Rutile-form titanium oxide crystals and mid-infrared filter including same
A rutile type, titanium oxide technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, chemical instruments and methods, etc., can solve the problem of not being able to display wavelength selectivity
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Embodiment 1
[0085] Example 1 [Synthesis of 1-Ti-Mn500 doped with manganese ions]
[0086] Add 0.93ml 0.1M Mn(NO 3 ) 2 , Prepare a complex solution of polyethyleneimine / manganese ions (liquid A, the molar ratio of imine / Mn is 500). On the other hand, 28% ammonia water was added dropwise to a solution of titanium lactate (manufactured by Matsumoto Pharmaceutical Co., Ltd., TC310, 20 vol%) to prepare an aqueous solution (liquid B) of pH=9. Take 100ml of liquid B, and slowly add 10ml of liquid A dropwise while stirring at room temperature (25°C). After about one hour, many precipitates were formed from the mixed solution. This precipitate was filtered, washed with water, and dried at room temperature to obtain 8.2 g of a light yellow powder (precursor). From the XRD pattern of the precursor powder, a strong X-ray diffraction peak representing a layered structure appeared on the low angle (2θ is about 3.8°) side ( figure 1 ). That is, the precursor is a complex having a layered structur...
Embodiment 2
[0089] Example 2 [Synthesis of titanium oxide 2-Ti-Mn500 doped with manganese ions]
[0090] 2-Ti-Mn500 was produced in the same manner as in Example 1 except that the firing temperature was changed to 1100°C. The FT-IR spectrum of the thin slice made by mixing this sample (5%) with KBr is as follows Figure 5 shown. By increasing the firing temperature, the infrared transmission peak tends to shift slightly to the short-wavelength side. The center wavelength is 9.46 μm, the half value width is 1.89, and the transmittance is 50%.
Embodiment 3
[0091] Example 3 [Synthesis of titanium oxide doped with iron ions]
[0092] Using Fe(NO 3 ) 3 Instead of the Mn(NO 3 ) 2 (In the polymer metal complex, the molar ratio of ethyleneimine / iron = 1 / 25, 1 / 200, 1 / 500), the precursor synthesis and air calcination (800°C) were carried out under the same conditions to obtain Rutile-type titanium oxide doped with iron ions. Table 1 shows 3 kinds of titanium oxides with different iron doping amounts (iron ion content is as Fe 2 o 3 when converted value).
[0093] [Table 1]
[0094]
[0095] It was confirmed by XRD measurement that these three kinds of titanium oxides were crystals consistent with the rutile structure. In addition, the FT-IR spectrum of each sample (5% in KBr) is as follows Figure 6 shown. It shows that the larger the Fe doping amount, the more the infrared transmittance tends to increase, but at the same time the transmission peak width also becomes wider.
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