CN102875137A - Tape casting slurry for laminated sheet type electronic component and preparation method for tape casting slurry - Google Patents
Tape casting slurry for laminated sheet type electronic component and preparation method for tape casting slurry Download PDFInfo
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- CN102875137A CN102875137A CN2012101146020A CN201210114602A CN102875137A CN 102875137 A CN102875137 A CN 102875137A CN 2012101146020 A CN2012101146020 A CN 2012101146020A CN 201210114602 A CN201210114602 A CN 201210114602A CN 102875137 A CN102875137 A CN 102875137A
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Abstract
The invention discloses tape casting slurry for a laminated sheet type electronic component and a preparation method for the tape casting slurry. The tape casting slurry comprises 45 to 55 weight percent of ceramic or ferrite powder, 0.1 to 1.0 weight percent of dispersing agent, 30 to 48 weight percent of solvent, 3 to 8 weight percent of adhesive, 3 to 5 weight percent of plasticizer, 0.1 to 0.5 weight percent of 2-methyl-2,4-pentendiol serving as an addition agent a and 0.1 to 0.5 weight percent of silane coupling agent serving as an addition agent b. The 2-methyl-2,4-pentendiol is added, so that the problems that the viscosity of the slurry is rapidly increased, and the performance of a membrane is rapidly deteriorated because boric is added are solved; the silane coupling agent is added, so that the slurry is low in viscosity and high in dispersing performance, the green density of the membrane is increased, and the ductility is enhanced; and the finally prepared slurry is uniform, stable and suitable for large-scale production.
Description
Technical field
The present invention relates to electronic devices and components manufacturing technology field, relate in particular to a kind of laminated sheet type electronic component casting slurry and preparation method thereof.
Background technology
Flow casting molding refers to add the compositions such as solvent, dispersion agent, binding agent, softening agent in ceramic powder, obtains finely dispersed stable slurry, makes a kind of forming method of desired thickness film at casting machine.It has the following advantages: 1. can prepare single-phase or the complex phase ceramic sheeting; 2. defect size is little; 3. the product composition fluctuating is little, stable performance; 4. production efficiency is high, but operate continuously; 5. all can large and smallly produce in batches, be suitable for industrial production; 6. be suitable for the large-scale thin plate pottery of moulding or metal parts, this base part may or be difficult to hardly by compacting or extrusion forming, and the base substrate of making various size and shape by flow casting molding is then very easy, and can guarantee green body quality.So the quality that the curtain coating operation is carried out has a great impact rear operation, and the configuration of casting slurry is the key of curtain coating.
In recent years, low temperature co-fired material system emerges in an endless stream, and the development of the aspects such as this miniaturization to various lamination electronic devices and components, cost degradation, high reliability has brought opportunity, but also has new problem to occur simultaneously:
1, some low temperature co-fired material system has unavoidably been introduced the sintering aid (boric acid or boron trioxide, borate family and boron-containing glass) of boracic, gelling reaction occurs in binding agent polyvinyl butyral acetal (PVB) commonly used in its meeting and the casting molding processes, forms the PVB-B (OH) with three dimensional gel structure
4 -Compound makes casting slurry thickening and gelation, and the low temperature co-fired material that contains boron can not obtain the diaphragm of good mechanical performance through casting technique.
2, in the process of configuration casting slurry, because binding agent does not obtain first the swelling dissolving, directly adding is to can not get good dispersion at short notice, between binding agent and binding agent, binding agent and the powder in conjunction with bad, reunite in the time of can causing curtain coating, the bad phenomenon such as bubble, pinprick, coarse, local macrobead occur.
Summary of the invention
For the weak point that exists in the above-mentioned technology, the invention provides a kind of laminated sheet type electronic component casting slurry and preparation method thereof, the adding that can solve boron causes the problem that slurry viscosity sharply increases, the diaphragm performance sharply worsens, simultaneously, the Viscosity of Slurry for Tape casting that produces is low, dispersed good, the diaphragm green density increases, and ductility strengthens.
For achieving the above object, the invention provides a kind of laminated sheet type electronic component casting slurry, formed by pottery or ferrite powder, dispersion agent, solvent, binding agent, softening agent, additive a and additive b; The weight percent of described each component is: pottery or ferrite powder are 45～55wt%, and dispersion agent is 0.1～1.0wt%, and solvent is 30～48wt%, binding agent is 3～8wt%, softening agent is 3～5wt%, and additive a is 0.1～0.5wt%, and additive b is 0.1～0.5wt%; Wherein, described additive a is hexylene glycol; Described additive b is silane coupling agent.
