89 results about "Germanium oxide" patented technology

The present application discloses a semiconductor device and a method for fabricating the semiconductor device. The semiconductor device includes a substrate; a capping mask layer positioned on the substrate; a first gate insulating layer positioned along the capping mask layer, inwardly positioned in the substrate, and including a U-shaped cross-sectional profile; a first work function layer positioned on the first gate insulating layer; a first conductive layer positioned on the first work function layer; and a first capping layer positioned on the first conductive layer. The first capping layer includes germanium oxide. A top surface of the first capping layer and a top surface of the capping mask layer are substantially coplanar.

The invention provides a preparation method of small-particle-size high-purity germanium dioxide, and relates to the technical field of new material preparation, and the preparation method comprises the following steps: S1, preparation of a hydrolysis solution, S2, spraying hydrolysis of germanium tetrachloride, S3, low-temperature aging, S4, solid-liquid separation and washing, and S5, high-temperature drying. The germanium dioxide production process is simple, low in cost and efficient, and the product is small in particle size and good in uniformity.

The subject of the present disclosure provides the production of N-type or P-type or semi-insulating rutile germanium dioxide templates and thin films in order to obtain sun-blind photo detectors from optical systems in the ultraviolet (UV) wavelength, or to obtain UV light emitting diodes, or to produce semiconductor materials required for UV laser diode production, especially for use in the field of power electronics in the defence industry and / or in missile and aircraft tracking systems. The disclosure describes a system and a method for growing r-GeO2 (rutile germanium dioxide) template and thin films using the chemical vapour deposition (CVD) method.

The invention discloses tetragonal system germanium dioxide and a hydrothermal synthesis method thereof. According to the method, hexagonal crystal system germanium dioxide is taken as a raw material, a hydrothermal reaction is carried out in an acidic aqueous solution, and efficient conversion from a hexagonal crystal system to a tetragonal crystal system is realized by controlling the reaction temperature to be 120-240 DEG C, the reaction time to be 24-48 hours and the pH value to be 1-3. According to the preferable scheme, the raw materials are subjected to calcination pretreatment at the temperature of 500-600 DEG C, the yield of the tetragonal crystal phase can be remarkably increased, and the synthesis temperature can be reduced to 120 DEG C. According to the invention, stable synthesis of tetragonal system germanium dioxide is realized for the first time under the mild condition of 240 DEG C and below, and the technical problem that high-temperature transformation at 1000 DEG C or above is needed in the traditional method is solved. The tetragonal crystal system germanium dioxide prepared by the method is of a regular polyhedral structure, has the particle size of 400-500nm, and can be used as a high-efficiency catalyst for polyester synthesis. The process is energy-saving and environment-friendly, the total utilization rate of the raw materials is increased by recycling the waste liquid, and the process has remarkable industrial application value.

The invention belongs to the technical field of target materials, and discloses a multi-element doped indium germanium oxide ceramic target material and a preparation method thereof. The ceramic target material comprises indium oxide, germanium oxide and doped oxide, and the doped oxide is one or two of cerium oxide, hafnium oxide or titanium oxide; the preparation method comprises the following steps: mixing In2O3 powder, GeO2 and doped oxide powder, carrying out ball milling, drying, grinding and sieving on the mixed powder to obtain mixed oxide powder, sequentially carrying out compression molding and cold isostatic pressing on the mixed oxide powder to obtain a target material green body, putting the target material green body in an oxygen atmosphere, and carrying out sintering to obtain the target material. A multi-element doped indium germanium oxide ceramic target material is obtained by using a multi-stage sintering method; by adjusting the doping elements in the target material, the proportion of the doping elements and the staged sintering temperature and time, the density and the conductivity of the target material can be remarkably improved.

This utility model discloses a germanium dioxide drying device, including a housing. An electric heater penetrates the bottom surface of the housing. A material box is installed inside the housing, and a metal handle is installed on one end of the material box. An installation box is installed on the rear end of the housing. A breathable mesh is fixedly inserted through the upper part of the housing. A door is installed on the end face of the housing via hinges, and a heat exchange box is fixedly inserted through the end face of the door. A control panel is installed on one side of the housing. Two sets of installation covers are fixedly inserted through the end face of the installation box. A bidirectional lead screw is installed inside the installation box via bearings, and two sets of lead screw sleeves are fitted onto the side walls of the bidirectional lead screw. Each set of lead screw sleeves has a connecting plate fixedly fitted onto its side wall. Beneficial effects: This utility model uses an installation box, which facilitates the installation of the drying structure, bringing convenience to the installation of the germanium dioxide drying device.

