CN107827451B - 一种利用水淬火降低钛酸铜钙陶瓷损耗的方法 - Google Patents
一种利用水淬火降低钛酸铜钙陶瓷损耗的方法 Download PDFInfo
- Publication number
- CN107827451B CN107827451B CN201711258867.7A CN201711258867A CN107827451B CN 107827451 B CN107827451 B CN 107827451B CN 201711258867 A CN201711258867 A CN 201711258867A CN 107827451 B CN107827451 B CN 107827451B
- Authority
- CN
- China
- Prior art keywords
- temperature
- ccto
- putting
- sol
- ceramic
- 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.)
- Active
Links
Images
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
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
- C04B35/462—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/0063—Cooling, e.g. freezing
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
-
- 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
- C04B2235/3281—Copper oxides, cuprates or oxide-forming salts thereof, e.g. CuO or Cu2O
-
- 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
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Inorganic Insulating Materials (AREA)
Abstract
本发明公开了一种基于溶胶‑凝胶法利用水淬火制备低介电损耗钛酸铜钙陶瓷的方法。具体方法如下:以硝酸铜、硝酸钙、钛酸丁酯为原料,以无水乙醇为溶剂,首先按照钛酸铜钙的化学表达式CaCu3Ti4O12(CCTO)中各化学元素的计量比进行称量配料;接着把配置好的溶胶放置于80℃的水浴锅中,不断搅拌至形成干凝胶;然后先后利用电炉和马弗炉除去干凝胶中的有机物,形成CCTO陶瓷前驱体粉末;之后进行加胶、研磨、造粒、压片,制成陶瓷胚体,再把胚体放入马弗炉内进行烧结、保温;最后在烧结结束后,当炉内温度下降到1000℃以下时取出CCTO陶瓷样品,使其在水中淬火冷却到室温。本发明操作工艺简单,烧结温度较低,制备的陶瓷样品致密性好,介电损耗低,频率稳定性好。
Description
技术领域
本发明属于电介质材料领域,具体涉及一种低损耗钛酸铜钙(CaCu3Ti4O12,简称CCTO)陶瓷的制备方法。
背景技术
随着科技的不断发展,包括微电子行业、新能源行业等诸多领域都对介电材料的小型化、高性能有了更高的标准。因此,巨介电材料成为当今研究的热点。所谓的巨介电材料是指εr>103的介电材料,是使电子器件小型化、高集成化的重要条件之一,在高密度能量存储和微电子器件领域有着很广阔的应用前景。
CCTO陶瓷材料是最近十多年最受关注的巨介电常数材料之一。CCTO陶瓷具有很高的介电常数和很好的温度稳定性,介电常数可达到104~105,介电常数在100~600K几乎没有任何改变,而且没有任何相变的产生。除此之外,CCTO陶瓷还具有优秀的压敏特性,这使其有望在高密度信息存储、薄膜器件、应用型集成电路、高介电电容器以及非线性器件领域得到广泛的应用。
但是,CCTO陶瓷在表现极高介电常数的同时,还伴随着较高的介电损耗(>0.1),这会导致器件在使用过程中产生过多的热量,使得元件温度升高,器件性能劣化,加速器件老化。因此,如何在保证CCTO有高介电常数的同时使其介电损耗下降成为当今研究热点。
现阶段对抑制CCTO陶瓷高损耗的措施主要有以下两大类:一是通过掺杂或取代在CCTO陶瓷中加入新的元素改变其性能,进而降低CCTO陶瓷的介电损耗;二是改变烧结温度、时间、气氛等烧结条件来降低其损耗。而通过改变样品烧结结束后冷却条件的相关方法却鲜有报道。本发明就是提供了一种使CCTO陶瓷损耗下降的全新制备方法。
