CN106278264A - 一种高密度铬酸镧陶瓷发热体制造方法 - Google Patents
一种高密度铬酸镧陶瓷发热体制造方法 Download PDFInfo
- Publication number
- CN106278264A CN106278264A CN201610612065.0A CN201610612065A CN106278264A CN 106278264 A CN106278264 A CN 106278264A CN 201610612065 A CN201610612065 A CN 201610612065A CN 106278264 A CN106278264 A CN 106278264A
- Authority
- CN
- China
- Prior art keywords
- lanthanum ceramics
- chromic lanthanum
- chromic
- heater
- hot
- 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.)
- Pending
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 43
- 229910052746 lanthanum Inorganic materials 0.000 title claims abstract description 36
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 16
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000005245 sintering Methods 0.000 claims abstract description 9
- 238000007731 hot pressing Methods 0.000 claims abstract description 7
- 229910052786 argon Inorganic materials 0.000 claims abstract description 6
- 238000009413 insulation Methods 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims abstract description 4
- 230000008520 organization Effects 0.000 abstract description 3
- WGLPBDUCMAPZCE-UHFFFAOYSA-N chromium trioxide Inorganic materials O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- NFYLSJDPENHSBT-UHFFFAOYSA-N chromium(3+);lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Cr+3].[La+3] NFYLSJDPENHSBT-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000000462 isostatic pressing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/50—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on rare-earth compounds
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heating 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
- H05B3/14—Heating 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
- H05B3/141—Conductive ceramics, e.g. metal oxides, metal carbides, barium titanate, ferrites, zirconia, vitrous compounds
-
- 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
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
-
- 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
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3241—Chromium oxides, chromates, or oxide-forming salts thereof
- C04B2235/3243—Chromates or chromites, e.g. aluminum chromate, lanthanum strontium chromite
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
本发明涉及一种高密度铬酸镧陶瓷发热体制造方法，其特征是：包括以下步骤：（1）制备铬酸镧陶瓷粉料，铬酸镧陶瓷粉料的粒度范围为1‑100μm；（2）将制备好的铬酸镧陶瓷粉料装入模具中，放入热压烧结炉在真空或氩气保护环境下热压成型铬酸镧陶瓷发热体，其中：热压温度为1600‑1850℃、成型压力为25‑35Mpa、保温保压0.5‑3小时。其优点是：所制造的陶瓷相对密度高、组织内部无孔隙；发热体外观质量好，无裂纹和隐裂等宏观缺陷，表面光滑无麻点；产品强度高，成品率高。
Description
技术领域
本发明涉及一种高密度铬酸镧陶瓷发热体制造方法，属于电致热发热材料领域。
