CN101704668A - ZnO ceramic resistor and preparation method thereof - Google Patents
ZnO ceramic resistor and preparation method thereof Download PDFInfo
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- CN101704668A CN101704668A CN200910219295A CN200910219295A CN101704668A CN 101704668 A CN101704668 A CN 101704668A CN 200910219295 A CN200910219295 A CN 200910219295A CN 200910219295 A CN200910219295 A CN 200910219295A CN 101704668 A CN101704668 A CN 101704668A
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Abstract
The invention relates to a ZnO ceramic resistor and a preparation method thereof. The method comprises the following steps: based on arbitrary proportion by weight percentage, carrying out dry-process mixing and ball milling to 0.2-20 percent of TiO2, 0.2-20 percent of MgO and 0.2-10 percent of one or more of Sb2O3, Al2O3, Y2O3, CaO, SiO2, SnO2 and ZrO2 according to the preparation technology of traditional ceramic to obtain a complex additive, and then using a high-energy ball milling pre-synthesizing method to make the complex additive and ZnO into a ZnO ceramic resistor material. The method ensures the uniform distribution of all additives, thus improving the comprehensive performance of the resistor material which has wide resistance rang and stable performance and is beneficial to industrial production.
Description
Technical field
The invention belongs to material science, particularly a kind of ZnO ceramic resistor and preparation method thereof.
Background technology
Along with electronics, development of electric power industry, more and more higher to the requirement of all many-sides such as reliability, economy and miniaturization of power equipment.Ceramic resistor resistivity is high more a lot of than metallic resistance resistivity, can realize reducing resistance weight under the similar resistance, reduces volume and floor space, realizes lightweight, miniaturization.At present, using morely is to be the ceramic resistor of main raw material preparation with aluminum oxide, clay and carbon, but shortcoming such as that this system resistance exists is big as temperature coefficient of resistance, use temperature is low, poor stability and energy density are low.In recent years, the ceramic resistor based on zinc oxide that grows up has obtained application because of its performance is significantly improved in SP6 isolating switch, neutral resistor, the fields such as energy resistance, contactless measurement of releasing.
At present, the main raw material of preparation ZnO ceramic resistor is a zinc oxide, magnesium oxide, and aluminum oxide etc. in addition, add a small amount of other additive, through mixing, fine grinding, granulation, compacting, technologies such as sintering are synthetic.Because this product additive therefor is in the exploratory stage at present, its mechanism of action is understood as yet fully, and therefore, different investigators and producer improve but its over-all properties is very difficult with dissimilar additive types; Chinese patent 96123503.9 provides a kind of method of prepared in laboratory ZnO resistors, but this complex process is difficult to realize industrialization production, and simultaneously, its performance is difficult to satisfy the requirement of power industry to resistance; Patent 02140486.0 provides a kind of can carry out mass-produced ZnO resistors production technique, but because additive types is many, and content is few, and this technology is difficult to make each additive uniform distribution, thereby cause product performance stability to produce, yield rate is difficult to improve.
Summary of the invention
In order to overcome the defective of above-mentioned prior art, the object of the present invention is to provide a kind of ZnO ceramic resistor and preparation method thereof, utilize the pre-synthesis method of composite additive high-energy ball milling to prepare the ZnO ceramic resistor material, this method has guaranteed the uniform distribution of each additive, thereby improved the over-all properties of this resistive material, its resistance range is big, and stable performance is easy to industrialization production.
In order to achieve the above object, technical scheme of the present invention is achieved in that
A kind of ZnO ceramic resistor material, its raw material are formed: ZnO accounts for the 60-95% of total amount, TiO
2Account for the 0.2-20% of gross weight, MgO accounts for the 0.2-20% of gross weight, and all the other compositions are Sb
2O
3, Al
2O
3, Y
2O
3, CaO, SiO
2, SnO
2, ZrO
2In one or more, ratio is any, accounts for the 0.2-10% of gross weight.
