CN110015890A - A kind of high density ceramic feedthrough production method - Google Patents
A kind of high density ceramic feedthrough production method Download PDFInfo
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- CN110015890A CN110015890A CN201910272769.1A CN201910272769A CN110015890A CN 110015890 A CN110015890 A CN 110015890A CN 201910272769 A CN201910272769 A CN 201910272769A CN 110015890 A CN110015890 A CN 110015890A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/14—Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/3605—Implantable neurostimulators for stimulating central or peripheral nerve system
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/372—Arrangements in connection with the implantation of stimulators
- A61N1/375—Constructional arrangements, e.g. casings
- A61N1/37514—Brain implants
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/111—Fine ceramics
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6562—Heating rate
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6565—Cooling rate
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
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Abstract
This application discloses a kind of high density ceramic feedthrough production method, solve the problems, such as that the prior art is at high cost, process is tedious, manufacture difficulty is big and yield rate is low.It is fixed the following steps are included: platinum filament is inserted into mold, ceramic slurry is poured into the mold.By the ceramic slurry, curing and demolding, formation have the ceramic body of platinum filament together with mold.It is sintered after the ceramic body is dried, forms the ceramic body that platinum filament and ceramics are combined closely.The ceramic body is cut, attrition process forms ceramic feedthrough.The method has the advantages that substantially reduce the technology difficulty of ceramic feedthrough and cost of manufacture, improves the air-tightness of feedthrough and highly reliable.
Description
Technical field
This application involves implantable medical devices field more particularly to a kind of high density ceramic feedthrough production methods.
Background technique
Ceramic feedthrough is the core component of implantable medical device, is device electric signal I/O channel, power supply
The airtight protection carrier in channel and device chip is the key that built-in type device depends on for existence and plays a role.Implantable medical
Device is high airtight, highly reliable and bio-compatible to the basic demand of ceramic feedthrough.As artificial retina and cranial nerve stimulate
The development of the built-in type devices such as device, current ceramic feedthrough manufacturing technology have been difficult to meet the development of high feedthrough number ceramics feedthrough
It is required that there is an urgent need to develop high pin count, high airtight, miniaturization and biocompatible ceramic feedthrough products.Current implanted
It is insulator, platinum conductor for lead that medical device ceramics feedthrough, which has been all made of using aluminium oxide ceramics, and is welded using gold solder
The structure of titanium seal mouth ring is connect, it has the characteristics that biocompatibility is high, implantable medical device field is widely used in, for implantation
The function of formula medical device is realized and steady operation played an important role.Its production method mainly has: cofiring platinum filament method and
Injection moulding, wherein cofiring platinum filament method is made a living ceramics drilling, is inserted into cofiring after platinum filament, the method is inserted into the cumbersome amount of labour
Greatly；Injection moulding is that platinum filament is inserted into mold, and using jacket note cofiring is injected into, the method Mold Making is expensive, needs
Special injection (mo(u)lding) machine is wanted, injection molding technique is cumbersome.
Summary of the invention
The application proposes a kind of high density ceramic feedthrough production method, solve the prior art is at high cost, process is tedious, system
Make the problem that difficulty is big and yield rate is low.
The embodiment of the present application provides a kind of high density ceramic feedthrough production method, comprising the following steps:
Platinum filament is inserted into mold and is fixed, ceramic slurry is poured into the mold；
By the ceramic slurry, curing and demolding, formation have the ceramic body of platinum filament together with mold；
It is sintered after the ceramic body is dried, forms the ceramic body that platinum filament and ceramics are combined closely；
The ceramic body is cut, attrition process forms ceramic feedthrough.
Preferably, the ceramic slurry manufacturing process the following steps are included:
It is 1~3 micron in average grain diameter, 1~5wt% is added in the high-purity alumina ceramic powder greater than 99.9% in purity
Ammonium polyacrylate dispersant and 45~55wt% deionized water solvent after carry out ball milling, the Ball-milling Time is greater than 5 hours；
Secondary ball milling is carried out after the epoxy monomer of 2~10wt% is added into the slurry after the ball milling, described two
The time of secondary ball milling is greater than 5 hours, obtains for infusing solidifying ceramic slurry.
