High-purity niobium-added strontium titanate powder washing equipment and preparation method

Abstract

The invention relates to the technical field of niobium strontium titanate powder preparation, and discloses high-purity niobium strontium titanate powder washing equipment and a preparation method.The high-purity niobium strontium titanate powder washing equipment comprises a washing kettle, a mounting frame is arranged in an inner cavity of the washing kettle, a through hole is formed in the mounting frame, a movable rod is arranged on the inner side of the mounting frame, and the inner cavity of the washing kettle is provided with a through hole; an auger blade is arranged on the outer wall of the movable rod, and a lifting mechanism used for driving the auger blade to vertically move is arranged at the top of the movable rod. According to the washing equipment for the high-purity niobium-added strontium titanate powder, when the washing kettle starts washing operation, the lifting mechanism drives the movable rod and the auger blade to rotate and stir and vertically move at the same time, and the powder with different heights can be fully stirred in the lifting process of the auger blade. In the stirring process, the auger blades move up and down to exchange the powder on the upper layer and the powder on the lower layer, so that the powder in the whole washing kettle can be in uniform contact with water, and agglomeration of local powder due to insufficient stirring is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of strontium niobium titanate powder preparation, and particularly relates to a high-purity strontium niobium titanate powder water washing device and a preparation method thereof. Background Art

[0002] Strontium niobium titanate powder, in terms of chemical composition, is a doping system formed by introducing niobium (Nb) element into the matrix of strontium titanate (SrTiO3). Its chemical formula can be expressed as SrTiO3:Nb, where niobium atoms replace part of the titanium atom positions in a specific proportion. Doping with niobium element significantly improves the electrical properties of the material, which enables it to exhibit good electrical conductivity in some cases and can be used as a special electronic conductor. The main purpose of water washing strontium niobium titanate powder is to remove the impurity ions attached to the powder surface, such as the unreacted precursor ions and reaction by-product ions introduced during the synthesis process, so as to highlight its dielectric properties.

[0003] Currently, the most basic and widely used water washing method is the stirring water washing method. During operation, the synthesized strontium niobium titanate powder is placed in a deionized water container, and a mechanical stirring device, such as a magnetic stirrer or an electric stirrer, is used to stir at a moderate speed. Through stirring, the powder is evenly dispersed in water, and the impurity ions gradually detach from the powder surface under the dissolution action of water. This method has simple equipment requirements and low cost.

[0004] Due to the certain surface activity of strontium niobium titanate powder, during the water washing process using the conventional stirring water washing method, as the stirring progresses, the probability of mutual collision between powder particles increases, and the charge distribution on the particle surface is uneven during stirring, which will cause the attraction between particles to be greater than the repulsion force, thus triggering large-scale agglomeration phenomena. The agglomerated powder is not conducive to the full elution of impurity ions and is difficult to redisperse during the subsequent drying process, affecting the uniformity and performance of the powder. Summary of the Invention

[0005] In view of the problems existing in the above-mentioned prior art, the present invention is proposed.

[0006] The present application provides a high-purity strontium niobium titanate powder water washing device and a preparation method thereof, and the purpose is to solve the problem that during the water washing process of strontium niobium titanate powder, large-scale agglomeration phenomena are easily caused as the stirring progresses, affecting the uniformity and performance of the powder.

[0007] The technical solution of the present invention is: a high-purity strontium niobium titanate powder water washing device, including a water washing kettle. An installation frame is arranged in the inner cavity of the water washing kettle, and through holes are opened in the installation frame. A movable rod is arranged inside the installation frame. A screw blade is arranged on the outer wall of the movable rod. A lifting mechanism for driving the screw blade to move vertically is arranged at the top of the movable rod. An auxiliary mechanism for assisting the screw blade to disperse is arranged outside the movable rod.

[0008] Further, the lifting mechanism includes a driving motor fixedly installed on the outer side of the water washing kettle. The output end of the driving motor is fixedly installed with a rotating rod, and a plurality of protruding parts are annularly arranged at one end of the rotating rod far away from the driving motor with its axis. A disc is arranged at the top end of the movable rod, and the disc is inclined;

[0009] A plurality of spherical protrusions are annularly arranged on the outer wall of the disc with its axis, and the spherical protrusions are engaged with the protruding parts.

