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工藝因素對(duì)納米四方多晶氧化鋯漿料固化的影響
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TF174

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國(guó)家自然科學(xué)基金(50072009)，清華大學(xué)“985”項(xiàng)目資助


Influence of Process Factors on Polymerizing Behaviors of Nano-sized Tetragonal Polycrystals Zirconia Slurries
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    摘要:

    水基凝膠流延成型工藝是1種薄片式材料制備新技術(shù)，主要是利用陶瓷漿料中有機(jī)單體聚合反應(yīng)形成三維空間的網(wǎng)絡(luò)結(jié)構(gòu)，將陶瓷顆粒填充于網(wǎng)絡(luò)骨架中形成具有較高強(qiáng)度的結(jié)構(gòu)均勻的陶瓷坯體。主要研究四方多晶氧化鋯薄膜制備過程中，有機(jī)單體溶液濃度和pH值對(duì)納米四方多晶氧化鋯漿料固化反應(yīng)的影響。結(jié)果表明：隨漿料中有機(jī)單體濃度的增加，漿料聚合反應(yīng)速率顯著提高，為保證合適的固化時(shí)間，有機(jī)單體濃度可控制存10％～40％(質(zhì)量分?jǐn)?shù))范圍內(nèi)；漿料的PH值對(duì)聚合反應(yīng)速率有顯著的影響，隨PH值的增大，聚合反應(yīng)速率降低，合適的pH值范圍為9～10；在高于35℃溫度范圍內(nèi)，聚合反應(yīng)速率變化顯著，適當(dāng)?shù)某尚蜏囟确秶鸀?5℃～45℃；引發(fā)劑和催化劑用量增加，反應(yīng)速率大大提高，為獲得較好的成型性能，漿料的引發(fā)劑用量應(yīng)控制在0．15％～0.30％(體積分?jǐn)?shù)，下同)的范圍內(nèi)，催化劑用量在0．20％左右為宜。

    Abstract:

    The aqueous-gel-tape-casting process is a novel technique fabricating flat ceramic materials. Employing the mechanism of three dimensions net structure formed by polymerized organic monomers, the high strength green bodies are formed by the net structure and ceramics particle filling in it. In the present work the influence of the organic monomer concentration and pH value and the polymerizing temperature and the concentration of initiator and catalyst on polymerization of the nanosized 3Y-TZP slurries during the aqueous-gel-tape-casting process was investigated. The results show that the polymerizing rate of the organic monomers increases greatly with the increase of the concentration of organic monomer in slurries. To ensure the proper polymerizing time, the concentration of the organic monomer solution must be controlled in the range of 10wt%~40wt%. The polymerizing rate of the organic monomers changes evidently with the different pH values. The higher the pH value, the lower the polymerization rate. The proper pH value is between 9~10. The polymerizing rate of the organic monomers increases with the increase of the temperature. Exceeding 35oC the polymerizing rate of the organic monomers changes greatly. The proper polymerizing temperature is from 35oC to 45 oC. The polymerizing rate of the organic monomers increases evidently with the increase of the concentration of the initiator and the catalyst. For perfect forming properties the concentration of initiator should be controlled in the range of 10wt% to 40wt%, the concentration of catalyst is about 0.20vol %.

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譚強(qiáng)強(qiáng) 羅紹華 唐子龍 張中太.工藝因素對(duì)納米四方多晶氧化鋯漿料固化的影響[J].稀有金屬材料與工程,2004,33(5):526~530.[Tan Qiangqiang, Luo Shaohua, Tang Zilong, Zhang Zhongtai. Influence of Process Factors on Polymerizing Behaviors of Nano-sized Tetragonal Polycrystals Zirconia Slurries[J]. Rare Metal Materials and Engineering,2004,33(5):526~530.]
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  • 最后修改日期:2002-10-08
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