A method of improving strength and windability of zirconia continuous fibers
A technology of continuous fiber and zirconia, which is applied in the field of inorganic non-metallic oxide fiber materials, can solve the problems of insufficient windability and poor winding performance of continuous fiber of zirconia, which is beneficial to classification, improved mechanical properties, The effect of improving mechanical properties
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[0055] (1) Preparation of polyacetylacetonate zirconium precursor
[0056] ①Weigh 100g of zirconium oxychloride ZrOCl 2 ·8H 2 O, dissolve in absolute ethanol according to the ratio of zirconium oxychloride: absolute ethanol = 100g: 640g, and measure the acetyl group according to the molar ratio of zirconium oxychloride: acetylacetone: triethylamine = 1:2.0:2.0 31.1g of acetone and 60.9g of triethylamine, first slowly add acetylacetone to the ethanolic solution of zirconium oxychloride, stir well to form a mixed solution; Ethylamine: 160 g ethanol) was slowly added to the above mixed solution, fully reacted and stirred for 2 hours to obtain a golden yellow reaction solution, that is, a solution containing polyacetylacetonate zirconium.
[0057] ②At a temperature of 40~45℃ and a vacuum degree of 0.09MPa, the solvent ethanol and water were removed by concentration under reduced pressure until a light yellow powder was obtained, and acetone was added according to the ratio of zi...
Example Embodiment
[0066] Example 1:
[0067] A method for improving the strength and spoolability of zirconia continuous fibers, comprising the steps of:
[0068] The zirconia continuous fibers were quickly entered into a high temperature zone of 1300 °C, the residence time in the high temperature zone was 2 s, and the tension was applied at 50 cN, and then the fibers were directly cooled at room temperature. The tensile strength of the monofilament fiber was measured to be around 1.5GPa. SEM photos such as figure 2 As shown, the grain distribution diagram is as follows image 3 shown. Depend on figure 2 , 3 It can be seen that after the treatment in this example, the fibers are dense and uniform, and the fiber grain size is small, mainly distributed in 80-100 nm.
[0069] The zirconia continuous fibers cooled to room temperature were wound in an orderly manner, the winding line speed was controlled to be 1000mm / min, the tension was 150cN, and the fiber rolls were ordered and had a cert...
Example Embodiment
[0070] Example 2:
[0071] As described in Example 1, the difference is that the zirconia continuous fibers are quickly entered into a high temperature zone of 1400°C, the residence time in the high temperature zone is 10s, and the applied tension is 100cN, and then the fibers are directly cooled at room temperature. The measured tensile strength of monofilament fibers is about 2.0GPa, and the highest is 3.0GPa.
[0072] The zirconia continuous fibers cooled to room temperature were wound in an orderly manner, the winding line speed was controlled to be 2000mm / min, the tension was 250cN, and the fiber rolls were orderly and tightly arranged.
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