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sialon粉体
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  sialon powder
     A Study on the Preparation of the Sialon Powder with Fly Ash by the Silicon Thermal Reduetion-nitridation Method
     硅热还原氮化法粉煤灰制备Sialon粉体的研究
短句来源
     Oxidation Kinetic Model of SiAlON Powder
     SiAlON粉体氧化动力学模型
     The reaction process of synthesizing β Sialon powder was researched and the optimum synthesizing process parameters are:reaction temperature 1500 ℃,holding time 6 h,mass percent of C 20%,N 2 flow 1.5 L·min -1 .Under such conditions,the content of β Sialon in the products is over 90%.
     研究了合成β Sialon粉体的反应过程和最佳工艺参数 ,在反应温度为 1 5 0 0℃ ,保温 6h ,碳的质量分数为2 0 % ,氮气流量为 1 .5L·min- 1 的工艺条件下 ,产物中的β Sialon可达 90 % (质量分数 )以上。
短句来源
     Sialon powder was synthesized from the fixture of kaolin and carbonblack through carbotherrnal reduction-nitridation reaction. The phase composition andreaction convertion were analysed using x-ray diffraction, IR-spectrum and measuringweight loss after reacting. It is shown that the formation of β'-Sialon powder is affectedsignificantly by the reaction conditions,including heatipg temperatures,holding time,and ratio of Kaolin and carbon.
     通过高岭土碳热还原-氮化反应合成了β'-Sialon粉体.用x-射线衍射、红外吸收光谱、失重率的测定来分析该粉体矿物组成与合成反应转化率.反应加热温度、保温时间、高岭土与炭黑的配比等反应条件对β'-Sialon粉体的形成影响很大.用扫描电镜观察了粉体的形态.
短句来源
     The influence of technological condition(including sample composition,synthesis temperature,holding time and partial pressure of N 2) on synthesis of β' Sialon powder from clay by carbothermal reduction nitridation was researched with weightlessness & XRD analysis.
     利用失重和XRD分析研究了试样组成、合成温度、保温时间和N2 分压等工艺条件对粘土碳热还原氮化合成 β’ Sialon粉体的影响。
短句来源
  “sialon粉体”译为未确定词的双语例句
     Effect of NH_4F and Temperature on Combustion Synthesis of Rod-Like Yb α-Sialon Powder
     NH_4F及燃烧温度对燃烧合成长柱状Yb α-Sialon粉体的影响
短句来源
     The particle size of β-Sialon was about 1μm,the content of β-Sialon was about 90%,and the Z-values of β-Sialon was 2.9.
     合成的β-sialon粉体的粒径在1μm左右,纯度为90%,Z值为2.9。
短句来源
     Combustion Synthesis of Rod-like Yb α-Sialon Powders
     燃烧合成长柱状Yb α-Sialon粉体
短句来源
     A Study on Kinetics of Synthesizing β'-Sialon Powders
     β′-Sialon粉体的反应动力学研究
短句来源
     Oxidation of Ca- α/β -Sialon powder was also investigated.
     并对Ca-α/β-Sialon粉体的抗氧化性能进行了研究。
短句来源
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  相似匹配句对
     Review of the synthesis of SiAlON powders
     SiAlON合成的研究进展
短句来源
     Oxidation Kinetic Model of SiAlON Powder
     SiAlON氧化动力学模型
     PREPARATION AND CHARACTERIZATION OF β′-SIALON POWDER
     β′-Sialon的制备及表征
短句来源
     Study on synthesizing SiAlON powders from fly ashes
     煤灰合成SiAlON研究
短句来源
     A Study on Kinetics of Synthesizing β'-Sialon Powders
     β′-Sialon的反应动力学研究
短句来源
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  sialon powder
Thermodynamical characteristics of partial reactions related to preparation of sialon powder from kaolin
      
Sialon ceramic materials and its main three preparation methods have been outlined, among which preparing sialon powder from Kaolin through the carbothermal reduction and nitridation process is an economical, simple and practical synthesis process.
      
