CN102491757A - Novel piezoelectric ceramic powder adhesive and preparation method thereof - Google Patents
Novel piezoelectric ceramic powder adhesive and preparation method thereof Download PDFInfo
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- CN102491757A CN102491757A CN2011104094254A CN201110409425A CN102491757A CN 102491757 A CN102491757 A CN 102491757A CN 2011104094254 A CN2011104094254 A CN 2011104094254A CN 201110409425 A CN201110409425 A CN 201110409425A CN 102491757 A CN102491757 A CN 102491757A
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Abstract
The invention relates to a novel piezoelectric ceramic powder adhesive and a preparation method thereof. The novel piezoelectric ceramic powder adhesive is prepared from the following raw materials in percentage by weight: x% of PVA (polyvinyl alcohol), y% of glycerol, z wt% of ethanol and distilled water, wherein 6<x<8, 0.2<y<0.4, 0.2<z<0.4, and x, y and z are percentage by weight on the basis of the distilled water. The preparation method comprises the following steps: (1) weighing and preparing according to the composition general formula of the raw materials; and (2) firing in a water bath for 5-6 hours while stirring, wherein the temperature is set at 85-95 DEG C. The prepared adhesive is a clear and transparent liquid after being cooled, and the specific gravity is 1.010-1.012g/cm<3>. The additional glycerol and ethanol are added in the adhesive preparation process, so that the powder flowability is improved without increasing the overall proportion of the adhesive in the spray granulation process, thereby reducing the friction of the powder on the die during formation, and performing the function of enhancing the blank quality and subsequent yield in long-term mass formation operation.
Description
Technical field
The present invention relates to a kind of piezo ceramic element dry pressuring forming process, belong to electronic devices and components manufacturing technology field, exactly relate to a kind of novel piezo-electric ceramic powder sticker that is mainly used in dry-pressing formed required granulation for powders and preparation method thereof.
Background technology
The spray-drying process granulation is used widely in the dry-pressing formed technology of piezoelectric ceramics in recent years.Its granulation powder has the advantages that sticker is evenly distributed, flowability is excellent, particle size is consistent; Can be in automatic batch production; Give full play to powdery row material characteristic, be able to apply higher forming pressure in the blank preparation and do not produce a layer crack, good blank intensity; Be beneficial to the density of the porcelain body after sintering and raising are burnt till; Reduce the following process scrap rate, reduce high voltage polarization and puncture ratio, provide performance consistent element function; In extensive ultrasound transducer element is produced, bring vast market prospect.
But adopt the powder of mist projection granulating, water ratio is extremely low, and is serious to the frictionally damage of mould in its long-time automatic moulding operation, thus the moulded blank outer rim caused pull, off-clip; Cause the sintering of follow-up blank, the rising of machining two procedures scrap rate.Thereby, further improve the powder flowability and reduce the frictionally damage of powder mould, can not only prolong the work-ing life of mould, more can in automatic batch production, provide to continue and the stable rate that manufactures a finished product.Find that through test the sticker ratio that increases in the granulation can improve the powder flowability conscientiously and reduce the frictionally damage of powder to mould; Yet the sticker ratio is big more, and the porcelain body density is low more behind the sintering; Thereby reduce following process and polar yield rate.Therefore, grope a kind of novel binders, promptly do not increase its ratio in the granulation powder and expect to improve the powder flowability again; And the internal friction between powder when reducing moulding; Improve the moulded blank quality, thereby reduce sintering, machining two-step scrap rate, have active demand.The object of the invention just is being based on above-mentioned application demand to carry out.
The characteristic that the fine sticker should have has: have enough viscosity, to guarantee that moulding is smooth and to reduce the friction between powder and mould; Can all volatilize during high temperature and not stay impurity; Can slowly volatilize rather than concentrate on volatilization in certain very narrow TR; Volatilization temperature is too high, causes and loses lead in order to avoid cause the plumbous oxide volatilization.The Z 150PH that generally uses at present, promptly PVA is a kind of reasonable sticker.
The spray-drying process granulation is the dry-pressing formed automatically now powder preparation method who generally uses, and the sticker that adds usually is PVA (Z 150PH), and the mobile of mist projection granulating material that only adds PVA receives the influence of its content bigger; The granulation material that the PVA ratio is big; Less when good fluidity and moulding to the mould damage, but behind the high temperature binder removal, the blank internal stress causes the sintering cracking more easily; And it is residual to be easy to generate pore, reduces the porcelain body density; The PVA ratio is little, the mobile variation of powder, and the easy clamping of powder causes the damage of mould, thereby influences the quality of moulded blank during moulding for a long time.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned existence, and a kind of novel piezo-electric ceramic powder sticker and preparation method thereof is provided.
