Microwave treatment method for pressure-transmitting and heat-preserving medium

Abstract

The invention belongs to the technical field of heat preservation medium microwave treatment, and particularly relates to a pressure transmission heat preservation medium microwave treatment method, which comprises a microwave oven body, an inner layer crucible and gel fibers, the bottom end in the microwave oven body is fixedly connected with a rotary heat preservation box, and the bottom end in the rotary heat preservation box is fixedly connected with a motor; a first gear is fixedly connected to the output end of the motor, a rotating shaft is rotationally connected to the bottom end of the interior of the rotary heat preservation box through a bearing, one end of the rotating shaft rotationally penetrates through the rotary heat preservation box and is fixedly connected with a rotating frame, and a second gear is fixedly connected to the surface of the rotating shaft. The whole material can be uniformly heated at the same time, a heat conduction process is not needed, the heating rate is high, the uniformity and consistency of the material are improved, the gel fiber can keep the original form without breakage after being pre-sintered and heat-treated by the microwave oven body, and the ceramic fiber with a single perovskite phase, a flat and smooth surface and a relatively uniform structure is obtained.

Description

Technical Field

[0001] The invention belongs to the technical field of microwave treatment of heat-insulating media, and in particular relates to a microwave treatment method for a pressure-transmitting heat-insulating medium. Background Art

[0002] The traditional heat treatment method for piezoelectric ceramic fibers mainly adopts conventional heat treatment methods, which use heat conduction, thermal radiation, convection and other forms to transfer the heat generated by the heat source to the surface of the gel fiber, and then gradually increase the temperature of the fiber center through heat conduction. This heating method is not only easy to cause the inhomogeneity of the internal composition and structure of the fiber, but also has disadvantages such as increased grain size, reduced chemical activity, and increased impurity content. Summary of the invention

[0003] To solve the problems raised in the above background technology, the present invention provides a microwave treatment method for pressure transmission and heat preservation medium, which has the characteristics of fast heating rate, short time, energy saving and high efficiency, and can obtain ceramic fibers with single perovskite phase, flat and smooth surface and fine structure.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pressure-transmitting heat-insulating medium microwave processing method, comprising a microwave oven body, an inner crucible and gel fiber, the bottom end of the interior of the microwave oven body is fixedly connected to a rotating heat-insulating box, the bottom end of the interior of the rotating heat-insulating box is fixedly connected to a motor, the output end of the motor is fixedly connected to a first gear, the bottom end of the interior of the rotating heat-insulating box is rotatably connected to a rotating shaft through a bearing, one end of the rotating shaft rotates through the rotating heat-insulating box and is fixedly connected to a rotating frame, a second gear is fixedly connected to the surface of the rotating shaft, the first gear and the second gear are meshed with each other, the inner crucible is placed in the rotating frame, the gel fiber is placed in the inner crucible, the four corners of the bottom end of the microwave oven body are fixedly connected to support blocks, and the side of the microwave oven body is fixedly connected to a controller.

[0005] Preferably, the gel fiber may be one of lead zirconate titanate gel fiber, lithium niobate gel fiber, barium titanate gel fiber, lead titanate gel fiber and lead lanthanum zirconate titanate gel fiber.

[0006] Preferably, the frequency of the microwave oven body is 2450 MHz; the microwave power of pre-burning is 100-1000 W, and the pre-burning time is 10-60 min; the heat treatment is heated to 800-1100° C. at a heating rate of 3-5° C. / min and kept warm for 60-120 min.

[0007] The specific steps are as follows:

[0008] Step 1: putting the gel fiber into an inner crucible, and then putting the inner crucible containing the gel fiber into a microwave oven body for pre-burning; Step 2: heat-treating the pre-burned fiber in the microwave oven body to obtain ceramic fiber.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] 1. The present invention, by providing a microwave oven body, can heat the entire material uniformly at the same time, without the need for a heat conduction process, with a fast heating rate, and improved uniformity and consistency of the material. After the gel fiber is pre-burned and heat-treated in the microwave oven body, it can maintain its original shape without breaking, thereby obtaining a ceramic fiber with a single perovskite phase, a relatively flat and smooth surface, and a relatively fine structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0012] Figure 1 It is a structural schematic diagram of the microwave oven body in the present invention;

[0013] Figure 2 It is a structural schematic diagram of the cross section of the rotary heat preservation box in the present invention;