Preferably, further comprising the steps of:
By the ceramic slurry 10-2Curing agent and catalyst is added under the vacuum condition of Pa after degasification 10~30 minutes.
Preferably, the diameter of the platinum filament is 0.10~0.30mm, and the micro-pore diameter of the mold is than the platinum filament diameter
Big 0.02~0.05mm.
Preferably, the platinum filament is inserted into the bottom surface after the micropore of the mold perpendicular to the mold.
Preferably, solidification process described in the solidification process is that the mold is placed in in 80 DEG C of baking oven heating 2~4 is small
When.
Preferably, the drying process of the ceramic body is first to be dried at room temperature for 40~48 hours, places into 80~120
DEG C baking oven in heat 2~4 hours.
Preferably, the sintering process of ceramic body is to be sintered 2 hours in 1600 DEG C of air furnace after the drying, described
Heating rate is 2~5 DEG C/min in sintering process, and cooling rate is 5~10 DEG C/min.
Preferably, the ceramic body is cut by the skive piece of 0.1~0.3mm thickness.
Preferably, the weight of the curing agent is 0.2~0.5wt% of the ceramic slurry, the weight of the catalyst
For 0.1~0.3wt% of the ceramic slurry.
The embodiment of the present application use at least one above-mentioned technical solution can reach it is following the utility model has the advantages that
The high density ceramic feedthrough production method has the technology difficulty for substantially reducing ceramic feedthrough and cost of manufacture, mentions
The high air-tightness of feedthrough and highly reliable advantage.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please are not constituted an undue limitation on the present application for explaining the application.In the accompanying drawings:
Fig. 1 is a kind of high density ceramic feedthrough production process schematic diagram provided by the embodiments of the present application；
It (a) is the injection slurry schematic diagram into mold；
It (b) is solidification ceramic body schematic diagram；
(c) ceramic feedthrough schematic diagram is processed into for cutting and grinding；
Fig. 2 is a kind of high density ceramic feedthrough production method flow chart provided by the embodiments of the present application；
Fig. 3 is a kind of high density ceramic feedthrough production method flow chart including vacuum degassing step.
Specific embodiment
To keep the purposes, technical schemes and advantages of the application clearer, below in conjunction with the application specific embodiment and
Technical scheme is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the application one
Section Example, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall in the protection scope of this application.
Below in conjunction with attached drawing, the technical scheme provided by various embodiments of the present application will be described in detail.
Fig. 1 is a kind of high density ceramic feedthrough production process schematic diagram provided by the embodiments of the present application.Wherein (a) is Xiang Mo
Slurry schematic diagram is injected in tool, is (b) solidification ceramic body schematic diagram, (c) is processed into ceramic feedthrough schematic diagram for cutting and grinding.
The production process of the high density ceramic feedthrough includes that platinum filament is inserted into mold as shown in Fig. 1 (a) to fix, will
Ceramic slurry is poured into the mold.By the ceramic slurry, curing and demolding, formation such as Fig. 1 (b) are shown together with mold again
The ceramic body with platinum filament.It is sintered after the ceramic body is dried, forms platinum filament and combine closely with ceramics
Ceramic body.The structure of the ceramic body is identical as ceramic body shown in Fig. 1 (b).Finally as needed to the ceramic body
It is cut, forms the ceramics feedthrough as shown in Fig. 1 (c) after attrition process.
Fig. 2 is a kind of high density ceramic feedthrough production method flow chart provided by the embodiments of the present application, the high density pottery
Porcelain feedthrough production method the following steps are included:
Step 101: platinum filament is inserted into fixed in mold, cast ceramics slurry.
In a step 101, the mold is equipped with the micropore for being inserted into platinum filament.Making high density ceramic of different shapes
When feedthrough, the aluminum metal die of micropore is had according to the product drawing design processing of the ceramic feedthrough, can be inserted in micropore
Enter metal platinum filament, and guarantees that the platinum filament can be perpendicular to the bottom surface of the mold.Preferably, the diameter of the platinum filament is 0.10
The micro-pore diameter of~0.30mm, the mold are 0.02~0.05mm bigger than the platinum filament diameter, for guaranteeing that the platinum filament can
It is easily plugged into the mold.Platinum filament is inserted into the micropore of the mold and is fixed, makes the platinum filament perpendicular to the mold
Bottom surface.Then the ceramic slurry that the ball milling is completed is poured into the mold.