公开文献“宋江,CaCu3Ti4O12陶瓷淬火态微结构与介电性能研究,陶瓷避雷器,2017 Ser. No. 275 (128-131)”中利用固相法与空气淬火冷却降温的方式制备了CCTO陶瓷,但是其结果却使损耗大幅度提高,这个结果与本发明结果相反,与低损耗CCTO陶瓷的需求不符。
发明内容
本发明针对上述问题,提出了一种低损耗CCTO陶瓷的制备方法。该制备方法可以明显降低CCTO陶瓷的介电损耗,提高了频率稳定性和致密性。
为达到以上目的,本发明采用如下技术方案予以实现:
(1)以摩尔比为1:3:4:9.6的比例分别称取对应质量的硝酸铜、硝酸钙、钛酸丁酯、柠檬酸;
(2)将硝酸铜、硝酸钙、柠檬酸倒入适量的无水乙醇中,不断搅拌使其充分溶解,形成A溶液;
(3)将钛酸丁酯倒入适量的无水乙醇中,搅拌使其溶解均匀,形成B溶液;
(4)保持A溶液不断搅拌的同时,将B溶液缓慢倒入A溶液中,形成溶胶;
(5)将适量聚乙二醇加入到溶胶中,搅拌至完全溶解;把溶解有聚乙二醇的溶胶放入恒温80 ℃的水浴锅中不断搅拌,使之形成凝胶;
(6)将凝胶放入到蒸发皿中,用电炉对其进行去除有机物处理,再用马弗炉进行高温预烧,形成CCTO陶瓷前驱体粉末;
(7)把前驱体粉末倒入玛瑙研钵中并加入适量PVA胶体,充分研磨,过筛造粒,后放入干燥箱中干燥;
(8)称取(7)中制得的适量粉末放入磨具中压片,制得CCTO陶瓷胚体;
(9)陶瓷胚体放入马弗炉中1000~1080 ℃烧结10~18 h;
(10)在烧结结束后,当炉内温度下降到1000 ℃以下时,取出未冷却的CCTO陶瓷样品,使其置于水中(常温下)快速淬火冷却。
用X射线衍射仪检测CCTO陶瓷的微观结构(图1);用宽频介电谱仪(NOVOCONTROLConcept 80)测量样品的介电特性(图2)和损耗特性(图3)。随炉冷却与空气淬火冷却样品性能进行对比。
本发明的优势在于:利用本制备方法制得的CCTO陶瓷与传统溶胶-凝胶法相比,既缩短了制备周期,又使得损耗在原有基础上进一步降低(约0.05),且提高了介电常数的频率稳定性。
附图说明
图1为用水淬火制得的CCTO陶瓷的XRD图。
图2为用水淬火与随炉冷却制得的CCTO陶瓷的介电频谱。
图3为用水淬火与随炉冷却制得的CCTO陶瓷的损耗频谱。
具体实施方式
下面结合具体实施方式对本发明进一步说明。下述说明仅仅是实例性的,而不限制本发明的范围。
实施例1
(1)首先称取四水合硝酸钙(99%)9.5414 g,三水合硝酸铜(99%)29.2851 g,柠檬酸(99%)75.5270 g,将其倒入装有100 ml无水乙醇的烧杯中,不断搅拌使其充分溶解,形成A液;
(2)称取55.0015 g钛酸丁酯(99.5%)并倒入100 ml的无水乙醇中,搅拌使其溶解均匀,形成B液;
(3)在不断搅拌A液的同时,沿着玻璃棒缓慢加入B液,形成溶胶;待其混合均匀后,加入18 ml的聚乙二醇;然后把加有聚乙二醇的溶胶放到80 ℃的水浴锅中,保持搅拌棒180rpm进行搅拌,形成凝胶;
(4)把凝胶倒入蒸发皿中再放到电想·炉上保持400 ℃除去凝胶中的有机物;然后再放入到马弗炉中600 ℃高温预烧2 h,形成CCTO陶瓷前驱体粉末;
(5)把粉体放入玛瑙研钵中,并加入足量的PVA粘合剂,手动研磨3 h,再把其过80目筛,最后将其放入120 ℃干燥箱中干燥10 min;
(6)称取3.2 g粉体放入模具中,用300 MPa的压强压制成片;
(7)把上述氧化锆板以及样品放入马弗炉中内,先以2 ℃/min的升温速率上升到100 ℃保温10 min进行除湿干燥,然后以5 ℃/min的升温速率上升到600 ℃保温1 h进行排胶,最后以10 ℃/min的升温速率上升到1060 ℃保温12 h进行烧结;
(8)烧结结束后,待炉内温度下降到1000 ℃以下时,取出部分样品,使其在水中淬火冷却,其余样品仍在在炉内冷却为作为对比;
(9)在烧结好的样品表面涂上银浆,然后在马弗炉内500 ℃保温0.5 h完成镀银,最后进行介电性能的测量。
用X射线衍射仪检测水淬火的CCTO陶瓷,发现其是纯的CCTO的相(如图1)。用宽频介电谱仪测量样品的介电特性和损耗特性,发现水淬火的样品高介电常数频率宽度明显优于随炉冷却的样品(如图2);水淬火的样品介电损耗在10 kHz室温下的损耗下降到0.05以下,比随炉冷却的样品损耗(0.07)下降了超过30%,同时也提高了低损耗段的频率范围(如图3)。
Claims (1)
1.一种利用水淬火降低钛酸铜钙陶瓷损耗的方法,其特征在于,基于溶胶-凝胶法利用水淬火制备低介电损耗钛酸铜钙陶瓷,其具体制备方法如下:
(1)以摩尔比为1:3:4:9.6的比例分别称取对应质量的硝酸钙、硝酸铜、钛酸丁酯、柠檬酸;
(2)将硝酸铜、硝酸钙、柠檬酸倒入适量的无水乙醇中,不断搅拌使其充分溶解,形成A溶液;
(3)将钛酸丁酯倒入适量的无水乙醇中,搅拌使其溶解均匀,形成B溶液;
