A sintering container, sintering process and preparation process of zinc oxide resistor

Abstract

The present invention relates to the field of resistor manufacturing, and in particular to a sintering container, sintering process and preparation process of a zinc oxide resistor. The present invention provides a sintering container for a zinc oxide resistor, wherein the sintering container is a sagger; the sagger includes a sagger cavity and a sagger cover; the sagger is made of ceramic material, and its components, in terms of mass percentage, include: Al2O3: ≥71%; SiO2: ≤13%; Y2O3: ≤15%; Fe2O3: ≤0.8%; TiO2: ≤0.2%; a protective coating is provided on the lower surface of the inner part of the sagger cavity; the coating forming the protective coating includes the following components in mass ratios: CaO≤26%; Al2O3: ≥61%; ZrO2≤10%; silica sol≤3%. The sagger provided by the present invention can not only ensure the cleanliness and flatness of the resistor, but also avoid the use of pads or pads, thus solving the problems faced by the current resistor manufacturing technology field.

Description

Technical Field

[0001] The invention relates to the field of resistor manufacturing, and in particular to a sintering container, a sintering process and a preparation process of a zinc oxide resistor. Background Art

[0002] In the field of zinc oxide resistor manufacturing technology, the sintering of resistors is a key link. The sintering process usually involves placing the resistor in a special sagger and then performing heat treatment at high temperature to achieve the desired physical and electrical properties of the resistor. In this process, in order to prevent the resistor from sticking to the sagger, a pad is usually placed between the resistor and the sagger. However, this method has some problems. For example, the pad needs to be placed manually, and the pad needs to be scraped flat each time after sintering, which not only increases the workload, but also may result in poor flatness of the resistor.

[0003] In order to solve this problem, a new solution has been proposed in the prior art, which is to use a pad to replace the pad. This method can effectively solve the problem of resistor cleaning, but the pad is prone to deformation after repeated use, which is not conducive to the sintering effect of the resistor, and the pad needs to be replaced manually, which undoubtedly increases production costs and workload.

[0004] In summary, the existing resistor sintering technology has the following major problems: First, the pads need to be placed manually, and the pads need to be scraped flat each time after sintering, which not only increases the workload but also may lead to poor flatness of the resistor; second, if a pad is used, although the problem of resistor cleaning can be solved, the pad is prone to deformation after repeated use, which is not conducive to the sintering effect of the resistor, and the pad needs to be replaced manually, which undoubtedly increases production costs and workload. Summary of the invention

[0005] In view of this, the present invention provides a sintering container, sintering process and preparation process of a zinc oxide resistor. The sagger provided by the present invention can ensure the cleanliness and flatness of the resistor and avoid the use of pads or pads, thus solving the problems faced by the current resistor manufacturing technology field.

[0006] The present invention provides a sintering container for a zinc oxide resistor, wherein the sintering container is a sagger; the sagger comprises a sagger cavity and a sagger cover;

[0007] The sagger is made of ceramic material, and its components, by mass percentage, include:

[0008] Al2O3: ≥71%;

[0009] SiO2: ≤13%;

[0010] Y2O3: ≤15%;

[0011] Fe2O3: ≤0.8%;

[0012] TiO2: ≤0.2%;

[0013] A protective coating is provided on the lower surface of the interior of the sagger cavity;

[0014] The coating material forming the protective coating comprises the following components in mass ratio:

[0015] CaO: ≤26%;

[0016] Al2O3: ≥61%;

[0017] ZrO2: ≤10%;

[0018] Silica sol: ≤3%.

[0019] Preferably, in terms of mass percentage, the ingredients of the sagger include:

[0020] SiO2: 10%~13%;

[0021] Y2O3: 12%~15%;

[0022] Fe2O3: ≤0.8%;

[0023] TiO2: ≤0.2%;

[0024] Al2O3: Balance.

[0025] Preferably, the coating comprises:

[0026] CaO: 20%~26%;

[0027] ZrO2: 8%~10%;

[0028] Silica sol: 2% to 3%;

[0029] Al2O3: Balance.

