CN112142484A - Preparation method of ceramic for ceramic sensor - Google Patents

Preparation method of ceramic for ceramic sensor Download PDF

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Publication number
CN112142484A
CN112142484A CN202010991857.XA CN202010991857A CN112142484A CN 112142484 A CN112142484 A CN 112142484A CN 202010991857 A CN202010991857 A CN 202010991857A CN 112142484 A CN112142484 A CN 112142484A
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ceramic
raw materials
sintering
heating
temperature
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陈根发
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Zhuzhou Sanda Electronic Manufacturing Co ltd
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Zhuzhou Sanda Electronic Manufacturing Co ltd
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Abstract

The invention discloses a preparation method of ceramic for a ceramic sensor, which comprises the following steps: mixing and grinding the raw materials into powder, calcining, and screening after the calcination is finished; mixing and stirring the sieved mixture, and injecting the mixture into a first mold for molding; bonding the metal net on the inner wall of the outer mold, simultaneously placing the outer mold into a second mold, injecting raw materials, and solidifying to obtain a blank; and (4) sequentially placing the blank into a heating furnace and a sintering furnace for sintering to obtain a ceramic finished product. According to the preparation method of the ceramic for the ceramic sensor, firstly, the prepared ceramic has good stability and thermal shock resistance through mutual promotion and interaction among various raw materials; secondly, the metal net is arranged in the ceramic, so that when the ceramic is broken or damaged, the damaged end can be temporarily connected, and the safety of the ceramic sensor in use is improved; and thirdly, the uniformity of the ceramic when being heated can be improved by filling graphite during primary sintering.