As a kind of embodiment of the application, the manufacturing process of the ceramic slurry the following steps are included:
It is 1~3 micron in average grain diameter, 1~5wt% is added in the high-purity alumina ceramic powder greater than 99.9% in purity
Ammonium polyacrylate dispersant and 45~55wt% deionized water solvent after carry out ball milling, the Ball-milling Time is greater than 5 hours.To
Carry out secondary ball milling after the epoxy monomer of 2~10wt% is added in slurry after the ball milling, the secondary ball milling when
Between be greater than 5 hours, obtain for infusing solidifying ceramic slurry.Preferably, the weight of the epoxy monomer is the high-purity
2~10wt% of aluminium oxide ceramics powder, the rear ceramic slurry viscosity of the ball milling is in 500cps or so.
Step 102: by the ceramic slurry together with mold curing and demolding.
In a step 102, the ceramic slurry is solidified together together with the mold for being inserted into the platinum filament, the solidification
Process is to be placed in heat 2~4 hours in 80 DEG C of baking oven by the mold of the insertion platinum filament, injection ceramic slurry to be allowed to solidify,
Then it is demoulded again, obtains the ceramic body with platinum filament.
Step 103: being sintered after ceramic body is dried.
In step 103, the ceramic body is first placed in and is dried at room temperature for 40~48 hours, place into 80~120
DEG C baking oven in heat 2~4 hours and be dried.Ceramic body after the drying is placed in 1600 DEG C of air furnace again
Middle to be sintered 2 hours, the heating rate in the sintering process is 2~5 DEG C/min, and cooling rate is 5~10 DEG C/min.The pottery
Porcelain billet body forms the ceramic body that the platinum filament and ceramics are combined closely after drying, sintering.
Step 104: the ceramic body is cut.
At step 104, using the skive piece of 0.1~0.3mm thickness to the ceramic body edge formed after drying, sintering
The direction vertical with the platinum filament is cut, then to the further attrition process of ceramic body after the cutting, is formed required
Ceramic feedthrough.
It includes high density ceramic feedthrough production method flow chart to ceramic body vacuum degassing step, institute that Fig. 3, which is a kind of,
State high density ceramic feedthrough production method the following steps are included:
Step 201: to ceramic slurry vacuum degassing, curing agent and catalyst is added.
In step 201, in Xiang Suoshu mold before injection ceramic slurry, first by the ceramic slurry 10-2Pa's is true
Curing agent and catalyst is added under empty condition after degasification 10~30 minutes.Preferably, the weight of the curing agent is the ceramics
0.2~0.5wt% of slurry, the weight of the catalyst are 0.1~0.3wt% of the ceramic slurry.
Step 202: platinum filament is inserted into fixed in mold, cast ceramics slurry.
In step 202, the mold is equipped with the micropore for being inserted into platinum filament.Making high density ceramic of different shapes
When feedthrough, the aluminum metal die of micropore is had according to the product drawing design processing of the ceramic feedthrough, can be inserted in micropore
Enter metal platinum filament, and guarantees that the platinum filament can be perpendicular to the bottom surface of the mold.Preferably, the diameter of the platinum filament is 0.10
The micro-pore diameter of~0.30mm, the mold are 0.02~0.05mm bigger than the platinum filament diameter, for guaranteeing that the platinum filament can
Easily it is inserted into the mold.Platinum filament is inserted into the micropore of the mold and is fixed, makes the platinum filament perpendicular to the mold
Bottom surface.Then the ceramic slurry that the ball milling is completed is poured into the mold.
Step 203: by the ceramic slurry together with mold curing and demolding.
In step 203, the ceramic slurry is solidified together together with the mold for being inserted into the platinum filament, the solidification
Process is to be placed in heat 2~4 hours in 80 DEG C of baking oven by the mold of the insertion platinum filament, injection ceramic slurry to be allowed to solidify,
Then it is demoulded again, obtains the ceramic body with platinum filament.
Step 204: being sintered after ceramic body is dried.