[0010] Further, the auxiliary mechanism includes a horizontal rod arranged on the outer wall of the movable rod. Sliding rods are arranged at both ends of the horizontal rod. A first arc-shaped strip is arranged between the two sliding rods, and the end part of the first arc-shaped strip is slidably sleeved on the sliding rod.

[0011] Further, the first arc-shaped strips are two symmetrically arranged ones. A reset part is connected between the end part of each first arc-shaped strip and the sliding rod, and the reset part is in a natural state when the movable rod does not rotate.

[0012] Further, a scraping strip is integrally formed and connected to the outer wall of the first arc-shaped strip, and the tip of the scraping strip faces the inner wall of the water washing kettle. A second arc-shaped strip is arranged at the bottom end of the scraping strip, and the two second arc-shaped strips are symmetrically arranged.

[0013] Further, a feed inlet is arranged on the wall body of the water washing kettle. An anti-blocking mechanism for dredging the powder in the feed inlet is arranged in the inner cavity of the water washing kettle. The anti-blocking mechanism includes a rotating cylinder arranged on the inner top wall of the water washing kettle through a bearing. A transmission rod is arranged on the top of the disc.

[0014] Further, the axis of the transmission rod coincides with the axis of the rotating cylinder, and the top end of the transmission rod extends to the inner side of the rotating cylinder. A vertical sliding groove is opened on the inner wall of the rotating cylinder. A sliding block is arranged at the top end of the transmission rod, and the sliding block is slidably connected in the vertical sliding groove.

[0015] Further, a main gear is arranged on the outer wall of the rotating cylinder. A sub-gear is meshed on one side of the main gear. The sub-gear is rotatably connected to the inner wall of the water washing kettle through a connecting rod. An eccentric disc is arranged at the bottom of the sub-gear. A material scattering claw is arranged at the bottom edge of the eccentric disc through a rotating shaft.

[0016] Further, a horizontal sliding groove is arranged inside the feed inlet. A limiting block is arranged on the outer wall of the material scattering claw, and the limiting block is slidably connected in the horizontal sliding groove.

[0017] Further, the present application also provides a preparation method for high-purity niobium-added strontium titanate powder, including the following steps:

[0018] Add an appropriate amount of deionized water into the water washing kettle, turn on the driving motor, and add the ground strontium niobate titanate powder into the water washing kettle;

[0019] The rotation of the disc causes the spreading claws to perform reciprocating linear motion in the horizontal sliding groove, stirring and dispersing the powder in the feeding port;

[0020] The protruding part on the rotating rod meshes with the spherical protrusion on the outer wall of the disc, thereby driving the movable rod and the auger blade to perform both rotational stirring motion and vertical lifting motion in the water washing kettle;

[0021] At the same time, under the action of centrifugal force, the first arc-shaped strip slides outward along the sliding rod against the pulling force of the reset part, and the second arc-shaped strip moves synchronously, capable of performing a stirring and dispersing operation on the strontium niobate titanate powder in a wider area inside the water washing kettle.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] In the present invention, when the water washing kettle starts the water washing operation, the lifting mechanism drives the movable rod and the auger blade to rotate and stir while performing vertical movement, and the powders at different heights can be fully stirred during the lifting process of the auger blade. During the stirring process, the up and down movement of the auger blade can exchange the powders in the upper layer and the lower layer, enabling the powders in the entire water washing kettle to uniformly contact with water, and avoiding the agglomeration of local powders due to insufficient stirring. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0025] Figure 1 is the overall structural schematic diagram of the embodiment of the present invention;

[0026] Figure 2 is the sectional structural schematic diagram of the water washing kettle of the embodiment of the present invention;

[0027] Figure 3 is the structural schematic diagram of the disc of the embodiment of the present invention;

[0028] Figure 4 is the embodiment of the present invention Figure 3 is the enlarged partial structural schematic diagram at A in the embodiment;

[0029] Figure 5 is the structural schematic diagram when the movable rod rises in the embodiment of the present invention;

[0030] Figure 6Schematic diagram of the partial sectional structure of the embodiment of the present invention;

[0031] Figure 7 Schematic diagram of the structure of the auxiliary gear in the embodiment of the present invention;

[0032] Figure 8 Schematic diagram of the structure of the bulk material claw in the embodiment of the present invention.