A kind of preparation method of ZnO ceramic resistor may further comprise the steps:
One, will account for the TiO of raw material gross weight 0.2-20%
2, the MgO of 0.2-20%, the Sb of 0.2-10%
2O
3, Al
2O
3, Y
2O
3, CaO, SiO
2, SnO
2, ZrO
2In one or more, ratio is any, preparation technology by traditional ceramics carries out dry mixed, ball milling, and wherein, the balls grinding media is the zirconium white ballstone, material, ball mass ratio are 1: 2, ball milling 2-3 hour, the gained powder was contained in the aluminum oxide saggar with 200 ℃ temperature rise rate per hour and burns to 700 ℃, and insulation 2-3 hour, naturally cool to room temperature then, obtain composite additive;
Two, the composite additive with gained in the step 1 adopts Stainless Steel Ball, nylon jar to add ethanol and carry out high-energy ball milling on planetary high-energy ball mill, drum's speed of rotation is 500-800 rev/min, ball, powder mass ratio are 20: 1, after ball milling 5-9 hour, slurry is carried out deironing and drying by the traditional ceramics material preparation process;
Three, composite additive and the ZnO powder with gained in the step 2 mixes by weight, wherein the consumption of composite additive accounts for total amount (5-40) %, the consumption of ZnO accounts for total amount (60-95) %, with zirconia ball is ball-milling medium, and the polyvinyl alcohol water solution that adds raw material total mass 2% carries out making in ball milling 1-3 hour slurry;
Four, slurry that step 3 is prepared carries out mist projection granulating by the technology of traditional ceramics and carries out dry-pressing formedly, and the biscuit volume density is 3.1-3.3g/cm
3
Five, institute's molding blank in the step 4 is burnt 1280-1340 ℃ with 3 ℃/minute temperature rise rate, be incubated 2-3 hour, afterwards with 50-100 ℃/hour rate of temperature fall cool to room temperature;
Six, institute in the step 5 is polished on the sintered specimen surface, aluminium-plated electrode promptly makes required ceramic resistor.
The present invention utilizes the zinc oxide ceramics resistance of composite additive and the pre-synthesis technique preparation of additive, has the over-all properties height, and resistance range is big, and stable performance is easy to the characteristics that industrialization is produced.
Its performance index are:
Resistivity: 40-2500 Ω cm;
Temperature coefficient of resistance :≤± 5 * 10
-3/ ℃ (20-500 ℃);
Energy tolerance: 500-800J/cm
3
Non-linear :≤1.2.
Embodiment
Embodiment one
A kind of ZnO ceramic resistor material, its raw material are formed: ZnO accounts for 88.02% of total amount, TiO
2Account for gross weight 4.8%, MgO account for gross weight 2.42%, Sb
2O
3Account for 4.76% of gross weight.
The preparation method of present embodiment may further comprise the steps:
One, will account for the TiO of raw material gross weight 4.8%
2, 2.42% MgO, 4.76% Sb
2O
3Preparation technology by traditional ceramics carries out dry mixed, ball milling, wherein, the balls grinding media is the zirconium white ballstone, material, ball mass ratio are 1: 2, ball milling 3 hours, gained powder are contained in the aluminum oxide saggar with 200 ℃ temperature rise rate per hour and burn to 700 ℃, and are incubated 3 hours, naturally cool to room temperature then, obtain composite additive;
Two, the composite additive with gained in the step 1 adopts Stainless Steel Ball, nylon jar to add ethanol and carry out high-energy ball milling on planetary high-energy ball mill, drum's speed of rotation is 500 rev/mins, ball, powder mass ratio are 20: 1, behind the ball milling 8 hours, slurry is carried out deironing and drying by the traditional ceramics material preparation process;
Three, composite additive and the ZnO powder with gained in the step 2 mixes by weight, wherein the consumption of composite additive accounts for 11.98% of total amount, the consumption of ZnO accounts for 88.02% of total amount, with zirconia ball is ball-milling medium, and the polyvinyl alcohol water solution that adds raw material total mass 2% carries out ball milling and made slurry in 2 hours;
Four, slurry that step 3 is prepared carries out mist projection granulating by the technology of traditional ceramics and carries out dry-pressing formedly, and the biscuit volume density is 3.2g/cm
3
Five, institute's molding blank in the step 4 is burnt 1300 ℃ with 3 ℃/minute temperature rise rate, be incubated 3 hours, afterwards with 60 ℃/hour rate of temperature fall cool to room temperature;
Six, institute in the step 5 is polished on the sintered specimen surface, aluminium-plated electrode promptly makes required ceramic resistor.