[0030] The present invention also provides a sintering process for a zinc oxide resistor, comprising:

[0031] The zinc oxide resistor to be sintered is placed in a sintering container; then, it is transferred to a sintering device for sintering;

[0032] in,

[0033] The sintering container is the sintering container of the zinc oxide resistor described in the above technical solution;

[0034] The step of placing the zinc oxide resistor to be sintered into the sintering container specifically includes: placing the zinc oxide resistor to be sintered into the sintering container cavity, and covering the sagger lid.

[0035] The present invention also provides a process for preparing a zinc oxide resistor, comprising:

[0036] Sintering the zinc oxide resistor to be sintered, and then performing post-processing to obtain the zinc oxide resistor;

[0037] Wherein, the sintering adopts the sintering process described in the above technical solution.

[0038] Preferably, the post-processing includes: side insulation processing and end surface aluminum spraying.

[0039] The present invention adopts a sagger (composed of a sagger cavity and a sagger cover) as a sintering container for zinc oxide resistors, and a specific high temperature resistant coating (CaO: ≤26%; Al2O3: ≥61%; ZrO2: ≤10%; silica sol: ≤3%) is provided on the lower surface of the inner part of the sagger cavity, which can effectively improve the contact mode between the resistor and the sagger, and does not need to use a pad or a pad, thereby avoiding the adhesion of the resistor and the sagger, and improving the cleanliness and flatness of the resistor. Moreover, the present invention adopts a sagger with a specific chemical composition, and this chemical composition ratio can make the new sagger have better high temperature resistance and stability, which is conducive to assisting in improving the adhesion problem between the sagger and the resistor after sintering, thereby helping to improve the sintering quality and production efficiency of the resistor, and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0041] Figure 1 It is a schematic diagram of the structure of the sagger cavity in the sintering container of the present invention;

[0042] Figure 2 It is a schematic diagram of the structure of the sagger cover in the sintering container of the present invention;

[0043] Figure 3 Schematic diagram of the structure of zinc oxide resistors loaded into the sagger. DETAILED DESCRIPTION

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0045] In this article, the technical features described in an open manner include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features.

[0046] Herein, when it comes to numerical ranges, unless otherwise specified, the numerical ranges are deemed to be continuous and include the minimum and maximum values ​​of the range, as well as every value between such minimum and maximum values. Further, when a range refers to an integer, every integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe features or characteristics, the ranges can be merged. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges included therein.

[0047] The present invention provides a sintering container for a zinc oxide resistor, wherein the sintering container is a sagger; the sagger comprises a sagger cavity and a sagger cover;

[0048] The sagger is made of ceramic material, and its components, by mass percentage, include:

[0049] Al2O3: ≥71%;

[0050] SiO2: ≤13%;

[0051] Y2O3: ≤15%;

[0052] Fe2O3: ≤0.8%;

[0053] TiO2: ≤0.2%;

[0054] A protective coating is provided on the lower surface of the interior of the sagger cavity;

[0055] The coating material forming the protective coating comprises the following components in mass ratio:

[0056] CaO: ≤26%;

[0057] Al2O3: ≥61%;

[0058] ZrO2: ≤10%;

[0059] Silica sol: ≤3%.

[0060] In the present invention, regarding the ceramic material of the sagger, the sum of the contents of the above five components is preferably 100%.

[0061] In the present invention, preferably, the components of the sagger include, by mass percentage:

[0062] SiO2: 10%~13%;

[0063] Y2O3: 12%~15%;

[0064] Fe2O3: ≤0.8%;

[0065] TiO2: ≤0.2%;

[0066] Al2O3: Balance.

[0067] in,

[0068] The Al2O3 content can be 71%, 72%, 73%, 74%, 75%, etc. The SiO2 content is more preferably 10% to 13%, and can be 10%, 11%, 12%, 13%. The Y2O3 content is more preferably 12% to 15%, and can be 12%, 13%, 14%, 15%. The Fe2O3 content can be 0.5%, 0.6%, 0.7%, 0.8%. The TiO2 content can be 0.2%.

[0069] In some embodiments of the present invention, the composition of the sagger is as follows: Al2O3 72.3%, SiO2 12%, Y2O3 15%, Fe2O3 0.5%, TiO2 0.2%.

