CN106376107A - 大功率氮化硅陶瓷加热片及其内软外硬的制作方法 - Google Patents

大功率氮化硅陶瓷加热片及其内软外硬的制作方法 Download PDF

Info

Publication number
CN106376107A
CN106376107A CN201611042278.0A CN201611042278A CN106376107A CN 106376107 A CN106376107 A CN 106376107A CN 201611042278 A CN201611042278 A CN 201611042278A CN 106376107 A CN106376107 A CN 106376107A
Authority
CN
China
Prior art keywords
silicon nitride
ceramics
ceramic
heating plate
heating
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.)
Granted
Application number
CN201611042278.0A
Other languages
English (en)
Other versions
CN106376107B (zh
Inventor
肖毅
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.)
Changde Cree New Mstar Technology Ltd
Original Assignee
Changde Cree New Mstar Technology 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 Changde Cree New Mstar Technology Ltd filed Critical Changde Cree New Mstar Technology Ltd
Priority to CN201611042278.0A priority Critical patent/CN106376107B/zh
Publication of CN106376107A publication Critical patent/CN106376107A/zh
Application granted granted Critical
Publication of CN106376107B publication Critical patent/CN106376107B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00Ohmic-resistance heating
    • H05B3/10Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/12Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
    • H05B3/14Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
    • H05B3/141Conductive ceramics, e.g. metal oxides, metal carbides, barium titanate, ferrites, zirconia, vitrous compounds
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515Shaped 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
    • C04B35/56Shaped 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
    • C04B35/5607Shaped 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 refractory metal carbides
    • C04B35/5611Shaped 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 refractory metal carbides based on titanium carbides
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515Shaped 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
    • C04B35/58Shaped 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 borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
    • C04B35/584Shaped 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 borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/71Ceramic products containing macroscopic reinforcing agents
    • C04B35/78Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
    • C04B35/80Fibres, filaments, whiskers, platelets, or the like
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00Ohmic-resistance heating
    • H05B3/20Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/22Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
    • H05B3/26Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base
    • H05B3/265Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base the insulating base being an inorganic material, e.g. ceramic
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3206Magnesium oxides or oxide-forming salts thereof
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3224Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3224Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • C04B2235/3227Lanthanum oxide or oxide-forming salts thereof
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3231Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3418Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38Non-oxide ceramic constituents or additives
    • C04B2235/3817Carbides
    • C04B2235/3826Silicon carbides
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38Non-oxide ceramic constituents or additives
    • C04B2235/3817Carbides
    • C04B2235/3839Refractory metal carbides
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38Non-oxide ceramic constituents or additives
    • C04B2235/3817Carbides
    • C04B2235/3839Refractory metal carbides
    • C04B2235/3843Titanium carbides
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38Non-oxide ceramic constituents or additives
    • C04B2235/3852Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
    • C04B2235/3865Aluminium nitrides
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38Non-oxide ceramic constituents or additives
    • C04B2235/3852Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
    • C04B2235/3873Silicon nitrides, e.g. silicon carbonitride, silicon oxynitride
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38Non-oxide ceramic constituents or additives
    • C04B2235/3852Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
    • C04B2235/3886Refractory metal nitrides, e.g. vanadium nitride, tungsten nitride
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38Non-oxide ceramic constituents or additives
    • C04B2235/3891Silicides, e.g. molybdenum disilicide, iron silicide
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/40Metallic constituents or additives not added as binding phase
    • C04B2235/404Refractory metals
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/40Metallic constituents or additives not added as binding phase
    • C04B2235/405Iron group metals

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Ceramic Products (AREA)