The resistive performance of present embodiment gained is:
Resistivity: 1600 Ω cm;
Temperature coefficient of resistance :-2 * 10
-4/ ℃ (20-500 ℃);
Energy tolerance: 800J/cm
3
Non-linear: 1.1.
Embodiment two
A kind of ZnO ceramic resistor material, its raw material are formed: ZnO accounts for 86.51% of gross weight, TiO
2Account for gross weight 9.98%, MgO account for gross weight 2.52%, ZrO
2Account for 0.99% of gross weight.
The preparation method of present embodiment may further comprise the steps:
One, will account for the TiO of raw material gross weight 9.98%
2, 2.52% MgO, 0.99% ZrO
2Preparation technology by traditional ceramics carries out dry mixed, ball milling, wherein, the balls grinding media is the zirconium white ballstone, material, ball mass ratio are 1: 2, ball milling 2 hours, gained powder are contained in the aluminum oxide saggar with 200 ℃ temperature rise rate per hour and burn to 700 ℃, and are incubated 2 hours, naturally cool to room temperature then, obtain composite additive;
Two, the composite additive with gained in the step 1 adopts Stainless Steel Ball, nylon jar to add ethanol and carry out high-energy ball milling on planetary high-energy ball mill, drum's speed of rotation is 600 rev/mins, ball, powder mass ratio are 20: 1, behind the ball milling 8 hours, slurry is carried out deironing and drying by the traditional ceramics material preparation process;
Three, composite additive and the ZnO powder with gained in the step 2 mixes by weight, wherein the consumption of composite additive accounts for 13.49% of total amount, the consumption of ZnO accounts for 86.51% of total amount, with zirconia ball is ball-milling medium, and the polyvinyl alcohol water solution that adds raw material total mass 2% carries out ball milling and made slurry in 2 hours;
Four, slurry that step 3 is prepared carries out mist projection granulating by the technology of traditional ceramics and carries out dry-pressing formedly, and the biscuit volume density is 3.2g/cm
3
Five, institute's molding blank in the step 4 is burnt 1320 ℃ with 3 ℃/minute temperature rise rate, be incubated 2 hours, afterwards with 50 ℃/hour rate of temperature fall cool to room temperature;
Six, institute in the step 5 is polished on the sintered specimen surface, aluminium-plated electrode promptly makes required ceramic resistor.
The resistive performance of present embodiment gained is:
Resistivity: 700 Ω cm;
Temperature coefficient of resistance: 6 * 10
-5/ ℃ (20-500 ℃);
Energy tolerance: 750J/cm
3
Non-linear: 1.1.
Embodiment three
A kind of ZnO ceramic resistor material, its raw material are formed: ZnO accounts for 91.13% of total amount, TiO
2Account for gross weight 5.08%, MgO account for gross weight 3.59%, SiO
2Account for 0.2% of gross weight.
The preparation method of present embodiment may further comprise the steps:
One, will account for the TiO of raw material gross weight 5.08%
2, 3.59% MgO, 0.2% SiO
2Preparation technology by traditional ceramics carries out dry mixed, ball milling, wherein, the balls grinding media is the zirconium white ballstone, material, ball mass ratio are 1: 2, ball milling 3 hours, gained powder are contained in the aluminum oxide saggar with 200 ℃ temperature rise rate per hour and burn to 700 ℃, and are incubated 2 hours, naturally cool to room temperature then, obtain composite additive;
Two, the composite additive with gained in the step 1 adopts Stainless Steel Ball, nylon jar to add ethanol and carry out high-energy ball milling on planetary high-energy ball mill, drum's speed of rotation is 500 rev/mins, ball, powder mass ratio are 20: 1, behind the ball milling 9 hours, slurry is carried out deironing and drying by the traditional ceramics material preparation process;
Three, composite additive and the ZnO powder with gained in the step 2 mixes by weight, wherein the consumption of composite additive accounts for 8.87% of total amount, the consumption of ZnO accounts for 91.13% of total amount, with zirconia ball is ball-milling medium, and the polyvinyl alcohol water solution that adds raw material total mass 2% carries out ball milling and made slurry in 2 hours;
Four, slurry that step 3 is prepared carries out mist projection granulating by the technology of traditional ceramics and carries out dry-pressing formedly, and the biscuit volume density is 3.2g/cm
3
Five, institute's molding blank in the step 4 is burnt 1340 ℃ with 3 ℃/minute temperature rise rate, be incubated 3 hours, afterwards with 50 ℃/hour rate of temperature fall cool to room temperature;
Six, institute in the step 5 is polished on the sintered specimen surface, aluminium-plated electrode promptly makes required ceramic resistor.