[0033] The reference numerals in the figure respectively represent: 1, water washing kettle; 2, mounting rack; 3, movable rod; 4, auger blade; 5, lifting mechanism; 51, driving motor; 52, rotating rod; 53, extending part; 54, disc; 55, spherical protrusion; 6, auxiliary mechanism; 61, horizontal rod; 62, sliding rod; 63, first arc-shaped strip; 64, reset member; 65, scraping strip; 66, second arc-shaped strip; 7, feed inlet; 8, anti-blocking mechanism; 81, rotating cylinder; 82, transmission rod; 83, vertical chute; 84, slider; 85, main gear; 86, auxiliary gear; 87, eccentric disc; 88, rotating shaft; 89, bulk material claw; 810, horizontal chute; 811, limiting block. Detailed implementation manners

[0034] In order to make the invention purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the embodiments described below are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] The present invention will be further described below with reference to the embodiments.

[0036] Embodiment 1, refer to Figure 1 - Figure 3 , which is the first embodiment of the present invention, provides a high-purity niobium-doped strontium titanate powder water washing device, including a water washing kettle 1. An inner cavity of the water washing kettle 1 is welded or fixedly installed with a mounting rack 2, and a through hole is formed in the mounting rack 2. A movable rod 3 is rotatably installed inside the mounting rack 2. An auger blade 4 is arranged on an outer wall of the movable rod 3. A lifting mechanism 5 for driving the auger blade 4 to move vertically is installed at a top of the movable rod 3. An auxiliary mechanism 6 for assisting in dispersing the auger blade 4 is installed outside the movable rod 3.

[0037] Specifically, the lifting mechanism 5 can be a hydraulic lifting component combined with a servo motor. A hydraulic cylinder is installed on the top or side of the water washing kettle 1, and the telescopic rod of the hydraulic cylinder is connected to the top of the servo motor. The servo motor drives the movable rod 3 and the auger blade 4 to rotate. The telescopic movement of the hydraulic cylinder is controlled by the hydraulic system, driving the servo motor, the movable rod 3, and the auger blade 4 to lift; the hydraulic lifting component can provide a large thrust and is suitable for a heavier auger blade 4 and a larger lifting stroke. The auxiliary mechanism 6 can be to install a plurality of rotating blades on the movable rod 3, and the inclination angle of the blades is different from that of the auger blade 4; when the movable rod 3 rotates, the rotating blades stir the material at different positions, enhancing the dispersing effect and making the material fully mixed with water.

[0038] Currently, the most basic and widely used water washing method is the stirring water washing method. During operation, the synthesized niobium-added strontium titanate powder is placed in the water washing kettle 1, and a mechanical stirring device such as a magnetic stirrer or an electric stirrer is used to stir at a moderate speed. Through stirring, the powder is evenly dispersed in water, and impurity ions gradually detach from the surface of the powder under the dissolution action of water. This method has simple equipment requirements and low costs.

[0039] Due to the certain surface activity of the niobium-added strontium titanate powder, during the water washing process using the conventional stirring water washing method, as the stirring progresses, the probability of mutual collision between powder particles increases, and the charge distribution on the particle surface is uneven during stirring, which will cause the attraction between particles to be greater than the repulsion force, thus triggering large-scale agglomeration phenomena. The agglomerated powder is not conducive to the full elution of impurity ions and is difficult to redisperse during the subsequent drying process, affecting the uniformity and performance of the powder.

