A winding process suitable ceramic precursor paste and a method for preparing the same

Abstract

This invention relates to a ceramic precursor slurry suitable for winding processes and its preparation method. The slurry comprises the following components in parts by weight: 100 parts of polysilazane resin, 10-150 parts of inert filler, 10-150 parts of active filler, 10-20 parts of thixotropic agent, and 1-5 parts of accelerator. The method includes the following steps: mixing the polysilazane resin and accelerator evenly, then adding the thixotropic agent, inert filler, and active filler, followed by filtration to obtain the target product. The skeletal structure chains of the ceramic precursor of this invention, Si-C and Si-N, are consistent with the elemental composition of the generated silicon carbide, silicon nitride, and other ceramics. During the high-temperature inorganication process, only some side groups of the precursor break and are lost, resulting in a high ceramic yield. Compared with the prior art, the ceramic precursor slurry prepared by this invention has moderate viscosity, good filler dispersibility, long shelf life, low curing crosslinking temperature, and low ceramic firing temperature. The cured product after molding is crack-free, has a high ceramic yield, and the preparation process is simple and efficient.

Description

Technical Field

[0001] This invention belongs to the field of ceramic precursor technology, and relates to a ceramic precursor slurry suitable for winding process and its preparation method. Background Technology

[0002] In recent years, with the rapid development of high-temperature resistant continuous fiber reinforced ceramic matrix composites in high-tech fields such as aerospace structural components, high-temperature engines, and nuclear reactors, there is an urgent need for ceramic matrix materials with good processability. The traditional ceramic material preparation process involves micronized powder preparation, pressing, sintering, and processing. However, this traditional method is complex, involves high sintering temperatures, and causes severe fiber damage during ceramic preparation, resulting in poor material reliability. Composite materials prepared by infiltrating a ceramic matrix into a fiber preform using chemical vapor deposition exhibit good high-temperature resistance and can be produced fully automatically. However, this method has a long production cycle, high equipment requirements, high gas and energy consumption, high cost, and limited material thickness, thus significantly limiting its application. Therefore, precursor polymers have attracted increasing attention due to their strong structural designability, excellent molding and processing performance, and the ability to prepare various forms of ceramic materials.

[0003] For applications requiring the fabrication of ceramic matrix composite preforms using filament winding, a key technical challenge is selecting a precursor polymer with suitable viscosity, which depends on the composition of the ceramic precursor slurry. Currently, the main ceramic precursors used in China are polycarbosilane, polysilazane, and polysiloxane. Polycarbosilane is a linear solid polymer precursor that requires dissolution or melting in a solvent before cross-linking and molding, resulting in a complex process. Polysiloxane has low viscosity, making its temperature resistance unsuitable for applications. While polysilazane is chosen as a precursor resin, its viscosity is too low to meet the viscosity requirements for filament winding of ceramic matrix composite preforms. This results in low resin content after winding, brittle cured products prone to cracking, and low ceramic yield. Therefore, it is necessary to develop a ceramic precursor slurry suitable for filament winding. Summary of the Invention

[0004] The purpose of this invention is to provide a ceramic precursor slurry suitable for winding process and its preparation method, so as to overcome the defects of the prior art such as low precursor resin viscosity, low ceramic yield or easy cracking of cured product.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] One of the technical solutions of the present invention provides a ceramic precursor slurry suitable for winding process. The slurry comprises the following components in parts by weight: 100 parts of polysilazane resin, 10-150 parts of inert filler, 10-150 parts of active filler, 10-20 parts of thixotropic agent, and 1-5 parts of accelerator.

[0007] Furthermore, the polysilazane resin is a liquid vinyl polysilazane resin.

[0008] Furthermore, the molecular weight of the liquid vinyl polysilazane resin is less than 1.0 × 10⁻⁶. 3 .

[0009] Furthermore, the structural formula of the liquid vinyl polysilazane resin is as follows:

[0010]

[0011] Where n = 5 to 10, n can be 5, 6, 7, 8, 9 or 10.

[0012] Furthermore, the inert filler is one or more of the following: silica powder, silicon nitride powder, silicon carbide powder, boron nitride powder, and alumina powder.

[0013] Furthermore, the particle size of the inert filler is 0.1–100 μm.

