-26 | 广西新未来信息产业股份有限公司 | Vibration grinding disc cleaning process for piezoresistor ceramic chip |
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|---|---|---|---|---|
| US2806334A (en) * | 1955-10-10 | 1957-09-17 | Erie Resistor Corp | Bevelling of cylinders |
| JPS63156654A (en) * | 1986-12-19 | 1988-06-29 | Shintou Bureetaa Kk | Barrel polishing device |
| JPH01191402A (en) * | 1988-01-27 | 1989-08-01 | Toshiba Corp | Manufacture of voltage nonlinear resistor |
| CN2930961Y (en) * | 2006-08-23 | 2007-08-08 | 南阳金冠电气有限公司 | Piezoresistive wafer double-surface grinding machine |
| CN203141271U (en) * | 2012-12-30 | 2013-08-21 | 南阳金牛电气有限公司 | Polishing machine for zinc oxide resistor discs |
| CN203141292U (en) * | 2012-12-30 | 2013-08-21 | 南阳金牛电气有限公司 | Sintering bowl grinding device for zinc oxide resistor discs |
| CN203317203U (en) * | 2013-05-16 | 2013-12-04 | 扬州发运电气有限公司 | Resistor disc grinding machine |
-
2013
- 2013-12-10 CN CN201310659552.9A patent/CN103722481B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2806334A (en) * | 1955-10-10 | 1957-09-17 | Erie Resistor Corp | Bevelling of cylinders |
| JPS63156654A (en) * | 1986-12-19 | 1988-06-29 | Shintou Bureetaa Kk | Barrel polishing device |
| JPH01191402A (en) * | 1988-01-27 | 1989-08-01 | Toshiba Corp | Manufacture of voltage nonlinear resistor |
| CN2930961Y (en) * | 2006-08-23 | 2007-08-08 | 南阳金冠电气有限公司 | Piezoresistive wafer double-surface grinding machine |
| CN203141271U (en) * | 2012-12-30 | 2013-08-21 | 南阳金牛电气有限公司 | Polishing machine for zinc oxide resistor discs |
| CN203141292U (en) * | 2012-12-30 | 2013-08-21 | 南阳金牛电气有限公司 | Sintering bowl grinding device for zinc oxide resistor discs |
| CN203317203U (en) * | 2013-05-16 | 2013-12-04 | 扬州发运电气有限公司 | Resistor disc grinding machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108818156A (en) * | 2018-05-24 | 2018-11-16 | 江苏时瑞电子科技有限公司 | A kind of method of Zinc-oxide piezoresistor grinding |
| CN113696087A (en) * | 2021-10-07 | 2021-11-26 | 广西新未来信息产业股份有限公司 | Vibration grinding disc cleaning process for piezoresistor ceramic chip |
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| CN103722481B (en) | 2016-02-24 |
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