In step 204, the ceramic body is first placed in and is dried at room temperature for 40~48 hours, place into 80~120
DEG C baking oven in heat 2~4 hours and be dried.Ceramic body after the drying is placed in 1600 DEG C of air furnace again
Middle to be sintered 2 hours, the heating rate in the sintering process is 2~5 DEG C/min, and cooling rate is 5~10 DEG C/min.The pottery
Porcelain billet body forms the ceramic body that the platinum filament and ceramics are combined closely after drying, sintering.
Step 205: the ceramic body is cut.
In step 205, using the skive piece of 0.1~0.3mm thickness to the ceramic body edge formed after drying, sintering
The direction vertical with the platinum filament is cut, then to the further attrition process of ceramic body after the cutting, is formed required
Ceramic feedthrough.
It should be understood by those skilled in the art that, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that process, method, commodity or equipment including a series of elements are not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, commodity or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, commodity or equipment including the element.
The above description is only an example of the present application, is not intended to limit this application.For those skilled in the art
For, various changes and changes are possible in this application.All any modifications made within the spirit and principles of the present application are equal
Replacement, improvement etc., should be included within the scope of the claims of this application.
Claims (10)
1. a kind of high density ceramic feedthrough production method, which comprises the following steps:
Platinum filament is inserted into mold and is fixed, ceramic slurry is poured into the mold；
By the ceramic slurry, curing and demolding, formation have the ceramic body of platinum filament together with mold；
It is sintered after the ceramic body is dried, forms the ceramic body that platinum filament and ceramics are combined closely；
The ceramic body is cut, attrition process forms ceramic feedthrough.
2. high density ceramic feedthrough production method as described in claim 1, which is characterized in that the production of the ceramic slurry
Journey the following steps are included:
It is 1~3 micron in average grain diameter, the poly- of 1~5wt% is added in purity in the high-purity alumina ceramic powder greater than 99.9%
Ball milling is carried out after ammonium acrylate dispersing agent and 45~55wt% deionized water solvent, the Ball-milling Time is greater than 5 hours；
Secondary ball milling, the secondary ball are carried out after the epoxy monomer of 2~10wt% is added into the slurry after the ball milling
The time of mill is greater than 5 hours, obtains for infusing solidifying ceramic slurry.
3. high density ceramic feedthrough production method as claimed in claim 1 or 2, which is characterized in that further comprising the steps of:
By the ceramic slurry 10-2Curing agent and catalyst is added under the vacuum condition of Pa after degasification 10~30 minutes.
4. high density ceramic feedthrough production method as claimed in claim 1 or 2, which is characterized in that the diameter of the platinum filament is
The micro-pore diameter of 0.10~0.30mm, the mold are 0.02~0.05mm bigger than the platinum filament diameter.
5. high density ceramic feedthrough production method as claimed in claim 1 or 2, which is characterized in that described in the platinum filament insertion
Perpendicular to the bottom surface of the mold after the micropore of mold.
6. high density ceramic feedthrough production method as claimed in claim 1 or 2, which is characterized in that described in the solidification process
Solidification process is to be placed in the mold in 80 DEG C of baking oven to heat 2~4 hours.
7. high density ceramic feedthrough production method as described in claim 1, which is characterized in that the ceramic body it is dried
Cheng Weixian is dried at room temperature for 40~48 hours, is placed into 80~120 DEG C of baking oven and is heated 2~4 hours.
8. high density ceramic feedthrough production method as described in claim 1, which is characterized in that ceramic body after the drying
Sintering process is to be sintered 2 hours in 1600 DEG C of air furnace, and heating rate is 2~5 DEG C/min in the sintering process, cooling
Rate is 5~10 DEG C/min.
9. high density ceramic feedthrough production method as described in claim 1, which is characterized in that pass through the gold of 0.1~0.3mm thickness
Hard rock grinding wheel cuts the ceramic body.
10. high density ceramic feedthrough production method as claimed in claim 3, which is characterized in that the weight of the curing agent is
0.2~0.5wt% of the ceramic slurry, the weight of the catalyst are 0.1~0.3wt% of the ceramic slurry.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114603743A (en) * | 2022-03-30 | 2022-06-10 | 许英勇 | Plastic granules and production process thereof |
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