Mechanoactivation of Clinoptilolites with Sodium and Ammonium Hydrophosphates to Improve Their Electrophysical Properties

IF 0.8 4区 材料科学 Q4 MATERIALS SCIENCE, CERAMICS
O. N. Dabizha, T. P. Soloboeva, T. V. Khamova, O. A. Shilova
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Abstract

The mechanochemical activation of zeolite (clinoptilolite and clinoptilolite–stilbite) rocks with acidic salts—sodium hydrogen phosphate and ammonium hydrogen phosphate—with the weight ratio of the initial components of 1 : 1 in an IVS-4 vibratory attritor (1500 rpm, 0.6 kW, specific power 4 W/g, steel grinding set) is studied. The structure, chemical and phase composition, and thermal stability of salt-modified zeolite samples are studied by infrared spectroscopy, atomic emission spectrometry, X-ray phase analysis, and differential scanning calorimetry. The specific volume resistance of pelletized samples is measured using a three-electrode circuit. It is established that the electrical conductivity of high-silica zeolite rocks modified with sodium and ammonium hydrophosphates is 2.2 × 10–6 up to 2.4 × 10–5 S m–1 at 25°C. It is shown that the mechanochemical activation of clinoptilolite and clinoptilolite–stilbite rocks with sodium hydrogen phosphate in a vibratory attritor at a mechanical energy dose of 2.4 kJ/g increases the conductivity of mechanically activated zeolites by factors of 140 and 470 at 25°C, and by factors of 30 and 490 at 100°C, respectively. This allows us to consider mechanochemical activation as a promising method for improving the electrical properties of mineral materials.

Abstract Image

氢磷酸钠和氢磷酸铵对斜沸石的机械活化改善其电物理性质
在IVS-4型振动磨耗器(转速1500转,功率0.6 kW,比功率4 W/g,磨钢装置)中,研究了初始组分重量比为1:1的酸性盐(磷酸氢钠和磷酸氢铵)对沸石(斜沸石和斜沸石-静沸石)的机械化学活化作用。采用红外光谱、原子发射光谱、x射线物相分析和差示扫描量热法研究了盐改性沸石样品的结构、化学组成、物相组成和热稳定性。用三电极电路测量了球团样品的比容电阻。经氢磷酸钠和氢磷酸铵改性的高硅沸石在25℃时的电导率为2.2 × 10-6 ~ 2.4 × 10-5 S - m-1。结果表明,在振动磨蚀器中,以2.4 kJ/g的机械能剂量对斜沸石和斜沸石-静沸石进行机械化学活化,25℃时机械活性沸石的电导率提高了140倍和470倍,100℃时机械活性沸石的电导率提高了30倍和490倍。这使我们认为机械化学活化是改善矿物材料电性能的一种很有前途的方法。
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来源期刊
Glass Physics and Chemistry
Glass Physics and Chemistry 工程技术-材料科学:硅酸盐
CiteScore
1.20
自引率
14.30%
发文量
46
审稿时长
6-12 weeks
期刊介绍: Glass Physics and Chemistry presents results of research on the inorganic and physical chemistry of glass, ceramics, nanoparticles, nanocomposites, and high-temperature oxides and coatings. The journal welcomes manuscripts from all countries in the English or Russian language.
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