The invention discloses a WS2 negative electrode material and a preparation method thereof, a negative electrode and a supercapacitor, and the preparation method comprises the following steps: S1, carrying out the hydrothermal synthesis reaction of tungsten disulfide and germanium dioxide, and obtaining a doped material; s2, germanium dioxide in the doped material is extracted through a solution etching extraction method, and a porous WS2 material is obtained; and S3, carrying out hydrothermal reaction on the porous WS2 material, a cross-linking agent and zirconium dioxide to obtain the modified WS2 negative electrode material. Through the porous structure, crosslinking and ZrO2 doping, the negative electrode material can maintain high specific surface area and has structural stability and high conductivity at the same time, so that the large-current charge-discharge performance of the supercapacitor is remarkably improved.

The invention discloses an IZO target material as well as a preparation method and application thereof. The IZO thin film comprises the following components in parts by weight: 75-90 parts of indium oxide; 10 to 25 parts of zinc oxide; 1-5 parts of germanium oxide; and 0.5 to 1.5 parts of silicon oxide. By doping germanium oxide and silicon oxide in a specific amount, the sheet resistance of the IZO thin film prepared from the IZO target material can be reduced, and the crystallization property of the IZO thin film at a high temperature can be inhibited. Due to the fact that glass network bodies GeO2 and SiO2 are added to inhibit crystallization of the IZO thin film at the high temperature, meanwhile, + 4 valence is doped into In2O3, the purpose of n-type doping can be achieved, the carrier concentration of IZO is increased, and the resistivity of the thin film is improved.

This invention belongs to the technical field of lithium-ion battery anode materials, specifically a method for preparing germanium-carbon nanocomposite materials for lithium-ion batteries using a hydrothermal method. The preparation method includes: adding germanium dioxide to a sodium hydroxide solution and stirring vigorously with a magnetic stirrer until the germanium dioxide is completely dissolved to obtain a clear sodium germanate solution; adding concentrated hydrochloric acid dropwise to the sodium germanate solution to form a white suspension, and then adding carbon nanotubes; placing the mixed solution in a hydrothermal reactor for hydrothermal reaction; repeatedly filtering and washing the material with anhydrous ethanol and ultrapure water; and finally vacuum drying to obtain the germanium-carbon nanocomposite material. This invention uses germanium dioxide and carbon nanotubes as raw materials to generate a nanostructured germanium-carbon composite material through a hydrothermal reaction. It does not use any binders or catalysts, has a simple and low-cost preparation process, and produces a material with stable performance, high energy density, and suitable for long-term storage, thus supporting the commercial application of germanium-based anode materials.

The invention discloses a morchella hypha powder prefabrication method and equipment line, belongs to the technical field of morchella hyphae, and solves the problems that morchella is extremely sensitive to continuous cropping, metabolite changes the soil microenvironment, hypha division and nutrient absorption are directly hindered, the hypha growth speed is reduced by 30%-50%, the biomass is reduced, and primordium formation is delayed. Comprising the following steps: S1, carrying out stress-resistant intensified culture on liquid strains; chitosan in a specific proportion in a liquid strain neutralizes dopamine quinone, antioxidant enzyme is induced to be improved, fat-soluble toxin is embedded in beta-cyclodextrin in a solid culture medium, dendrobium nobile residues adsorb water-soluble toxin, sodium selenite enhances oxidation resistance, germanium dioxide promotes hypha branching, an overburden filtrate degrades dopamine quinone, ash hydrolyzes related toxin, and the yield is increased. Pseudomonas compensates for beneficial metabolites and accelerates metabolism through temperature difference stimulation, so that hypha growth is accelerated, differential metabolites are reduced, biomass is increased, and the three-crop fruiting rate is stable.

This invention discloses a process for recovering germanium from germanium-silicon alloy waste, belonging to the field of germanium recovery technology. The process includes the following steps: S1. Oxidizing and roasting the germanium-silicon alloy waste to obtain roasted clinker; S2. Sulfidating and fixing the roasted clinker and pyrite to obtain activated clinker; S3. Leaching the activated clinker with sulfuric acid, followed by solid-liquid separation, and collecting the germanium-containing leachate; S4. Performing multi-stage countercurrent extraction on the germanium-containing leachate using an amine extractant to obtain a loaded organic phase; then back-extracting the loaded organic phase with an alkaline back-extraction solution to obtain a germanate solution; S5. Hydrolyzing and precipitating the germanate solution to obtain pure germanium dioxide. The roasting process of this invention fixes impurities and activates elemental germanium into soluble germanium dioxide. The purification stage efficiently separates germanium from other impurity ions, and the final hydrolysis precipitation controls product consistency. This invention's recovery process has high recovery efficiency and purity, is more environmentally friendly, and is expected to achieve large-scale production.