[0070] The present invention has no special restrictions on the preparation method of the above-mentioned ceramic material. It can be carried out according to the conventional preparation process of ceramics. The raw materials used can be the conventional raw materials for preparing ceramics. It only needs to be prepared by combining the raw materials according to the above-mentioned target composition of the present invention.

[0071] In the present invention, the lower surface of the inner part of the sagger cavity is provided with a protective coating. The inner surface of the sagger cavity includes a plurality of side surfaces and a lower surface of a bottom, and the present invention is to provide a protective coating on the lower surface.

[0072] In the present invention, the protective coating is formed by a coating; the coating comprises the following components in mass ratio:

[0073] CaO: ≤26%;

[0074] Al2O3: ≥61%;

[0075] ZrO2: ≤10%;

[0076] Silica sol: ≤3%.

[0077] In the present invention, the content of the above four components is preferably 100%.

[0078] In the present invention, preferably, the coating comprises the following components in mass ratio:

[0079] CaO: 20%~26%;

[0080] ZrO2: 8%~10%;

[0081] Silica sol: 2% to 3%;

[0082] Al2O3: Balance.

[0083] in,

[0084] The specific content of CaO can be 20%, 22%, 24%, 25%, 26%. The specific content of ZrO2 can be 8%, 9%, 10%. The specific content of silica sol can be 2%, 3%. The specific content of Al2O3 can be 65%, 66%, 67%.

[0085] The present invention has no special limitation on the preparation method of the above coating, and the above four raw materials (CaO, ZrO2, Al2O3, silica sol) are mixed evenly.

[0086] In the present invention, the method for forming the protective coating comprises: applying the coating on the lower surface of the inner part of the sagger cavity, and then sintering to form the protective coating. The sintering temperature is preferably 1150°C; and the sintering holding time is preferably 1 to 3 hours.

[0087] In the present invention, the thickness of the protective coating is 0.3-0.5 mm, specifically 0.3 mm, 0.4 mm, or 0.5 mm.

[0088] See also Figure 1-2 , Figure 1 It is a schematic diagram of the structure of the sagger cavity in the sintering container of the present invention, Figure 2 It is a schematic structural diagram of the sagger cover in the sintering container of the present invention.

[0089] The sagger provided by the present invention is provided with a specific high-temperature resistant coating on the lower surface of the inner part of the sagger cavity. After sintering, the resistor sheet and the sagger will not stick together, thereby protecting the quality of the sagger and the resistor sheet, ensuring the cleanliness and flatness of the resistor sheet, and avoiding the use of pads or pads, thereby solving the difficult problems faced by the current resistor sheet manufacturing technology field.

[0090] The present invention also provides a sintering process for a zinc oxide resistor, comprising:

[0091] The zinc oxide resistor to be sintered is placed in a sintering container; then, it is transferred to a sintering device for sintering;

[0092] in,

[0093] The sintering container is the sintering container of the zinc oxide resistor described in the above technical solution;

[0094] The step of placing the zinc oxide resistor to be sintered into the sintering container specifically includes: placing the zinc oxide resistor to be sintered into the sintering container cavity, and covering the sagger lid.

[0095] See also Figure 3 , Figure 3 Schematic diagram of the structure of zinc oxide resistors loaded into the sagger.

[0096] In some embodiments of the present invention, the dimensions of the sagger cavity are: 340 mm in length×340 mm in width×50 mm in height.

[0097] Put the zinc oxide resistor to be sintered into the sagger cavity, cover the sagger cover, move it to the sintering device, start the sintering device, and start the sintering process. During this process, the sintering device will automatically control the sintering temperature and sintering time to ensure the sintering quality of the resistor. There is no special restriction on the process parameters of the above sintering process, and it can be performed according to the conventional sintering process in the art.

[0098] The present invention also provides a process for preparing a zinc oxide resistor, comprising:

[0099] Sintering the zinc oxide resistor to be sintered, and then performing post-processing to obtain the zinc oxide resistor;

[0100] Wherein, the sintering adopts the sintering process described in the above technical solution.

[0101] In the present invention, the post-treatment preferably includes: side insulation treatment and end surface aluminum spraying. The side insulation treatment and end surface aluminum spraying electrode operation are not particularly limited and can be performed according to conventional surface treatment methods in the art of preparing zinc oxide resistors.

