A tungsten rod blank containing yttrium and its preparation method and application

Abstract

The invention discloses a tungsten rod blank containing yttrium and a preparation method and application thereof, and relates to the technical field of tungsten products. The tungsten rod blank containing yttrium is made of a tungsten alloy; the tungsten alloy includes yttrium oxide; the mass percentage of yttrium oxide in the tungsten alloy is 0.5% to 1.2%; the average grain size of the tungsten rod blank containing yttrium is 6000 grains / mm 2 The tungsten alloy of the present invention is prepared by adding yttrium element to tungsten. The yttrium element forms yttrium oxide as the second phase particles, which inhibits the growth of tungsten grains during sintering, obtains fine-grained alloys, and further realizes the control of the average grain size of the yttrium-containing tungsten rod blank, thereby producing high-strength tungsten alloy wire.

Description

Technical Field

[0001] The invention belongs to the technical field of tungsten products, and in particular is a tungsten rod blank containing yttrium and a preparation method and application thereof. Background Art

[0002] Pure tungsten has the characteristics of low-temperature brittleness, weak interface bonding strength, low recrystallization temperature, radiation hardening and embrittlement, etc., which limits the application of tungsten.

[0003] In the related art, the application scope of tungsten is expanded by adding rare earth oxides to tungsten; and the modification of rare earth oxides is generally carried out by a solid-solid mixing method; but this method cannot eliminate the agglomerates in the powder, the dispersion of rare earth oxides in the matrix is ​​not good, and the distribution of rare earth particles after mixing is extremely uneven, resulting in a low tensile strength of the final tungsten rod blank.

[0004] Therefore, the present invention provides a tungsten rod blank containing yttrium to solve the problems raised in the above background technology. Summary of the invention

[0005] The object of the present invention is to provide a tungsten rod blank containing yttrium to solve at least one aspect of the problems and defects raised in the above-mentioned background technology.

[0006] The present invention also provides a method for preparing the yttrium-containing tungsten rod blank.

[0007] The present invention also provides application of the yttrium-containing tungsten rod blank.

[0008] Specifically, the first aspect of the present invention provides a tungsten rod blank containing yttrium, wherein the tungsten rod blank containing yttrium is made of tungsten alloy;

[0009] The tungsten alloy includes yttrium oxide;

[0010] The mass percentage of yttrium oxide in the tungsten alloy is 0.5% to 1.2%;

[0011] The average grain size of the yttrium-containing tungsten rod blank is 6000 / mm 2 above.

[0012] According to one technical solution of the yttrium-containing tungsten rod blank of the present invention, at least the following beneficial effects are achieved:

[0013] The tungsten alloy of the present invention is prepared by adding yttrium element to tungsten. The yttrium element forms yttrium oxide as the second phase particles, which inhibits the growth of tungsten grains during sintering, obtains an alloy with fine grains, and further realizes the control of the average grain size of the yttrium-containing tungsten rod blank, thereby producing a high-strength tungsten alloy wire.

[0014] According to some embodiments of the present invention, the mass percentage of yttrium oxide in the tungsten alloy is 0.6% to 1.2%.

[0015] According to some embodiments of the present invention, the mass percentage of yttrium oxide in the tungsten alloy is 0.7% to 1.2%.

[0016] According to some embodiments of the present invention, the mass percentage of yttrium oxide in the tungsten alloy is 0.7% to 1.1%.

[0017] According to some embodiments of the present invention, the mass percentage of yttrium oxide in the tungsten alloy is 0.8% to 1.1%.

[0018] According to some embodiments of the present invention, the mass percentage of yttrium oxide in the tungsten alloy is 0.8% to 1.0%.

[0019] According to some embodiments of the present invention, the mass percentage of yttrium oxide in the tungsten alloy is 0.8% to 0.9%.

[0020] According to some embodiments of the present invention, the mass percentage of yttrium oxide in the tungsten alloy is 0.85% to 0.9%.

[0021] The present invention can improve the performance of the tungsten rod blank containing yttrium by increasing the yttrium oxide content.

[0022] According to some embodiments of the present invention, the yttrium oxide is yttrium trioxide (Y2O3).

[0023] According to some embodiments of the present invention, the average particle size of the yttrium oxide is below 200 nm.

