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本帖產(chǎn)生 1 個(gè) 翻譯EPI ，點(diǎn)擊這里進(jìn)行查看

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銅蟲 (正式寫手)

應(yīng)助: 4 (幼兒園)
金幣: 839.5
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注冊(cè): 2014-09-12
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專業(yè): 高分子合成化學(xué)

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EXERIMENTAL PROCEDURE
Three kinds of samples were prepared: 1) two AZT ceramics, herein after referred to as AZT and AZTn, differing in the used zirconia and titania powders; 2) pure aluminum titanate (for adding presynthesized Al2TiO5 to the spinel material); 3) Al2O3-rich magnesium aluminate spinel with or without aluminum titanate.
For preparing the AZT ceramic, 95 wt% of the alumina powder Martoxid MR70 (Albemarle: Martinswerk, Germany; d50 0.8 μm), 2.5 wt% of zirconia, and 2.5 wt% of titania powder were mixed. The ZrO2 powder P59 (Saint Gobain; d50 1.1 μm), containing 3.4 wt% of the stabilizing oxide MgO, and the TiO2 powder Tronox TR (Sachtleben, Germany; d50 1.0 μm) were used in the case of the AZT samples, aqueous dispersions of nano-sized zirconia and titania - VPDisp W2650x and VPDisp W740x (Evonik, Germany) - for preparing the AZTn samples.
For the synthesis of pure Al2TiO5 by reaction sintering of alumina and titania, the powders Al2O3 Martoxid MR70 and TiO2 Tronox TR were mixed in a molar ratio of 1:1.
12 wt% of pre-synthesized Al2TiO5, which was milled by means of the planetary ball mill “Pulverisette 5” (Fritsch, Germany), and 88 wt% of the powder AR78 (particle size range < 20 μm, d50 1.6 μm; Almatis, Germany) were used for preparing the Al2O3- rich magnesium aluminate spinel samples with aluminum titanate. Additionally, spinel samples without Al2TiO5 were produced.
Aqueous suspensions of the different powder mixtures were prepared and homogenized in rotating polyethylene bottles with alumina grinding balls. The suspensions contained suitable amounts of organic dispersant and binding agent. All samples were produced by slip casting in plaster molds. The dimensions of the cavities of the molds, in which the test specimens are formed, were approximately 5 × 4 × 50 mm3.

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1樓 2014-09-14 10:16:56

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cmds1907

鐵桿木蟲 (著名寫手)

翻譯EPI: 73
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根本停不下: 金幣+15, 翻譯EPI+1, ★有幫助 2014-09-14 12:45:07

實(shí)驗(yàn)步驟
三種樣品的制備：1)兩個(gè)AZT陶瓷，在此被稱為AZT和AZTn，他們使用不同的氧化鋯和二氧化鈦粉末；2)純鈦酸鋁(對(duì)于添加預(yù)合成的Al2TiO5到尖晶石材料)；3) 含或不含鋁鈦酸的富Al2O3鋁酸鎂尖晶石。
為制備AZT陶瓷，將95 wt %的氧化鋁粉末Martoxid MR70(德國(guó)雅寶公司：Martinswerk；d50 0.8μm)，2.5 wt %的氧化鋯，2.5 wt %的二氧化鈦粉末混合。氧化鋯粉末P59(法國(guó)圣戈班；d50 1.1μm)，包含3.4 wt %的穩(wěn)定氧化物氧化鎂和二氧化鈦粉末Tronox TR(德國(guó)薩哈利本；d50 1.0μm)被用于AZT樣品的情況，納米級(jí)氧化鋯和二氧化鈦的水分散體 —— VPDisp W2650x和VPDisp W740x(德國(guó)贏創(chuàng))——用于制備AZTn樣品。
為合成純的Al2TiO5，通過氧化鋁和二氧化鈦粉末反應(yīng)燒結(jié)，粉末氧化鋁Martoxid MR70和二氧化鈦Tronox TR以摩爾比1:1混合。
12 wt % 預(yù)合成的Al2TiO5，借助行星式球磨機(jī)“Pulverisette 5”(德國(guó)弗里奇)磨碎，而88 wt %的粉末AR78(粒徑范圍< 20μm d50 1.6μm；德國(guó)安邁)被用于制備富氧化鋁酸鎂鋁尖晶石樣品。另外，也制備了不含Al2TiO5的尖晶石樣品。
制備了不同粉體混合物的水懸浮液，并在具有氧化鋁磨球的旋轉(zhuǎn)聚乙烯瓶中均質(zhì)化。懸浮液中含有適量的有機(jī)分散劑和粘合劑。所有樣品都是由石膏模具注漿成型法制備。形成試樣的模具腔的(外形)尺寸大約為5×4×50 mm3。

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2樓2014-09-14 12:37:31