Abstract

大功率氮化硅陶瓷加热片及其內软外硬的制作方法,包括绝缘陶瓷板、加热陶瓷、焊接陶瓷和外接导线,其制作方法,步骤如下:一、将绝缘陶瓷材料进行球磨、干燥、混加粘接剂、烘干、过筛;二、将绝缘陶瓷材料用冷压成形、烘干、烧结、切割成形;三、将加热陶瓷粉和焊接陶瓷粉分别加入粘接剂拌匀、烘干、造粒,成型,放入绝缘陶瓷坯体中,整体压合为一体;四、整体硬化脱胶;五、烧结、加硬并成型。本发明的优点是:1、可快速加热,温度控制精确。2、发热非常均匀,热损耗非常低。3、三种陶瓷相互均匀的固溶烧结为一体,质量高,降低了出现问题的概率。4、焊接非常牢固。

Description

大功率氮化硅陶瓷加热片及其内软外硬的制作方法
技术领域
本发明涉及氮化硅陶瓷,即大功率氮化硅陶瓷加热片及其内软外硬的制作方法。
背景技术
大功率氮化硅陶瓷加热片,一般是指500W以上的,单位面积功率大于50瓦/cm2
由于重量轻、体积小、加热速度快、功率大、热耗小、传热递效率高、高温时稳定不变形等特点在各行各业、尤其是电子行业中使用的越来越多,越来越广泛。
目前国内制作氮化硅陶瓷加热片有如下2种工艺方法:
方法一:把钨丝弯成弹簧状,按不同需要的电阻,将不同长度的弹簧放置在氮化硅材料中,压实、烧结,再焊接引出线。如图1所示。
方法二:准备流延好的氮化硅平板陶瓷坯体和钨浆,将钨浆用丝网印刷的方式印刷到氮化硅平板坯体上形成发热的导体,然后再复上一层陶瓷坯体,烧结而成。如图2所示。
方法三:专利号为2012100471693的《氮化硅加热片及其制作方法》,采用把Si3N4粉与加热体粉进行套压成一体然后进行烧结的方法。
这三种工艺方法都有比较严重的缺点:
1:在陶瓷上制作加热片,主要是利用陶瓷在比较小的面积上制作较大功率的且热损耗小的器件,但是使用的加热钨丝直径一般都很小,在Φ0.4-0.5mm左右,这种细钨丝与陶瓷粉烧结在一起不能很好的相溶,非常易损坏。
2:陶瓷烧结是多晶体,不可能没有微气孔,这在高倍显微镜下可看到,而钨丝在空气中加热是非常容易变脆烧断,这是陶瓷加热片易损坏的主要原因。
3:陶瓷粉体的颗粒形状是不同的,把直径0.4mm左右的细钨丝在高温高压下与陶瓷颗粒烧结在一起,钨丝表面已经严重的损坏了,在长期的重复使用中非常容易断丝。
4.在陶瓷流延基板上制作的加热片,由于有脱胶工艺,是不能制作大功率的产品,陶瓷一般为氧化铝材料,氧化铝材料热震性较差,只能做小功率的。
5:由于钨丝是绕成不同导程的弹簧状发热体置入陶瓷粉料中,弹簧导程尺寸不可能控制非常精准,造成加热不均匀。
6:把钨丝弹簧加到陶瓷粉中,工艺比较复杂,人为因素较大,实际功率变化比较大,不易控制。
7:钨丝置入在陶瓷中,出线端面积很小,焊接引出线非常不易,焊接不牢是使用过程中出现问题的主要原因。
8:由于加热钨丝在陶瓷体中,有不确定性,在使用中电阻变化大,功率不稳定,发热变化很大。