The resistive performance of present embodiment gained is:
Resistivity: 100 Ω cm;
Temperature coefficient of resistance: 1.5 * 10
-4/ ℃ (20-500 ℃);
Energy tolerance: 700J/cm
3
Non-linear: 1.05.
Embodiment four
A kind of ZnO ceramic resistor material, its raw material are formed: ZnO accounts for 91.51% of total amount, TiO
2Account for gross weight 1.68%, MgO account for gross weight 3.12%, Al
2O
3Account for gross weight 3.02%, Y
2O
3Account for gross weight 0.34%, SnO
2Account for 0.33% of gross weight.
The preparation method of present embodiment may further comprise the steps:
One, will account for the TiO of raw material gross weight 1.68%
2, 3.12% MgO, 3.02% Al
2O
3, 0.34% Y
2O
3, 0.33% SnO
2Preparation technology by traditional ceramics carries out dry mixed, ball milling, wherein, the balls grinding media is the zirconium white ballstone, material, ball mass ratio are 1: 2, ball milling 2 hours, gained powder are contained in the aluminum oxide saggar with 200 ℃ temperature rise rate per hour and burn to 700 ℃, and are incubated 2 hours, naturally cool to room temperature then, obtain composite additive;
Two, the composite additive with gained in the step 1 adopts Stainless Steel Ball, nylon jar to add ethanol and carry out high-energy ball milling on planetary high-energy ball mill, drum's speed of rotation is 800 rev/mins, ball, powder mass ratio are 20: 1, behind the ball milling 6 hours, slurry is carried out deironing and drying by the traditional ceramics material preparation process.
Three, composite additive and the ZnO powder with gained in the step 2 mixes by weight, wherein the consumption of composite additive accounts for 8.49% of total amount, the consumption of ZnO accounts for 91.51% of total amount, with zirconia ball is ball-milling medium, and the polyvinyl alcohol water solution that adds raw material total mass 2% carries out ball milling and made slurry in 3 hours;
Four, slurry that step 3 is prepared carries out mist projection granulating by the technology of traditional ceramics and carries out dry-pressing formedly, and the biscuit volume density is 3.2g/cm
3
Five, institute's molding blank in the step 4 is burnt 1320 ℃ with 3 ℃/minute temperature rise rate, be incubated 3 hours, afterwards with 70 ℃/hour rate of temperature fall cool to room temperature;
Six, institute in the step 5 is polished on the sintered specimen surface, aluminium-plated electrode promptly makes required ceramic resistor.
The resistive performance of present embodiment gained is:
Resistivity: 630 Ω cm;
Temperature coefficient of resistance :-2 * 10
-4/ ℃ (20-500 ℃);
Energy tolerance: 800J/cm
3
Non-linear: 1.05.
Claims (10)
1. a ZnO ceramic resistor material is characterized in that, its raw material composition is by weight percentage: ZnO accounts for the 60-95% of total amount, TiO
2Account for the 0.2-20% of gross weight, 0.2-20%, all the other compositions that MgO accounts for gross weight are Sb
2O
3, Al
2O
3, Y
2O
3, CaO, SiO
2, SnO
2, ZrO
2In one or more ratios any, account for the 0.2-10% of gross weight.
2. a kind of ZnO ceramic resistor material according to claim 1 is characterized in that, its raw material composition is by weight percentage: ZnO accounts for 88.02% of total amount, TiO
2Account for gross weight 4.8%, MgO account for gross weight 2.42%, Sb
2O
3Account for 4.76% of gross weight.