Piezoelectric ceramics powder sticker of the present invention is to be processed by the following weight proportion raw material: x%PVA+y% USP Kosher+z% ethanol+zero(ppm) water, 6＜x in the formula＜8; 0.2＜y＜0.4; 0.2＜z＜0.4; X, y, z are the weight percent with zero(ppm) water.
The optimum weight proportioning of each raw material in the piezoelectric ceramics powder sticker of the present invention is: x is 7, and y is 0.3, and z is 0.3, i.e. 7%PVA+0.3% USP Kosher+0.3wt% ethanol+zero(ppm) water.
Become the preparation method of piezoelectric ceramic powder material sticker of the present invention to be above-mentioned each feedstock production: to comprise that process step is following:
1. the composition general formula by each raw material carries out the weighing preparation;
2. water-bath stirs and fired 5-6 hour, and 85 ℃-95 ℃ of temperature are set.
The sticker cooling back for preparing is as clear as crystal liquid, and its proportion is 1.010～1.012 (g/cm
3).
The sticker adding is opportunity: powder carries out the wet type stirring ball-milling; The ratio of water and powder is 0.7: 1; Behind the dispersion agent that adds ceramic powder weight ratio 1% simultaneously, stirring ball-milling to 4.5 hour, add the sticker for preparing and dispersion agent and the skimmer of 1-3% in ratio with ceramic powder weight ratio 7.14%; Carry out stirring ball-milling again, take out slurry after half a hour and carry out the spray-drying process granulation.
When carrying out the spray-drying process granulation, the discharge port temperature is controlled at 120 ℃～128 ℃.
Beneficial effect of the present invention is: in binder making; Seek to add extra USP Kosher and ethanol; When purpose is mist projection granulating, do not increase under the situation of sticker population proportion, improve the powder flowability; Powder plays and improves blank quality and follow-up yield rate effect in the long-time batch operations for forming the friction of mould during with the minimizing moulding.
Embodiment
To combine specific embodiment that the present invention is done detailed introduction below:
Embodiment 1
With PVA, USP Kosher, ethanol, water, by weight: 7%, 0.3%, 0.3%, 1 weigh mix after, in 85 ℃ of-95 ℃ of stirring in water bath heating 5 hours, the sticker for preparing was a colourless transparent liquid; At ceramic powder and water (water and powder weight ratio 0.7: 1); The dispersion agent that adds ceramic powder weight ratio 1% simultaneously; After mixing 4.5 hours, in the ratio of ceramic powder weight ratio 7.14% add join dispersion agent and the skimmer of sticker and 1-3%, carry out stirring ball-milling again; Take out slurry after half a hour and carry out the spray-drying process granulation, spraying drying discharge port temperature is set to 120 ℃～128 ℃.It is Φ 46mm * Φ 18.5mm * 6.3mm～6.8mm blank that the powder of preparation adopts 40T mouldenpress moulding specification.
Embodiment 2
With PVA, water; By weight 7%, 1 weigh mix after; In 85 ℃ of-95 ℃ of stirring in water bath heating 5 hours, the sticker for preparing was a colourless transparent liquid, after ceramic powder and water (water and powder weight ratio 0.7: 1) mix 4.5 hours; Add institute in ratio and join sticker and certain amount of dispersant and skimmer with ceramic powder weight ratio 7.14%; Carry out stirring ball-milling again, take out slurry approximately after half a hour and carry out the spray-drying process granulation, spraying drying discharge port temperature is set to 120 ℃～128 ℃.It is Φ 46mm * Φ 18.5mm * 6.3mm～6.8mm blank that the powder of preparation adopts 40T mouldenpress moulding specification.
In the batch process, ceramic component situation such as following table
| Sticker | Continuously shaped 1000 situation | Overall yield rate |
| Embodiment 1 | Few blank has the outer rim scratch | 90.88％ |
| Embodiment 2 | About 95 the edge scratch occurs | 85％ |
Embodiment 1 is the used sticker of the present invention, and embodiment 2 is the used sticker of traditional technology, under the same situation of other technologies; Because the blank quality of 1 moulding of embodiment is better; The damage of blank and mould is all less in the production, produces specification element of the same race, have an appointment 6% lifting of yield rate.Two kinds of not obviously differences of the last piezoelectric ceramics performance of measuring of embodiment.