[0014] Furthermore, the active filler is a pure metal or an intermetallic compound, including one or more of aluminum, chromium, zirconium, chromium silicide, molybdenum silicide, and titanium silicide.

[0015] Furthermore, the thixotropic agent is one or more of fumed silica, bentonite, and attapulgite.

[0016] Furthermore, the accelerator is one or more of methyl ethyl ketone peroxide, benzoyl peroxide, tert-butyl peroxide, dicumyl peroxide, and chloroplatinic acid.

[0017] The second technical solution of the present invention provides a method for preparing the ceramic precursor slurry as described above, the method being:

[0018] Take polysilazane resin and accelerator, mix them evenly, then add thixotropic agent, inert filler and active filler, and filter to obtain the target product.

[0019] The skeletal structure chains Si-C and Si-N of the ceramic precursor of this invention are consistent with the elemental composition of the generated silicon carbide, silicon nitride and other ceramics. During the high-temperature inorganication process, only some side groups of the precursor are broken and lost. The addition of active and inert fillers reduces the volume shrinkage caused by the cracking of the precursor.

[0020] The liquid vinyl polysilazane resin in the ceramic precursor slurry of this invention is a polymer containing -Si-N- repeating units, which can be converted into SiCN ceramics through high-temperature pyrolysis. In this invention, the addition of an accelerator helps the vinyl groups in the slurry to cure and crosslink at low temperatures, increasing the final ceramic yield. The active filler reacts with the Si generated during the pyrolysis of the liquid vinyl polysilazane resin at high temperatures, generating silicide microcrystals, and simultaneously promotes the ceramicization transformation process of the liquid vinyl polysilazane resin. The final pyrolysis product is amorphous SiCN ceramic, with Si3N4, SiC, and silicide microcrystals dispersed within the amorphous ceramic, contributing to improved material strength. The inert filler does not undergo chemical changes during the pyrolysis of the liquid vinyl polysilazane resin, but can, to some extent, inhibit the volume shrinkage of the ceramic product and reduce costs. The addition of a thixotropic agent is to adjust the viscosity of the precursor slurry to meet the requirements of the winding process.

[0021] This invention limits the component ratio of the ceramic precursor slurry system for three main reasons: first, to meet the viscosity requirements of the winding process (500–1000 mP·s); second, to improve the interfacial bonding strength between the precursor slurry and the reinforcement; and third, to increase ceramic yield and reduce the porosity of the ceramic matrix after carbonization. If the components of the ceramic precursor slurry system exceed this limit, the above requirements cannot be met. Specifically, excessive accelerator addition will cause the crosslinking reaction to be overly vigorous, adversely affecting product performance and rendering the product unusable; conversely, insufficient accelerator will result in a slow crosslinking reaction rate, increasing reaction time and reducing efficiency. Excessive addition of inert or active fillers will lead to increased precursor slurry viscosity and fiber reinforcement breakage; insufficient addition of inert or active fillers will weaken the interfacial bonding strength between the precursor slurry and the reinforcement, making it impossible to obtain a high-density ceramic matrix. If too much thixotropic agent is added, the viscosity of the precursor slurry will be too high, failing to meet the requirements of the winding process; if too little thixotropic agent is added, the viscosity of the precursor slurry will be too low, resulting in weak interfacial interaction when combined with the reinforcement.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The ceramic precursor slurry prepared by the present invention has a moderate viscosity, which can meet the viscosity requirements for preparing ceramic matrix composite preforms by winding process;

[0024] (2) The ceramic precursor slurry prepared by the present invention has a high ceramic yield. The skeletal structure chains of the ceramic precursor, Si-C and Si-N, are consistent with the elemental composition of the generated silicon carbide, silicon nitride and other ceramics. Only some side groups of the precursor are broken and lost during the high-temperature inorganication process.

[0025] (3) The ceramic precursor slurry prepared by the present invention has a low curing crosslinking temperature and a low ceramic firing temperature. The precursor can be cured at below 200°C, and the cured product after molding is free from cracking and can be mechanically processed and demolded. The cured crosslinked product can be decomposed at 1200°C, which reduces energy consumption.