Description

Preparation method of ceramic for ceramic sensor
Technical Field
The invention relates to the field of ceramic sensing, in particular to a preparation method of ceramic for a ceramic sensor.
Background
The ceramic sensor is made of a ceramic material, but with the development of science and technology, the requirements of people on the ceramic sensor are higher and higher, so that the traditional ceramic sensor cannot meet the use requirements of people;
at present, when an existing ceramic sensor is used, due to the effect of the characteristics of a ceramic material, when collision occurs, the ceramic is broken into fragments with different sizes, and the ceramic sensor is often installed inside a compact device, so that the fragments generated by the breakage are easy to enter other electronic devices to influence the normal operation of the electronic devices.
Disclosure of Invention
The invention mainly aims to provide a preparation method of ceramic for a ceramic sensor, which can effectively solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method for preparing a ceramic for a ceramic sensor, the method comprising the steps of:
mixing raw materials: mixing and grinding the raw materials into powder, calcining the raw materials, screening after the calcination is finished, and screening the raw materials by using a 400-mesh screen when the raw materials are screened;
manufacturing an external mold: adding clear water into the screened raw materials, mixing and stirring, and injecting into a first mold to form to obtain an outer mold;
manufacturing a blank body: bonding the metal net on the inner wall of the outer mold, simultaneously placing the outer mold into a second mold, injecting raw materials, and solidifying to obtain a blank;
primary sintering: soaking the blank in a wax solution for 3-5min, cooling to normal temperature, placing the blank in a heating furnace, and filling graphite particles;
sintering of a finished product: and taking out the blank body from the heating, and putting the blank body into a sintering furnace for sintering to obtain a ceramic finished product.
Preferably, the raw materials adopted in the mixing of the raw materials comprise the following components in parts by weight: al (Al)2O320 to 28 portions of ZrO245 to 48 portions of TiO250-55 parts of SrO, 5-12 parts of talcum powder, 5-10 parts of cordierite, 16-18 parts of lithium carbonate and 14-15 parts of pyrochlore.
Preferably, the raw material calcination comprises the following steps:
(1) and low-temperature drying: firstly, drying the raw materials at the temperature of 50-58 ℃;
(2) and medium-temperature heating: after drying, heating to 500-650 ℃, and extruding the raw materials;
(3) and high-temperature calcination: after heating at the medium temperature, heating to 1100-1200 ℃, and calcining for 10-15 min.
Preferably, the raw material is sieved by using a 400-mesh sieve.
Preferably, when the outer die is manufactured, the ratio of the raw materials to the clean water is 20:4-5, and Fe is added2O3After the first mold is injected, the mold is rotated at a rotation speed of 400-.
Preferably, the diameter of the metal mesh is 0.5-1mm and the mesh number is 50-200 mesh when the blank is made.
Preferably, the diameter of the graphite particles during primary sintering is 2-5mm, the temperature during primary sintering is 1000-1100 ℃, and the heating time is 5-8 h.
Preferably, the sintering in the sintering furnace comprises the following steps:
i, primary heating: firstly heating at the temperature of 1200-1300 ℃ for 5-6 min;
II, high-temperature sintering: rotating the blank at a rotation speed of 35-40r/min, and simultaneously heating to 1400-1600 ℃ for sintering.
Compared with the prior art, the invention has the following beneficial effects:
firstly, through mutual promotion and interaction among various raw materials, the prepared ceramic has good stability and thermal shock resistance;
secondly, the metal mesh is arranged in the ceramic, so that when the ceramic is broken or damaged, the damaged end can be temporarily connected, the influence on the normal use of other devices is avoided, and the safety of the ceramic sensor in use is improved;
thirdly, the uniformity of the ceramic when being heated can be improved by filling graphite during primary sintering;
fourthly, the quality of the sintered ceramic can be improved by controlling the temperature of each stage during sintering of the finished product;
fifthly, the blank body is controlled to rotate when the finished product is sintered, so that the heating uniformity of the blank body can be improved.
Drawings
FIG. 1 is a flow chart of an overall structure of a method for preparing a ceramic for a ceramic sensor according to the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Comparative example 1
As shown in fig. 1, a method for preparing a ceramic for a ceramic sensor, the method comprising the steps of:
mixing raw materials: mixing and grinding the raw materials into powder, calcining the raw materials, and screening after the calcination is finished, wherein the raw materials adopted in the raw material mixing process are prepared from the following components in parts by weight: al (Al)2O325 parts of ZrO246 parts of TiO250 parts of SrO 8, 7 parts of talcum powder, 7 parts of cordierite, 16 parts of lithium carbonate and 14 parts of pyrochlore, and the raw materials comprise the following steps during calcination:
(1) and low-temperature drying: firstly, drying the raw materials at the temperature of 50 ℃;
(2) and medium-temperature heating: after drying, heating to 600 ℃, and extruding the raw materials;
(3) and high-temperature calcination: heating at medium temperature, heating to 1100 deg.C, and calcining for 15 min;
manufacturing an external mold: adding clear water into the sieved raw materials, mixing and stirring, injecting into a mold, solidifying to obtain a blank, wherein the ratio of the raw materials to the clear water is 20:4, and adding Fe2O3；