9.专利申请2012100471693《氮化硅加热片及其制造方法》中,有两个大的缺点,一是本体和加热体的组分配置不合理;二是在套压成型时,本体、加热体中发热区和不发热区的粉料坯都被压碎,面积和长度不易控制,产品中发热区和不发热区的长度,面积不准确,这两个缺点都导致电阻不准确,功率也不准确,不能进行批量生产。
发明内容
为了克服上述三种方法中钨丝易损坏、加热不均匀、不易焊接引出线、功率不稳定等缺点,本发明提出了一种新的大功率氮化硅陶瓷加热片及其内软外硬的制作方法。
这种大功率氮化硅陶瓷加热片,以氮化硅为主要原材料,其特征在于,包括绝缘陶瓷板、加热陶瓷、焊接陶瓷和外接导线,在绝缘陶瓷板的中心面上,烧结有U形布置的导电陶瓷,导电陶瓷的两端与焊接陶瓷相连,焊接陶瓷有一面露出在绝缘陶瓷板上,为焊接面,在焊接面上焊接有外接导线。下面对这几部分分别介绍如下:
1、加热陶瓷,由导电的金属粉末和不导电的非金属粉末混合而成,通过调节金属粉末与非金属粉末的比例达到调节电阻的作用,通电加热,达到设计的发热功率。
2、绝缘陶瓷板,是热容量大的绝缘复合陶瓷,强度高、耐热冲击、热稳定性高。
3、焊接陶瓷,把电能迅速传导至加热陶瓷,而本身不发热从而保护了出线端温度不高,安全接线。
4、外接导线,将金属线焊接在焊接陶瓷的露出面上,确保出线牢固、可靠。
这种大功率氮化硅陶瓷加热片,其陶瓷加热体由三部分不同比例的陶瓷材料组成,按重量比例如下:
1、绝缘陶瓷材料:氮化硅Si3N4,91.5-94%; 氧化镱Y2O3 ,1-3%;氧化铝Al2O3 ,0.5-1.5%;氧化镁MgO,0.2-0.5%;三氧化二镧La2O3,0.5-1%;氧化铪HfO2,0.2-0.5%,氮化铝AlN,0.5-2%,全部组分重量为100%。
2、加热陶瓷材料: 氮化硅Si3N4,40-50%,碳化钛和氮化钛的固溶体,Ti(C、N),26-35%;固溶体中碳化钛和氮化钛的重量比为4:6;钼粉Mo,0.5-3%;纳米镍Ni,0.5-1.0%;碳化铌CHNb,0.2%;晶须碳化硅SiC,0.2-0.5%;硅化钼MoSi2 ,0.1-0.2%;氧化硅SiO2 ,0.1-0.2%;氧化铝Al2O3,5-10%,全部组分重量为100%。
3、焊接陶瓷材料:碳化钛TiC,60-72%;氮化硅Si3N4 ,20-30%;晶须碳化硅SiC,0.2-0.5%;硅化钼MoSi2,0.1-0.2%;氧化铝Al2O3 ,5-10%; 氧化硅SiO2,0.1-0.2%,全部组分重量为100%。
这种大功率氮化硅陶瓷加热片内软外硬的制作方法,其特征在于,步骤如下:
一、绝缘陶瓷材料分别用尼龙罐、氮化硅Si3N4球进行球磨,磨后进行72小时干燥,使含水量小于1%,使用无污染搅拌机混料,混料时加粘接剂聚乙二醇PEG,其重量占绝缘陶瓷材料重量的1-1.5%,烘干、过筛60目,备用;
二、使用根据客户零件要求制作的专用模具,使绝缘陶瓷材料用冷等静压CIP成形,做出绝缘粉陶瓷坯体后烘干,放入气压烧结炉GPS烧结后,激光切割机切割CNC加工成所需形状,备用;
三、在加热陶瓷粉和焊接陶瓷粉中分别加入各自重量1-1.5%的聚乙二醇PEG粘接剂拌匀、烘干、造粒,用冷等静压CIP成形压成片状,分别使用专用模具成型,然后放入绝缘陶瓷坯体中,整体压合为一体;