[0014] Figure 3 This is a schematic diagram of the surface morphology structure of the lead zirconate titanate ceramic fiber bundle pre-sintered under a microwave power of 700 W in the present invention;

[0015] Figure 4 This is a schematic structural diagram of the surface morphology of the lead zirconate titanate ceramic fiber after pre-sintering at a microwave power of 700 W and then heat-treated at 800° C. according to the present invention;

[0016] In the figure: 1, microwave oven body; 101, rotating heat preservation box; 102, motor; 103, first gear; 104, rotating shaft; 105, second gear; 106, rotating frame;

[0017] 2. Controller;

[0018] 3. Support block;

[0019] 4. Inner crucible;

[0020] 5. Gel fiber. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1

[0023] See also Figure 1-4 The present invention provides the following technical solutions: a pressure-transmitting heat-insulating medium microwave processing method, comprising a microwave oven body 1, an inner crucible 4 and a gel fiber 5, wherein a rotating heat-insulating box 101 is fixedly connected to the bottom end of the interior of the microwave oven body 1, a motor 102 is fixedly connected to the bottom end of the interior of the rotating heat-insulating box 101, a first gear 103 is fixedly connected to the output end of the motor 102, a rotating shaft 104 is rotatably connected to the bottom end of the rotating heat-insulating box 101 through a bearing, one end of the rotating shaft 104 rotates through the rotating heat-insulating box 101, and is fixedly connected to a rotating frame 106, a second gear 105 is fixedly connected to the surface of the rotating shaft 104, the first gear 103 and the second gear 105 are meshed with each other, the inner crucible 4 is placed in the rotating frame 106, the gel fiber 5 is placed in the inner crucible 4, support blocks 3 are fixedly connected to the four corners of the bottom end of the microwave oven body 1, and a controller 2 is fixedly connected to the side of the microwave oven body 1.

[0024] Specifically, the gel fiber 5 can be one of lead zirconate titanate gel fiber 5, lithium niobate gel fiber 5, barium titanate gel fiber 5, lead titanate gel fiber 5 and lead lanthanum zirconate titanate gel fiber 5.

[0025] Specifically, the frequency of the microwave oven body 1 is 2450 MHz; the pre-burning microwave power is 100-1000 W, and the pre-burning time is 10-60 min; the heat treatment is heated to 800-1100° C. at a heating rate of 3-5° C. / min, and kept warm for 60-120 min.

[0026] The specific steps are as follows:

[0027] Step 1: placing the gel fiber 5 into the inner crucible 4, and then placing the inner crucible 4 containing the gel fiber 5 into the microwave oven body 1 for pre-burning; Step 2: heat-treating the pre-burned fiber in the microwave oven body 1 to obtain ceramic fiber.

[0028] The prepared gel fiber 5 is placed in the inner crucible 4, and the inner crucible 4 containing the gel fiber 5 is placed in the microwave oven body 1, and the microwave oven body 1 and the motor 102 are controlled to operate by the controller 2. The motor 102 operates to rotate the first gear 103, and the second gear 105 can drive the rotating shaft 104 and the rotating frame 106 to rotate, so that the inner crucible 4 can be rotated, so that the inner crucible 4 can be fully heated. The microwave oven body 1 is operated, and the pre-burned fiber is pre-burned for 30 minutes under the conditions of a microwave frequency of 2450MHz and a microwave power of 700W, and then the temperature is increased to 800℃ for heat treatment at a heating rate of 5℃ / min. The obtained lead zirconate titanate ceramic fiber has a single perovskite phase, a relatively flat and smooth surface, and a relatively fine structure.

[0029] Example 2

[0030] See also Figure 1-4 The present invention provides the following technical solutions: a pressure-transmitting heat-insulating medium microwave processing method, comprising a microwave oven body 1, an inner crucible 4 and a gel fiber 5, wherein a rotating heat-insulating box 101 is fixedly connected to the bottom end of the interior of the microwave oven body 1, a motor 102 is fixedly connected to the bottom end of the interior of the rotating heat-insulating box 101, a first gear 103 is fixedly connected to the output end of the motor 102, a rotating shaft 104 is rotatably connected to the bottom end of the rotating heat-insulating box 101 through a bearing, one end of the rotating shaft 104 rotates through the rotating heat-insulating box 101, and is fixedly connected to a rotating frame 106, a second gear 105 is fixedly connected to the surface of the rotating shaft 104, the first gear 103 and the second gear 105 are meshed with each other, the inner crucible 4 is placed in the rotating frame 106, the gel fiber 5 is placed in the inner crucible 4, support blocks 3 are fixedly connected to the four corners of the bottom end of the microwave oven body 1, and a controller 2 is fixedly connected to the side of the microwave oven body 1.