The present application relates to a kind of Ge-C composite mesophase carbon microspheres and its preparation method and application, biomass tar pitch and nanoscale germanium dioxide are added to raw oil, and Ge-C preliminary composite mesophase carbon microspheres are obtained by direct thermal polycondensation reaction;Linoleic acid is sprayed as sacrificial layer to its surface, and after pre-oxidation, nanometer Ge is attached to the surface of mesophase carbon microspheres, and a layer of amorphous carbon is attached to the outermost layer of surface, forming the mesophase carbon microspheres of the structure of core Ge / C composite-irregular carbon skeleton / Ge composite-inner surface-amorphous carbon layer structure on the surface.The present application uses cheap and easily available heavy oil as raw material, uses direct thermal polycondensation method and series modification, forms complete Ge / C composite mesophase carbon microspheres, has good conductivity, higher reversible specific capacity and rate performance, and can be stable after 200 cycles after being prepared into battery, the reversible capacity is as high as 1275 mAh / g after 200 cycles at 0.1C current density, and the reversible capacity is as high as 1162 mAh / g after 200 cycles at 1C current density.

Exemplary semiconductor processing methods may include providing a silicon-containing precursor to a processing region of a semiconductor processing chamber. A substrate may be disposed within the processing region of the semiconductor processing chamber. The methods may include forming a plasma of the silicon-containing precursor in the processing region and forming a first layer of material on the substrate. The first layer of material may include silicon oxide. The methods may include providing a germanium-containing precursor to the processing region of the semiconductor processing chamber and forming a plasma of the germanium-containing precursor in the processing region. Forming the plasma of the germanium-containing precursor may be performed at a plasma power of greater than or about 500 W. The methods may include forming a second layer of material on the substrate. The second layer of material may include germanium oxide.

The invention discloses an efficient sedimentation and recycling process based on germanium dioxide in hydrogen peroxide tail gas absorption liquid and application, and belongs to the technical field of industrial waste gas treatment and scattered metal recycling in the special gas industry. The process comprises the following steps: carrying out standing separation on hydrogen peroxide tail gas absorption liquid, and carrying out synergistic regulation on a sedimentation layer through pH and a composite flocculant to realize efficient sedimentation of germanium dioxide; dehydrating the germanium dioxide concentrated phase to form a filter cake, and carrying out three-stage countercurrent washing and staged heating drying to obtain a crude germanium dioxide solid product; the filtrate and the settled supernate are subjected to primary pH regulation, secondary membrane separation and adsorption and three-stage closed-loop hydrogen peroxide replenishing three-stage purification systems, so that efficient cyclic utilization of hydrogen peroxide is realized; the germanium dioxide recovery rate reaches 99% or above, the hydrogen peroxide recovery rate reaches 95%, the process cost is reduced by 40% or above, and the method has the advantages of being simple in process, high in resource recovery rate and low in operation cost and is suitable for treatment and resource utilization of germanium-containing tail gas in production of semiconductors, photovoltaic materials and special gases.

To provide a method for industrially advantageously producing a crystal excellent in crystallinity and useful for a semiconductor device, etc.SOLUTION: A method for producing a germanium dioxide crystal by crystal growth using a germanium-containing source material, wherein the source material contains antimony and the antimony content is 0.1 mol% or more and 10 mol% or less based on the source material, and the crystal is produced by heating the source material.SELECTED DRAWING: Figure 1

The invention relates to an improved synthesis process of a cesium germanium bromide halogen perovskite material. The improved synthesis process comprises the following reaction steps: (1) constructing a condensation reflux device and a nitrogen pipeline; (2) weighing germanium dioxide, hydrobromic acid, concentrated hypophosphorous acid and absolute ethyl alcohol; (3) putting the three-neck flask into an oil bath pan, and connecting a condensation reflux device and a nitrogen gas path; (4) after germanium dioxide is completely dissolved, the solution in the flask is clarified; (5) injecting the cesium bromide solution into the three-neck flask in a nitrogen environment, heating, and reacting for a period of time; (6) cooling the solution to room temperature in a nitrogen environment, and collecting a yellow cesium germanium bromide crude product; and (8) refining the crude cesium germanium bromide to obtain refined cesium germanium bromide, wherein the impurity content is lower than 0.5%. According to the method, the cesium-germanium bromide solution and methylbenzene are used, so that the problem that divalent germanium ions and cesium bromide are not completely reacted is solved, and a good solution is provided for synthesizing a high-purity cesium-germanium bromide material.

