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<table border="0" cellpadding="3" cellspacing="1" width="100%" class="forumline"> <tr> <th class="thCornerL" width="22%">Autor</th> <th class="thCornerR">Wiadomość</th> </tr> <tr> <td width="22%" align="left" valign="top" class="row1"><span class="name"><a name=""></a><b>defgf10aj</b></span></td> <td class="row1" valign="top"><table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="100%"><img src="http://picsrv.fora.pl/Elveron/images/icon_minipost.gif" width="12" height="9" alt="Post" title="Post" border="0" /><span class="postdetails">Wysłany: Pią 12:19, 31 Gru 2010<span class="gen"> </span> Temat postu: converse pas cher Preparation of fluoride glass bl</span></td> </tr> <tr> <td colspan="2"><hr /></td> </tr> <tr> <td colspan="2"><span class="postbody">,<a href="http://www.converse-pascher.org" target="_blank" class="postlink">converse pas cher</a> <br />Preparation of fluoride glass block ZrF4 based fusion machine <br /> <br /> <br />Controller (PID) control. In this device,<a href="http://www.ugg-italia.net" target="_blank" class="postlink">ugg italia</a>, the four controllers are remote setting mode operation,<a href="http://www.ugg-uggboots.org" target="_blank" class="postlink">ugg boots</a>, the controller is in parallel with the 0 to 5 V DC control signal connections. Control signal is controlled by the computer interface board data collection and digital / analog side occurred. This melting temperature increases or when the thermal insulation of various processes can be controlled by computer. This made up a GWBASIC language program. As mentioned above,<a href="http://www.uggbootsespana.com" target="_blank" class="postlink">ugg boots España</a>, by measuring the temperature of the melt crucible support platform (O.3cm thick) the temperature determined. The resulting error is l Internet l can be ignored (<5K). In thermal equilibrium conditions, the axial temperature distribution measurements show that near the crucible of this small difference (see Figure 2). Thermocouple measuring the temperature of the smelting process output is recorded in the records on paper or converted to analog voltage (via the line integral thermocouple amplifier). This voltage can be read or mountain-board data collection analog / digital channels stored on the computer. This will help later to analyze the thermal history of melting with a particular glass sample. Control has already been mentioned in the top of the atmosphere, in order to prevent the absorption of water vapor and oxygen rr, melting of such fluoride glass demanding atmosphere control. Set of melting in the Yi system, the study of pure He used to wash the container filling the whole melting process, the typical flow of 0.5 l L / min. HeJfJ molecular sieve drying, into the container of water <1ppmv. Order melting temperature insulation pull heavy metal fluoride glass melting Figure 1 device is also set to cm, Figure 3, the furnace temperature distribution in the axial (all four heating zones are set T00 ��). \Or SF. In order to provide an oxidation atmosphere and to remove residual water and oxide impurities. He and C1z (SF.) Gas flow through mass flow controller, and blown into the reactor before the gas distribution system in a mixture of good. The inlet is a stainless steel welded to the melting Dan Yingrong close coupling device on the bottom. (Which can be seen in Figure 2 from the original.) Gas through a gas outlet (diameter 1.0cm, 0.375 when the stainless steel tube) into an alkali scrubbers in. Outlet is welded tight coupling on the top. Melting performance of the system described above melting system used, we have the conventional melting a ~ 60cm. Charge of the glass, using glass crucible, the typical formula (molecular percentages): 53Zr?. �� 20BaF2 �� 4La / ~ �� 3A1F8 �� 20NaF (ZAN) o the current volume by charging the crucible size restrictions. However, because the temperature long enough uniform heating zones, so those with longer crucible (diameter change), to charge with this device can increase the volume. Figure 4 shows the melting in this system, a representative of glass heating curve. It does not include the subsequent annealing into account. Not involved in the initial reaction with the atmosphere, but the sample obtained is gray, the whole sample is filled with black and red particles. This situation similar to the results of other researchers, indicating the presence of a zr. And / or zr fluoride. Application s (about 40%) after a lot better, but not completely eliminated. Since then we have to maintain the high temperature phase into the cl. Gas as oxidant. Use of such an atmosphere, then quenched by the above method to obtain a transparent glass block. (Figure 5 is a sub-text.) * 62 ��,-,,-, mystery gift time (minutes) Figure 4, broken glass melting process ZAN representative heating curve at the end conclusions of this paper describes a device at the bottom of the charge melting equipment design and construction, which is used to produce high quality heavy metal fluoride glass. Sheng glassy carbon melt fused quartz crucible placed in the container, the latter through the resistance heating tube furnace. Quartz tube is that it is not representative of most play a role in the reaction gas. This device can not be used in the Ns for the RAP compounds. However, if using induction heating (ie, direct heating crucible), this shortcoming can be overcome. The atmosphere of the container is tightly controlled in order to dry He (<1ppmH2O) and cl2 to provide a oxidizing atmosphere. t use the computer-controlled melting temperature of the various stages of the process. The system heated by the crucible out of the melt zone to achieve a sealed container in the rapid quenching. The system we used the conventional melting a charge of ZAN 250 grams of glass, to obtain a transparent broken glass. 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