Synthsis of nano-structured ceramics by electromagnetic-assisted processing

电磁辅助加工合成纳米结构陶瓷

• 批准号: 16360364
• 负责人: MAKINO Yukio
• 金额: $ 9.66万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16360364/
• 关键词: millimeter-wave sintering; ytteribia-base aids; aluminum nitride; pulsed high current sintering (SPS); nano-structured single-phase antase; electromagnetically driving force; preferential orientation; high dense nano-structured alumina; ナノ構造アナターゼ

Electromagnetically-assisted effects on the materials characters in the consolidation of powder materials were investigated in the millimeter-wave and pulsed high current (or SPS) heating processes and it was tried to develop nano-structured ceramics with the two processes. The following results were obtained ;1) It was found that ytterbia-base sintering aids are very effective for low temperature rapid sintering of A1N and Si3N4. Especially, A1N with higher thermal conductivity than 200W/(m・K) was successfully synthesized in the conditions of one-order shorter sintering time and 200cC lower temperature than those in conventional method.2) In the millimeter-wave sintering of A1N arid Si3N4, it was found that the composition of sintering aid should be designed so as to correspond the composition of intergranular phase in the sintered A1N to eutectic one in the system of Al2O3-Yb2O3. Further, successful synthesis of the A1N with about 150W/(nr K) at 1500°C using a aid of CaO-Al2O3-Yb2O3 … More system shows high possibility of producing a cheep A1N.3) It was succeeded to produce dense nano-structured anatase with grain size less than 300nm by using pulsed high current heating (SFS) process. Further, z-axis directional preferential orientation can be generated by consolidating at a temperature below the temperature of anatase-rutile transition, and the degree of preferential orientation can be controlled by the change of current and pressure.4) Formation of solid solution between strontium and barium titanates by pulsed high current heating (SPS) method was detected at 200°C lower temperature than that in the conventional method, resulting in verification of the enhanced mass transfer under the pulsed high current filed.5) Dense nano-structured alumina with the grain size less than 300nm was successfully synthesized by sintering alumina nano-powder of 100nm at the low temperature (1150°C) and a short time (10 min) using pulsed high current heating (SPS) method. In the use of alumina nano-powder of 230nm, dense nano-structured alumina with the grain size less than 500nm could be also synthesized at 1200°C using the same method. Less

在毫米波和脉冲高电流（或SP）加热过程中研究了对粉末材料合并中材料特征的电磁辅助影响，并试图通过这两个过程开发纳米结构的陶瓷。获得了以下结果； 1）发现ytterbia-base烧结辅助工具对于A1N和SI3N4的低温快速烧结非常有效。特别是，在一阶短烧结时间和200cc的温度的条件下成功合成了高于200W/（M k）的热导率的A1N（m k）比常规方法中的A1N。 Al2O3-YB2O3系统中的Eutectic One。此外，在1500°C下，成功合成了A1N，借助CaO-Al2O3-YB2O3在1500°C下的大约150W/（NR K）…更多的系统表现出很大的可能性，可以成功产生廉价的A1N.3），它成功地生产了密集的纳米结构式解剖酶，其晶粒结构酶的晶粒尺寸具有小于300nm的晶粒尺寸，而不是使用脉冲高的高热量（SF）。此外，可以通过在低于解剖酶 - 鲁丁过渡温度的温度下巩固的Z轴来产生Z轴，并且可以通过在200°C降低的温度（SPS）的脉冲较低温度来控制质量和压力的固体溶液之间的固体溶液在200°C降低的方法中，从而控制了优选方向的程度。4） 5）晶粒尺寸小于300nm的致密纳米结构的氧化铝，通过在低温（1150°C）和短时间（10分钟）使用脉冲高电流加热（SPS）方法成功合成了晶粒尺寸小于300nm的密集纳米结构的氧化铝。在使用230nm的氧化铝纳米粉中，晶粒尺寸小于500nm的密集纳米结构氧化铝也可以使用相同的方法在1200°C下合成。较少的

项目成果

SPS effect on solid solution formation between barium and strontium titanates

SPS 对钛酸钡和钛酸锶固溶体形成的影响

• 发表时间: 2007
• 期刊: J. Jpn. Soc. Powder Powder Metallurgy(粉体および粉末冶金) Vol.54, No.3
• 作者: Y.Makino;T.Tanaka;S.Yamada
• 通讯作者: S.Yamada

Properties and microstructure of aluminum nitride sintered by millimeter-wave heating

• DOI: 10.1016/j.jallcom.2004.12.103
• 发表时间: 2006-02
• 期刊: Journal of Alloys and Compounds
• 影响因子: 6.2
• 作者: T. Yoshioka;Y. Makino;S. Miyake;H. Mori

Characteristics of millimeter-wave heating and smart materials synthesis

毫米波加热与智能材料合成的特点

• 发表时间: 2007
• 期刊: ISIJ International Vol.47, No.4
• 作者: Y.Makino;M.sakaguchi;J.Terada;K.Akamatau;Y.Makino
• 通讯作者: Y.Makino

Low Temperature Millimeter-Wave Sintering of Aluminum Nitride with Oxide Additive of CaO-Al2O3-Yb2O3 System

• DOI: 10.2497/jjspm.53.143
• 发表时间: 2006-02
• 期刊: Journal of The Japan Society of Powder and Powder Metallurgy
• 作者: T. Yoshioka;Y. Makino;S. Miyake

Consolidation of utrafine alumina powders with SPS method

SPS法固结超细氧化铝粉

• 发表时间: 2007
• 期刊: J. Jpn. Soc. Powder Powder Metallurgy(粉体および粉末冶金) Vol.54, No.4
• 作者: Y.Makino;M.sakaguchi;J.Terada;K.Akamatau
• 通讯作者: K.Akamatau