The invention provides a gold shell coated long-afterglow nano material for imaging photo-thermal and preparation and application of the gold shell coated long-afterglow nano material. The nano material comprises a Cr-doped zinc-gallium-germanium oxide long afterglow nano core, a mesoporous silica shell layer coated on the surface of the nano core and a gold shell layer coated on the outer surface of the mesoporous silica shell layer. The preparation method comprises the following steps: performing hydrothermal reaction and calcining to prepare a long afterglow nano core; the preparation method comprises the following steps: carrying out hydrolytic polycondensation on tetraethoxysilane (TEOS) under a cetyl trimethyl ammonium bromide (CTAB) template and an alkaline condition to form a mesoporous silica shell layer, removing the template and carrying out amination; adsorbing gold ions on the aminated surface, reducing the gold ions by using hydroboron to form gold seeds, and promoting growth by using hydroxylamine salt in a gold precursor solution containing carbonate to form a gold shell layer; the obtained nano material has near-infrared long-afterglow luminescence capability, generates photo-thermal temperature rise under 808 nm laser irradiation, and can be used for bacterial imaging and photo-thermal treatment of bacterial samples.

The application discloses a method for recovering germanium from germanium-containing fume by sulfuration leaching, which comprises the following steps: primary sulfuration leaching, secondary sulfuration leaching, germanium deposition by magnesium sulfate, and oxidizing roasting to obtain germanium oxide concentrate. The germanium-containing fume is leached by a sulfuration agent, so that the germanium is enriched without using expensive tannin or tannin extract commonly used in the prior art, and the production cost of germanium recovery is reduced. The method has the advantages of simple process, low production cost and suitability for large-scale production, and provides a new method for recovering germanium from germanium-containing materials.

The invention discloses a preparation method of metal germanium. The preparation method comprises the following steps: primary crushing of raw materials; a germanium-containing material is selected and put into a ball mill to be smashed; adding alkali and leaching; adding alkali into the crushed germanium-containing material for leaching; roasting is performed; the germanium-containing material obtained after leaching is put into a roasting furnace to be roasted till the germanium-containing material becomes yellow; performing secondary crushing; taking out the roasted germanium-containing material, and further crushing in a Raymond mill; performing chlorination distillation; putting the crushed germanium-containing material into a closed reaction kettle, introducing chlorine, and distilling to obtain germanium tetrachloride; performing secondary distillation; putting germanium tetrachloride obtained by distillation into a closed reaction kettle, and adding 2N hydrochloric acid for secondary distillation; performing hydrolysis; putting the germanium tetrachloride subjected to secondary distillation into a reaction kettle, adding pure water, hydrolyzing, filtering and drying to obtain germanium dioxide; performing reduction; putting germanium dioxide into a closed quartz boat, heating to 1100 DEG C, and adding hydrogen and oxygen for reduction to obtain a germanium ingot; melting into a strip shape; performing ultrasonic detection to obtain a finished product.

The invention discloses a Co-Ni bimetal sandwich polyacid crystalline material as well as a preparation method and application thereof. The molecular formula of the material is [Ni (L) 2 (H2O) 3] 2 [Co2Ni2 (GeMo10O36) 2 (H2O) 4]. 7.5 H2O. L is 1-(4-formyl benzyl)-[4, 4 '] bipyridine chloride; the crystal system is triclinic; the space group is P-1; the cell parameters are as follows: alpha is equal to 103.9140 (10) degrees, beta is equal to 91.5310 (10) degrees, gamma is equal to 119.2830 (10) degrees, and Z is equal to 1. The preparation method comprises the following steps: 1, dissolving germanium oxide, ammonium molybdate, a cobalt salt, a nickel salt and a ligand L in water, and regulating the pH value of the solution with an acid regulator to obtain a reaction solution; and 2, reacting the reaction liquid in the step 1 in a high-temperature closed environment, and cooling to room temperature after the reaction is finished, so as to obtain the Co-Ni bimetal sandwich polyacid crystalline material. According to the crystalline material synthesized by the method, polyacid molecules are directly connected with Co-Ni bimetal sites, electrons are directly transferred to the metal sites, and loss of the electrons is avoided, so that the catalytic performance is greatly improved.