3. a kind of ZnO ceramic resistor material according to claim 1 is characterized in that, its raw material composition is by weight percentage: ZnO accounts for 86.51% of total amount, TiO
2Account for gross weight 9.98%, MgO account for gross weight 2.52%, ZrO
2Account for 0.99% of gross weight.
4. a kind of ZnO ceramic resistor material according to claim 1 is characterized in that, its raw material composition is by weight percentage: ZnO accounts for 91.13% of total amount, TiO
2Account for gross weight 5.08%, MgO account for gross weight 3.59%, SiO
2Account for 0.2% of gross weight.
5. a kind of ZnO ceramic resistor material according to claim 1 is characterized in that, its raw material composition is by weight percentage: ZnO accounts for 91.51% of total amount, TiO
2Account for gross weight 1.68%, MgO account for gross weight 3.12%, Al
2O
3Account for gross weight 3.02%, Y
2O
3Account for gross weight 0.33%, SnO
2Account for 0.33% of gross weight.
6. the preparation method of a ZnO ceramic resistor is characterized in that, may further comprise the steps:
One, will account for the TiO of raw material gross weight 0.2-20%
2, the MgO of 0.2-20%, the Sb of 0.2-10%
2O
3, Al
2O
3, Y
2O
3, CaO, SiO
2, SnO
2, ZrO
2In one or more ratios any, preparation technology by traditional ceramics carries out dry mixed, ball milling, wherein, the balls grinding media is the zirconium white ballstone, and material, ball mass ratio are 1: 2, ball milling 2-3 hour, the gained powder is contained in the aluminum oxide saggar with 200 ℃ temperature rise rate per hour and burns to 700 ℃, and be incubated 2-3 hour, and naturally cool to room temperature then, obtain composite additive;
Two, the composite additive with gained in the step 1 adopts Stainless Steel Ball, nylon jar to add ethanol and carry out high-energy ball milling on planetary high-energy ball mill, drum's speed of rotation is 500-800 rev/min, ball, powder mass ratio are 20: 1, after ball milling 5-9 hour, slurry is carried out deironing and drying by the traditional ceramics material preparation process.
Three, composite additive and the ZnO powder with gained in the step 2 mixes by weight, wherein the consumption of composite additive accounts for total amount (5-40) %, the consumption of ZnO accounts for total amount (60-95) %, with zirconia ball is ball-milling medium, and the polyvinyl alcohol water solution that adds raw material total mass 2% carries out making in ball milling 1-3 hour slurry;
Four, slurry that step 3 is prepared carries out mist projection granulating by the technology of traditional ceramics and carries out dry-pressing formedly, and the biscuit volume density is 3.1-3.3g/cm
3
Five, institute's molding blank in the step 4 is burnt 1280-1340 ℃ with 3 ℃/minute temperature rise rate, be incubated 2-3 hour, afterwards with 50-100 ℃/hour rate of temperature fall cool to room temperature;
Six, institute in the step 5 is polished on the sintered specimen surface, aluminium-plated electrode promptly makes required ceramic resistor.
7. the preparation method of a kind of ZnO ceramic resistor according to claim 6 is characterized in that, may further comprise the steps:
One, will account for the TiO of raw material gross weight 4.8%
2, 2.42% MgO, 4.76% Sb
2O
3Preparation technology by traditional ceramics carries out dry mixed, ball milling, wherein, the balls grinding media is the zirconium white ballstone, material, ball mass ratio are 1: 2, ball milling 3 hours, gained powder are contained in the aluminum oxide saggar with 200 ℃ temperature rise rate per hour and burn to 700 ℃, and are incubated 3 hours, naturally cool to room temperature then, obtain composite additive;
Two, the composite additive with gained in the step 1 adopts Stainless Steel Ball, nylon jar to add ethanol and carry out high-energy ball milling on planetary high-energy ball mill, drum's speed of rotation is 500 rev/mins, ball, powder mass ratio are 20: 1, behind the ball milling 8 hours, slurry is carried out deironing and drying by the traditional ceramics material preparation process.