[0031] Specifically, the gel fiber 5 can be one of lead zirconate titanate gel fiber 5, lithium niobate gel fiber 5, barium titanate gel fiber 5, lead titanate gel fiber 5 and lead lanthanum zirconate titanate gel fiber 5.

[0032] Specifically, the frequency of the microwave oven body 1 is 2450 MHz; the pre-burning microwave power is 100-1000 W, and the pre-burning time is 10-60 min; the heat treatment is heated to 800-1100° C. at a heating rate of 3-5° C. / min, and kept warm for 60-120 min.

[0033] The specific steps are as follows:

[0034] Step 1: placing the gel fiber 5 into the inner crucible 4, and then placing the inner crucible 4 containing the gel fiber 5 into the microwave oven body 1 for pre-burning; Step 2: heat-treating the pre-burned fiber in the microwave oven body 1 to obtain ceramic fiber.

[0035] The prepared gel fiber 5 is placed in the inner crucible 4, and the inner crucible 4 containing the gel fiber 5 is placed in the microwave oven body 1, and the microwave oven body 1 and the motor 102 are controlled by the controller 2 to operate. The motor 102 operates to rotate the first gear 103, and the second gear 105 can drive the rotating shaft 104 and the rotating frame 106 to rotate, so that the inner crucible 4 can be rotated, and the inner crucible 4 can be fully heated. The microwave oven body 1 is operated and pre-burned for 40 minutes under the conditions of a microwave frequency of 2450 MHz and a microwave power of 700 W. The pre-burned fiber is then heated to 900° C. at a heating rate of 5° C. / min for heat treatment. The obtained lead zirconate titanate ceramic fiber has a single perovskite phase, a relatively flat and smooth surface, and a relatively fine structure.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pressure-transmitting heat-insulating medium microwave treatment method, comprising a microwave oven body (1), an inner crucible (4) and a gel fiber (5), characterized in that: A rotating heat preservation box (101) is fixedly connected to the bottom of the interior of the microwave oven body (1), a motor (102) is fixedly connected to the bottom of the interior of the rotating heat preservation box (101), a first gear (103) is fixedly connected to the output end of the motor (102), a rotating shaft (104) is rotatably connected to the bottom of the interior of the rotating heat preservation box (101) via a bearing, one end of the rotating shaft (104) rotates through the rotating heat preservation box (101) and is fixedly connected to a rotating frame (106), a second gear (105) is fixedly connected to the surface of the rotating shaft (104), the first gear (103) and the second gear (105) are meshed with each other, the inner crucible (4) is placed in the rotating frame (106), the gel fiber (5) is placed in the inner crucible (4), the four corners of the bottom of the microwave oven body (1) are fixedly connected to support blocks (3), and the side of the microwave oven body (1) is fixedly connected to a controller (2).

2. A microwave treatment method for a pressure transmission and heat preservation medium according to claim 1, characterized in that: The gel fiber (5) may be one of lead zirconate titanate gel fiber (5), lithium niobate gel fiber (5), barium titanate gel fiber (5), lead titanate gel fiber (5) and lead lanthanum zirconate titanate gel fiber (5).

3. The method for microwave treatment of a pressure transmission and heat preservation medium according to claim 1, characterized in that: The frequency of the microwave oven body (1) is 2450 MHz; the microwave power of pre-burning is 100-1000 W, and the pre-burning time is 10-60 min; the heat treatment is heated to 800-1100° C. at a heating rate of 3-5° C. / min, and the temperature is kept for 60-120 min.

4. The method for microwave treatment of a pressure transmission and heat preservation medium according to claim 1, characterized in that: The specific steps are as follows: Step 1: placing the gel fiber (5) into the inner crucible (4), and then placing the inner crucible (4) containing the gel fiber (5) into the microwave oven body (1) for pre-burning; Step 2: heat-treating the pre-burned fibers in a microwave oven body (1) to obtain ceramic fibers.

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