[0026] (4) The ceramic precursor slurry prepared by the present invention has good processability and can be used for the molding and preparation of ceramic matrix composite preforms by using mature winding technology and equipment. Compared with the traditional braided impregnation-curing-pyrolysis process, the molding process of the present invention is simpler, more efficient and lower in cost, thus updating and enriching the preparation process of ceramic matrix composites. Detailed Implementation

[0027] The present invention will now be described in detail with reference to specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0028] Unless otherwise specified, the raw materials or processing steps used in the following embodiments indicate the use of existing conventional commercially available products or conventional technologies.

[0029] In the following embodiments, the vinyl polysilazane resin used was purchased from Cooper Chemical (Shanghai) Co., Ltd., brand name 8812.

[0030] In the following embodiments, the particle size of the inert fillers (silicon dioxide powder, silicon nitride powder, silicon carbide powder, boron nitride powder, and alumina powder) used is 0.1–100 μm.

[0031] Example 1:

[0032] The preparation steps of a winding process for ceramic precursor slurry are as follows:

[0033] (1) Weigh 100 parts of vinyl polysilazane resin into a barrel according to the mass ratio, add 2 parts of dicumyl peroxide under constant stirring, and stir for 30 minutes to obtain a homogeneous and transparent solution.

[0034] (2) Weigh 10 parts of fumed silica by mass ratio and add it to the transparent solution in step (1). Stir until a uniform liquid is obtained. Then add 50 parts of silica powder, 50 parts of silicon carbide powder and 10 parts of chromium silicide. After grinding, dispersing and stirring, a slurry of a certain viscosity is obtained. After filtration, the material is discharged and packaged to obtain the target product.

[0035] The viscosity, curing crosslinking temperature, ceramization temperature, and ceramic yield of the prepared ceramic precursor slurry are shown in Table 1. Compared with the ceramic precursor slurry prepared in Comparative Example 1, the ceramic precursor slurry in this embodiment showed a lower curing crosslinking temperature and a higher ceramic yield after the addition of the accelerator dicumyl peroxide, indicating that the addition of the accelerator dicumyl peroxide helps the vinyl groups in the slurry to cure and crosslink at low temperatures, increasing the final ceramic yield. Compared with the ceramic precursor slurry prepared in Comparative Example 2, the ceramic precursor slurry in this embodiment showed an increased viscosity and a lower curing crosslinking temperature after the addition of the thixotropic agent fumed silica. Compared with the ceramic precursor slurry prepared in Comparative Example 3, the ceramic precursor slurry in this embodiment showed an increased viscosity, a lower curing crosslinking temperature, and a higher ceramic yield after the addition of inert fillers silica powder and silicon carbide powder. Compared with the ceramic precursor slurry prepared in Comparative Example 4, the ceramic precursor slurry in this embodiment showed an increased viscosity and a higher ceramic yield after the addition of the active filler chromium carbide.

[0036] Using the ceramic precursor slurry prepared in this embodiment as the binder and carbon fiber as the reinforcement, the two are combined and a ceramic matrix composite preform is prepared by winding. After winding, the mold is closed, and the product is pressurized by tightening screws. It is then cured in an oven at 120–200°C for 2–8 hours. After the sample cools naturally, it is demolded to obtain the ceramic matrix composite preform. The ceramic matrix composite preform is placed in a carbonization furnace and heated to 1000–1200°C under a nitrogen atmosphere for ceramicization pyrolysis for 2–6 hours. After the sample cools, the ceramic matrix composite is obtained.

[0037] Example 2:

[0038] The preparation steps of a winding process applicable to ceramic precursor slurry systems are as follows:

[0039] (1) Weigh 100 parts of vinyl polysilazane resin into a barrel according to the mass ratio, add 1 part of dicumyl peroxide while stirring continuously, and stir for 30 minutes to obtain a homogeneous and transparent solution.

[0040] (2) Weigh 20 parts of fumed silica by mass ratio and add it to the transparent solution in step (1). Stir until a uniform liquid is obtained. Then add 50 parts of silica powder, 50 parts of silicon carbide powder and 15 parts of chromium silicide. After grinding, dispersing and stirring, a slurry of a certain viscosity is obtained. After filtration, the slurry is discharged and packaged to obtain the target product. The viscosity, curing crosslinking temperature, ceramization temperature and ceramic yield of the prepared ceramic precursor slurry are shown in Table 1.