Claims (6)
1. novel piezo-electric ceramic powder sticker, it is characterized in that: it is the sticker of being processed by the following weight proportion raw material: x%PVA+y% USP Kosher+z% ethanol+zero(ppm) water, 6＜x in the formula＜8; 0.2＜y＜0.4; 0.2＜z＜0.4; X, y, z are the weight percent with zero(ppm) water.
2. novel piezo-electric ceramic powder sticker according to claim 1, it is characterized in that: wherein the weight proportion of each raw material is: x is 7, and y is 0.3, and z is 0.3, i.e. 7%PVA+0.3% USP Kosher+0.3% ethanol+zero(ppm) water.
3. method for preparing novel piezo-electric ceramic powder sticker as claimed in claim 1 is characterized in that: comprise that step is following:
1. carry out the weighing preparation by the described composition general formula of claim 1;
2. water-bath stirs and fired 5-6 hour, and 85 ℃-95 ℃ of temperature are set.
4. the preparation method of novel piezo-electric ceramic powder sticker according to claim 3 is characterized in that: the sticker cooling back for preparing is as clear as crystal liquid, and its proportion is 1.010～1.012g/cm
3
5. according to the preparation method of claim 3 or 4 described novel piezo-electric ceramic powder stickers; It is characterized in that: the sticker adding is opportunity: powder carries out the wet type stirring ball-milling, and the ratio of water and powder is 0.7: 1, adds dispersion agent simultaneously; Behind the stirring ball-milling to 4.5 hour; Ratio in ceramic powder weight ratio 7.14% adds sticker and 1-3% dispersion agent and the skimmer for preparing, and carries out stirring ball-milling again, takes out slurry after half a hour and carries out the spray-drying process granulation.
6. the preparation method of novel piezo-electric ceramic powder sticker according to claim 5 is characterized in that: when carrying out the spray-drying process granulation, the discharge port temperature is controlled at 120 ℃～128 ℃.
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| CN2011104094254A CN102491757A (en) | 2011-12-09 | 2011-12-09 | Novel piezoelectric ceramic powder adhesive and preparation method thereof |
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| CN2011104094254A CN102491757A (en) | 2011-12-09 | 2011-12-09 | Novel piezoelectric ceramic powder adhesive and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109761586A (en) * | 2019-03-06 | 2019-05-17 | 娄底市安地亚斯电子陶瓷有限公司 | A kind of preparation method of power battery connector ceramic material |
| CN109761624A (en) * | 2019-03-06 | 2019-05-17 | 娄底市安地亚斯电子陶瓷有限公司 | A kind of ceramic prilling method and its application |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1232805A (en) * | 1999-05-28 | 1999-10-27 | 清华大学 | Preparation of silicon nitride-based composite material with superhigh tenacity |
| CN101337813A (en) * | 2008-08-15 | 2009-01-07 | 合肥学院 | Multicomponent few-lead piezoelectric ceramics of high tension performance and method for preparing same |
| CN102219508A (en) * | 2011-03-16 | 2011-10-19 | 陕西师范大学 | Lanthanum substituted titanate copper bismuth sodium giant dielectric ceramic material and preparation method thereof |
-
2011
- 2011-12-09 CN CN2011104094254A patent/CN102491757A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1232805A (en) * | 1999-05-28 | 1999-10-27 | 清华大学 | Preparation of silicon nitride-based composite material with superhigh tenacity |
| CN101337813A (en) * | 2008-08-15 | 2009-01-07 | 合肥学院 | Multicomponent few-lead piezoelectric ceramics of high tension performance and method for preparing same |
| CN102219508A (en) * | 2011-03-16 | 2011-10-19 | 陕西师范大学 | Lanthanum substituted titanate copper bismuth sodium giant dielectric ceramic material and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109761586A (en) * | 2019-03-06 | 2019-05-17 | 娄底市安地亚斯电子陶瓷有限公司 | A kind of preparation method of power battery connector ceramic material |
| CN109761624A (en) * | 2019-03-06 | 2019-05-17 | 娄底市安地亚斯电子陶瓷有限公司 | A kind of ceramic prilling method and its application |
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Application publication date: 20120613 |