A method for manufacturing a semiconductor device includes forming a plurality of fins on a substrate, wherein each fin of the plurality of fins includes silicon germanium. A layer of silicon germanium oxide is deposited on the plurality of fins, and a first thermal annealing process is performed to convert outer regions of the plurality of fins into a plurality of silicon portions. Each silicon portion of the plurality of silicon portions is formed on a silicon germanium core portion. The method further includes forming a plurality of source / drain regions on the substrate, and depositing a layer of germanium oxide on the plurality of source / drain regions. A second thermal annealing process is performed to convert outer regions of the plurality of source / drain regions into a plurality of germanium condensed portions.

The utility model relates to the technical field of waste gas recovery, and discloses a waste gas recovery system of a germanium dioxide reduction furnace, which comprises a waste gas treatment mechanism and a separation recovery mechanism, and the waste gas treatment mechanism comprises a first container tank and a second container tank. The waste gas treatment mechanism is composed of a first container tank and a second container tank, waste gas can sequentially pass through the two container tanks to be treated, targeted reactions can be conducted according to different components in the waste gas in the stage treatment mode, and the waste gas treatment effect is effectively improved. Sealing rings are arranged at the top and the bottom of the polymeric membrane, and slots matched with the sealing rings are formed in the upper mounting plate and the lower mounting plate, so that the polymeric membrane is stably mounted, meanwhile, the sealing rings can effectively prevent waste gas from leaking from mounting gaps, and an operator can conveniently and quickly open or close the fastening cover through the rotating plate; and parts in the tank can be conveniently mounted, maintained and replaced.

The energy-saving germanium dioxide preparation rectification device comprises a rectification tower, a raw material storage tank, a tower top condenser, a plate heat exchanger, a reboiler, a tubular heat exchanger and a man-machine interaction control cabinet, the top of the rectification tower is communicated with an upper guide pipe, and one end of the upper guide pipe is connected with the tower top condenser. The device has the beneficial effects that condensed heat released by the tower top condenser is conducted to the raw material storage tank through the plate heat exchanger, the germanium dioxide crude liquid to be rectified is preheated from normal temperature to 60-70 DEG C, the heating energy consumption of the germanium dioxide crude liquid entering the rectifying tower is reduced, the residual heat of the tower kettle reboiler is used for heating the rectified reflux liquid, the reflux liquid is heated to be close to the boiling point before entering the tower body, and the rectification efficiency is improved. Different from a'heating-condensation 'energy one-way loss mode of an existing device, a closed-loop heat exchange network of raw material preheating-rectification heating-condensation waste heat is designed, gradient utilization of condensation heat, raw material preheating and reflux heating is achieved, the heat recovery efficiency is improved by 40% or above, and therefore rectification energy consumption is remarkably reduced.

The application discloses an inorganic composite solid electrolyte and a preparation method thereof, and relates to the technical field of lithium batteries, and specifically discloses an inorganic composite solid electrolyte and a preparation method thereof. The preparation method of the inorganic composite solid electrolyte comprises the following steps: S1, mixing lithium salt, metal oxide A, metal oxide B and ammonium dihydrogen phosphate, wherein the metal oxide B is titanium oxide, and intermittent vibration ball milling is performed to obtain mixed powder; S2, adding lanthanum oxide and germanium oxide into the mixed powder obtained in the step S1, and continuing to perform intermittent vibration ball milling to obtain composite powder; and S3, performing low-temperature sintering on the composite powder obtained in the step S2, and pressing to obtain an inorganic composite solid electrolyte film layer. The preparation method can significantly improve the reaction activity and synergistic effect among raw materials by adopting two-step intermittent vibration ball milling and one-step low-temperature sintering, and the conductivity of the inorganic composite solid electrolyte and the lithium ion transmission performance and cycle life of the solid battery are improved, and meanwhile, no solvent is used in the preparation process, and the sintering cost is reduced.

The glass composition includes, as essential components, one or more of tungsten oxide (WO3), boron oxide (B2O3), lanthanum oxide (La2O3), niobium oxide (Nb2O5), titanium dioxide (TiO2), and zirconium oxide (ZrO2), and may optionally include yttrium oxide (Y2O3), barium oxide (BaO), calcium oxide (CaO), antimony oxide (Sb2O3), phosphorus oxide (P2O5), lead oxide (PbO), germanium oxide (GeO2), and other components. The glass composition is characterized by a high refractive index and a high transmittance in the blue light portion of the electromagnetic spectrum.