Primary sintering: soaking the blank in a wax solution for 4min, cooling to normal temperature, placing the blank in a heating furnace, and heating for 6h at the temperature of 1000 ℃ during primary sintering;
sintering of a finished product: taking out the blank from the heating, and putting the blank into a sintering furnace for sintering to obtain a ceramic finished product, wherein the sintering in the sintering furnace comprises the following steps:
i, primary heating: heating at 1200 deg.C for 5 min;
II, high-temperature sintering: the blank is rotated at a speed of 38r/min and simultaneously the temperature is raised to 1400 ℃ for sintering.
Comparative example 2
As shown in fig. 1, a method for preparing a ceramic for a ceramic sensor, the method comprising the steps of:
mixing raw materials: mixing and grinding the raw materials into powder, calcining the raw materials, and screening after the calcination is finished, wherein the raw materials adopted in the raw material mixing process are prepared from the following components in parts by weight: al (Al)2O325 parts of ZrO246 parts of TiO250 parts of SrO 8, 7 parts of talcum powder, 7 parts of cordierite, 16 parts of lithium carbonate and 14 parts of pyrochlore, and the raw materials comprise the following steps during calcination:
(1) and low-temperature drying: firstly, drying the raw materials at the temperature of 50 ℃;
(2) and medium-temperature heating: after drying, heating to 600 ℃, and extruding the raw materials;
(3) and high-temperature calcination: heating at medium temperature, heating to 1100 deg.C, and calcining for 15 min;
manufacturing an external mold: adding clear water into the sieved raw materials, mixing, stirring, injecting into a mold, solidifying to obtain a blank, wherein the ratio of the raw materials to the clear water is 20:4, and adding Fe2O3；
Primary sintering: soaking the blank in a wax solution for 4min, cooling to normal temperature, placing the blank in a heating furnace, filling graphite particles with the diameter of 3mm, and heating for 6h at the temperature of 1000 ℃ during primary sintering;
sintering of a finished product: taking out the blank from the heating, and putting the blank into a sintering furnace for sintering to obtain a ceramic finished product, wherein the sintering in the sintering furnace comprises the following steps:
i, primary heating: heating at 1200 deg.C for 5 min;
II, high-temperature sintering: the blank is rotated at a speed of 38r/min and simultaneously the temperature is raised to 1400 ℃ for sintering.
Examples
As shown in fig. 1, a method for preparing a ceramic for a ceramic sensor, the method comprising the steps of:
mixing raw materials: mixing and grinding the raw materials into powder, calcining the raw materials, and screening after the calcination is finished, wherein the raw materials adopted in the raw material mixing process are prepared from the following components in parts by weight: al (Al)2O325 parts of ZrO246 parts of TiO250 parts of SrO 8, 7 parts of talcum powder, 7 parts of cordierite, 16 parts of lithium carbonate and 14 parts of pyrochlore, and the raw materials comprise the following steps during calcination:
(1) and low-temperature drying: firstly, drying the raw materials at the temperature of 50 ℃;
(2) and medium-temperature heating: after drying, heating to 600 ℃, and extruding the raw materials;
(3) and high-temperature calcination: heating at medium temperature, heating to 1100 deg.C, and calcining for 15 min;
manufacturing an external mold: adding clear water into the sieved raw materials, mixing and stirring, injecting into a first mold to form an outer mold, wherein the ratio of the raw materials to the clear water is 20:4, and adding Fe2O3After the first mold is injected, the mold is rotated at the rotating speed of 400 r/min;
manufacturing a blank body: bonding a metal net on the inner wall of the outer mold, simultaneously placing the outer mold into a second mold, injecting raw materials, and solidifying to obtain a blank, wherein the diameter of the metal net is 0.5mm, and the mesh number is 50 meshes;
primary sintering: soaking the blank in a wax solution for 4min, cooling to normal temperature, placing the blank in a heating furnace, filling graphite particles with the diameter of 3mm, and heating for 6h at the temperature of 1000 ℃ during primary sintering;
sintering of a finished product: taking out the blank from the heating, and putting the blank into a sintering furnace for sintering to obtain a ceramic finished product, wherein the sintering in the sintering furnace comprises the following steps:
i, primary heating: heating at 1200 deg.C for 5 min;
II, high-temperature sintering: the blank is rotated at a speed of 38r/min and simultaneously the temperature is raised to 1400 ℃ for sintering.
In table 1, comparative example 1 is a test in which no metal mesh is used and no graphite particles are used during sintering, and comparative example 2 is a test in which no graphite particles are used during sintering, and the hardness and the occurrence of chipping during breakage of the finished product are examined, and the test results are as follows:
Figure BDA0002689642670000051
TABLE 1
Can know by table 1 experimental data, can know through comparison 1 and comparison 2 contrast, through set up the metal mesh in the inside of pottery, can be when the pottery is cracked, carry out the temporary connection to broken pottery, avoid broken piece, enter into among the electronic device, secondly, can know by comparison 2 and embodiment contrast in addition, fill the graphite granule when preliminary sintering, the homogeneity when can improving pottery is heated, make ceramic surface form with the shell of a stereoplasm, when avoiding later high temperature sintering, shrink fast, thereby improve the homogeneity of the inside material distribution of pottery, make its hardness obtain promoting.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (8)