四、整体硬化脱胶;
五、放入热等静压烧结炉HIP炉烧结,加强、加硬并成型,最高烧结温度1800℃-1820℃,压力:1500Mpa。
这种复合加工成形法俗称为:内软外硬工艺。
这种大功率氮化硅陶瓷加热片的优点是:
1、整体密度在3.4-3.6g/cm3,其中加热陶瓷密度<5 g/cm3,绝缘陶瓷密度<3.25 g/cm3,陶瓷加热片的的密度较低,有较低的热容量,可快速加热,达到1000ºC需用时间低于10秒,温度控制精确,为自控温度提供了良好条件。
2、加热陶瓷烧结为多晶体结构,发热非常均匀,热损耗非常低。
3、加热陶瓷与绝缘陶瓷、焊接陶瓷相互均匀的固溶烧结为一体,无界面,大大提高了加热片的质量,降低了出现问题的概率。
4、由于焊接陶瓷出线焊接端为矩形,焊接面较大,一般尺寸为3X1.5mm,故焊接出线非常牢固。
5、电加热体是向外发出红外长波辐射传热,本发明的发热陶瓷辐射系数大于0.9。而钨丝辐射系数仅为0.04,明显辐射热量要小。
6、烧结时绝缘陶瓷、发热陶瓷、焊接陶瓷界面清楚,但又能适当的相互侵润,电阻稳定且准确。
附图说明
图1是传统陶瓷发热片一的结构图
图2是传统陶瓷发热片二的结构图
图3是本发明的陶瓷发热片的结构图
在图1中:1、氮化硅陶瓷,2、钨丝弹簧,3、钨丝,4、焊接陶瓷,5、外接导线;
在图2中:1、钨浆料,2、陶瓷胚体;
在图3中:1、绝缘陶瓷,2、导电陶瓷,3、焊接陶瓷,4、焊接面,5、外接导线。
具体实施方式
下面通过具体实施方式对本发明详细说明如下:
这种大功率氮化硅陶瓷加热片,如图3所示。现例举实验室制造的三个产品说明。其陶瓷加热体由三部分不同比例的陶瓷材料组成,按重量比例如下:
实施例一,点烟器,规格90X5X4mm,500瓦,1100℃,10秒钟加工到1100℃。
1、绝缘陶瓷材料:氮化硅Si3N4,94%; 氧化镱Y2O3 ,1-3%;氧化铝Al2O3 ,0.5-1.5%;氧化镁MgO,0.2-0.5%;三氧化二镧La2O3,0.5-1%;氧化铪HfO2,0.2-0.5%,氮化铝AlN,0.5-2%,全部组分重量为100%。
2、加热陶瓷材料: 氮化硅Si3N4,45%,碳化钛和氮化钛的固溶体,Ti(C、N),26-35%;固溶体中碳化钛和氮化钛的重量比为4:6;钼粉Mo,0.5-3%;纳米镍Ni,0.5-1.0%;碳化铌CHNb,0.2%;晶须碳化硅SiC,0.2-0.5%;硅化钼MoSi2 ,0.1-0.2%;氧化硅SiO2 ,0.1-0.2%;氧化铝Al2O3,5-10%,全部组分重量为100%。
3、焊接陶瓷材料:碳化钛TiC,60%;氮化硅Si3N4 ,20-30%;晶须碳化硅SiC,0.2-0.5%;硅化钼MoSi2,0.1-0.2%;氧化铝Al2O3 ,5-10%; 氧化硅SiO2,0.1-0.2%,全部组分重量为100%。
这种大功率氮化硅陶瓷加热片内软外硬的制作方法,步骤如下:
