CN113024273A - 具有二氧化硅保护膜的碳化硅颗粒捕捉器及其制备方法 - Google Patents

具有二氧化硅保护膜的碳化硅颗粒捕捉器及其制备方法 Download PDF

Info

Publication number
CN113024273A
CN113024273A CN202110268335.1A CN202110268335A CN113024273A CN 113024273 A CN113024273 A CN 113024273A CN 202110268335 A CN202110268335 A CN 202110268335A CN 113024273 A CN113024273 A CN 113024273A
Authority
CN
China
Prior art keywords
silicon
parts
powder
silicon carbide
protective film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202110268335.1A
Other languages
English (en)
Inventor
沈琴娟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
YIXING PRINCE CERAMICS CO Ltd
Original Assignee
YIXING PRINCE CERAMICS CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by YIXING PRINCE CERAMICS CO Ltd filed Critical YIXING PRINCE CERAMICS CO Ltd
Priority to CN202110268335.1A priority Critical patent/CN113024273A/zh
Publication of CN113024273A publication Critical patent/CN113024273A/zh
Priority to CN202210056481.2A priority patent/CN114249605A/zh
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
    • C04B38/063—Preparing or treating the raw materials individually or as batches
    • C04B38/0635—Compounding ingredients
    • C04B38/0645—Burnable, meltable, sublimable materials
    • C04B38/0675—Vegetable refuse; Cellulosic materials, e.g. wood chips, cork, peat, paper
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • 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
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
    • C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • 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
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • 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
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/6303—Inorganic additives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0821—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with particulate filters
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • 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
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • 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
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • 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
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3427—Silicates other than clay, e.g. water glass
    • C04B2235/3436—Alkaline earth metal silicates, e.g. barium silicate
    • C04B2235/3445—Magnesium silicates, e.g. forsterite
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • 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
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • 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
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/428—Silicon
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • 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
    • C04B2235/5427—Particle size related information expressed by the size of the particles or aggregates thereof millimeter or submillimeter sized, i.e. larger than 0,1 mm
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • 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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • 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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • 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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • 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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • 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
    • C04B2235/658—Atmosphere during thermal treatment
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • 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
    • C04B2235/658—Atmosphere during thermal treatment
    • C04B2235/6583—Oxygen containing atmosphere, e.g. with changing oxygen pressures
    • C04B2235/6584—Oxygen containing atmosphere, e.g. with changing oxygen pressures at an oxygen percentage below that of air

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Materials (AREA)
  • Ceramic Products (AREA)

Abstract

本发明公开了一种具有二氧化硅保护膜的碳化硅颗粒捕捉器，按重量份数包括70～80份的碳化硅粉末，10～20份的硅粉，5～10份的氧化硅粉末，37～55份的滑石粉，18～35份的氧化铝，5～20份的高岭土，5～10份浓度为5％～10％的硬脂酸、1～5份的甲基纤维素和1～5份的果壳粉。本发明还公开了此种硅结合碳化硅颗粒捕捉器的制备方法。采用本发明的设计，能够形成包裹了主体料的具有较高气孔率的二氧化硅保护膜，使得在保持原有的过滤性能的前提下，提高产品的强度。