背景技术
铬酸镧（La1-xMxCrO3，其中M包括Mg、Ca、Sr、Ba中的一种或几种碱土元素）属钙钛矿型复合氧化物，材料的电阻率随着二价碱土元素M掺杂量的增加而减少。将铬酸镧陶瓷材料用作发热体具有耐高温、抗氧化、不易腐蚀老化、使用温度高（最高可达1800℃）等诸多优点。当前铬酸镧陶瓷发热体制作流程为预先通过模压成型或等静压成型或挤出成型工艺制备铬酸镧毛坯，然后经高温烧结得到陶瓷发热体。通过现有技术制作的铬酸镧陶瓷发热体，相对密度大约为80%左右，组织致密性差；发热体外观粗糙，表面甚至会出现裂纹和麻点等宏观缺陷，导致发热体强度偏低，成品率不高，极大地限制了它的广泛应用。
发明内容
本发明的目的是针对背景技术存在的问题，提供一种高密度铬酸镧陶瓷发热体制造方法。该方法采用热压烧结技术制备铬酸镧陶瓷发热体，实现成型和烧结同步进行，可以保证粉料颗粒紧密接触，加速致密化进程；所制造的陶瓷相对密度高、组织内部无孔隙；发热体外观质量好，外部无裂纹，表面无麻点，产品强度高。
本发明的方法包括以下步骤：
（1）制备铬酸镧陶瓷粉料，铬酸镧陶瓷粉料的粒度范围为1-100μm；
（2）将制备好的铬酸镧陶瓷粉料装入模具中，放入热压烧结炉在真空或氩气保护环境下热压成型铬酸镧陶瓷发热体，其中：热压温度为1600-1850℃、成型压力为25-35Mpa、保温保压0.5-3小时。
本发明与背景技术相比，具有的有益效果是：所制造的陶瓷相对密度高、组织内部无孔隙；发热体外观质量好，无裂纹和隐裂等宏观缺陷，表面光滑无麻点；产品强度高，成品率高。
附图说明
图1是实施例1中，所制备的铬酸镧陶瓷发热体X射线衍射图谱；
图2是实施例1中，所制备的铬酸镧陶瓷发热体微观组织照片。
具体实施方式
实施例1：
一种高密度铬酸镧陶瓷发热体制造方法，具体包括以下步骤：
（1）制备La0.8Ca0.2CrO3铬酸镧陶瓷粉料；
（2）将制备好的La0.8Ca0.2CrO3陶瓷粉料装入石墨模具，放入热压烧结炉在真空或氩气保护环境下热压成型铬酸镧陶瓷发热体，热压温度为1600℃，成型压力为35MPa，保温保压3小时。
经上述工艺可以获得高纯铬酸镧陶瓷，X射线衍射图谱见附图1。发热体外观质量好，无裂纹和隐裂等宏观缺陷，表面光滑无麻点；相对密度98.5%，组织致密，内部无孔隙，其微观组织照片见附图2。
实施例2：
一种高密度铬酸镧陶瓷发热体制造方法，具体包括以下步骤：
（1）制备La0.98Ca0.02CrO3铬酸镧陶瓷粉料；
（2）将制备好的La0.98Ca0.02CrO3陶瓷粉料装入石墨模具，放入热压烧结炉在真空或氩气保护环境下热压成型铬酸镧陶瓷发热体，热压温度为1700℃，成型压力为30MPa，保温保压2小时。
经上述工艺可以获得高纯铬酸镧陶瓷。发热体外观质量好，无裂纹和隐裂等宏观缺陷，表面光滑无麻点；相对密度98.8%，组织致密，内部无孔隙。
实施例3：
一种高密度铬酸镧陶瓷发热体制造方法，具体包括以下步骤：
（1）制备La0.92Ca0.08CrO3铬酸镧陶瓷粉料；
（2）将制备好的La0.92Ca0.08CrO3陶瓷粉料装入石墨模具，放入热压烧结炉在真空或氩气保护环境下热压成型铬酸镧陶瓷发热体，热压温度为1850℃，成型压力为25MPa，保温保压0.5小时。
经上述工艺可以获得高纯铬酸镧陶瓷。发热体外观质量好，无裂纹和隐裂等宏观缺陷，表面光滑无麻点；相对密度99.2%，组织致密，内部无孔隙。
Claims (1)
1.一种高密度铬酸镧陶瓷发热体制造方法，其特征是：包括以下步骤：
（1）制备铬酸镧陶瓷粉料，铬酸镧陶瓷粉料的粒度范围为1-100μm；
（2）将制备好的铬酸镧陶瓷粉料装入模具中，放入热压烧结炉在真空或氩气保护环境下热压成型铬酸镧陶瓷发热体，其中：热压温度为1600-1850℃、成型压力为25-35Mpa、保温保压0.5-3小时。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610612065.0A CN106278264A (zh) | 2016-07-31 | 2016-07-31 | 一种高密度铬酸镧陶瓷发热体制造方法 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610612065.0A CN106278264A (zh) | 2016-07-31 | 2016-07-31 | 一种高密度铬酸镧陶瓷发热体制造方法 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106278264A true CN106278264A (zh) | 2017-01-04 |
Family
ID=57663000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610612065.0A Pending CN106278264A (zh) | 2016-07-31 | 2016-07-31 | 一种高密度铬酸镧陶瓷发热体制造方法 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106278264A (zh) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106396664A (zh) * | 2016-07-31 | 2017-02-15 | 包头稀土研究院 | 一种镁基铝酸镧陶瓷制造方法 |
| CN109928745A (zh) * | 2019-03-15 | 2019-06-25 | 包头稀土研究院 | 高温电解池用陶瓷隔板的制作方法 |
| CN110294629A (zh) * | 2019-08-15 | 2019-10-01 | 内蒙古科技大学 | 一种铬酸镧陶瓷及其制备方法 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101015970A (zh) * | 2007-01-31 | 2007-08-15 | 北京航空航天大学 | 一种新型铬酸镧超高温热障涂层陶瓷层材料 |
