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Information × Registration Number 0215U001987, 0115U003807 , R & D reports Title Production technology reprocessing of mix from stabilized zirconia and pilot batches of powders for plasmic coating, ramming mixes and mortars from ZrO2 and periclase chromate powders out put. popup.stage_title Head Shulik I., Registration Date 27-08-2015 Organization Public joint stock company "The Ukrainian research institute of refractories named after A.S.Berezhnoy" popup.description2 The object of study is the mass of the stabilized zirconia. Purpose is providing of novel stabilized zirconia material. Research methods - chemical, petrographic, XRD. Investigated the effect of the additive monoclinic ZrO2 (0, 10, 20, 30 and 40 %) after heat treatment at 100, 150, 400, 1580 and 1750 ° C for the main characteristics of properties (Potkr, ?kazh, ?szh, Ttepl. (1300 °C - air )) on pressed samples of phosphoric acid (P2O5 2.6 %) of ZrO2, stabilized by combined addition of CaO + MgO (in the ratio 4.4 : 1.3, 2.9 : 2.6, 1.5 : 3.9 wt.%) compared with samples of ZrO2, CaO-stabilized only (5.8 wt.%) and MgO (5,2 wt.%). In the samples without the addition of monoclinic ZrO2 as increases in the stabilizing additive MgO 0 to 5.2 (wt.%), The apparent density of the crude is reduced to 4.43 from 4.57 g/cm3. This is due, apparently, more active interaction with the masses of H3PO4 ZrO2, CaO stabilized, making them better flexibility and compressibility compared with the masses of ZrO2, stabilized MgO. When injected into the additive composition samples of monoclinic ZrO2 and 30 % increases the apparent density of the raw ~ at 0,14-0,20 g/cm3, while increasing the amount of additive to 40% - reduced slightly to 0.01-0.03 g/cm3. This is because the finely divided monoclinic ZrO2 than stabilized, and its true density higher. The open porosity of the samples of all studied in this paper compositions after heat treatment at 100, 150, 400, 1580 and 1750 °C, naturally decreases with the introduction of their constituent 20-30 % additives monoclinic ZrO2. Further increase in the amount of additive to 40 % leads to a deterioration of the indicator. Change apparent plotnosmti samples has an inverse pattern. The compressive strength of samples of each of the studied compositions without additives and with 20-30 % monoclinic ZrO2 is characterized by close enough indicators. By increasing the additive amount over 30 % of the compressive strength to decrease. After calcination at 1580 for samples of 1750 °С ZrO2, CaO-stabilized or only MgO, there is considerable shrinkage, which increases the amount of additive in the monoclinic ZrO2 is reduced to 30 % from 2.1 to 1.0 % and 0,9-0,2 % respectively, while increasing the amount of additive to 40 % noted a slight increase (0.5 %). For samples of ZrO2, CaO-stabilized additive combination + MgO, regardless of the amount of additive and the ratio of monoclinic ZrO2, predominantly a slight increase (0.6 %), which is certainly important for use in high temperature refractory. For samples baked at a temperature of 1580 °C, measured thermal resistance (1300 °C off-air). Thermal stability of samples from ZrO2, CaO-stabilized (5.8 %) and MgO (5,2 %) or combined addition of CaO + MgO (1,5 : 3,9), and low thermal cycles 2-10. The highest heat resistance - 51 thermal cycles of samples characterized ZrO2, CaO-stabilized + MgO (2,9: 2,6), supplemented with 20 % monoclinic ZrO2. On the basis of the research found that after calcination at 1580 °C for most indicators temple complex of properties harakterizuyutsya samples from the mass of ZrO2, stabilized with 2.9 % CaO + 2,6 % MgO, supplemented with 20 % monoclinic ZrO2: open porosity of 14.3-14.8 %, the apparent density of 4,67-4,69 g/cm3, and compressive strength of 62-68 MPa, temperature resistance (1300 °C off-air) 51 thermal cycles, rising 0.2 %. As a result of the research improved manufacturing technique based on the mass of the new material of ZrO2, stabilized with 2.9 % CaO + 2,6% MgO. This material can be recommended for the test in the lining of the combustion zone of the carbon black production reactors and pyrolysis oil. The influence of the type of phosphate binder (dihydrogen phosphate, calcium hydrogen phosphate, zirconium, magnesium dihydrogen phosphate) on the basic parameters of the sample properties vibrocasting ZrO2, CaO stabilized with the addition of 30 % monoclinic ZrO2 after heat treatment. It is established that as the phosphate binder in the manufacture of these products vibratory casting method may be used only because calcium dihydrogen phosphate, zirconium hydrogen phosphate that has no binding capacity, magnesium dihydrogen phosphate and does not provide a high quality raw. Investigated the effect of the type of phosphate binder (phosphoric acid and calcium dihydrogen phosphate content at 2.6 % P2O5) and a method of molding (molding and vibratory casting) on the basic parameters of the properties of the samples ZrO2, CaO stabilized with the addition of 30 % monoclinic ZrO2 after heat treatment at 100, 400, 1580 °C. It was found that at this stage of the research samples produced by the method of pressing on phosphoric acid have higher rates of properties than the samples produced by the method of pressing and vibration casting, on a bunch of calcium dihydrogen phosphate, namely: (Tobzhiga - 1580 °С) apparent density of 4.81 against 4.60 and 4.58 g/cm3, an open porosity of 12.3 against 15.7 and 16.5%; compressive strength of 52.0 against 18.5 and 17.8 MPa, respectively. The studies on the selection of the optimum lubricant for metal molds (grease, graphite + oil, liquid paraffin and water emulsion) for vibratory casting products made of ZrO2, CaO stabilized with the addition of 30 % monoclinic ZrO2 on a bunch of calcium dihydrogen phosphate. Found that the aqueous emulsion of the lubrication liquid paraffin provides better surface quality of products after parsing and forms recommended. In PJSC "UKRNIIO NAMED AS Berezhnev "made experimental batches: mixture of powders for ramming mass brand SMTSN-93, as well as mortar, MC-93-1 with performance properties that comply with the requirements of TU; powders for plasma spraying brands PTSPK 100, PTSPK-63 PBPK-63-1, PTSPK-40, with indicators of properties corresponding to the requirements of TU; periclase powder fraction < 1 mm with indicators properties consumers demand. This refractory products supplied to consumers in the domestic and foreign markets (exports to Russia). To continue work towards the development of mass production technology based on a new material from ZrO2, stabilized with the addition of a combination of CaO + MgO, the release of an experimental batch and transfer it to the industrial tests in the service. Product Description popup.authors Шишковський Д.О. popup.nrat_date 2020-04-02 Close