Description

具有二氧化硅保护膜的碳化硅颗粒捕捉器及其制备方法
技术领域
本发明涉及一种封孔料，特别是一种具有二氧化硅保护膜的碳化硅颗粒捕捉器的制备方法。
背景技术
汽车行业工业化的发展，带来的尾气污染也日益严重。随着汽车尾气排放的控制标准越来越严格，世界各国包括中对柴油车的尾气排放也日益趋严。
现在的汽车尾气过滤器，采用交叉封孔方式的陶瓷过滤器由于其性能优越且成本较低，使用更加普遍，但是在实际封孔过程中，由于封孔料的成分配比仍存在问题，流动性差，刮板刮进通孔过程中易产生堵塞，所以堵孔完成后会发现封孔的深度参差不齐，影响产品良率。
SiC材料因具有高温强度大，抗氧化性好，，耐磨损，热稳定性好，热膨胀系数小，热导率大，硬度高等优良特性而被广泛应用于各种领域。SiC是一种共价键很强的材料，烧结时的扩散速率相当低，同时其颗粒表面往往覆盖一层相当薄的氧化层，起扩散势垒的作用。没有烧结添加剂，纯碳化硅是很难烧结的。
现有的颗粒捕捉器存在的技术难点是，当需要提高气孔率时，不可避免的，在相同材质下，就会降低其结构的稳固性能，而提高稳固性能后，气孔率又会有所降低。
发明内容
发明目的：本发明的目的在于解决现有的颗粒捕捉器无法兼顾气孔率和强度的问题。
技术方案：本发明提供以下技术方案：
一种具有二氧化硅保护膜的碳化硅颗粒捕捉器，按重量份数包括70～80份的碳化硅粉末，10～20份的硅粉，5～10份的氧化硅粉末，37～55份的滑石粉，18～35 份的氧化铝，5～20份的高岭土，5～10份浓度为5％～10％的硬脂酸、1～5份的甲基纤维素和1～5份的造孔剂。
进一步地，所述造孔剂为果壳粉。
进一步地，按照重量份数，碳化硅粉末的使用量不超过硅粉使用量的7倍。
进一步地，碳化硅粉末粒径为0～1mm，硅粉粒径不超过325目，氧化硅粉末粒径不超过450目。
一种具有二氧化硅保护膜的碳化硅颗粒捕捉器的制备方法，包括以下步骤：
1)将所有材料混合，并将主体塑造为所需的主体形态；
2)0～400℃区间，保持正常大气压，甲基纤维素和造孔剂挥发，形成气孔；
3)400～1200℃区间，对产品空间通氩气，保持大气压为0.02～0.04MPa，防止单质硅氧化；
4)1200～1300℃区间，硅粉开始液化，保持硅粉的贫氧环境；
5)1300～1500℃区间，保持氧气浓度1～5％，真空度不大于50Mpa，形成二氧化硅保护膜结构；
6)1500℃保持8小时，充分保温；
7)1500～1200℃，降温速率200℃/小时，快速冷却形成微裂纹，提高产品抗热震性能；
8)1200～室温，降温速率100℃/小时，静置冷却，使得产品成型。
进一步地，所述步骤5)中，液化后的金属硅在较少的氧气环境下，缓缓形成熔点更高的固态二氧化硅，并在氧化硅、碳化硅已经形成固定结构中重塑，形成微裂纹。
由于是多种材料混合，形成液态的金属硅会在所有的材料间流动，形成类似包裹的形态，又由于本来结合完成的形态，在金属硅形成液态后，再次产生了微裂纹式的空隙，使得在结构被补强的前提下，提高了气孔率。
进一步地，所述步骤8)中，为了降温速率恒定，可以将产品静置于温度调至为低于室温的恒温箱中。
进一步地，所述步骤1)至步骤6)，塑造后的主体设置于烧结炉中进行烧结。
有益效果：本发明相对于现有技术：采用本发明的设计，能够形成包裹了主体料的具有较高气孔率的二氧化硅保护膜，使得在保持原有的过滤性能的前提下，提高产品的强度。
具体实施方式
下面结合具体实施例，进一步阐明本发明，应理解这些实施例仅用于说明本发明而不用于限制本发明的范围，在阅读了本发明之后，本领域技术人员对本发明的各种等同形式的修改均落于本申请所附权利要求所限定的范围。
实施例1
一种具有二氧化硅保护膜的碳化硅颗粒捕捉器，按重量份数包括80份的碳化硅粉末，20份的硅粉，10份的氧化硅粉末，55份的滑石粉，35份的氧化铝， 20份的高岭土，10份浓度为5％～10％的硬脂酸、5份的甲基纤维素和5份的果壳粉。
按照重量份数，碳化硅粉末的使用量不超过硅粉使用量的7倍。
碳化硅粉末粒径为1mm，硅粉粒径不超过325目，氧化硅粉末粒径不超过450 目。
实施例2
一种具有二氧化硅保护膜的碳化硅颗粒捕捉器，按重量份数包括70份的碳化硅粉末，10份的硅粉，5份的氧化硅粉末，37份的滑石粉，18份的氧化铝，5 份的高岭土，5份浓度为5％～10％的硬脂酸、1份的甲基纤维素和1份的造孔剂。
按照重量份数，碳化硅粉末的使用量不超过硅粉使用量的7倍。
碳化硅粉末粒径为0～1mm，硅粉粒径不超过325目，氧化硅粉末粒径不超过 450目。
实施例3
一种具有二氧化硅保护膜的碳化硅颗粒捕捉器的制备方法，包括以下步骤：
1)将所有材料混合，并将主体塑造为所需的主体形态；
2)0～400℃区间，保持正常大气压，甲基纤维素和造孔剂挥发，形成气孔；
3)400～1200℃区间，对产品空间通氩气，保持大气压为0.02～0.04MPa，防止单质硅氧化；
4)1200～1300℃区间，硅粉开始液化，保持硅粉的贫氧环境；
5)1300～1500℃区间，保持氧气浓度1～5％，真空度不大于50Mpa，形成二氧化硅保护膜结构；
6)1500℃保持8小时，充分保温；
7)1500～1200℃，降温速率200℃/小时，快速冷却形成微裂纹，提高产品抗热震性能；
8)1200～室温，降温速率100℃/小时，静置冷却，使得产品成型。
步骤5)中，液化后的金属硅在较少的氧气环境下，缓缓形成熔点更高的固态二氧化硅，并在氧化硅、碳化硅已经形成固定结构中重塑，形成微裂纹。
由于是多种材料混合，形成液态的金属硅会在所有的材料间流动，形成类似包裹的形态，又由于本来结合完成的形态，在金属硅形成液态后，再次产生了微裂纹式的空隙，使得在结构被补强的前提下，提高了气孔率。
步骤8)中，为了降温速率恒定，可以将产品静置于温度调至为低于室温的恒温箱中。
步骤1)至步骤6)，塑造后的主体设置于烧结炉中进行烧结。

