CN203545695U

CN203545695U - Microwave pressurizing synthesizing device

Info

Publication number: CN203545695U
Application number: CN201320681712.5U
Authority: CN
Inventors: 刘新保
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-11-01
Filing date: 2013-11-01
Publication date: 2014-04-16
Anticipated expiration: 2023-11-01

Abstract

The utility model relates to a microwave pressurizing synthesizing device. The microwave pressurizing synthesizing device comprises a furnace body, a furnace cover, a pressurizing device and a microwave heating system, wherein the inside of the furnace body is provided with a hearth, the pressurizing device comprises a hydraulic device, an upper pressure head, a lower pressure head, a mold and a pressure sensor, the upper pressure head, the lower pressure head and the mold are arranged in the hearth, and the periphery of the mold is wrapped by a heat-preserving material; the microwave heating system comprises microwave pipes, a transitional waveguide and a control device, the microwave pipes are connected with the transitional waveguide, the microwave pipes are uniformly distributed along the periphery of the furnace body, the transitional waveguide stretches into the hearth, the side surface of the furnace body is provided with a temperature measuring element stretching into a hearth mold, an output signal of the temperature measuring element is connected with the control device, and an output signal of the control device is connected with the microwave pipes. By adopting the microwave pressurizing synthesizing device, the uniformity and continuity of the intensity of the microwave field can be guaranteed, the temperature gradient in a sintered area can be maximally reduced, the structure is simple, the design is reasonable, and the heat efficiency is high; the oxidization loss and the microwave radiation of raw materials can be effectively prevented, and the synthesis heat efficiency and product quality can be improved.

Description

Microwave pressurization synthesizer

Technical field

The utility model relates to a kind of thermoelectric material synthesizer, particularly relates to a kind of microwave pressurization synthesizer of thermoelectric material.

Background technology

At present, thermoelectric material Mg ₂the preparation method of Si mainly contains scorification, mechanical alloying method, hot pressing and plasma discharging method and powder metallurgic method, the equal Shortcomings part of this several method, subject matter is Preparation equipment and complex process, the oxidational losses of raw material magnesium powder is serious, product purity and uniformity coefficient low, the Mg obtaining ₂the thermoelectric figure of merit ZT of Si base thermoelectricity material is low.Wherein discharge plasma sintering method is one of sintering technology more advanced for the preparation of functional materials, being widely used in quick, the higher-grade sintering of nano material, magneticsubstance, electronic material, fine ceramics, non-crystaline amorphous metal, Wimet and matrix material, is the Perfected process that new function material is produced.But discharge plasma sintering method generally adopts the type of heating of switching pulse direct current energising, need larger electric current just can make material self direct heating carry out sintering.The method is not only to the having relatively high expectations of thermoelectric material synthesis device, and the material bad to conductivity, cannot lead to super-high-current and complete sintering; Meanwhile, when large electric current arrives mould by electrode pressure head, electrode pressure head produces compared with large thermal losses and damaged, and can have the problems such as the vacuum-sealing that damages because mould is overheated on electrode pressure head.Therefore, be badly in need of existing pressurization synthesizer to improve.

Utility model content

The technical problems to be solved in the utility model: overcome the shortcomings such as thermoelectric material synthesizer costliness in prior art, significant loss are serious, a kind of simple in structure, reasonable in design, microwave pressurization synthesizer that thermo-efficiency is high is provided.

The technical solution of the utility model:

A kind of microwave pressurization synthesizer, comprise body of heater (4), bell (5), pressurizing device (1) and microwave heating system, body of heater (4) inside is burner hearth, bell (5) is placed in upper furnace, described pressurizing device (1) comprises hydraulic efficiency plant (1-1), seaming chuck (1-2), push-down head (1-3), mould (11) and pressure transmitter (1-4), seaming chuck (1-2), push-down head (1-3) and mould (11) are positioned at burner hearth, and mould (11) is enclosed with lagging material (10) around;

Microwave heating system comprises microwave tube (2), transition waceguide (3) and control device (8), microwave tube (2) is connected with transition waceguide (3), microwave tube (2) is evenly arranged along body of heater (4) surrounding, transition waceguide (3) stretches in burner hearth, body of heater (4) side is provided with the temperature element (6) stretching in burner hearth mould, the output signal of described temperature element (6) connects control device (8), and the output signal of control device (8) connects microwave tube (2).