[0040] Specifically, during the conventional stirring water washing process, if the position of the auger blade 4 is fixed, the powder is likely to form a relatively stable agglomeration environment in a specific area. When the water washing kettle 1 starts the water washing operation, the lifting mechanism 5 drives the movable rod 3 and the auger blade 4 to rotate and stir while moving vertically. The powder at different heights can be fully stirred during the lifting process of the auger blade 4. During the stirring process, the up and down movement of the auger blade 4 can exchange the powder in the upper and lower layers, enabling the powder in the entire water washing kettle 1 to uniformly contact water and avoiding the agglomeration of local powder due to insufficient stirring.

[0041] Refer to Figure 2 and Figure 3 As shown in [relevant figure number] and [relevant figure number], the lifting mechanism 5 includes a driving motor 51 fixedly installed on the outside of the water washing kettle 1 through a fixing frame. The output end of the driving motor 51 is fixedly installed with a rotating rod 52, and a plurality of protruding parts 53 are annularly connected to the end of the rotating rod 52 far from the driving motor 51 with its axis. The top end of the movable rod 3 is fixedly installed with a disc 54, and the disc 54 is inclined; a plurality of spherical protrusions 55 are annularly installed on the outer wall of the disc 54 with its axis, and the spherical protrusions 55 are engaged with the protruding parts 53.

[0042] Specifically, the rotating rod 52 rotates driven by the driving motor 51, and drives the protruding part 53 to perform a circular motion around the axis of the rotating rod 52. The protruding part 53 will successively contact and push different spherical protrusions 55. Since the disc 54 is inclined, when the protruding part 53 pushes the spherical protrusion 55, this pushing effect will be decomposed into two component forces: one is the tangential component force along the circumferential direction of the disc 54, and the other is the axial (i.e., vertical direction) component force along the disc 54, thereby driving the auger blade 4 to perform both rotational stirring motion and vertical lifting motion in the water-washing kettle 1, effectively solving the problem of agglomeration of niobium-strontium titanate powder during the water-washing process and improving the water-washing effect.

[0043] Refer to Figure 3 and Figure 4 As shown in FIGS.

[0044] Specifically, the auxiliary mechanism 6 includes a horizontal rod 61 welded or fixedly installed on the outer wall of the movable rod 3. Slide rods 62 are fixedly installed at both ends of the horizontal rod 61. A first arc-shaped strip 63 is arranged between the two slide rods 62, and the end of the first arc-shaped strip 63 is slidably sleeved on the slide rod 62; there are two symmetrically arranged first arc-shaped strips 63, and a reset member 64 is connected between the end of the first arc-shaped strip 63 and the slide rod 62. The reset member 64 is in a natural state when the movable rod 3 does not rotate; a scraping strip 65 is integrally formed and connected to the outer wall of the first arc-shaped strip 63, and the tip of the scraping strip 65 faces the inner wall of the water-washing kettle 1. A second arc-shaped strip 66 is welded to the bottom end of the scraping strip 65, and the two second arc-shaped strips 66 are symmetrically arranged.

[0045] Specifically, the horizontal rod 61 fixed to the outer wall of the movable rod 3 will rotate with it, and the slide rods 62 at both ends of the horizontal rod 61 also perform circular motion accordingly. Since the end of the first arc-shaped strip 63 is slidably sleeved on the slide rod 62, under the action of centrifugal force, the first arc-shaped strip 63 will overcome the pulling force of the reset member 64 and slide outward along the slide rod 62, increasing the radius enclosed by the first arc-shaped strip 63, and the second arc-shaped strip 66 will also move synchronously to further disperse the niobium-strontium titanate powder in the bottom area of the water-washing kettle 1, enabling the niobium-strontium titanate powder in a wider area in the water-washing kettle 1 to be dispersed, enhancing the stirring effect and reducing the stirring dead angle.

[0046] Specifically, as the first arc-shaped strip 63 unfolds towards the inner wall of the water-washing kettle 1, the scraping strip 65 will gradually approach the inner wall of the water-washing kettle 1; the tip of the scraping strip 65 faces the inner wall of the water-washing kettle 1. When the movable rod 3 continues to rotate, the scraping strip 65 will perform a circular motion along the inner wall of the water-washing kettle 1; scraping the powder adhering to the inner wall to prevent the powder from accumulating on the kettle wall to form lumps, ensuring the cleanliness of the inner wall of the water-washing kettle 1. At the same time, this part of the adhering powder also returns to the washing liquid and participates in the washing process, improving the washing efficiency and the powder recovery rate.