Wherein, described dispersion agent is at least a in the nonionic surface active agent such as Viscotrol C, fish oil, tributyl phosphate, Triton X-100.
Wherein, described solvent is the mixed solvent of two kinds of solvents, wherein main solvent is ethanol, vinyl acetic monomer or propyl acetate, solubility promoter is butanone, propyl alcohol, butanols or isopropylcarbinol, when main solvent was ethanol, solubility promoter was selected butanone, when main solvent is vinyl acetic monomer and propyl acetate, solubility promoter is selected propyl alcohol, butanols or isopropylcarbinol, and main solvent and solubility promoter mass ratio are (1～5): 1.
Wherein, described binding agent is polyvinyl butyral acetal.
Wherein, described softening agent be in triglycol two 2-ethylhexoates, dioctyl phthalate (DOP), dibutyl phthalate and the glycerol one or more.
For achieving the above object, the present invention also provides a kind of laminated sheet type electronic component casting slurry making method, may further comprise the steps:
(1), pottery or ferrite powder, dispersion agent, solvent, additive a and additive b weighed up by weight percentage after, add together ball mill and mixed 24 ± 4 hours, obtain uniform slurry A; Wherein, described additive a is hexylene glycol; Described additive b is silane coupling agent;
(2), solvent, binding agent and softening agent weighed up by weight percentage after, solvent and softening agent mixing, then at room temperature add while stirring binding agent first, stirred 5 ± 1 hours, obtain uniform binder solution B;
(3), uniform binder solution B is added among the A in 1: 2 ratio, continue ball milling after 20 ± 4 hours, namely obtain required casting slurry.
Wherein, in step (1), the pottery among the described slurry A or the particle diameter D50 of ferrite powder are 1.5 ± 0.5 μ m.
Wherein, in step (1), the weight percent of described each component is: the pottery of 70～80 weight parts or ferrite powder, 0.2 the dispersion agent of～0.5 weight part, 19.0 the solvent of～29.0 weight parts, the additive a of 0.2～0.5 weight part, the additive b of 0.1～0.5 weight part.
Wherein, in step (2), the weight percent of described each component is: the solvent of 70～77 weight parts, the binding agent of 18～21 weight parts, the softening agent of 5～12 weight parts.
The invention has the beneficial effects as follows: compared with prior art, laminated sheet type electronic component casting slurry provided by the invention and preparation method thereof has the following advantages:
1) the present invention makes itself and boracic sintering aid generation coordination reaction by adding additive a, thereby the adding that has solved boron causes that slurry viscosity sharply increases, the rapid problem of deterioration of diaphragm performance;
2) the present invention is conducive to the combination between powder and binding agent, binding agent and the binding agent by adding additive b, and slurry viscosity is low, and dispersed good, the diaphragm green density increases, and ductility strengthens, and is more obvious to the thinner effect of thickness;
3) the present invention adopts improved dispersion ball milling method, is conducive to reduce Ball-milling Time, and slurry is more uniform and stable, is fit to very much large-scale mass production.
Description of drawings
Fig. 1 is the flow chart of steps of casting slurry making method of the present invention.
Embodiment
In order more clearly to explain the present invention, below in conjunction with accompanying drawing the present invention is done to describe further.
See also Fig. 1, laminated sheet type electronic component casting slurry making method provided by the invention may further comprise the steps:
(1), pottery or ferrite powder, dispersion agent, solvent, additive a and additive b weighed up by weight percentage after, add together ball mill and mixed 24 ± 4 hours, obtain uniform slurry A; Wherein, described additive a is hexylene glycol; Described additive b is silane coupling agent; In this step, the weight percent of each component is: the pottery of 70～80 weight parts or ferrite powder, the dispersion agent of 0.2～0.5 weight part, the solvent of 19.0～29.0 weight parts, 0.2 the additive a of～0.5 weight part, the additive b of 0.1～0.5 weight part;
(2), solvent, binding agent and softening agent weighed up by weight percentage after, solvent and softening agent mixing, then at room temperature add while stirring binding agent first, stirred 5 ± 1 hours, obtain uniform binder solution B; In this step, the weight percent of described each component is: the solvent of 70～77 weight parts, the binding agent of 18～21 weight parts, the softening agent of 5～12 weight parts;
(3), uniform binder solution B is added among the A in 1: 2 ratio, continue ball milling after 20 ± 4 hours, namely obtain required casting slurry.