[0041] Using the ceramic precursor slurry prepared in this embodiment as the binder and carbon fiber as the reinforcement, the two are combined and a ceramic matrix composite preform is prepared by winding. After winding, the mold is closed, and the product is pressurized by tightening screws. It is then cured in an oven at 120–200°C for 2–8 hours. After the sample cools naturally, it is demolded to obtain the ceramic matrix composite preform. The ceramic matrix composite preform is placed in a carbonization furnace and heated to 1000–1200°C under a nitrogen atmosphere for ceramicization pyrolysis for 2–6 hours. After the sample cools, the ceramic matrix composite is obtained.

[0042] Example 3:

[0043] The preparation steps of a winding process applicable to ceramic precursor slurry systems are as follows:

[0044] (1) Weigh 100 parts of vinyl polysilazane resin into a barrel according to the mass ratio, add 1 part of dicumyl peroxide while stirring continuously, and stir for 30 minutes to obtain a homogeneous and transparent solution.

[0045] (2) Weigh 20 parts of fumed silica by mass ratio and add it to the transparent solution in step (1). Stir until a uniform liquid is obtained. Then add 60 parts of silica powder, 70 parts of silicon carbide powder and 20 parts of molybdenum silicide. After grinding, dispersing and stirring, a slurry of a certain viscosity is obtained. After filtration, the slurry is discharged and packaged to obtain the target product. The viscosity, curing crosslinking temperature, ceramization temperature and ceramic yield of the prepared ceramic precursor slurry are shown in Table 1.

[0046] Using the ceramic precursor slurry prepared in this embodiment as the binder and carbon fiber as the reinforcement, the two are combined and a ceramic matrix composite preform is prepared by winding. After winding, the mold is closed, and the product is pressurized by tightening screws. It is then cured in an oven at 120–200°C for 2–8 hours. After the sample cools naturally, it is demolded to obtain the ceramic matrix composite preform. The ceramic matrix composite preform is placed in a carbonization furnace and heated to 1000–1200°C under a nitrogen atmosphere for ceramicization pyrolysis for 2–6 hours. After the sample cools, the ceramic matrix composite is obtained.

[0047] Example 4:

[0048] The preparation steps of a winding process applicable to ceramic precursor slurry systems are as follows:

[0049] (1) Weigh 100 parts of vinyl polysilazane resin into a barrel according to the mass ratio, add 1.5 parts of dicumyl peroxide under constant stirring, and stir for 30 minutes to obtain a homogeneous and transparent solution.

[0050] (2) Weigh 15 parts of fumed silica by mass ratio and add it to the transparent solution in step (1). Stir until a uniform liquid is obtained. Then add 80 parts of silica powder, 10 parts of silicon carbide powder and 20 parts of aluminum. After grinding, dispersing and stirring, a slurry with a certain viscosity is obtained.

[0051] (3) The above slurry was dispersed using a three-roll mill to obtain a slurry with a fineness of less than 10 micrometers. After filtration, the slurry was discharged and packaged to obtain the target product. The viscosity of the prepared ceramic precursor slurry is shown in Table 1.

[0052] Using the ceramic precursor slurry prepared in this embodiment as the binder and carbon fiber as the reinforcement, the two are combined and a ceramic matrix composite preform is prepared by winding. After winding, the mold is closed, and the product is pressurized by tightening screws. It is then cured in an oven at 120–200°C for 2–8 hours. After the sample cools naturally, it is demolded to obtain the ceramic matrix composite preform. The ceramic matrix composite preform is placed in a carbonization furnace and heated to 1000–1200°C under a nitrogen atmosphere for ceramicization pyrolysis for 2–6 hours. After the sample cools, the ceramic matrix composite is obtained.

[0053] Example 5:

[0054] The preparation steps of a winding process applicable to ceramic precursor slurry systems are as follows:

[0055] (1) Weigh 100 parts of vinyl polysilazane resin into a barrel according to the mass ratio, add 1 part of dicumyl peroxide while stirring continuously, and stir for 30 minutes to obtain a homogeneous and transparent solution.