[0102] The present invention adopts a sagger (composed of a sagger cavity and a sagger cover) as a sintering container for zinc oxide resistors, and a specific high temperature resistant coating (CaO: ≤26%; Al2O3: ≥61%; ZrO2: ≤10%; silica sol: ≤3%) is provided on the lower surface of the inner part of the sagger cavity, which can effectively improve the contact mode between the resistor and the sagger, and does not need to use a pad or a pad, thereby avoiding the adhesion of the resistor and the sagger, and improving the cleanliness and flatness of the resistor. Moreover, the present invention adopts a sagger with a specific chemical composition, and this chemical composition ratio can make the new sagger have better high temperature resistance and stability, which is conducive to assisting in improving the adhesion problem between the sagger and the resistor after sintering, thereby helping to improve the sintering quality and production efficiency of the resistor, and reducing the production cost.

[0103] Compared with the existing technology, the beneficial effects of the present technical solution are as follows: 1. Improve efficiency: The new zinc oxide resistor sintering device provided by the present invention does not require manual placement of pads or pads, which greatly reduces the workload and improves production efficiency. 2. Improve quality: The device of the present invention makes the resistor clean and flat. Compared with the traditional method, it can effectively avoid the problem of poor flatness of the resistor caused by the pads not being scraped flat, thereby improving the quality of the product. 3. Reduce costs: Since the device of the present invention does not require manual replacement of pads, the production cost is reduced. At the same time, the chemical composition ratio of the new sagger is optimized, making it less likely to deform after repeated use, thereby further reducing the production cost. 4. Adapt to automated production: The device of the present invention is reasonably designed and suitable for automated production, meeting the modern industry's production needs for high efficiency, high quality and low cost.

[0104] In order to further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0105] Example 1

[0106] 1. Provide sagger

[0107] The sagger is composed of a sagger cavity and a sagger cover. The size of the sagger cavity is 340mm×340mm×50mm. The chemical composition of the sagger includes: Al2O3 72.3%, SiO2 12%, Y2O3 15%, Fe2O3 0.5%, TiO2 0.2%.

[0108] The inner lower surface of the sagger cavity is provided with a protective coating, and the coating material forming the protective coating includes: CaO 24%; Al2O3: 65%; ZrO2 8%; silica sol 3%. The coating thickness is 0.5 mm.

[0109] 2. Resistor sintering

[0110] Place the D52 zinc oxide resistor to be sintered into the sagger cavity and cover the sagger lid. Then, place the sagger with the resistor into the sintering device, start the sintering device, and start the sintering process. After sintering, take out the sintered resistor, check its cleanliness and flatness, send the resistor to the grinder to observe its upper and lower end faces, perform side insulation treatment and spray aluminum on the end faces for testing.

[0111] Example 2

[0112] 1. Provide sagger

[0113] The sagger is composed of a sagger cavity and a sagger cover. The size of the sagger cavity is 340mm×340mm×50mm. The chemical composition of the sagger includes: Al2O3 72.3%, SiO2 12%, Y2O3 15%, Fe2O3 0.5%, TiO2 0.2%.

[0114] The inner lower surface of the sagger cavity is provided with a protective coating, and the coating material forming the protective coating comprises: CaO 22%; Al2O3: 66%; ZrO2 9%; silica sol 3%. The coating thickness is 0.4 mm.

[0115] 2. Resistor sintering

[0116] Place the D71 zinc oxide resistor to be sintered into the sagger cavity and cover the sagger lid. Then, place the sagger with the resistor into the sintering device, start the sintering device, and start the sintering process. After sintering, take out the sintered resistor, check its cleanliness and flatness, send the resistor to the grinder to observe its upper and lower end faces, perform side insulation treatment and spray aluminum on the end faces for testing.

[0117] Example 3

[0118] 1. Provide sagger

[0119] The sagger is composed of a sagger cavity and a sagger cover. The size of the sagger cavity is 340mm×340mm×50mm. The chemical composition of the sagger includes: Al2O3 72.3%, SiO2 12%, Y2O3 15%, Fe2O3 0.5%, TiO2 0.2%.