This invention belongs to the field of germane preparation technology, and provides a method and system for continuous production of germane. The invention involves mixing an alkali metal hydroxide, germanium dioxide, sodium borohydride, and water to form an alkaline feed solution. This alkaline feed solution is then added to a sulfuric acid solution, and the reaction is carried out under a protective atmosphere to obtain germane. The addition rate of the alkaline feed solution is 0.8~3.5 kg / h. This invention precisely controls the feed rate of the alkaline feed solution at 0.8~3.5 kg / h, thereby accurately controlling the reaction process, effectively removing the heat of reaction, successfully suppressing the rapid increase in temperature and pressure within the reaction system, and significantly reducing the occurrence of competing side reactions such as sodium borohydride hydrolysis. This improves the yield of germane synthesis while ensuring a smooth, efficient, and stable production process. This invention is a continuous process; for example, one batch can be produced in 12 hours, and two batches in 16 hours, greatly improving the synthesis efficiency of germane and making it suitable for industrial continuous production.

The application provides a kind of imaging photothermal gold shell coated long afterglow nanomaterial and its preparation and application.The nanomaterial includes Cr doped zinc-gallium-germanium oxide long afterglow nanometer core, mesoporous silica shell layer coated on the surface of the nanometer core and gold shell layer coated on the outer surface of the mesoporous silica shell layer.The preparation method includes: hydrothermal reaction and calcination to prepare long afterglow nanometer core;Under the condition of alkali, make tetraethyl orthosilicate (TEOS) hydrolysis and condensation to form mesoporous silica shell layer, remove template and carry out amination under cetyltrimethylammonium bromide (CTAB) template;Gold ions are adsorbed on the aminated surface and reduced to form gold seeds using borohydride, and gold shell layer is formed by promoting growth using hydroxylamine salt in a gold precursor solution containing carbonate.The obtained nanomaterial has near-infrared long afterglow luminescence capability, and generates photothermal heating under 808 nm laser irradiation, which can be used for bacterial imaging and photothermal treatment of bacterial samples.

A cyclic pre-cleaning technique may be used to clean the surfaces of a recess in which a deep trench isolation (DTI) structure is to be formed. The cyclic pre-cleaning technique may include performing one or more deposition and etch cycles to remove oxygen from the surfaces of the recess to reduce the oxygen concentration in the surfaces of the recess. A passivation layer may be formed in the recess after the cyclic pre-cleaning technique is used to clean the surfaces. The cyclic pre-cleaning technique may include the use of germanium (Ge) to bond with oxygen in the surfaces of the recess, which results in the formation of germanium oxide (GeO). The germanium oxide is removed, resulting in reduced oxygen concentration in the surfaces of the recess. The reduced oxygen concentration increases the quality of epitaxial growth of the passivation layer in the recess.

The utility model relates to a germanium ingot preparation system, which comprises a first push boat furnace, a second push boat furnace and a third push boat furnace, the second pusher furnace is used for melting and ingot casting the metal germanium to form a cast germanium ingot; and the zone melting furnace is used for performing zone melting on the cast germanium ingot to obtain a germanium ingot. The germanium ingot preparation system is compact in structure, continuous production and preparation of germanium ingots can be achieved, production efficiency can be improved, and cost can be reduced.

The application discloses energy-saving germanium dioxide preparation rectification device, including rectification tower, raw material storage tank, overhead condenser, plate heat exchanger, reboiler, tubular heat exchanger and man-machine interaction control cabinet, the top of rectification tower is connected with upper guide pipe, and the one end of upper guide pipe is connected with overhead condenser. Advantage: the application conducts the condensation heat released by overhead condenser to raw material storage tank through plate heat exchanger, preheats germanium dioxide crude liquid to be rectified from normal temperature to 60-70 DEG C, reduces the heating energy consumption of entering rectification tower, heats rectification reflux liquid by using the waste heat of tower kettle reboiler, makes the reflux liquid temperature rise to the vicinity of boiling point before entering tower body, reduces the heating load in tower, is different from the one-way energy loss mode of "heating-condensation" of prior art device, designs the closed loop heat exchange network of raw material preheating-rectification heating-condensation waste heat, realizes the cascade utilization of condensation heat and raw material preheating, reflux liquid heating, and the heat recovery efficiency is improved by more than 40%, so that the rectification energy consumption is significantly reduced.