(4)保持A溶液不断搅拌的同时,将B溶液缓慢倒入A溶液中,形成溶胶;
(5)将适量聚乙二醇加入到溶胶中,搅拌至完全溶解;把溶解有聚乙二醇的溶胶放入恒温80 ℃的水浴锅中不断搅拌,使之形成凝胶;
(6)将凝胶放入到蒸发皿中,用电炉对其进行去除有机物处理,再用马弗炉进行高温预烧,形成CCTO陶瓷前驱体粉末;
(7)把前驱体粉末倒入玛瑙研钵中并加入适量PVA胶体,充分研磨,过筛造粒,后放入干燥箱中干燥;
(8)称取(7)中制得的适量粉末放入模 具中压片,制得CCTO陶瓷坯 体;
(9)陶瓷坯 体放入马弗炉中,先以2 ℃/min的升温速率上升到100 ℃保温10 min进行除湿干燥,然后以5 ℃/min的升温速率上升到600 ℃保温1 h进行排胶,最后以10 ℃/min的升温速率上升到1060 ℃保温12 h进行烧结;
(10)在烧结结束后,当炉内温度下降到1000 ℃以下时,取出未冷却的CCTO陶瓷样品,使其置于水中快速淬火冷却。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201711258867.7A CN107827451B (zh) | 2017-12-04 | 2017-12-04 | 一种利用水淬火降低钛酸铜钙陶瓷损耗的方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201711258867.7A CN107827451B (zh) | 2017-12-04 | 2017-12-04 | 一种利用水淬火降低钛酸铜钙陶瓷损耗的方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN107827451A CN107827451A (zh) | 2018-03-23 |
CN107827451B true CN107827451B (zh) | 2020-12-11 |
Family
ID=61641327
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201711258867.7A Active CN107827451B (zh) | 2017-12-04 | 2017-12-04 | 一种利用水淬火降低钛酸铜钙陶瓷损耗的方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN107827451B (zh) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112457026B (zh) * | 2020-12-14 | 2023-03-24 | 江西科技学院 | 一种基于还原-氧化气氛协同烧结钛酸铜钙CaCu3Ti4O12陶瓷的方法 |
CN112592192B (zh) * | 2020-12-15 | 2022-12-06 | 江西科技学院 | 一种高介电常数低介电损耗钛酸铜钙陶瓷的烧结方法 |
CN113800901B (zh) * | 2021-09-30 | 2022-10-28 | 太原理工大学 | 低温环境下低损耗钛酸铜镧钙介电陶瓷材料及其制备方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101891460A (zh) * | 2010-07-08 | 2010-11-24 | 桂林理工大学 | 溶胶-凝胶法制备钙铜钛氧化合物粉体 |
CN102173587A (zh) * | 2011-03-03 | 2011-09-07 | 电子科技大学 | 电子基板用微晶玻璃材料及制备方法 |
CN104860673A (zh) * | 2015-05-12 | 2015-08-26 | 太原理工大学 | 一种低介电损耗CaCu3Ti4O12陶瓷的制备方法 |
-
2017
- 2017-12-04 CN CN201711258867.7A patent/CN107827451B/zh active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101891460A (zh) * | 2010-07-08 | 2010-11-24 | 桂林理工大学 | 溶胶-凝胶法制备钙铜钛氧化合物粉体 |
CN102173587A (zh) * | 2011-03-03 | 2011-09-07 | 电子科技大学 | 电子基板用微晶玻璃材料及制备方法 |
CN104860673A (zh) * | 2015-05-12 | 2015-08-26 | 太原理工大学 | 一种低介电损耗CaCu3Ti4O12陶瓷的制备方法 |
Non-Patent Citations (4)
Title |