[0056] (2) Weigh 10 parts of fumed silica by mass ratio and add it to the transparent solution in step (1). Stir until a uniform liquid is obtained. Then add 110 parts of silica powder, 10 parts of silicon carbide powder and 10 parts of chromium silicide. After grinding, dispersing and stirring, a slurry of a certain viscosity is obtained. After filtration, the slurry is discharged and packaged to obtain the target product. The viscosity, curing crosslinking temperature, ceramization temperature and ceramic yield of the prepared ceramic precursor slurry are shown in Table 1.

[0057] Using the ceramic precursor slurry prepared in this embodiment as the binder and carbon fiber as the reinforcement, the two are combined and a ceramic matrix composite preform is prepared by winding. After winding, the mold is closed, and the product is pressurized by tightening screws. It is then cured in an oven at 120–200°C for 2–8 hours. After the sample cools naturally, it is demolded to obtain the ceramic matrix composite preform. The ceramic matrix composite preform is placed in a carbonization furnace and heated to 1000–1200°C under a nitrogen atmosphere for ceramicization pyrolysis for 2–6 hours. After the sample cools, the ceramic matrix composite is obtained.

[0058] Example 6:

[0059] Compared with Example 1, most of the contents are the same, except that in this example, 50 parts of silica powder and 50 parts of silicon carbide powder are replaced with 5 parts of silica powder and 5 parts of silicon carbide powder.

[0060] Example 7:

[0061] Compared with Example 1, most of the contents are the same, except that in this example, 50 parts of silica powder and 50 parts of silicon carbide powder are replaced with 50 parts of silica powder and 100 parts of silicon carbide powder.

[0062] Example 8:

[0063] Compared with Example 1, most of the contents are the same, except that in this example, 50 parts of silica powder and 50 parts of silicon carbide powder are replaced with 100 parts of silica powder.

[0064] Example 9:

[0065] Compared with Example 1, most of the contents are the same, except that in this example, 50 parts of silicon dioxide powder and 50 parts of silicon carbide powder are replaced with 100 parts of silicon nitride powder.

[0066] Example 10:

[0067] Compared with Example 1, most of the contents are the same, except that in this example, 50 parts of silica powder and 50 parts of silicon carbide powder are replaced with 100 parts of silicon carbide powder.

[0068] Example 11:

[0069] Compared with Example 1, most of the contents are the same, except that in this example, 50 parts of silica powder and 50 parts of silicon carbide powder are replaced with 100 parts of boron nitride powder.

[0070] Example 12:

[0071] Compared with Example 1, most of the contents are the same, except that in this example, 50 parts of silica powder and 50 parts of silicon carbide powder are replaced with 100 parts of alumina powder.

[0072] Example 13:

[0073] Compared with Example 1, most of the contents are the same, except that in this example, 50 parts of silicon dioxide powder and 50 parts of silicon carbide powder are replaced with 50 parts of silicon dioxide powder, 20 parts of silicon nitride powder and 30 parts of silicon carbide powder.

[0074] Example 14:

[0075] Compared with Example 3, most of the contents are the same, except that in this example, 20 parts of molybdenum silicide are replaced with 150 parts of molybdenum silicide.

[0076] Example 15:

[0077] Compared with Example 3, most of the contents are the same, except that in this example, 20 parts of molybdenum silicide are replaced with 10 parts of molybdenum silicide.

[0078] Example 16:

[0079] Compared with Example 3, most of the contents are the same, except that in this example, 20 parts of molybdenum silicide are replaced with 20 parts of chromium.

[0080] Example 17:

[0081] Compared with Example 3, most of the contents are the same, except that in this example, 20 parts of molybdenum silicide are replaced with 20 parts of zirconium.

[0082] Example 18:

[0083] Compared with Example 3, most of the contents are the same, except that in this example, 20 parts of molybdenum silicide are replaced with 20 parts of chromium silicide.

[0084] Example 19:

[0085] Compared with Example 3, most of the contents are the same, except that in this example, 20 parts of molybdenum silicide are replaced with 20 parts of titanium silicide.

[0086] Example 20:

[0087] Compared with Example 3, most of them are the same, except that in this example, 20 parts of molybdenum silicide are replaced with 10 parts of aluminum, 3 parts of zirconium and 7 parts of chromium silicide.

[0088] Example 21:

[0089] The majority of the contents are the same as in Example 1, except that in this example, 10 parts of fumed silica are replaced with 10 parts of bentonite.