[0047] Example 2, refer to Figure 1 - Figure 8 , which is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: a feed port 7 is provided on the wall body of the water-washing kettle 1, and an anti-blocking mechanism 8 for dredging the powder in the feed port 7 is installed in the inner cavity of the water-washing kettle 1. The anti-blocking mechanism 8 includes a rotating cylinder 81 rotatably installed on the inner top wall of the water-washing kettle 1 through a bearing, and a transmission rod 82 is fixedly installed on the top of the disc 54; the axis of the transmission rod 82 coincides with the axis of the rotating cylinder 81, and the top end of the transmission rod 82 extends to the inner side of the rotating cylinder 81. A vertical chute 83 is provided on the inner wall of the rotating cylinder 81, and a slider 84 is fixedly installed at the top end of the transmission rod 82, and the slider 84 is slidably connected in the vertical chute 83.

[0048] Specifically, when the disc 54 drives the transmission rod 82 to perform a vertical upward or downward movement, the slider 84 at the top end of the transmission rod 82 will slide along the chute direction in the vertical chute 83, and the rotating cylinder 81 will rotate around its own axis. No matter what height the disc 54 is at, it can ensure that the rotating cylinder 81 rotates stably to achieve the anti-blocking function, which has good adaptability to the operation of the equipment under different working conditions.

[0049] Refer to Figure 6 and Figure 7 , a main gear 85 is fixedly sleeved on the outer wall of the rotating cylinder 81, a secondary gear 86 is meshed on one side of the main gear 85, the secondary gear 86 is rotatably connected to the inner wall of the water-washing kettle 1 through a connecting rod, and an eccentric disc 87 is fixedly installed at the bottom of the secondary gear 86. A material-scattering claw 89 is rotatably installed at the bottom edge of the eccentric disc 87 through a rotating shaft 88; a horizontal chute 810 is provided inside the feed port 7, and a limiting block 811 is connected to the outer wall of the material-scattering claw 89, and the limiting block 811 is slidably connected in the horizontal chute 810.

[0050] Specifically, when the main gear 85 rotates, its teeth will push the teeth of the secondary gear 86, so that the secondary gear 86 rotates in a circular motion around its own rotation center (that is, the rotation point connected to the inner wall of the water-washing kettle 1 through the connecting rod). By designing the tooth number ratio of the main gear 85 and the secondary gear 86 according to the actual situation, different speed and torque conversions can be achieved to meet the working needs of the material-scattering claw 89.

[0051] Specifically, the eccentric disk 87 rotates with the pinion 86. When the eccentric disk 87 performs eccentric circular motion, the limit block 811 is limited and guided in the horizontal chute 810, so that the bulk claw 89 can only perform reciprocating linear motion along the horizontal chute 810 in the horizontal direction, which can effectively stir and disperse the strontium titanate niobate powder in the feed port 7, break up the agglomerated powder, and allow the powder to enter the water washing kettle 1 evenly and smoothly through the feed port 7, thereby preventing the feed port 7 from being blocked and ensuring the stability and continuity of the entire water washing kettle 1 feeding process. The remaining structure is the same as that of Example 1.

[0052] Example 3, reference Figure 1 - Figure 8 , as a third embodiment of the present invention, provides: a method for preparing high-purity strontium niobate titanate powder, comprising the following steps:

[0053] S1, raw material preparation: accurately weigh the pre-treated compound raw materials containing niobium, titanium and strontium to ensure that their purity meets the requirements for preparing high-purity strontium niobate titanate powder, and fully mix the weighed raw materials. Mechanical grinding or ball milling can be used for mixing to make the raw materials evenly dispersed at the microscopic level, laying a good foundation for subsequent reactions.