Between described body of heater (4) and bell (5), be provided with closed shield circle (16), sealing shielding ring (16) consists of the copper mesh band micro-wave screening circle (13) of outer field rubber seal (12) and internal layer.

Described burner hearth is round shape, and bell (5) and furnace bottom (15) are spherical, and bell (5), furnace bottom (15) match with the upper and lower end of burner hearth respectively.

Described bell (5) or body of heater (4) are provided with and are communicated with the vision slit (7) of burner hearth and at least one group of air inlet, venting port (9).

Described microwave tube (2) is 16-32 root, and the power of every microwave tube is 0.8-0.9KW; Control device (8) adopts PLC sequence controller, and temperature element (6) adopts infrared thermometer or thermopair, the output signal access PLC sequence controller of temperature element (6).

Described body of heater (4) and bell (5) are stainless steel, and seaming chuck (1-2), push-down head (1-3) are made by alumina-ceramic; Described mould (11) is made by aluminum oxide, silicon carbide or graphite material.

Positive beneficial effect of the present utility model:

(1) microwave pressurization synthesizer of the present utility model, burner hearth is round shape, bell and furnace bottom are semisphere, guarantee homogeneity, the continuity of microwave field strength, can reduce to greatest extent the thermograde that is sintered region, simple in structure, reasonable in design, thermo-efficiency is high.

(2) microwave pressurization synthesizer of the present utility model, between body of heater and bell, be provided with the closed shield circle that rubber seal and copper mesh band micro-wave screening circle form, oxidational losses and the microwave radiation of building-up process Raw be can effectively prevent, the thermo-efficiency of building-up process and the purity of product and uniformity coefficient improved.

(3) the utility model adopts PLC to control microwave source, according to the processing requirement of material, rational sintering procedure is set, and in conjunction with different exerting pressure, guarantees the realization of optimised process.This device not only can be used for synthetic Mg ₂si thermoelectric material, also can be used to other similar material of synthesis technique.

Accompanying drawing explanation

Fig. 1 is the structural representation of the utility model microwave pressurization synthesizer;

Fig. 2 is the structural representation of closed shield circle in Fig. 1;

In figure, 1 is pressurizing device, and 2 is microwave tube, and 3 is transition waceguide, 4 is body of heater, and 5 is bell, and 6 is temperature element, and 7 is vision slit, 8 is control device, and 9 is air inlet, venting port, and 10 is lagging material, and 11 is mould, 12 is rubber seal, and 13 is copper mesh band micro-wave screening circle, and 14 is synthetic materials, 15 is furnace bottom, and 16 is closed shield circle, and 1-1 is hydraulic efficiency plant, 1-2 is seaming chuck, and 1-3 is push-down head, and 1-4 is pressure transmitter.

Embodiment

embodiment mono-: referring to Fig. 1, Fig. 2, a kind of microwave pressurization synthesizer, comprise body of heater 4, bell 5, pressurizing device 1 and microwave heating system, body of heater 4 inside are burner hearth, bell 5 is placed in upper furnace, pressurizing device 1 comprises hydraulic efficiency plant 1-1, seaming chuck 1-2, push-down head 1-3, mould 11 and pressure transmitter 1-4, and seaming chuck 1-2, push-down head 1-3 and mould 11 are positioned at burner hearth, and mould 11 is enclosed with lagging material 10 around; Synthetic materials 14 is housed in mould 11.