Claims (8)

1.一种具有二氧化硅保护膜的碳化硅颗粒捕捉器，其特征在于：按重量份数包括70～80份的碳化硅粉末，10～20份的硅粉，5～10份的氧化硅粉末，37～55份的滑石粉，18～35份的氧化铝，5～20份的高岭土，5～10份浓度为5％～10％的硬脂酸、1～5份的甲基纤维素和1～5份的造孔剂。
2.根据权利要求1所述的具有二氧化硅保护膜的碳化硅颗粒捕捉器，其特征在于：所述造孔剂为果壳粉。
3.根据权利要求1所述的具有二氧化硅保护膜的碳化硅颗粒捕捉器，其特征在于：按照重量份数，碳化硅粉末的使用量不超过硅粉使用量的7倍。
4.根据权利要求1所述的具有二氧化硅保护膜的碳化硅颗粒捕捉器，其特征在于：碳化硅粉末粒径为0～1mm，硅粉粒径不超过325目，氧化硅粉末粒径不超过450目。
5.一种如权利要求1所述的具有二氧化硅保护膜的碳化硅颗粒捕捉器的制备方法，其特征在于：包括以下步骤：
1)将所有材料混合，并将主体塑造为所需的主体形态；
2)0～400℃区间，保持正常大气压，甲基纤维素和造孔剂挥发，形成气孔；
3)400～1200℃区间，对产品空间通氩气，保持大气压为0.02～0.04MPa，防止单质硅氧化；
4)1200～1300℃区间，硅粉开始液化，保持硅粉的贫氧环境；
5)1300～1500℃区间，保持氧气浓度1～5％，真空度不大于50Mpa，形成二氧化硅保护膜结构；
6)1500℃保持8小时，充分保温；
7)1500～1200℃，降温速率200℃/小时，快速冷却形成微裂纹，提高产品抗热震性能；
8)1200～室温，降温速率100℃/小时，静置冷却，使得产品成型。
6.根据权利要求4所述的具有二氧化硅保护膜的碳化硅颗粒捕捉器的制备方法，其特征在于：所述步骤5)中，液化后的金属硅在较少的氧气环境下，缓缓形成熔点更高的二氧化硅，并在氧化硅、碳化硅已经形成固定结构中重塑，形成微裂纹。
7.根据权利要求4所述的具有二氧化硅保护膜的碳化硅颗粒捕捉器的制备方法，其特征在于：所述步骤8)中，为了降温速率恒定，可以将产品静置于温度调至为低于室温的恒温箱中。
8.根据权利要求4所述的具有二氧化硅保护膜的碳化硅颗粒捕捉器的制备方法，其特征在于：所述步骤1)至步骤6)，塑造后的主体设置于烧结炉中进行烧结。
CN202110268335.1A 2021-03-12 2021-03-12 具有二氧化硅保护膜的碳化硅颗粒捕捉器及其制备方法 Withdrawn CN113024273A (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202110268335.1A CN113024273A (zh) 2021-03-12 2021-03-12 具有二氧化硅保护膜的碳化硅颗粒捕捉器及其制备方法
CN202210056481.2A CN114249605A (zh) 2021-03-12 2022-01-18 具有二氧化硅保护膜的碳化硅颗粒捕捉器及其制备方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110268335.1A CN113024273A (zh) 2021-03-12 2021-03-12 具有二氧化硅保护膜的碳化硅颗粒捕捉器及其制备方法

Publications (1)

Publication Number Publication Date
CN113024273A true CN113024273A (zh) 2021-06-25

Family

ID=76469919

Family Applications (2)

Application Number Title Priority Date Filing Date
CN202110268335.1A Withdrawn CN113024273A (zh) 2021-03-12 2021-03-12 具有二氧化硅保护膜的碳化硅颗粒捕捉器及其制备方法
CN202210056481.2A Pending CN114249605A (zh) 2021-03-12 2022-01-18 具有二氧化硅保护膜的碳化硅颗粒捕捉器及其制备方法

Family Applications After (1)

Application Number Title Priority Date Filing Date
CN202210056481.2A Pending CN114249605A (zh) 2021-03-12 2022-01-18 具有二氧化硅保护膜的碳化硅颗粒捕捉器及其制备方法