[0024] According to some embodiments of the present invention, the average particle size of the yttrium oxide is 10 nm to 200 nm.

[0025] According to some embodiments of the present invention, the average particle size of the yttrium oxide is 10 nm to 150 nm.

[0026] According to some embodiments of the present invention, the average particle size of the yttrium oxide is 10 nm to 100 nm.

[0027] According to some embodiments of the present invention, the average particle size of the yttrium oxide is 10 nm to 50 nm.

[0028] According to some embodiments of the present invention, the average particle size of the yttrium oxide is 20 nm to 50 nm.

[0029] According to some embodiments of the present invention, the density of the yttrium-containing tungsten rod blank is 18.3 g / cm 3 above.

[0030] According to some embodiments of the present invention, the density of the yttrium-containing tungsten rod blank is 18.35 g / cm 3 above.

[0031] According to some embodiments of the present invention, the density of the yttrium-containing tungsten rod blank is 18.4 g / cm 3 above.

[0032] According to some embodiments of the present invention, the density of the yttrium-containing tungsten rod blank is 18.45 g / cm 3 above.

[0033] According to some embodiments of the present invention, the density of the yttrium-containing tungsten rod blank is 18.3 g / cm 3 ~18.5g / cm 3 .

[0034] The present invention controls the density of the yttrium-containing tungsten rod blank to make the tungsten grain structure uniform without abnormally grown grains, thereby further improving the tensile strength of the final product.

[0035] According to some embodiments of the present invention, the average grain size of the yttrium-containing tungsten rod blank is 7000 grains / mm 2 above.

[0036] According to some embodiments of the present invention, the average grain size of the yttrium-containing tungsten rod blank is 8000 grains / mm 2 above.

[0037] According to some embodiments of the present invention, the average grain size of the yttrium-containing tungsten rod blank is 6000 grains / mm 2 ~9000pcs / mm 2 .

[0038] The second aspect of the present invention provides a method for preparing the above-mentioned yttrium-containing tungsten rod blank, comprising the following steps:

[0039] S1, mixing the first tungsten powder and the yttrium-containing solution and then performing ultrasonic-assisted drying to obtain a pretreated tungsten powder;

[0040] S2, reducing the pretreated tungsten powder to obtain alloy powder;

[0041] S3, mixing the alloy powder and the second tungsten powder, cold isostatic pressing, preheating and sintering;

[0042] The sintering temperature is 2450°C to 2550°C.

[0043] According to one technical solution of the preparation method technical solution of the present invention, at least the following beneficial effects are achieved:

[0044] The preparation method of the present invention comprises the following steps: mixing a yttrium-containing solution and a first tungsten powder and then drying the mixture with the assistance of ultrasound. During the drying process, yttrium compound grains in the yttrium-containing solution will precipitate; under the action of ultrasound, the energy of the ultrasound acts on the grains, thereby breaking the grains, thereby increasing the number of nuclei and making the grains of the yttrium compound fully refined; at the same time, under the action of ultrasound, the agglomerated tungsten powder can also be effectively broken up, so that the tungsten particles can be refined.

[0045] The present invention also controls the organizational structure of the tungsten rod blank by controlling the sintering temperature, thereby producing a tungsten rod blank with a good organizational structure.

[0046] According to some embodiments of the present invention, the particle size of the first tungsten powder is 2 μm to 20 μm.

[0047] According to some embodiments of the present invention, the power of the ultrasound is 200W to 300W.

[0048] According to some embodiments of the present invention, the drying temperature is 100°C to 110°C.

[0049] According to some embodiments of the present invention, the drying time is 6 hours to 8 hours.

[0050] According to some embodiments of the present invention, the yttrium-containing solution is an yttrium nitrate solution.

[0051] According to some embodiments of the present invention, the molar concentration of the yttrium nitrate solution is 0.1 mol / L to 0.2 mol / L.

[0052] According to some embodiments of the present invention, the reduction temperature is 700°C to 800°C.

[0053] According to some embodiments of the present invention, the reduction time is 5 h to 7 h.

[0054] According to some embodiments of the present invention, the reducing atmosphere is hydrogen.

[0055] According to some embodiments of the present invention, the average particle size of the second tungsten powder is 2 μm to 2.5 μm.

[0056] According to some embodiments of the present invention, the mass ratio of the alloy powder to the second tungsten powder is 1:0.2-0.3.