| CN102964125A (zh) * | 2012-11-28 | 2013-03-13 | 北京大学 | 一种超高温氧化环境下的电致热陶瓷发热体的制备方法 |
| CN103224395A (zh) * | 2013-05-06 | 2013-07-31 | 瑞科稀土冶金及功能材料国家工程研究中心有限公司 | 一种高温电解制氢电解池用陶瓷连接体及其制作方法 |
| CN105693244A (zh) * | 2016-01-27 | 2016-06-22 | 西南科技大学 | 一种铬酸镧粉体的制备方法 |
-
2016
- 2016-07-31 CN CN201610612065.0A patent/CN106278264A/zh active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101015970A (zh) * | 2007-01-31 | 2007-08-15 | 北京航空航天大学 | 一种新型铬酸镧超高温热障涂层陶瓷层材料 |
| CN102964125A (zh) * | 2012-11-28 | 2013-03-13 | 北京大学 | 一种超高温氧化环境下的电致热陶瓷发热体的制备方法 |
| CN103224395A (zh) * | 2013-05-06 | 2013-07-31 | 瑞科稀土冶金及功能材料国家工程研究中心有限公司 | 一种高温电解制氢电解池用陶瓷连接体及其制作方法 |
| CN105693244A (zh) * | 2016-01-27 | 2016-06-22 | 西南科技大学 | 一种铬酸镧粉体的制备方法 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106396664A (zh) * | 2016-07-31 | 2017-02-15 | 包头稀土研究院 | 一种镁基铝酸镧陶瓷制造方法 |
| CN109928745A (zh) * | 2019-03-15 | 2019-06-25 | 包头稀土研究院 | 高温电解池用陶瓷隔板的制作方法 |
| CN110294629A (zh) * | 2019-08-15 | 2019-10-01 | 内蒙古科技大学 | 一种铬酸镧陶瓷及其制备方法 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ryu et al. | Sintering behaviour and microstructures of carbides and nitrides for the inert matrix fuel by spark plasma sintering | |
| CN106278264A (zh) | 一种高密度铬酸镧陶瓷发热体制造方法 | |
| CN102390079A (zh) | 高压烧结组合模具及其制备纳米陶瓷的高压快速烧结方法 | |
| US20210317045A1 (en) | Highly oriented nanometer max phase ceramic and preparation method for max phase in-situ autogenous oxide nanocomposite ceramic | |
| CN106623934B (zh) | Slm成型钢模具毛坯件的后处理方法及slm成型钢模具的制备方法 | |
| CN106513683A (zh) | 制备细晶高致密的氧化钇弥散强化钨基合金的方法 | |
| RU2013112501A (ru) | Нитридное ядерное топливо и способ его получения | |
| US20140079909A1 (en) | Spinel Ceramics Via Edge Bonding | |
| Chen et al. | Fabrication of YAG transparent ceramics by two-step sintering | |
| WO2024141077A1 (zh) | 一种碳化钨靶材及其制备方法和专用模具 | |
| CN106587940A (zh) | 一种高纯致密氧化镁靶材及其制备方法 | |
| CN112174645B (zh) | 一种制备致密纳米晶粒陶瓷的方法 | |
| CN113173788A (zh) | 一种红外透明陶瓷的快速烧结制备方法 | |
| Trunec et al. | Warm pressing of zirconia nanoparticles by the spark plasma sintering technique | |
| KR102444340B1 (ko) | 열간 가압 소결에 의한 투광성 이트리아의 제조 방법 | |
| KR101810885B1 (ko) | 경사 조성을 갖는 투광성 이트리아 제조 방법 | |
| CN1566021A (zh) | 一种黑色氧化锆陶瓷的制造方法 | |
| JP7537181B2 (ja) | 酸化物焼結体の製造方法 | |
| CN104119079B (zh) | 一种提高氮化硅材料性能一致性的烧结方法 | |
| CN204630389U (zh) | 碳化硅承载体 | |
| CN114835496A (zh) | 一种Cr3C2块体材料的制备方法 | |
| KR101814105B1 (ko) | 배향성이 증가된 열전재료 제조방법 | |
| CN107056289A (zh) | 一种聚碳硅烷制备SiC基纳米复合陶瓷的方法及其应用 | |
| CN106588027A (zh) | 一种高密度氮化硼陶瓷制造方法 | |
| JP2016132612A (ja) | 焼結用金型及びその作製方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170104 |
|
| WD01 | Invention patent application deemed withdrawn after publication |