Country Status (1)

Country Link
CN (2) CN113024273A (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113880584A (zh) * 2021-11-16 2022-01-04 宜兴王子制陶有限公司 一种改进的碳化硅蜂窝陶瓷单元体快速烧成方法
CN114249605A (zh) * 2021-03-12 2022-03-29 宜兴王子制陶有限公司 具有二氧化硅保护膜的碳化硅颗粒捕捉器及其制备方法
CN114524675A (zh) * 2022-02-22 2022-05-24 山东奥福环保科技股份有限公司 一种硅结合碳化硅质柴油颗粒过滤器及其制备方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04154665A (ja) * 1990-10-15 1992-05-27 Toshiba Corp 分散性および焼結性の優れた炭化珪素粉末およびその製造方法
CN102010222B (zh) * 2010-10-29 2013-04-17 西安交通大学 一种碳化硅多孔陶瓷及其制备方法
CN102391012B (zh) * 2011-08-02 2013-04-17 西安交通大学 结合碳热还原制备重结晶碳化硅多孔陶瓷的方法
CN103044032A (zh) * 2013-01-23 2013-04-17 宜兴王子制陶有限公司 一种耐高温的碳化硅碳烟过滤器的制造方法
CN105418086A (zh) * 2015-11-20 2016-03-23 中钢集团洛阳耐火材料研究院有限公司 一种氧化硅结合碳化硅材料
CN106365677A (zh) * 2016-08-26 2017-02-01 宜兴王子制陶有限公司 一种壁流式陶瓷过滤器的主体料
CN113024273A (zh) * 2021-03-12 2021-06-25 宜兴王子制陶有限公司 具有二氧化硅保护膜的碳化硅颗粒捕捉器及其制备方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114249605A (zh) * 2021-03-12 2022-03-29 宜兴王子制陶有限公司 具有二氧化硅保护膜的碳化硅颗粒捕捉器及其制备方法
CN113880584A (zh) * 2021-11-16 2022-01-04 宜兴王子制陶有限公司 一种改进的碳化硅蜂窝陶瓷单元体快速烧成方法
CN114524675A (zh) * 2022-02-22 2022-05-24 山东奥福环保科技股份有限公司 一种硅结合碳化硅质柴油颗粒过滤器及其制备方法

Also Published As

Publication number Publication date
CN114249605A (zh) 2022-03-29

Similar Documents

Publication Publication Date Title
CN113024273A (zh) 具有二氧化硅保护膜的碳化硅颗粒捕捉器及其制备方法
CN107285787B (zh) 一种轻量化刚玉-镁铝尖晶石耐火材料及其制备方法
US7771506B2 (en) Spongy sintered article of titanium or titanium alloy exhibiting excellent compression strength
CN101323524B (zh) 一种定向排列孔碳化硅多孔陶瓷的制备方法
EP2520349B1 (en) Filter used for filtering molten metal and preparation method thereof
US20230044409A1 (en) Fe-al-based metal porous membrane and preparation method thereof
EP3084029B1 (en) A method for producing a sintered component and a sintered component
US11918958B2 (en) Fe-Al-based metal porous membrane and preparation method thereof
CN110483023B (zh) 一种微孔化刚玉砖及其制备方法
CN110981510A (zh) 一种氮氧化硅结合碳化硅耐火砖及其制备方法
CN115466123A (zh) 一种碳化硅陶瓷晶舟的制备方法
CN104591738A (zh) 一种高韧性碳化硼陶瓷及其制备方法
CN111876625B (zh) 一种AlNMg复合材料及其制备方法
CN112725676B (zh) 一种红硬性好的高强度硬质合金的制备方法
CN103964859A (zh) 钢薄带连铸用侧封板及其制备方法
CN112341201A (zh) 一种自结合碳化硅耐火材料及其制备方法
CN110002863B (zh) 一种钇铝石榴石多孔陶瓷的制备方法
CN104311109A (zh) 发泡注模、磷酸二氢铝胶结制备泡沫陶瓷的方法
CN115745620B (zh) 一种高致密度氮化钛陶瓷材料及其制备方法
CN115161529B (zh) 一种铝基碳化硅复合材料及其制备方法和应用
CN111517798A (zh) 一种碳化物基陶瓷材料、制备方法及其应用
CN112110737B (zh) 一种高铬耐火材料及其制备方法
CN114085082A (zh) 一种碳化硅/黑滑石复合陶瓷膜支撑体及其制备方法
CN114057505B (zh) 一种多孔片状氧化铝框架的制备方法
KR100503352B1 (ko) 치밀한 탄화규소계 세라믹스의 제조방법

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication

Application publication date: 20210625

WW01 Invention patent application withdrawn after publication