[0057] According to some embodiments of the present invention, the cold isostatic pressing pressure is 150 MPa to 200 MPa.

[0058] According to some embodiments of the present invention, a rod-shaped compact is obtained after the cold isostatic pressing.

[0059] According to some embodiments of the present invention, the diameter of the rod-shaped compact is 20 mm to 25 mm.

[0060] According to some embodiments of the present invention, the unit weight of the rod-shaped compact is 2kg to 3kg.

[0061] According to some embodiments of the present invention, the unit weight of the rod-shaped green compact is 2 kg to 2.5 kg.

[0062] According to some embodiments of the present invention, the preheating consists of the following process:

[0063] The first stage of heating: from 20℃~30℃ to 1000℃~1100℃, the heating time is 8h~12h;

[0064] The first stage of heat preservation: keep warm at 1000℃~1100℃ for 0.5h~1.5h;

[0065] The second stage of heating: from 1000℃~1100℃ to 1700℃~1800℃, the heating time is 6h~8h;

[0066] The second stage of heat preservation: keep warm at 1700℃~1800℃ for 0.2h~0.8h;

[0067] The third stage of heating: from 1700℃~1800℃ to 2450℃~2550℃, the heating time is 1h~2h.

[0068] The present invention controls the temperature and time of the preheating process, thereby controlling the organizational construction process of the tungsten rod blank, thereby achieving control of the tensile strength of the finally prepared tungsten rod blank.

[0069] According to some embodiments of the present invention, the sintering atmosphere is a protective atmosphere.

[0070] According to some embodiments of the present invention, the protective atmosphere is hydrogen.

[0071] According to some embodiments of the present invention, the sintering time is 5 h to 8 h.

[0072] The third aspect of the present invention provides the use of the above-mentioned yttrium-containing tungsten rod blank in the preparation of tungsten wire.

[0073] According to some embodiments of the present invention, the wire diameter of the tungsten wire is less than 20 μm.

[0074] According to some embodiments of the present invention, the tensile strength of the tungsten wire is above 5800 MPa.

[0075] According to some embodiments of the present invention, the tensile strength of the tungsten wire is above 6000 MPa.

[0076] According to some embodiments of the present invention, the tensile strength of the tungsten wire is above 6200 MPa.

[0077] According to some embodiments of the present invention, the tensile strength of the tungsten wire is above 6400 MPa.

[0078] According to some embodiments of the present invention, the tensile strength of the tungsten wire is above 6500 MPa.

[0079] According to some embodiments of the present invention, the tensile strength of the tungsten wire is 5800 MPa to 7000 MPa.

[0080] According to some embodiments of the present invention, the yttrium-containing tungsten rod blank is used in the field of preparing cutting wires. DETAILED DESCRIPTION

[0081] The following will be combined with the embodiments to clearly and completely describe the concept of the present invention and the technical effects produced, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0082] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0083] If the specific conditions are not specified in the examples, the experiments were carried out under conventional conditions or conditions recommended by the manufacturer. If the manufacturers of the reagents or instruments are not specified, they are all conventional products that can be purchased commercially.

[0084] Example 1

[0085] This embodiment is a tungsten rod blank containing yttrium, and the tungsten rod blank containing yttrium is composed of the following components in mass fraction:

[0086] Y2O3 0.85% and W 99.15%.

[0087] The density of the yttrium-containing tungsten rod blank is 18.46 g / cm 3 ;

[0088] The average grain size of the yttrium-containing tungsten rod blank is 7600 / mm 2 ;

[0089] The average particle size of Y2O3 in the yttrium-containing tungsten rod blank is 31nm;

[0090] The yttrium-containing tungsten rod blank has a uniform structure;

[0091] The diameter of the yttrium-containing tungsten rod blank is 18.5 mm.