---|
Bi过量以及冷却方式对BiFeO3-BaTiO3陶瓷的相结构及电学性能的影响;马剑等;《无机材料学报》;20170927;全文 * |
Giant dielectric permittivity and non-linear electrical behavior in CaCu3Ti4O12 varistors from the molten-salt synthesized powder;Yanmin Huang等;《Ceramic International》;20130117;第2-3页第2节第1段、第3节第2-3段和图3b * |
Polaron relaxation and non-ohmic behavior in CaCu3Ti4O12 ceramics with different cooling methods;Laijun Liu等;《Materials Chemistry and Physics》;20130515;全文 * |
The effect of grain boundary resistance on the dielectric response of CaCu3Ti4O12;M.Li等;《Ceramic International》;20150813;全文 * |
Also Published As
Publication number | Publication date |
---|---|
CN107827451A (zh) | 2018-03-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN107827452B (zh) | 一种利用空气淬火降低钛酸铜钙陶瓷损耗的方法 | |
CN107827451B (zh) | 一种利用水淬火降低钛酸铜钙陶瓷损耗的方法 | |
CN110183227B (zh) | 一种Li2MoO4-Mg2SiO4基复合陶瓷微波材料及其制备方法 | |
CN109553411B (zh) | 一种高击穿场强钛酸铜锶钙介电陶瓷材料及其制备方法 | |
CN101362647A (zh) | 锂基低温烧结微波介质陶瓷材料及其制备 | |
CN104003722A (zh) | 可低温烧结的超低介电常数微波介电陶瓷Li3AlV2O8及其制备方法 | |
CN102249670A (zh) | 低温烧结的微波介电陶瓷Li2Ba1-xSrxTi4O16及其制备方法 | |
CN108911746B (zh) | 一种低损耗型钨基超低温烧结微波介质陶瓷材料及其制备方法和应用 | |
CN103342558A (zh) | 可低温烧结的微波介电陶瓷Ba3Ti2V4O17及其制备方法 | |
CN109776089A (zh) | 一种钛酸铜钙基陶瓷材料及其制备方法 | |
CN105294104A (zh) | 低损耗介电可调中介微波介质陶瓷材料及其制备方法 | |
CN111004030B (zh) | 一种MgTiO3基微波介质陶瓷及其制备方法 | |
CN103951414B (zh) | 具有低介电损耗巨电容率和压敏特性陶瓷材料的制造方法 | |
CN102603292A (zh) | 一种用于可低温烧结微波介电陶瓷的复合氧化物 | |
CN103319177B (zh) | 可低温烧结微波介电陶瓷Ba3WTiO8及其制备方法 | |
CN103449820A (zh) | 一种降低锆酸钙微波介质陶瓷烧结温度的方法 | |
CN104045344A (zh) | 可低温烧结微波介电陶瓷Li2Zn3WO7及其制备方法 | |
CN103332932A (zh) | 可低温烧结钒酸盐微波介电陶瓷BaZnV2O7及其制备方法 | |
CN102850057A (zh) | 以氧化铜为添加剂降低铌酸钕微波介质陶瓷烧结温度的方法 | |
CN108484167A (zh) | 一种宽温度区间的高温无铅陶瓷电容器材料及制备方法 | |
CN104003721A (zh) | 可低温烧结的微波介电陶瓷Li2W2Zn3O10及其制备方法 | |
CN104311029B (zh) | 温度稳定型中介电常数微波介电陶瓷Bi2La4Ti5O19 | |
CN103951430B (zh) | 低温烧结铌酸盐高品质因数微波介质陶瓷材料 | |
CN102531568A (zh) | 可低温烧结微波介电陶瓷LiBa4Bi3O11及其制备方法 | |
CN105565808A (zh) | 一种低温共烧微波介质陶瓷材料及其制备方法 |
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 | ||
GR01 | Patent grant | ||
GR01 | Patent grant |