Partial reactions related to the chemical reaction system of the carbothermal and nitridation process, sialon powder prepared from the purified Kaolin, are analyzed thermodynamically, the systhesis temperature of sialon powder is 1400°C.
      
Sialon ceramics were prepared from a carbothermally derived β-sialon powder and then sintered in a nitrogen atmosphere with yttria admixture.
      
A major part of the SiO evolved by the carbon reduction was trapped by carbon then consumed by carbon reduction and nitridation to form the sialon powder.
      
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The sintering capacity of β'—Sialon synthetic powder from Fujian's kaolin has been investigated.The results show sintering temperature should not be less than 1700℃ for getting dense β'—Sialon sintered material under the condition of pressureless-sintering and no other addi- tives.The sintering mechanism is a diffusion-dissolution-precipitation multiprocessing.CaO,MgO and Fe_2O_3 impurities in kaolin can produce low melting glass at the grain-boundary of β'—Sialon sintered material and promote β'—Sialon powder's...

The sintering capacity of β'—Sialon synthetic powder from Fujian's kaolin has been investigated.The results show sintering temperature should not be less than 1700℃ for getting dense β'—Sialon sintered material under the condition of pressureless-sintering and no other addi- tives.The sintering mechanism is a diffusion-dissolution-precipitation multiprocessing.CaO,MgO and Fe_2O_3 impurities in kaolin can produce low melting glass at the grain-boundary of β'—Sialon sintered material and promote β'—Sialon powder's sintering.The micro-structure of sintered β'— Sialon looks like a reinforced concrete texture,the long bar β'—Sialon grains combine crosswise each other and the granular α—Si_3N_4,SiO_2 and mullite fill in the net structure gaps.In addition, sintering temperature and oxygen content of firing atmosphere have a great effect on the density and mineral constitue of β'—Sialon sintered material.

本文研究了由福建高岭土合成的赛龙(β—Sialon)粉体的烧结性能。实验表明:在常压和不加任何其它添加剂的条件下,烧结温度不低于1700℃才能获得较致密的烧结材料。烧结机理为扩散—溶解—沉析复合型机制。原料中 CaO,MgO 和 Fe_2O_3等杂质在高温烧结过程于晶界处形成低熔液相,加速了β'—Sialon 坯体烧结致密化进程。β'—Sialon 烧结体由长柱状β'—Sialon 晶体相互交织成网状骨架,并由石英,氮化硅,莫来石和少量β'—Sialon 等轴晶粒填充到骨架空隙的复合型结构。此外,烧结温度与烧结气氛中氧气含量对烧结密度和矿物组成影响也很大。

Sialon powder was synthesized from the fixture of kaolin and carbonblack through carbotherrnal reduction-nitridation reaction.The phase composition andreaction convertion were analysed using x-ray diffraction, IR-spectrum and measuringweight loss after reacting. It is shown that the formation of β'-Sialon powder is affectedsignificantly by the reaction conditions,including heatipg temperatures,holding time,and ratio of Kaolin and carbon. The morphology of the synthesized β'-Sialon was observed by SEM.

通过高岭土碳热还原-氮化反应合成了β'-Sialon粉体.用x-射线衍射、红外吸收光谱、失重率的测定来分析该粉体矿物组成与合成反应转化率.反应加热温度、保温时间、高岭土与炭黑的配比等反应条件对β'-Sialon粉体的形成影响很大.用扫描电镜观察了粉体的形态.

The kinetics parameters were determined by combusting the β'-Sialon powders sruthesind from the reduction and nitriding reaction of natural kaolin. The instantaneous speed and the speed constant were calculated through physcal chemistry method, the reaction progression and apparent activity energy were also concluded.

利用燃烧法测定高岭土还原氮化反应合成β'-Sialon粉体的反应动力学半数,确定适宜的反应温度及达到平衡所需时间,运用物理化学的方法计算出各反应温度下的瞬时速率及达率常数,总结出理想温度范围内的反应级数与表观活化能。

 
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