[0092] The preparation method of the yttrium-containing tungsten rod blank in this embodiment consists of the following steps:

[0093] S1. Doping:

[0094] Yttrium nitrate solution (molar concentration of 0.15 mol / L) and blue tungsten powder (particle size of 2 μm to 20 μm) are mixed, and after sufficient mixing (mixing time of 0.5 h), the blue tungsten doping solution is ultrasonically dried (drying temperature of 110° C., drying time of 7 h, ultrasonic power of 200 W) to obtain a doping material;

[0095] S2. Restore:

[0096] The doped material prepared in S1 is reduced (the reduction temperature is 700°C, the reduction time is 6 hours, and the reduction atmosphere is hydrogen) into alloy powder;

[0097] S3, solid-solid doping:

[0098] The alloy powder prepared in S2 and pure tungsten powder (average particle size of 2.3 μm, mass ratio of alloy powder to pure tungsten powder of 1:0.25) were placed in a powder batcher for mixing (mixing time of 6 h, rotation speed of 25 r / min) to obtain mixed alloy powder;

[0099] S4. Suppression:

[0100] The mixed alloy powder obtained in step S3 is cold isostatically pressed into a rod-shaped compact (single weight is 2.5 kg);

[0101] The pressure of cold isostatic pressing in this step is 200MPa;

[0102] S5. Sintering:

[0103] The rod-shaped compact prepared by S4 was heated and sintered (the atmosphere was hydrogen, the sintering temperature was 2500°C, and the sintering time was 7h) to obtain a yttrium-containing tungsten rod blank;

[0104] The heating procedure in this step is as follows:

[0105] The first stage of heating: from 20℃ to 1000℃, the heating time is 8h;

[0106] The first stage of heat preservation: keep warm at 1000℃ for 1h;

[0107] The second stage of heating: from 1000℃ to 1750℃, the heating time is 6h;

[0108] The second stage of heat preservation: keep warm at 1750℃ for 0.5h;

[0109] The third stage of heating: from 1800℃ to 2500℃, the heating time is 2h.

[0110] Example 2

[0111] This embodiment is a tungsten rod blank containing yttrium. This embodiment is a tungsten rod blank containing yttrium. The tungsten rod blank containing yttrium is composed of the following components in mass fraction:

[0112] Y2O3 0.5% and W 99.5%.

[0113] The density of the yttrium-containing tungsten rod blank is 18.31 g / cm 3 ;

[0114] The average grain size of the yttrium-containing tungsten rod blank is 7800 / mm 2 ;

[0115] The average particle size of Y2O3 in the yttrium-containing tungsten rod blank is 23nm;

[0116] The yttrium-containing tungsten rod blank has a uniform structure;

[0117] The diameter of the yttrium-containing tungsten rod blank is 18.5 mm.

[0118] The method for preparing the yttrium-containing tungsten rod blank in this embodiment is different from that in Embodiment 1 in that the amount of yttrium nitrate solution used is adjusted according to the doping amount.

[0119] Example 3

[0120] This embodiment is a tungsten rod blank containing yttrium, and the tungsten rod blank containing yttrium is composed of the following components in mass fraction:

[0121] Y2O3 0.7% and W 99.3%.

[0122] The density of the yttrium-containing tungsten rod blank is 18.45 g / cm 3 ;

[0123] The average grain size of the yttrium-containing tungsten rod blank is 7400 grains / mm 2 ;

[0124] The average particle size of Y2O3 in the yttrium-containing tungsten rod blank is 29nm;

[0125] The yttrium-containing tungsten rod blank has a uniform structure;

[0126] The diameter of the yttrium-containing tungsten rod blank is 18.5 mm.

[0127] The method for preparing the yttrium-containing tungsten rod blank in this embodiment is different from that in Embodiment 1 in that the amount of yttrium nitrate solution used is adjusted according to the doping amount.

[0128] Example 4

[0129] This embodiment is a tungsten rod blank containing yttrium, and the tungsten rod blank containing yttrium is composed of the following components in mass fraction:

[0130] Y2O 31% and W 99%.

[0131] The density of the yttrium-containing tungsten rod blank is 18.37 g / cm 3 ;

[0132] The average grain size of the yttrium-containing tungsten rod blank is 6800 / mm 2 ;

[0133] The average particle size of Y2O3 in the yttrium-containing tungsten rod blank is 47nm;

[0134] The yttrium-containing tungsten rod blank has a uniform structure;

[0135] The diameter of the yttrium-containing tungsten rod blank is 18.5 mm.

[0136] The method for preparing the yttrium-containing tungsten rod blank in this embodiment is different from that in Embodiment 1 in that: the amount of yttrium nitrate solution is used (the amount is adjusted according to the doping amount).