1. A method for preparing a ceramic for a ceramic sensor, the method comprising the steps of:
mixing raw materials: mixing and grinding the raw materials into powder, calcining the raw materials, and screening after the calcination is finished;
manufacturing an external mold: adding clear water into the screened raw materials, mixing and stirring, and injecting into a first mold to form to obtain an outer mold;
manufacturing a blank body: bonding the metal net on the inner wall of the outer mold, simultaneously placing the outer mold into a second mold, injecting raw materials, and solidifying to obtain a blank;
primary sintering: soaking the blank in a wax solution for 3-5min, cooling to normal temperature, placing the blank in a heating furnace, and filling graphite particles;
sintering of a finished product: and taking out the blank body from the heating, and putting the blank body into a sintering furnace for sintering to obtain a ceramic finished product.
2. The method for preparing a ceramic for a ceramic sensor according to claim 1, wherein: the raw materials adopted in the mixing process of the raw materials comprise the following components in parts by weight: al (Al)2O320 to 28 portions of ZrO245 to 48 portions of TiO250-55 parts of SrO, 5-12 parts of talcum powder, 5-10 parts of cordierite, 16-18 parts of lithium carbonate and 14-15 parts of pyrochlore.
3. The method for preparing a ceramic for a ceramic sensor according to claim 1, wherein: the raw material calcination comprises the following steps:
(1) and low-temperature drying: firstly, drying the raw materials at the temperature of 50-58 ℃;
(2) and medium-temperature heating: after drying, heating to 500-650 ℃, and extruding the raw materials;
(3) and high-temperature calcination: after heating at the medium temperature, heating to 1100-1200 ℃, and calcining for 10-15 min.
4. The method for preparing a ceramic for a ceramic sensor according to claim 1, wherein: when the raw material was sieved, a 400-mesh sieve was used for sieving.
5. The method for preparing a ceramic for a ceramic sensor according to claim 1, wherein: when the outer mold is manufactured, the ratio of the raw materials to the clear water is 20:4-5, and Fe is added2O3After the first mold is injected, the mold is rotated at a rotation speed of 400-.
6. The method for preparing a ceramic for a ceramic sensor according to claim 1, wherein: when the blank is made, the diameter of the metal net is 0.5-1mm, and the mesh number is 50-200 meshes.
7. The method for preparing a ceramic for a ceramic sensor according to claim 1, wherein: during primary sintering, the diameter of graphite particles is 2-5mm, the temperature during primary sintering is 1000-1100 ℃, and heating is carried out for 5-8 h.
8. The method for preparing a ceramic for a ceramic sensor according to claim 1, wherein: the sintering process in the sintering furnace comprises the following steps:
i, primary heating: firstly heating at the temperature of 1200-1300 ℃ for 5-6 min;
II, high-temperature sintering: rotating the blank at a rotation speed of 35-40r/min, and simultaneously heating to 1400-1600 ℃ for sintering.
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CN1088898A (en) * 1992-12-28 1994-07-06 有限会社亚道陶瓷研究所 Ceramic sintered products with metallic bones
CN102353081A (en) * 2011-06-15 2012-02-15 朱巧荣 Ceramic plate and its production technology
CN103771892A (en) * 2014-01-02 2014-05-07 大连金玛硼业科技集团有限公司 Metal reinforced ceramic plate and manufacturing method thereof
CN103833355A (en) * 2014-01-02 2014-06-04 佛山市东方智柏纳米材料科技有限公司 Preparation method for black ZrAlYOC ceramic gland die with novel structure
CN104613776A (en) * 2014-12-29 2015-05-13 临沂临虹无机材料有限公司 Zirconia ceramic composite material, manufacturing method thereof and method for sintering zirconia ceramic composite material on metal mesh
CN107140994A (en) * 2017-05-16 2017-09-08 山东大学 A kind of hot pressed sintering preparation technology for improving ceramic material consistency

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1088898A (en) * 1992-12-28 1994-07-06 有限会社亚道陶瓷研究所 Ceramic sintered products with metallic bones
CN102353081A (en) * 2011-06-15 2012-02-15 朱巧荣 Ceramic plate and its production technology
CN103771892A (en) * 2014-01-02 2014-05-07 大连金玛硼业科技集团有限公司 Metal reinforced ceramic plate and manufacturing method thereof
CN103833355A (en) * 2014-01-02 2014-06-04 佛山市东方智柏纳米材料科技有限公司 Preparation method for black ZrAlYOC ceramic gland die with novel structure
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