[0120] The inner lower surface of the sagger cavity is provided with a protective coating, and the coating material forming the protective coating comprises: CaO 20%; Al2O3: 67%; ZrO2 10%; silica sol 3%. The coating thickness is 0.4 mm.

[0121] 2. Resistor sintering

[0122] Place the D105 zinc oxide resistor to be sintered into the sagger cavity and cover the sagger lid. Then, place the sagger with the resistor into the sintering device, start the sintering device, and start the sintering process. After sintering, take out the sintered resistor, check its cleanliness and flatness, send the resistor to the grinder to observe its upper and lower end faces, perform side insulation treatment and spray aluminum on the end faces for testing.

[0123] Product Testing :

[0124] Various tests were performed on the products of Examples 1-3, and the results are shown in Table 1.

[0125] Table 1: Test results of Examples 1-3

[0126]

[0127] Note: The levelness is tested with a levelness tester, and multiple points are taken for testing on each end face.

[0128] The results show that the cleanliness and flatness of the resistor are significantly improved and the use of the sagger has no effect on the electrical properties of the resistor, meeting the needs of automated production.

[0129] Due to the advanced nature of the present invention, it can be widely used in application fields such as zinc oxide resistor manufacturing, ceramic sintering equipment, and semiconductor device manufacturing. First, the new zinc oxide resistor sintering container provided by the present invention can effectively improve the cleanliness and flatness of the resistor, thereby improving the quality and performance of the resistor, and meeting the demand for high-quality products in the field of zinc oxide resistor manufacturing. Secondly, the device of the present invention avoids the problem of manually placing pads or pads in traditional methods, reduces the workload of workers, improves production efficiency, and meets the demand for efficient and automated production equipment in the field of ceramic sintering equipment. Finally, the device of the present invention can also be used in the field of semiconductor device manufacturing to improve the performance and quality of semiconductor devices. Therefore, the present invention has broad market demand and good application prospects.

[0130] Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas, including the best mode, and also enable any technician in the field to practice the present invention, including making and using any device or system, and implementing any combined method. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention. The scope of patent protection of the present invention is defined by the claims and may include other embodiments that can be thought of by those skilled in the art. If these other embodiments have structural elements similar to the literal expression of the claims, or if they include equivalent structural elements that are not substantially different from the literal expression of the claims, then these other embodiments should also be included in the scope of the claims.

Claims

1. A sintered container for a zinc oxide resistor, characterized in that: The sintering container is a sagger; the sagger comprises a sagger cavity and a sagger cover; The sagger is made of ceramic material, and its components, by mass percentage, include: Al2O3: ≥71%; SiO2: ≤13%; Y2O3: ≤15%; Fe2O3: ≤0.8%; TiO2: ≤0.2%; A protective coating is provided on the lower surface of the interior of the sagger cavity; The coating material forming the protective coating comprises the following components in mass ratio: CaO: ≤26%; Al2O3: ≥61%; ZrO2: ≤10%; Silica sol: ≤3%.

2. The sintering container according to claim 1, characterized in that: In terms of mass percentage, the components of the sagger include: SiO2: 10%~13%; Y2O3: 12%~15%; Fe2O3: ≤0.8%; TiO2: ≤0.2%; Al2O3: Balance.

3. The sintering container according to claim 1, characterized in that: The coating comprises: CaO: 20%~26%; ZrO2: 8%~10%; Silica sol: 2% to 3%; Al2O3: Balance.

4. A sintering process for zinc oxide resistor, characterized in that: include: Put the zinc oxide resistor to be sintered into a sintering container; Then, it is transferred to a sintering device for sintering; in, The sintering container is a sintering container of the zinc oxide resistor according to any one of claims 1 to 3; The step of placing the zinc oxide resistor to be sintered into the sintering container specifically includes: placing the zinc oxide resistor to be sintered into the sintering container cavity, and covering the sagger lid.

5. A process for preparing a zinc oxide resistor, characterized in that: include: Sintering the zinc oxide resistor to be sintered, and then performing post-processing to obtain the zinc oxide resistor; Wherein, the sintering adopts the sintering process described in claim 4.

6. The preparation process according to claim 5, characterized in that: The post-processing includes: side insulation processing and end surface aluminum spraying.

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