Development of Oxygen Semipermeable Membrane Using Mixed Conductive Perovskite-Type Oxide

对于使用混合性全氧基型氧化物类型的氧化物的半有效膜的开发，研究了材料搜索，对混合性的评价和实用性设备的制造。基于LnCoO_3的过氧化物类型的21个序列--氧化物已准备就绪，其氧化物半功能已被测试了系统，并被列为A和B站点的部分替代品。Among them，La_<0.6>Sr_<0.4>Co_<0.8>B'_<0.2>O_3（B'=Cu， Ni），Gd_<0.6>Sr_<0.4>CoO_3，La_<0.2>Sr_<0.8>Co_<0.8>Fe_<0.8>O_3 and Gd_<0.2>Ba_<0.8>Co_<0.7>Cu_<0.2>Fe_<0.1>O_3 showed an excellent oxygen semipermeability and they were found to be suitable for the oxygen semipermeable membrane。通过这种方式，La_&lt;1-x&gt; Sr_XCo_&lt;1-r&gt;Fe_yO_3找到了良好的混合行为，通过四个探测器电离直流和常规四个探测器直流技术的含义来显示良好的混合行为。<0.6>La_Sr_CoO_3<0.4>（LSCO）用于实践设备。对LSCO Pow紧凑型紧凑型的三种方法的研究 ... More 其中的一个是在1400 ° C的温度下进行的，并被捕获到44-74毫米厚的磁盘具有高的空气渗透性，通过一个由一个跨粒度的端口网络组成的渗透通道。光盘似乎是合适的，因为它是由氧气半薄薄膜制成的，提供了大量的支持。在少量支持上密集的薄薄膜的准备是通过使用喷雾沉积物实现的-技术一致性的技术保证在空气中喷洒一个精细的LSCO颗粒和一个接口，用于1小时的乙醇悬挂。在每一次喷洒2.0毫克/厘米^2的LSCO和1400 ° C的条件下，在重复过程后发现的沉积层的开放端口和大约15毫米厚的几乎完全密集的重叠层在4次后出现。该薄膜设备由高于过程的过程制造，显示出较高的氧半度，高于密度为1.5毫米的插入光盘的厚度，也高于预期的速率。对电影表面的化学成分的控制，由于对底层开放的纸张的分歧，建议对进一步的修订具有重要意义。Less（低）

For the development of an oxygen semipermeable membrane using mixed conductive perovskite-type oxides, investigated were the material searching, the evaluation of mixed conductivity and the fabrication of pracical device. 21 sorts of LnCoO_3 based perovskite-type oxides were prepared and their oxygen semipermeabilities were examined systematcally with regard to a partial substitution of A and B site cations. Among them, La_<0.6>Sr_<0.4>Co_<0.8>B'_<0.2>O_3 (B'=Cu, Ni), Gd_<0.6>Sr_<0.4>CoO_3, La_<0.2>Sr_<0.8>Co_<0.8>Fe_<0.8>O_3 and Gd_<0.2>Ba_<0.8>Co_<0.7>Cu_<0.2>Fe_<0.1>O_3 showed an excellent oxygen semipermeability and they were found to be suitable for the oxygen semipermeable membrane. By the way, La_<1-x>Sr_XCo_<1-r>Fe_yO_3 was found to show a good mixed conductivity by means of four probe ionic dc and ordinary four-probe dc techniques. La_<0.6>Sr_<0.4>CoO_3 (LSCO) was used for the fabrication of practical device. Of the several methods attempted, sintering of a compact of LSCO pow … More der which was calcined at 1400 ゜C and sieved to 44-74 mum gave discs having a high air permeability through penetrating channels consisting of a network of intergranular pores. The disc appeared to be suitable as a porous support on which oxygen semipermeable thin membrane was formed. The preparation of dense thin membrane on the porous support was achieved by using a spray deposition-technique consisted of a repetition of sprying an ethanol suspension of fine LSCO particles and sintering for 1h in air. Under the condition of 2.0 mg/cm^2 of LSCO per one spray and 1400 ゜C for sintering, the open pores of porous support were progressively covered with the deposited layer with repeating the procedure and the almost completely dense overlayer of about 15 mum thickness was obtained after repetition by four times. The thin film device fabricated by above-mentioned procedure showed a higher rate of oxygen semipermeation than that of the dense sintered disc with the thickness of 1.5 mm, although the rate was lower than was expected. Control of the chemical composition at the film surface as well as the dispersion of open pores of the substrate was suggested to be important for further revisions. Less