一、绝缘陶瓷材料分别用尼龙罐、氮化硅Si3N4球进行球磨,磨后进行72小时干燥,使含水量小于1%,使用无污染搅拌机混料,混料时加粘接剂聚乙二醇PEG ,其重量占绝缘陶瓷材料重量的1-1.5%,烘干、过筛60目,备用;
二、使用根据客户零件要求制作的专用模具,使绝缘陶瓷材料用冷等静压CIP成形,做出绝缘粉陶瓷坯体后烘干,放入气压烧结炉GPS烧结后,激光切割机切割CNC加工成所需形状,备用;
三、在加热陶瓷粉和焊接陶瓷粉中分别加入各自重量1-1.5%的聚乙二醇PEG粘接剂拌匀、烘干、造粒,用冷等静压CIP成形压成片状,分别使用专用模具成型,然后放入绝缘陶瓷坯体中,整体压合为一体;
四、整体硬化脱胶;
五、放入热等静压烧结炉HIP炉烧结,加强、加硬并成型,最高烧结温度1800℃-1820℃,压力:1500Mpa。
实施例二,干燥片,规格1200X12X4mm,600瓦,2秒钟加工到258℃,耐用度2年。三种陶瓷材料的重量比例中,
1、绝缘陶瓷材料:氮化硅Si3N4,92%; 氧化镱Y2O3 ,1-3%;氧化铝Al2O3 ,0.5-1.5%;氧化镁MgO,0.2-0.5%;三氧化二镧La2O3,0.5-1%;氧化铪HfO2,0.2-0.5%,氮化铝AlN,0.5-2%。
2、加热陶瓷材料: 氮化硅Si3N4,45%,碳化钛和氮化钛的固溶体,Ti(C、N),26-35%;固溶体中碳化钛和氮化钛的重量比为4:6;钼粉Mo,0.5-3%;纳米镍Ni,0.5-1.0%;碳化铌CHNb,0.2%;晶须碳化硅SiC,0.2-0.5%;硅化钼MoSi2 ,0.1-0.2%;氧化硅SiO2 ,0.1-0.2%;氧化铝Al2O3,5-10%。
3、焊接陶瓷材料:碳化钛TiC,66%;氮化硅Si3N4 ,20-30%;晶须碳化硅SiC,0.2-0.5%;硅化钼MoSi2,0.1-0.2%;氧化铝Al2O3 ,5-10%; 氧化硅SiO2,0.1-0.2%。
其余的工艺条件和实施例1相同。
实施例三,加热片,规格150X25X4mm,800瓦,10秒加热到1000℃。
三种陶瓷材料的重量比例中,
1、绝缘陶瓷材料:氮化硅Si3N4,90%; 氧化镱Y2O3 ,1-3%;氧化铝Al2O3 ,0.5-1.5%;氧化镁MgO,0.2-0.5%;三氧化二镧La2O3,0.5-1%;氧化铪HfO2,0.2-0.5%,氮化铝AlN,0.5-2%。
2、加热陶瓷材料: 氮化硅Si3N4,45%,碳化钛和氮化钛的固溶体,Ti(C、N),26-35%;固溶体中碳化钛和氮化钛的重量比为4:6;钼粉Mo,0.5-3%;纳米镍Ni,0.5-1.0%;碳化铌CHNb,0.2%;晶须碳化硅SiC,0.2-0.5%;硅化钼MoSi2 ,0.1-0.2%;氧化硅SiO2 ,0.1-0.2%;氧化铝Al2O3,5-10%。
3、焊接陶瓷材料:碳化钛TiC,72%;氮化硅Si3N4 ,20-30%;晶须碳化硅SiC,0.2-0.5%;硅化钼MoSi2,0.1-0.2%;氧化铝Al2O3 ,5-10%; 氧化硅SiO2,0.1-0.2%。
其余的工艺条件和实施例1相同。