Microwave heating system comprises microwave tube 2, transition waceguide 3 and control device 8, microwave tube (2) is connected with transition waceguide (3), microwave tube 2 is evenly arranged along body of heater 4 surroundings, transition waceguide 3 stretches in burner hearth, and body of heater 4 sides are provided with the temperature element 6(temperature element stretching in burner hearth mould and are arranged on die surface, and contact with synthetic materials), the output signal of described temperature element 6 connects control device 8, and the output signal of control device 8 connects microwave tube 2.The power of every microwave tube is 0.8-0.9KW, and the quantity of microwave tube is 16-32 root, can select as required; Control device 8 adopts PLC sequence controller, and temperature element 6 adopts infrared thermometer or thermopair, the output signal access PLC sequence controller of temperature element.

Burner hearth is round shape, and bell 5 and furnace bottom 15 are spherical, and bell 5, furnace bottom 15 match with the upper and lower end of burner hearth respectively.Bell 5 or body of heater 4 are provided with and are communicated with the vision slit 7 of burner hearth and at least one group of air inlet, venting port 9.Body of heater 4 and bell 5 are stainless steel, and seaming chuck 1-2, push-down head 1-3 are made by alumina-ceramic; Mould 11 is made by aluminum oxide, silicon carbide or graphite.

The concrete operation step of this synthesizer:

(1) synthetic materials is put into mould, the seaming chuck 1-2 that is placed in burner hearth hydraulic efficiency plant 1-1 is upper, puts lagging material 10, puts rubber seal 12 and copper mesh band micro-wave screening circle 13 well, puts push-down head 1-3 well, covers bell 5 fixing;

(2) temperature element 6 is inserted to burner hearth inside; Vacuumize or pass into shielding gas; Compress seaming chuck, push-down head, set original pressure;

(3) power of setting Microwave Pretreatment, opens microwave, is warming up to gradually pretreatment temperature, insulation;

(4) set the pressure of secondary pressurized and microwave and add and be pressed into power, open microwave, be rapidly heated to synthesis temperature and synthesize;

(5) finally naturally cool to room temperature, release, obtains product.

embodiment bis-: with embodiment mono-, basic identical, difference is:

Between described body of heater 4 and bell 5, be provided with closed shield circle 16, closed shield circle 16 consists of the copper mesh band micro-wave screening circle 13 of outer field rubber seal 12 and internal layer.

Claims

1. a microwave pressurization synthesizer, it is characterized in that: comprise body of heater (4), bell (5), pressurizing device (1) and microwave heating system, body of heater (4) inside is burner hearth, bell (5) is placed in upper furnace, described pressurizing device (1) comprises hydraulic efficiency plant (1-1), seaming chuck (1-2), push-down head (1-3), mould (11) and pressure transmitter (1-4), seaming chuck (1-2), push-down head (1-3) and mould (11) are positioned at burner hearth, and mould (11) is enclosed with lagging material (10) around;

2. microwave pressurization synthesizer according to claim 1, it is characterized in that: between described body of heater (4) and bell (5), be provided with closed shield circle (16), sealing shielding ring (16) consists of the copper mesh band micro-wave screening circle (13) of outer field rubber seal (12) and internal layer.

3. microwave pressurization synthesizer according to claim 1, is characterized in that: described burner hearth is round shape, and bell (5) and furnace bottom (15) are spherical, and bell (5), furnace bottom (15) match with the upper and lower end of burner hearth respectively.

4. microwave according to claim 1 and 2 pressurization synthesizer, is characterized in that: described bell (5) or body of heater (4) are provided with and are communicated with the vision slit (7) of burner hearth and at least one group of air inlet, venting port (9).

5. microwave pressurization synthesizer according to claim 1 and 2, is characterized in that: described microwave tube (2) is 16-32 root, and the power of every microwave tube is 0.8-0.9KW; Control device (8) adopts PLC sequence controller, and temperature element (6) adopts infrared thermometer or thermopair, the output signal access PLC sequence controller of temperature element (6).

6. microwave pressurization synthesizer according to claim 1 and 2, is characterized in that: described body of heater (4) and bell (5) are stainless steel, and seaming chuck (1-2), push-down head (1-3) are made by alumina-ceramic; Described mould (11) is made by aluminum oxide, silicon carbide or graphite material.