[0054] S2, synthesis reaction: transfer the mixed raw materials to a high temperature reaction device (such as a high temperature sintering furnace) and carry out a solid phase synthesis reaction under set high temperature conditions, usually 1200-1400°C. During the reaction, the heating rate, holding time and cooling rate need to be controlled according to actual conditions. For example, the heating rate is increased to the reaction temperature at a rate of 5-10°C / min and kept at this temperature for 3-5 hours to allow the raw materials to fully react to generate a strontium titanate precursor with niobium. Subsequently, the temperature is cooled to room temperature at a cooling rate of 3-5°C / min to obtain a bulk crude strontium titanate with niobium.

[0055] S3, crushing and grinding: The blocky crude strontium titanate with niobium is initially crushed by a jaw crusher and other equipment to reduce its particle size to a size that is convenient for subsequent grinding. Then, the crushed material is further ground by a ball mill and other grinding equipment to process it into a powder state. An appropriate amount of dispersant, such as polyvinyl alcohol (PVA) aqueous solution, can be added during the grinding process to prevent the powder from agglomerating during the grinding process, improve the grinding efficiency and the dispersibility of the powder. By controlling parameters such as grinding time and ball-to-material ratio, the powder particle size is controlled within an appropriate range (generally micrometer level).

[0056] S4. Add an appropriate amount of deionized water into the water washing kettle 1 until the water level reaches 60%-80% of the effective volume of the water washing kettle 1. Then start the driving motor 51 and slowly add the ground strontium titanate powder doped with niobium into the water washing kettle 1 through the feed inlet 7. During the feeding process, the rotation of the rotating cylinder 81 makes the spreading claws 89 move in a reciprocating linear motion within the horizontal chute 810, stirring and dispersing the powder in the feed inlet 7 to prevent the powder from accumulating and blocking at the feed inlet 7, ensuring that the powder enters the water washing kettle 1 evenly and smoothly.

[0057] S5. The driving motor 51 drives the rotating rod 52 to rotate. The protruding part 53 on the rotating rod 52 meshes with the spherical protrusion 55 on the outer wall of the disc 54, causing the disc 54 to rotate and lift, thereby driving the movable rod 3 and the auger blade 4 to perform both rotational stirring motion and vertical lifting motion within the water washing kettle 1. At the same time, the horizontal rod 61 fixed to the outer wall of the movable rod 3 drives the sliding rod 62 to perform a circular motion. The first arc-shaped strip 63 slides outward along the sliding rod 62 under the action of centrifugal force, overcoming the pulling force of the reset member 64, and the second arc-shaped strip 66 moves synchronously to further disperse the powder in the bottom area of the water washing kettle 1.

[0058] S6. The scraping strip 65 moves in a circular motion along the inner wall of the water washing kettle 1 to scrape off the powder adhering to the inner wall and make it return to the washing liquid again. During the stirring and washing process, by adjusting the rotation speed of the driving motor 51, control the stirring speed of the auger blade 4 to be 100 - 300 r / min, and the stirring time to last for 30 - 60 minutes, so that the impurity ions in the powder can be fully separated from the powder surface under the dissolution action of water, achieving the purpose of washing and removing impurities.

[0059] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A high-purity strontium niobate titanate powder washing device, comprising a washing kettle (1), characterized in that: The inner cavity of the water washing kettle (1) is provided with a mounting frame (2), and a through hole is opened in the mounting frame (2), a movable rod (3) is provided on the inner side of the mounting frame (2), an auger blade (4) is provided on the outer wall of the movable rod (3), a lifting mechanism (5) for driving the auger blade (4) to move vertically is provided on the top of the movable rod (3), and an auxiliary mechanism (6) for assisting the auger blade (4) to disperse is provided on the outer side of the movable rod (3).

2. The high-purity strontium niobate titanate powder washing equipment according to claim 1 is characterized in that: The lifting mechanism (5) comprises a driving motor (51) fixedly mounted on the outside of the washing kettle (1); a rotating rod (52) is fixedly mounted on the output end of the driving motor (51); and a plurality of protruding parts (53) are arranged in a ring shape on the axis of the rotating rod (52) at one end away from the driving motor (51); and a disc (54) is arranged at an angle at the top end of the movable rod (3); A plurality of spherical protrusions (55) are arranged in a ring shape on the outer wall of the disc (54) along its axis, and the spherical protrusions (55) are meshed with the protruding portion (53).