Claims (9)

1.大功率氮化硅陶瓷加热片,以氮化硅为主要原材料,其特征在于,包括绝缘陶瓷板、加热陶瓷、焊接陶瓷和外接导线,在绝缘陶瓷板的中心面上,烧结有U形布置的导电陶瓷,导电陶瓷的两端与焊接陶瓷相连,焊接陶瓷有一面露出在绝缘陶瓷板上,为焊接面,在焊接面上焊接有外接导线。
2.根据权利要求1所述的大功率氮化硅陶瓷加热片,其特征在于,加热陶瓷,由导电的金属粉末和不导电的非金属粉末混合而成,通过调节金属粉末与非金属粉末的比例达到调节电阻的作用,通电加热,达到设计的发热功率。
3.根据权利要求1所述的大功率氮化硅陶瓷加热片,其特征在于,绝缘陶瓷板,是热容量大的绝缘复合陶瓷,强度高、耐热冲击、热稳定性高。
4.根据权利要求1所述的大功率氮化硅陶瓷加热片,其特征在于,焊接陶瓷,把电能迅速传导至加热陶瓷,而本身不发热从而保护了出线端温度不高,安全接线。
5.根据权利要求1所述的大功率氮化硅陶瓷加热片,其特征在于,外接导线,将金属线焊接在焊接陶瓷的露出面上,确保出线牢固、可靠。
6.根据权利要求1所述的大功率氮化硅陶瓷加热片,其特征在于,绝缘陶瓷材料按重量比例如下:氮化硅Si3N4,91.5-94%; 氧化镱Y2O3 ,1-3%;氧化铝Al2O3 ,0.5-1.5%;氧化镁MgO,0.2-0.5%;三氧化二镧La2O3,0.5-1%;氧化铪HfO2,0.2-0.5%,氮化铝AlN,0.5-2%,全部组分重量为100%。
7.根据权利要求1所述的大功率氮化硅陶瓷加热片,其特征在于,加热陶瓷材料按重量比例如下: 氮化硅Si3N4,40-50%,碳化钛和氮化钛的固溶体,Ti(C、N),26-35%;固溶体中碳化钛和氮化钛的重量比为4:6;钼粉Mo,0.5-3%;纳米镍Ni,0.5-1.0%;碳化铌CHNb,0.2%;晶须碳化硅SiC,0.2-0.5%;硅化钼MoSi2 ,0.1-0.2%;氧化硅SiO2 ,0.1-0.2%;氧化铝Al2O3,5-10%,全部组分重量为100%。
8.根据权利要求1所述的大功率氮化硅陶瓷加热片,其特征在于,焊接陶瓷材料按重量比例如下:碳化钛TiC,60-72%;氮化硅Si3N4 ,20-30%;晶须碳化硅SiC,0.2-0.5%;硅化钼MoSi2,0.1-0.2%;氧化铝Al2O3 ,5-10%; 氧化硅SiO2,0.1-0.2%,全部组分重量为100%。
9.大功率氮化硅陶瓷加热片内软外硬的制作方法,其特征在于,步骤如下:
一、绝缘陶瓷材料分别用尼龙罐、氮化硅Si3N4球进行球磨,磨后进行72小时干燥,使含水量小于1%,使用无污染搅拌机混料,混料时加粘接剂聚乙二醇PEG ,其重量占绝缘陶瓷材料重量的1-1.5%,烘干、过筛60目,备用;
二、使用根据客户零件要求制作的专用模具,使绝缘陶瓷材料用冷等静压CIP成形,做出绝缘粉陶瓷坯体后烘干,放入气压烧结炉GPS烧结后,激光切割机切割CNC加工成所需形状,备用;
三、在加热陶瓷粉和焊接陶瓷粉中分别加入各自重量1-1.5%的聚乙二醇PEG粘接剂拌匀、烘干、造粒,用冷等静压CIP成形压成片状,分别使用专用模具成型,然后放入绝缘陶瓷坯体中,整体压合为一体;
四、整体硬化脱胶;
五、放入热等静压烧结炉HIP炉烧结,加强、加硬并成型,最高烧结温度1800℃-1820℃,压力:1500Mpa;这种复合加工成形法俗称为:内软外硬工艺。
CN201611042278.0A 2016-11-24 2016-11-24 大功率氮化硅陶瓷加热片及其内软外硬的制作方法 Active CN106376107B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611042278.0A CN106376107B (zh) 2016-11-24 2016-11-24 大功率氮化硅陶瓷加热片及其内软外硬的制作方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611042278.0A CN106376107B (zh) 2016-11-24 2016-11-24 大功率氮化硅陶瓷加热片及其内软外硬的制作方法