In specific embodiment; above-mentioned step (1) and (2) are in no particular order; so long as the binder solution B that obtains in the step (2) is added among step (1) the slurry A in 1: 2 ratio; continue ball milling; obtain the embodiment in the required casting slurry; all belong to simple deformation of the present invention or conversion, fall into protection scope of the present invention.
Laminated sheet type electronic component casting slurry through aforesaid method obtains is comprised of pottery or ferrite powder, dispersion agent, solvent, binding agent, softening agent, additive a and additive b; The weight percent of each component is: pottery or ferrite powder are 45～55wt%, and dispersion agent is 0.1～1.0wt%, and solvent is 30～48wt%, binding agent is 3～8wt%, softening agent is 3～5wt%, and additive a is 0.1～0.5wt%, and additive b is 0.1～0.5wt%; Wherein, additive a is hexylene glycol; Additive b is silane coupling agent.
Be understandable that; additive a of the present invention is not limited to hexylene glycol; to hexylene glycol similar chemical feature is arranged; can with boracic sintering aid generation coordination reaction; other chemical materials of the problem that thereby the adding that has solved boron causes, and slurry viscosity sharply increases, the diaphragm performance sharply worsens; also belong to simple deformation of the present invention or conversion, fall into protection scope of the present invention.
Be understandable that; additive b of the present invention is not limited to silane coupling agent; to silane coupling agent similar chemical feature is arranged; can be conducive to the combination between powder and binding agent, binding agent and the binding agent, slurry viscosity is low, and is dispersed good; the diaphragm green density increases; other chemical materials that ductility strengthens also belong to simple deformation of the present invention or conversion, fall into protection scope of the present invention.
Below in conjunction with embodiment and cooperate that the accompanying drawing table is detailed to give explanation.
Embodiment one:
A, by weight percentage ceramic powder 75%, Viscotrol C 0.2%, ethanol 14.64%, butanone 9.76%,, after hexylene glycol 0.2% and silane coupling agent 0.2% weigh up by weight percentage, add together ball mill and mixed 24 ± 4 hours, obtain uniform slurry;
B, ethanol 42.0%, butanone 28.0%, polyvinyl butyral acetal 20%, triglycol two 2-ethylhexoates 5% and glycerol 5% weighed up by weight percentage after, first solvent and softening agent are mixed, then at room temperature add while stirring binding agent, stirred 5 ± 1 hours, and obtained uniform binder solution;
C, uniform binder solution B is added among the A in 1: 2 ratio, continue ball milling after 20 ± 4 hours, namely get the casting slurry that patent requires;
D, the slurry that makes is carried out flow casting molding, lower dry 5 ± 1 minutes at 50～60 ℃.
Embodiment two:
A, after ceramic powder 70%, fish oil 0.3%, propyl acetate 24.23%, isopropylcarbinol 4.97%, hexylene glycol 0.4% and silane coupling agent 0.1% weigh up by weight percentage by weight percentage, add together ball mill and mixed 24 ± 4 hours, obtain uniform slurry;
B, propyl acetate 58.10%, isopropylcarbinol 11.90%, polyvinyl butyral acetal 18%, dioctyl phthalate (DOP) 8% and glycerol 4% weighed up by weight percentage after, first solvent and softening agent are mixed, then at room temperature add while stirring binding agent, stirred 5 ± 1 hours, and obtained uniform binder solution;
C, uniform binder solution B is added among the A in 1: 2 ratio, continue ball milling after 20 ± 4 hours, namely get the casting slurry that patent requires;
D, the slurry that makes is carried out flow casting molding, lower dry 5 ± 1 minutes at 55～80 ℃.
Embodiment three:
A, by weight percentage ferrite powder 80%, Triton X-100 0.4%, ethanol 11.88%, butanone 6.92%,, after hexylene glycol 0.5% and silane coupling agent 0.3% weigh up by weight percentage, add together ball mill and mixed 24 ± 4 hours, obtain uniform slurry;
B, ethanol 45.0%, butanone 30.0%, polyvinyl butyral acetal 19% and dibutyl phthalate 6% weighed up by weight percentage after, first solvent and softening agent are mixed, then at room temperature add while stirring binding agent, stirred 5 ± 1 hours, obtain uniform binder solution;
C, uniform binder solution B is added among the A in 1: 2 ratio, continue ball milling after 20 ± 4 hours, namely get the casting slurry that patent requires;
D, the slurry that makes is carried out flow casting molding, lower dry 5 ± 1 minutes at 50～60 ℃.