[0137] Example 5

[0138] This embodiment is a tungsten rod blank containing yttrium, and the tungsten rod blank containing yttrium is composed of the following components in mass fraction:

[0139] Y2O3 1.2% and W 98.8%.

[0140] The density of the yttrium-containing tungsten rod blank is 18.27 g / cm 3 ;

[0141] The average grain size of the yttrium-containing tungsten rod blank is 6300 grains / mm 2 ;

[0142] The average particle size of Y2O3 in the yttrium-containing tungsten rod blank is 58nm;

[0143] The yttrium-containing tungsten rod blank has a uniform structure;

[0144] The diameter of the yttrium-containing tungsten rod blank is 18.5 mm.

[0145] The method for preparing the yttrium-containing tungsten rod blank in this embodiment is different from that in Embodiment 1 in that: the amount of yttrium nitrate solution is used (the amount is adjusted according to the doping amount).

[0146] Comparative Example 1

[0147] This comparative example is a tungsten rod blank containing yttrium, and the tungsten rod blank containing yttrium is composed of the following components by mass fraction:

[0148] Y2O3 0.3% and W 99.7%.

[0149] The density of the yttrium-containing tungsten rod blank is 18.21 g / cm 3 ;

[0150] The average grain size of the yttrium-containing tungsten rod blank is 4800 grains / mm 2 ;

[0151] The average particle size of Y2O3 in the yttrium-containing tungsten rod blank is 21nm;

[0152] The uniformity of the structure of the yttrium-containing tungsten rod blank is poor;

[0153] The diameter of the yttrium-containing tungsten rod blank is 18.5 mm.

[0154] The preparation method of the yttrium-containing tungsten rod blank in this comparative example is different from that in Example 1 in that the amount of yttrium nitrate solution used is adjusted according to the doping amount.

[0155] Comparative Example 2

[0156] This comparative example is a tungsten rod blank containing yttrium, and the tungsten rod blank containing yttrium is composed of the following components by mass fraction:

[0157] Y2O3 1.5% and W 98.5%.

[0158] The density of the yttrium-containing tungsten rod blank is 18.17 g / cm 3 ;

[0159] The average grain size of the yttrium-containing tungsten rod blank is 3900 grains / mm 2 ;

[0160] The average particle size of Y2O3 in the yttrium-containing tungsten rod blank is 103nm;

[0161] The uniformity of the structure of the yttrium-containing tungsten rod blank is poor;

[0162] The diameter of the yttrium-containing tungsten rod blank is 18.5 mm.

[0163] The preparation method of the yttrium-containing tungsten rod blank in this comparative example is different from that in Example 1 in that the amount of yttrium nitrate solution used is adjusted according to the doping amount.

[0164] Comparative Example 3

[0165] This comparative example is a tungsten rod blank containing yttrium, and the tungsten rod blank containing yttrium is composed of the following components by mass fraction:

[0166] Y2O3 0.85% and W 99.15%.

[0167] The density of the yttrium-containing tungsten rod blank is 18.38 g / cm 3 ;

[0168] The average grain size of the yttrium-containing tungsten rod blank is 4900 grains / mm 2 ;

[0169] The particle size of Y2O3 in the yttrium-containing tungsten rod blank is 53nm;

[0170] The yttrium-containing tungsten rod blank has a uniform structure;

[0171] The diameter of the yttrium-containing tungsten rod blank is 18.5 mm.

[0172] The preparation method of the yttrium-containing tungsten rod blank in this comparative example is different from that in Example 1 in that:

[0173] The mass ratio of the alloy powder to the pure tungsten powder in step S3 is 1:0.1.

[0174] Comparative Example 4

[0175] This comparative example is a tungsten rod blank containing yttrium, and the tungsten rod blank containing yttrium is composed of the following components by mass fraction:

[0176] Y2O3 0.85% and W 99.15%.

[0177] The density of the yttrium-containing tungsten rod blank is 18.78 g / cm 3 ;

[0178] The average grain size of the yttrium-containing tungsten rod blank is 4800 grains / mm 2 ;

[0179] The average particle size of Y2O3 in the yttrium-containing tungsten rod blank is 0.6 μm;

[0180] The yttrium-containing tungsten rod blank has a uniform structure;

[0181] The diameter of the yttrium-containing tungsten rod blank is 18.5 mm.