Three, composite additive and the ZnO powder with gained in the step 2 mixes by weight, wherein the consumption of composite additive accounts for 11.98% of total amount, the consumption of ZnO accounts for 88.02% of total amount, with zirconia ball is ball-milling medium, and the polyvinyl alcohol water solution that adds raw material total mass 2% carries out ball milling and made slurry in 2 hours;
Four, slurry that step 3 is prepared carries out mist projection granulating by the technology of traditional ceramics and carries out dry-pressing formedly, and the biscuit volume density is 3.2g/cm
3
Five, institute's molding blank in the step 4 is burnt 1300 ℃ with 3 ℃/minute temperature rise rate, be incubated 3 hours, afterwards with 60 ℃/hour rate of temperature fall cool to room temperature;
Six, institute in the step 5 is polished on the sintered specimen surface, aluminium-plated electrode promptly makes required ceramic resistor.
8. the preparation method of a kind of ZnO ceramic resistor according to claim 6 is characterized in that, may further comprise the steps:
One, will account for the TiO of raw material gross weight 9.98%
2, 2.52% MgO, 0.99% ZrO
2Preparation technology by traditional ceramics carries out dry mixed, ball milling, wherein, the balls grinding media is the zirconium white ballstone, material, ball mass ratio are 1: 2, ball milling 2 hours, gained powder are contained in the aluminum oxide saggar with 200 ℃ temperature rise rate per hour and burn to 700 ℃, and are incubated 2 hours, naturally cool to room temperature then, obtain composite additive;
Two, the composite additive with gained in the step 1 adopts Stainless Steel Ball, nylon jar to add ethanol and carry out high-energy ball milling on planetary high-energy ball mill, drum's speed of rotation is 600 rev/mins, ball, powder mass ratio are 20: 1, behind the ball milling 8 hours, slurry is carried out deironing and drying by the traditional ceramics material preparation process.
Three, composite additive and the ZnO powder with gained in the step 2 mixes by weight, wherein the consumption of composite additive accounts for 13.49% of total amount, the consumption of ZnO accounts for 86.51% of total amount, with zirconia ball is ball-milling medium, and the polyvinyl alcohol water solution that adds raw material total mass 2% carries out ball milling and made slurry in 2 hours;
Four, slurry that step 3 is prepared carries out mist projection granulating by the technology of traditional ceramics and carries out dry-pressing formedly, and the biscuit volume density is 3.2g/cm
3
Five, institute's molding blank in the step 4 is burnt 1320 ℃ with 3 ℃/minute temperature rise rate, be incubated 2 hours, afterwards with 50 ℃/hour rate of temperature fall cool to room temperature;
Six, institute in the step 5 is polished on the sintered specimen surface, aluminium-plated electrode promptly makes required ceramic resistor.
9. the preparation method of a kind of ZnO ceramic resistor according to claim 6 is characterized in that, may further comprise the steps:
One, will account for the TiO of raw material gross weight 5.08%
2, 3.59% MgO, 0.2% SiO
2Preparation technology by traditional ceramics carries out dry mixed, ball milling, wherein, the balls grinding media is the zirconium white ballstone, material, ball mass ratio are 1: 2, ball milling 3 hours, gained powder are contained in the aluminum oxide saggar with 200 ℃ temperature rise rate per hour and burn to 700 ℃, and are incubated 2 hours, naturally cool to room temperature then, obtain composite additive;
Two, the composite additive with gained in the step 1 adopts Stainless Steel Ball, nylon jar to add ethanol and carry out high-energy ball milling on planetary high-energy ball mill, drum's speed of rotation is 500 rev/mins, ball, powder mass ratio are 20: 1, behind the ball milling 9 hours, slurry is carried out deironing and drying by the traditional ceramics material preparation process;
Three, composite additive and the ZnO powder with gained in the step 2 mixes by weight, wherein the consumption of composite additive accounts for 8.87% of total amount, the consumption of ZnO accounts for 91.13% of total amount, with zirconia ball is ball-milling medium, and the polyvinyl alcohol water solution that adds raw material total mass 2% carries out ball milling and made slurry in 2 hours;
Four, slurry that step 3 is prepared carries out mist projection granulating by the technology of traditional ceramics and carries out dry-pressing formedly, and the biscuit volume density is 3.2g/cm
3
Five, institute's molding blank in the step 4 is burnt 1340 ℃ with 3 ℃/minute temperature rise rate, be incubated 3 hours, afterwards with 50 ℃/hour rate of temperature fall cool to room temperature;
Six, institute in the step 5 is polished on the sintered specimen surface, aluminium-plated electrode promptly makes required ceramic resistor.