Embodiment four:
A, by weight percentage ferrite powder 70%, tributyl phosphate 0.5%, n-propyl acetate 23.82%, isopropylcarbinol 4.88%,, after hexylene glycol 0.3% and silane coupling agent 0.5% weigh up by weight percentage, add together ball mill and mixed 24 ± 4 hours, obtain uniform slurry;
B, n-propyl acetate 59.76%, isopropylcarbinol 12.24%, polyvinyl butyral acetal 18% and dioctyl phthalate (DOP) 10% weighed up by weight percentage after, first solvent and softening agent are mixed, then at room temperature add while stirring binding agent, rapid stirring 24 ± 4 hours obtains uniform binder solution;
C, uniform binder solution B is added among the A in 1: 2 ratio, continue ball milling after 20 ± 4 hours, namely get the casting slurry that patent requires;
D, the slurry that makes is carried out flow casting molding, lower dry 5 ± 1 minutes at 55～80 ℃.
More than disclosed only be several specific embodiment of the present invention, but the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (9)
1. a laminated sheet type electronic component casting slurry is characterized in that, is comprised of pottery or ferrite powder, dispersion agent, solvent, binding agent, softening agent, additive a and additive b; The weight percent of described each component is: pottery or ferrite powder are 45～55wt%, and dispersion agent is 0.1～1.0wt%, and solvent is 30～48wt%, binding agent is 3～8wt%, softening agent is 3～5wt%, and additive a is 0.1～0.5wt%, and additive b is 0.1～0.5wt%; Wherein, described additive a is hexylene glycol; Described additive b is silane coupling agent.
2. casting slurry according to claim 1 is characterized in that, described dispersion agent is at least a in the nonionic surface active agent such as Viscotrol C, fish oil, tributyl phosphate, Triton X-100.
3. casting slurry according to claim 1 and 2, it is characterized in that, described solvent is the mixed solvent of two kinds of solvents, wherein main solvent is ethanol, vinyl acetic monomer or propyl acetate, and solubility promoter is butanone, propyl alcohol, butanols or isopropylcarbinol, when main solvent is ethanol, solubility promoter is selected butanone, when main solvent was vinyl acetic monomer and propyl acetate, solubility promoter was selected propyl alcohol, butanols or isopropylcarbinol, and main solvent and solubility promoter mass ratio are (1～5): 1.
4. casting slurry according to claim 3 is characterized in that, described binding agent is polyvinyl butyral acetal.
5. casting slurry according to claim 4 is characterized in that, described softening agent be in triglycol two 2-ethylhexoates, dioctyl phthalate (DOP), dibutyl phthalate and the glycerol one or more.
6. laminated sheet type electronic component casting slurry making method may further comprise the steps:
(1), pottery or ferrite powder, dispersion agent, solvent, additive a and additive b weighed up by weight percentage after, add together ball mill and mixed 24 ± 4 hours, obtain uniform slurry A; Wherein, described additive a is hexylene glycol; Described additive b is silane coupling agent;
(2), solvent, binding agent and softening agent weighed up by weight percentage after, solvent and softening agent mixing, then at room temperature add while stirring binding agent first, stirred 5 ± 1 hours, obtain uniform binder solution B;
(3), uniform binder solution B is added among the A in 1: 2 ratio, continue ball milling after 20 ± 4 hours, namely obtain required casting slurry.
7. casting slurry making method according to claim 6 is characterized in that, in step (1), the pottery among the described slurry A or the particle diameter D50 of ferrite powder are 1.5 ± 0.5 μ m.
8. casting slurry making method according to claim 6, it is characterized in that, in step (1), the weight percent of described each component is: the pottery of 70～80 weight parts or ferrite powder, 0.2 the dispersion agent of～0.5 weight part, 19.0 the solvent of～29.0 weight parts, the additive a of 0.2～0.5 weight part, the additive b of 0.1～0.5 weight part.
9. casting slurry making method according to claim 6 is characterized in that, in step (2), the weight percent of described each component is: the solvent of 70～77 weight parts, the binding agent of 18～21 weight parts, the softening agent of 5～12 weight parts.
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| CN104465020A (en) * | 2014-12-25 | 2015-03-25 | 深圳市固电电子有限公司 | Cascading inductor based on metal magnetic slurry and preparation method thereof |
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| CN107235714A (en) * | 2017-08-01 | 2017-10-10 | 郑州联冠科技有限公司 | Electronic ceramics casting slurry configuration technique |
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Application publication date: 20130116 |