[0182] The preparation method of the yttrium-containing tungsten rod blank in this comparative example is composed of the following steps: The difference from Example 1 is that step S5 is performed in the following manner:

[0183] The rod-shaped compact prepared by S4 was heated and sintered (the atmosphere was hydrogen, the sintering temperature was 2300°C, and the sintering time was 11 hours) to obtain a yttrium-containing tungsten rod blank;

[0184] The heating procedure in this step is as follows:

[0185] The first stage of heating: from 20℃ to 1000℃, the heating time is 8h;

[0186] The first stage of heat preservation: keep warm at 1000℃ for 1h;

[0187] The second stage of heating: from 1000℃ to 1800℃, the heating time is 6h;

[0188] The second stage of heat preservation: keep warm at 1800℃ for 2h;

[0189] The third stage of heating: from 1800°C to 2300°C, the heating time is 1h.

[0190] A series of tests were performed on the yttrium-containing tungsten rod blanks of Examples 1 to 5 and Comparative Examples 1 to 4: density measurement was performed to obtain the density of the sintered yttrium-containing tungsten rod blanks; grain size detection was performed to obtain the average grain size; and the yttrium-containing tungsten rod blanks were drawn to obtain tungsten wires (wire diameter of 20 μm), and the tensile strength of the tungsten wires was tested; the experimental results are shown in Table 1.

[0191] Table 1 Density, grain size and corresponding tungsten wire tensile strength of yttrium-containing tungsten rod blanks prepared in Examples 1 to 5 and Comparative Examples 1 to 4

[0192]

[0193] In summary, the tungsten alloy of the present invention is prepared by adding yttrium element to tungsten. The yttrium element forms yttrium oxide as the second phase particles, which inhibits the growth of tungsten grains during sintering, obtains an alloy with fine grains, and further realizes the control of the average grain size of the yttrium-containing tungsten rod blank, thereby producing a high-strength tungsten alloy wire.

[0194] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tungsten rod blank containing yttrium, characterized in that: The yttrium-containing tungsten rod blank is made of tungsten alloy; The tungsten alloy includes yttrium oxide; The mass percentage of yttrium oxide in the tungsten alloy is 0.5% to 1.2%; The average grain size of the yttrium-containing tungsten rod blank is 6000 / mm 2 above; The method for preparing the yttrium-containing tungsten rod blank comprises the following steps: S1, mixing the first tungsten powder and the yttrium-containing solution and then performing ultrasonic-assisted drying to obtain a pretreated tungsten powder; S2, reducing the pretreated tungsten powder to obtain alloy powder; S3, mixing the alloy powder and the second tungsten powder, cold isostatic pressing, preheating and sintering; The preheating process consists of the following steps: The first stage of heating: from 20℃~30℃ to 1000℃~1100℃, the heating time is 8h~12h; The first stage of heat preservation: keep warm at 1000℃~1100℃ for 0.5h~1.5h; The second stage of heating: from 1000℃~1100℃ to 1700℃~1800℃, the heating time is 6h~8h; The second stage of heat preservation: keep warm at 1700℃~1800℃ for 0.2h~0.8h; The third stage of heating: from 1700℃~1800℃ to 2450℃~2550℃, the heating time is 1h~2h; The sintering temperature is 2450°C to 2550°C; The first tungsten powder is blue tungsten powder; The second tungsten powder is pure tungsten powder.

2. The yttrium-containing tungsten rod blank according to claim 1, characterized in that: The average particle size of the yttrium oxide is below 200 nm.

3. The yttrium-containing tungsten rod blank according to claim 1, characterized in that: The density of the yttrium-containing tungsten rod blank is 18.3 g / cm 3 above.

4. The yttrium-containing tungsten rod blank according to claim 1, characterized in that: The drying temperature is 100°C to 110°C.

5. The yttrium-containing tungsten rod blank according to claim 1, characterized in that: The yttrium-containing solution is an yttrium nitrate solution.

6. The yttrium-containing tungsten rod blank according to claim 1, characterized in that: The reduction temperature is 700°C to 800°C.

7. The yttrium-containing tungsten rod blank according to claim 1, characterized in that: The cold isostatic pressing pressure is 150 MPa to 200 MPa.

8. Use of the yttrium-containing tungsten rod blank according to any one of claims 1 to 7 in the preparation of tungsten wire.

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