[0090] Example 22:

[0091] Compared with Example 1, most of the contents are the same, except that in this example, 10 parts of fumed silica are replaced with 10 parts of attapulgite.

[0092] Example 23:

[0093] Compared with Example 1, most of the contents are the same, except that in this example, 10 parts of fumed silica are replaced with 3 parts of attapulgite, 3 parts of fumed silica and 4 parts of bentonite.

[0094] Example 24:

[0095] Compared with Example 1, most of the contents are the same, except that in this example, 2 parts of dicumyl peroxide are replaced with 2 parts of methyl ethyl ketone peroxide.

[0096] Example 25:

[0097] Compared with Example 1, most of the contents are the same, except that in this example, 2 parts of dicumyl peroxide are replaced with 2 parts of dibenzoyl peroxide.

[0098] Example 26:

[0099] Compared with Example 1, most of the contents are the same, except that in this example, 2 parts of dicumyl peroxide are replaced with 2 parts of tert-butyl peroxide.

[0100] Example 27:

[0101] Compared with Example 1, most of the contents are the same, except that in this example, 2 parts of dicumyl peroxide are replaced with 2 parts of chloroplatinic acid.

[0102] Example 28:

[0103] Compared with Example 1, most of the components are the same, except that in this example, 2 parts of dicumyl peroxide are replaced with 0.5 parts of benzoyl peroxide, 0.5 parts of tert-butyl peroxide and 1 part of dicumyl peroxide.

[0104] Example 29:

[0105] Compared with Example 1, most of the contents are the same, except that in this example, 2 parts of dicumyl peroxide are replaced with 5 parts of dicumyl peroxide.

[0106] Comparative Example 1:

[0107] It is largely the same as Example 1, except that the accelerator diisopropylbenzene peroxide is not added.

[0108] Comparative Example 2:

[0109] It is largely the same as Example 1, except that the thixotropic fumed silica is not added.

[0110] Comparative Example 3:

[0111] It is largely the same as Example 1, except that the inert fillers silica powder and silicon carbide powder are not added.

[0112] Comparative Example 4:

[0113] It is largely the same as Example 1, except that no active filler chromium carbide is added.

[0114] Table 1 Performance data of ceramic precursor slurry

[0115]

[0116]

[0117] The ceramic precursor slurry prepared in the above embodiments has moderate viscosity, good filler dispersibility, and a long shelf life with no sedimentation within 3 months. Furthermore, it exhibits low curing and crosslinking temperatures and low ceramic sintering temperatures; the precursor can be cured below 200°C, and the cured product shows no cracking, allowing for mechanical processing and demolding. The cured and crosslinked product can decompose at 1200°C, thus reducing energy consumption, minimizing fiber damage, and improving the material's high-temperature resistance. In addition, this invention does not require the addition of sintering aids to prepare ceramic matrix composites.

[0118] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A ceramic precursor slurry suitable for winding process, characterized in that, It is composed of the following components in parts by weight: 100 parts of polysilazane resin, 10-150 parts of inert filler, 10-150 parts of active filler, 10-20 parts of thixotropic agent, and 1-5 parts of accelerator; The polysilazane resin is a liquid vinyl polysilazane resin; The molecular weight of the liquid vinyl polysilazane resin is less than 1.0 × 10⁻⁶. 3 ; The structural formula of the liquid vinyl polysilazane resin is: ， Where n = 5~10; The inert filler is one or more of the following: silica powder, silicon nitride powder, silicon carbide powder, boron nitride powder, and alumina powder. The particle size of the inert filler is 0.1~100μm; The active filler is a pure metal or an intermetallic compound, including one or more of aluminum, chromium, zirconium, chromium silicide, molybdenum silicide, and titanium silicide. The thixotropic agent is one or more of fumed silica, bentonite, and attapulgite. The accelerator is one or more of methyl ethyl ketone peroxide, benzoyl peroxide, tert-butyl peroxide, dicumyl peroxide, and chloroplatinic acid.

2. The method for preparing a ceramic precursor slurry suitable for winding process as described in claim 1, characterized in that, Includes the following steps: Take polysilazane resin and accelerator, mix them evenly, then add thixotropic agent, inert filler and active filler, and filter to obtain the target product.

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