10. the preparation method of a kind of ZnO ceramic resistor according to claim 6 is characterized in that, may further comprise the steps:
One, will account for the TiO of raw material gross weight 1.68%
2, 3.12% MgO, 3.02% Al
2O
3, 0.33% Y
2O
3, 0.33% SnO
2Preparation technology by traditional ceramics carries out dry mixed, ball milling, wherein, the balls grinding media is the zirconium white ballstone, material, ball mass ratio are 1: 2, ball milling 2 hours, gained powder are contained in the aluminum oxide saggar with 200 ℃ temperature rise rate per hour and burn to 700 ℃, and are incubated 2 hours, naturally cool to room temperature then, obtain composite additive;
Two, the composite additive with gained in the step 1 adopts Stainless Steel Ball, nylon jar to add ethanol and carry out high-energy ball milling on planetary high-energy ball mill, drum's speed of rotation is 800 rev/mins, ball, powder mass ratio are 20: 1, behind the ball milling 6 hours, slurry is carried out deironing and drying by the traditional ceramics material preparation process;
Three, composite additive and the ZnO powder with gained in the step 2 mixes by weight, wherein the consumption of composite additive accounts for 8.49% of total amount, the consumption of ZnO accounts for 91.51% of total amount, with zirconia ball is ball-milling medium, and the polyvinyl alcohol water solution that adds raw material total mass 2% carries out ball milling and made slurry in 3 hours;
Four, slurry that step 3 is prepared carries out mist projection granulating by the technology of traditional ceramics and carries out dry-pressing formedly, and the biscuit volume density is 3.2g/cm
3
Five, institute's molding blank in the step 4 is burnt 1320 ℃ with 3 ℃/minute temperature rise rate, be incubated 3 hours, afterwards with 70 ℃/hour rate of temperature fall cool to room temperature;
Six, institute in the step 5 is polished on the sintered specimen surface, aluminium-plated electrode promptly makes required ceramic resistor.
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|---|---|---|---|
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|---|---|---|---|
| CN200910219295A CN101704668A (en) | 2009-12-03 | 2009-12-03 | ZnO ceramic resistor and preparation method thereof |
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| CN102274551A (en) * | 2011-08-26 | 2011-12-14 | 重庆科技学院 | Method for preparing Al2O3/stainless steel composite blood vessel stent material |
| CN102274551B (en) * | 2011-08-26 | 2013-12-11 | 重庆科技学院 | Method for preparing Al2O3/stainless steel composite blood vessel stent material |
| CN102424577A (en) * | 2011-09-20 | 2012-04-25 | 桂林电子科技大学 | Low voltage varistor ceramic material and preparation method thereof |
| CN102424577B (en) * | 2011-09-20 | 2013-07-10 | 桂林电子科技大学 | Low voltage varistor ceramic material and preparation method thereof |
| CN104692790A (en) * | 2013-12-04 | 2015-06-10 | 青岛润鑫伟业科贸有限公司 | Novel resistor material |
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| CN105110786A (en) * | 2015-09-14 | 2015-12-02 | 国家电网公司 | Zinc oxide resistor disc and manufacturing method thereof |
| CN106966717A (en) * | 2017-04-25 | 2017-07-21 | 李永朋 | A kind of high-tension resistive and preparation method thereof |
| CN112811895A (en) * | 2020-07-31 | 2021-05-18 | 北京七一八友晟电子有限公司 | Tin oxide ceramic resistor and preparation method thereof |
| CN114409397A (en) * | 2022-01-25 | 2022-04-29 | 广东爱晟电子科技有限公司 | Low TCR ceramic chip resistor and material and preparation thereof |
| CN114409397B (en) * | 2022-01-25 | 2022-10-21 | 广东爱晟电子科技有限公司 | Low TCR ceramic chip resistor and material and preparation thereof |
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Application publication date: 20100512 |