3. The high-purity strontium niobate titanate powder washing equipment according to claim 2 is characterized in that: The auxiliary mechanism (6) comprises a horizontal rod (61) arranged on the outer wall of the movable rod (3), and sliding rods (62) are arranged at both ends of the horizontal rod (61). A first arc strip (63) is arranged between the two sliding rods (62), and the end of the first arc strip (63) is slidably sleeved on the sliding rod (62).

4. The high-purity strontium niobate titanate powder washing equipment according to claim 3 is characterized in that: There are two first arc-shaped strips (63) symmetrically arranged, and a reset member (64) is connected between the end of each first arc-shaped strip (63) and the slide bar (62). The reset member (64) is in a natural state when the movable rod (3) is not rotated.

5. The high-purity strontium niobate titanate powder washing equipment according to claim 4 is characterized in that: A scraper strip (65) is integrally formed and connected to the outer wall of the first arc-shaped strip (63), and the tip of the scraper strip (65) faces the inner wall of the washing kettle (1). A second arc-shaped strip (66) is arranged at the bottom end of the scraper strip (65), and the two second arc-shaped strips (66) are symmetrically arranged.

6. The high-purity strontium niobate titanate powder washing equipment according to claim 5 is characterized in that: The wall of the water washing kettle (1) is provided with a feed port (7), and the inner cavity of the water washing kettle (1) is provided with an anti-blocking mechanism (8) for clearing the powder in the feed port (7). The anti-blocking mechanism (8) comprises a rotating cylinder (81) arranged on the inner top wall of the water washing kettle (1) via a bearing, and a transmission rod (82) is arranged on the top of the disc (54).

7. The high-purity strontium niobate titanate powder washing equipment according to claim 6 is characterized in that: The transmission rod (82) coincides with the axis of the rotating cylinder (81), and the top end of the transmission rod (82) extends to the inner side of the rotating cylinder (81). A vertical sliding groove (83) is provided on the inner wall of the rotating cylinder (81). A sliding block (84) is provided at the top end of the transmission rod (82), and the sliding block (84) is slidably connected in the vertical sliding groove (83).

8. The high-purity strontium niobate titanate powder washing equipment according to claim 7 is characterized in that: A main gear (85) is arranged on the outer wall of the rotating cylinder (81), a sub-gear (86) is meshed with one side of the main gear (85), the sub-gear (86) is rotatably connected to the inner wall of the washing kettle (1) via a connecting rod, an eccentric disk (87) is arranged at the bottom of the sub-gear (86), and a bulk material claw (89) is arranged at the bottom edge of the eccentric disk (87) via a rotating shaft (88).

9. The high-purity strontium niobate titanate powder washing equipment according to claim 8, characterized in that: A horizontal slide groove (810) is arranged on the inner side of the feed port (7), and a limit block (811) is arranged on the outer wall of the bulk material claw (89), and the limit block (811) is slidably connected in the horizontal slide groove (810).

10. A method for preparing high-purity strontium titanate niobate powder, based on the high-purity strontium titanate niobate powder washing equipment as claimed in claim 9, characterized in that: The following steps are involved: Add an appropriate amount of deionized water into the water washing kettle (1), turn on the drive motor (51), and add the ground strontium titanate niobate powder into the water washing kettle (1); The rotation of the disc (54) causes the bulk material claw (89) to perform reciprocating linear motion in the horizontal chute (810), thereby stirring and dispersing the powder in the feed port (7); The extension (53) on the rotating rod (52) meshes with the spherical protrusion (55) on the outer wall of the disc (54), thereby driving the movable rod (3) and the auger blade (4) to perform both rotational stirring motion and vertical lifting motion in the washing kettle (1); At the same time, the first arc strip (63) overcomes the pulling force of the reset member (64) under the action of centrifugal force and slides outward along the slide rod (62), and the second arc strip (66) moves synchronously, so as to stir and disperse the strontium niobate titanate powder in a wider area in the washing kettle (1).

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