Publications (2)

Publication Number Publication Date
CN106376107A true CN106376107A (zh) 2017-02-01
CN106376107B CN106376107B (zh) 2020-03-20

Family

ID=57892063

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201611042278.0A Active CN106376107B (zh) 2016-11-24 2016-11-24 大功率氮化硅陶瓷加热片及其内软外硬的制作方法

Country Status (1)

Country Link
CN (1) CN106376107B (zh)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109922551A (zh) * 2019-03-21 2019-06-21 泰州瑞侃电热电器有限公司 一种ptc陶瓷自动控温电伴热带及其使用方法
CN111246601A (zh) * 2018-11-29 2020-06-05 湖北中烟工业有限责任公司 一种新型陶瓷发热体的组合物及其发热体制备和应用
WO2021057507A1 (zh) * 2019-09-25 2021-04-01 重庆利迈陶瓷技术有限公司 一种两层结构的陶瓷电热体及电烙铁
CN113179559A (zh) * 2020-12-01 2021-07-27 深圳市卓力能技术有限公司 一种发热体及其制备方法、发热组件及气溶胶发生装置
CN115124353A (zh) * 2022-07-15 2022-09-30 中材高新氮化物陶瓷有限公司 一种层状复合陶瓷圆柱滚子及其制备方法
CN115246741A (zh) * 2022-08-30 2022-10-28 辽宁伊菲科技股份有限公司 一种传热速度快高绝缘的氮化硅陶瓷电极及制备方法
CN115536402A (zh) * 2022-09-26 2022-12-30 中国科学院上海硅酸盐研究所 一种氮化硅/钨高温共烧陶瓷基板的制备方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1229829A (zh) * 1999-03-15 1999-09-29 广州石潮高性能陶瓷总公司 氮化硅发热体及其制造方法
CN102595665A (zh) * 2012-02-28 2012-07-18 威海兴泰金属制造有限公司 氮化硅加热片及其制造方法
EP2608629A2 (en) * 2011-12-21 2013-06-26 NGK Spark Plug Co., Ltd. Ceramic heater and manufacturing method therefor, and heating apparatus
CN104145528A (zh) * 2012-02-29 2014-11-12 京瓷株式会社 加热器以及具备该加热器的电热塞
CN104860683A (zh) * 2014-02-26 2015-08-26 东莞市国研电热材料有限公司 一种一体成型的陶瓷加热体及其制备工艺
CN104860681A (zh) * 2014-02-26 2015-08-26 东莞市国研电热材料有限公司 一种叠层式陶瓷加热体及其制备工艺

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1229829A (zh) * 1999-03-15 1999-09-29 广州石潮高性能陶瓷总公司 氮化硅发热体及其制造方法
EP2608629A2 (en) * 2011-12-21 2013-06-26 NGK Spark Plug Co., Ltd. Ceramic heater and manufacturing method therefor, and heating apparatus
CN102595665A (zh) * 2012-02-28 2012-07-18 威海兴泰金属制造有限公司 氮化硅加热片及其制造方法
CN104145528A (zh) * 2012-02-29 2014-11-12 京瓷株式会社 加热器以及具备该加热器的电热塞
CN104860683A (zh) * 2014-02-26 2015-08-26 东莞市国研电热材料有限公司 一种一体成型的陶瓷加热体及其制备工艺
CN104860681A (zh) * 2014-02-26 2015-08-26 东莞市国研电热材料有限公司 一种叠层式陶瓷加热体及其制备工艺

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111246601A (zh) * 2018-11-29 2020-06-05 湖北中烟工业有限责任公司 一种新型陶瓷发热体的组合物及其发热体制备和应用
CN109922551A (zh) * 2019-03-21 2019-06-21 泰州瑞侃电热电器有限公司 一种ptc陶瓷自动控温电伴热带及其使用方法
WO2021057507A1 (zh) * 2019-09-25 2021-04-01 重庆利迈陶瓷技术有限公司 一种两层结构的陶瓷电热体及电烙铁
JP2022550289A (ja) * 2019-09-25 2022-12-01 チョンチン リ-マーク テクノロジー カンパニー リミテッド 2層構造を有するセラミック電気発熱体および電気はんだごて
JP7369863B2 (ja) 2019-09-25 2023-10-26 チョンチン リ-マーク テクノロジー カンパニー リミテッド 2層構造を有するセラミック電気発熱体および電気はんだごて
CN113179559A (zh) * 2020-12-01 2021-07-27 深圳市卓力能技术有限公司 一种发热体及其制备方法、发热组件及气溶胶发生装置
CN115124353A (zh) * 2022-07-15 2022-09-30 中材高新氮化物陶瓷有限公司 一种层状复合陶瓷圆柱滚子及其制备方法
CN115124353B (zh) * 2022-07-15 2023-01-24 中材高新氮化物陶瓷有限公司 一种层状复合陶瓷圆柱滚子及其制备方法
CN115246741A (zh) * 2022-08-30 2022-10-28 辽宁伊菲科技股份有限公司 一种传热速度快高绝缘的氮化硅陶瓷电极及制备方法
CN115536402A (zh) * 2022-09-26 2022-12-30 中国科学院上海硅酸盐研究所 一种氮化硅/钨高温共烧陶瓷基板的制备方法

Also Published As

Publication number Publication date
CN106376107B (zh) 2020-03-20

Similar Documents

Publication Publication Date Title
CN106376107A (zh) 大功率氮化硅陶瓷加热片及其内软外硬的制作方法
CN107046739B (zh) 大功率氮化硅陶瓷加热片及其内硬外软的制作方法
EP2343949B1 (en) Ceramic heater
US4912305A (en) Silicon nitride base ceramic heater element and method of producing same
KR101470046B1 (ko) 세라믹스 히터 및 그 제조 방법
CN101913879B (zh) 氮化硅材料及其制备方法和氮化硅发热器件及其制备方法
CN105948723A (zh) 一种氧化铝微波介质陶瓷及其制备方法
JP3618640B2 (ja) 半導体製造・検査装置用ホットプレート
CN102625504A (zh) 高温硼化锆陶瓷发热体及其制备方法
JP3433063B2 (ja) 窒化アルミニウム焼結体、電子機能材料および静電チャック
JP4571728B2 (ja) 窒化珪素焼結体及びその製造方法
US7282669B2 (en) Ceramic heater and method for manufacturing the same
CN112573926A (zh) 氮化铝导体材料及氮化铝全陶瓷加热结构器件
CN102595665A (zh) 氮化硅加热片及其制造方法
CN106392082A (zh) 氧化钇‑钨梯度材料及其制备方法和在制造稀土熔炼用坩埚中的应用
JP4018998B2 (ja) セラミックヒータおよびグロープラグ
CN105931935A (zh) 一种高导热绝缘介质快热阴极热丝组件及制备方法
JPH0465360A (ja) 導電性セラミックス焼結体及びその製造方法
CN106270532A (zh) 氧化钇‑钨梯度材料及其制备方法和在制造合金熔炼用坩埚中的应用
JP4803651B2 (ja) セラミックヒータの製造方法およびグロープラグの製造方法
JP3716045B2 (ja) セラミックヒータ
JP2001319967A (ja) セラミック基板の製造方法
JP3568194B2 (ja) 半導体熱処理用セラミックヒーター
JP3611345B2 (ja) セラミック及びその用途
CN107540377A (zh) 一种碳化硅基复相陶瓷材料在高温电阻元件中的应用

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant