CN108279146B - Pretreatment method for testing zinc oxide-based ceramic components - Google Patents
Pretreatment method for testing zinc oxide-based ceramic components Download PDFInfo
- Publication number
- CN108279146B CN108279146B CN201810087189.0A CN201810087189A CN108279146B CN 108279146 B CN108279146 B CN 108279146B CN 201810087189 A CN201810087189 A CN 201810087189A CN 108279146 B CN108279146 B CN 108279146B
- Authority
- CN
- China
- Prior art keywords
- zinc oxide
- sample
- pretreatment method
- filter screen
- powder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
- G01N2001/2866—Grinding or homogeneising
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Thermistors And Varistors (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a standardized pretreatment method for testing zinc oxide-based ceramic components, which comprises six procedures of rough sample cleaning, polishing, secondary cleaning, drying, crushing and alkali dissolution, wherein in each specific procedure, the components, the using amount and the time of a ceramic, the size and the quality of a rough sample, a polishing and grinding medium, the crushed granularity and the specific component proportion and the concentration of an alkali solution are definitely limited, so that the standardization and the high efficiency of pretreatment are realized, and the testing precision is improved.
Description
Technical Field
The invention belongs to the technical field of material analysis and test, and particularly relates to a pretreatment method for testing zinc oxide-based ceramic components.
Background
The zinc oxide ceramic is a semiconductor ceramic material prepared by adding proper dopants and the like into zinc oxide serving as a main crystal phase. The high-voltage-sensitive piezoelectric transformer has the characteristics of excellent nonlinear coefficient, wide voltage-sensitive voltage range (from a few tenths of volts to dozens of kilovolts), small voltage temperature coefficient, quick time response, small leakage current and the like. The main raw material is zinc oxide, and the adulterants include bismuth oxide, cobalt oxide, strontium oxide, titanium oxide and the like. Is manufactured by adopting a common electronic ceramic process. It can be used for making voltage-stabilizing element and overvoltage protection element in high-voltage circuit (for example, low-voltage piezoresistor in integrated circuit), and can also be used as lightning arrester.
The transparent conductive film is a film which can conduct electricity and has high transparency in a visible light range, and mainly comprises a metal film system, an oxide film system, other compound film systems, a polymer film system, a composite film system and the like. The metal film has good conductivity but poor transparency. The transparent conductive film is mainly used as a window material of a photoelectric device (such as an LED, a thin-film solar cell and the like). The doped zinc oxide ceramic is an important transparent conductive film, has a large forbidden band width, only absorbs ultraviolet light, does not absorb visible light, and is called as transparent. The common doped zinc oxide base ceramic comprises one or more of Al, Ga, In, Cr, Ti, Sn, Co and the like, and the electrical conductivity is 10-2Ω·cm-10-4The magnitude of omega cm, the transmittance is generally 65-90%.
The preparation of zinc oxide-based ceramics generally comprises two types of dry forming and wet forming. Dry forming includes cold isostatic pressing, hot press forming, etc., and wet forming includes slip casting, injection forming, coagulation forming, etc. The equipment used according to the different preparation processes comprises an atmospheric pressure sintering furnace, an oxygen sintering furnace, a vacuum sintering furnace, a hot pressing furnace, a hot isostatic pressing furnace and the like.
The component tests of the zinc oxide ceramic comprise a main component test (less than 35 percent) and a doping component test (less than 0.1 percent), and according to different preparation processes, the impurity components generally comprise heavy metal impurities such as Pb and Cd and impurities such as Si and Fe which influence the electrical property. The test method generally employs inductively coupled plasma atomic emission spectrometry (ICP-AES) and inductively coupled plasma mass spectrometry (ICP-MS) with respective accuracies of greater than about 50ppm and greater than about 1 ppm. However, the existing sample pretreatment method has the defect that the doping source and the impurity content are difficult to accurately measure.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for carrying out standardized treatment on a zinc oxide electronic ceramic sample, which realizes accurate measurement of doping source components and impurity content and is convenient for standardized management.
The complete technical scheme of the invention comprises the following steps:
a standardized pretreatment method for testing zinc oxide-based ceramic components comprises six procedures of rough sample cleaning, polishing, secondary cleaning, drying, crushing and alkali dissolution, wherein each procedure comprises the following specific steps:
(1) taking a Ga-doped zinc oxide ceramic crude sample, and carrying out ultrasonic cleaning on the crude sample by using a decontamination solvent, wherein the decontamination solvent comprises the following specific components: acetone: the stain removing oil accounts for 6:2:1.5, and the components are in volume ratio; the ratio of crude to decontaminant solvent used was 50g crude: 350ml of decontamination solvent, and the ultrasonic cleaning time is 2 minutes;
(2) after drying the washed rough sample, processing the rough sample into cubic regular samples of (10-15) mm by using SiC sand paper, wherein the mass of each sample is 4-15 g;
(3) and (3) carrying out ultrasonic cleaning on the crude sample by using 100ml of decontamination solvent for each sample obtained after polishing, wherein the decontamination solvent comprises the following specific components: acetone: the stain removing oil accounts for 6:2:1.5, and the components are in volume ratio; the ultrasonic cleaning time is 3 minutes;
(4) drying the cleaned sample in a forced air drying oven or a vacuum drying oven for 2 hours at 80 ℃;
(5) after drying, crushing the sample in a tungsten carbide cobalt mortar for 0.5-2 hours, and sieving for multiple times until the final granularity reaches 40-80 meshes;
(6) the method comprises the following steps of completely dissolving crushed powder by using a mixed solution with the concentration of 2mol/L, wherein the mixed solution is composed of potassium hydroxide, sodium peroxide, lithium metaborate and lithium tetraborate, the concentrations of the four components are 2mol/L, and the specific dosage is potassium hydroxide: sodium peroxide: lithium metaborate: lithium tetraborate ═ 1.5: 2: 1:1, and dissolving for 0.5-2 hours under ultrasonic wave to obtain clear transparent solution for ICP test of zinc oxide electronic ceramic.
Compared with the prior art, the invention has the advantages that:
1. compared with the prior art, the standardized pretreatment method for testing the zinc oxide electronic ceramic is provided, the standardization and the high efficiency of cleaning are realized by clearly limiting the components of the ceramic, the composition, the using amount and the time of the decontamination solvent, the decontamination solvent is utilized to the maximum extent, the sample is fully cleaned, and the waste and the environmental pollution caused by the excessive use of the solvent are avoided.
2. The size and the quality of the rough sample are specified in detail, so that the standardization of the next step of cleaning and crushing is facilitated.
3. The zinc oxide electronic ceramic is characterized in that the most suitable grinding and grinding medium is specifically defined, the hardness of the grinding and grinding medium is enough to finish the grinding and grinding process in a short time, and the inaccurate measurement result caused by impurity mixing can be avoided.
4. The crushed particle size is defined in detail, and the specific component proportion and concentration of the subsequent alkali solution are matched, so that the sample powder can be fully dissolved in a specified time, and the dissolving efficiency is improved.
Drawings
FIG. 1 is a schematic flow chart of the disclosed method.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in figure 1, the invention discloses a standardized pretreatment method for testing zinc oxide-based ceramic components, which comprises six procedures of rough sample cleaning, grinding, secondary cleaning, drying, crushing and alkali dissolution, wherein each procedure comprises the following specific steps:
(1) taking a Ga-doped zinc oxide ceramic crude sample, and carrying out ultrasonic cleaning on the crude sample by using a decontamination solvent, wherein the decontamination solvent comprises the following specific components: acetone: the stain removing oil accounts for 6:2:1.5, and the components are in volume ratio; the ratio of crude to decontaminant solvent used was 50g crude: 350ml of decontamination solvent, and the ultrasonic cleaning time is 2 minutes;
(2) after drying the cleaned rough sample, processing the rough sample into a cubic regular sample of 10mm by using SiC sand paper, wherein the mass of each sample is 5.6 g;
(3) and (3) carrying out ultrasonic cleaning on the crude sample by using 100ml of decontamination solvent for each sample obtained after polishing, wherein the decontamination solvent comprises the following specific components: acetone: the stain removing oil accounts for 6:2:1.5, and the components are in volume ratio; the ultrasonic cleaning time is 3 minutes;
(4) drying the cleaned sample in a forced air drying oven or a vacuum drying oven for 2 hours at 80 ℃;
(5) after drying, crushing the sample in a tungsten carbide cobalt mortar for 1 hour until the granularity reaches 60 meshes;
(6) the method comprises the following steps of completely dissolving crushed powder by using a mixed solution with the concentration of 2mol/L, wherein the mixed solution is composed of potassium hydroxide, sodium peroxide, lithium metaborate and lithium tetraborate, the concentrations of the four components are 2mol/L, and the specific dosage is potassium hydroxide: sodium peroxide: lithium metaborate: lithium tetraborate ═ 1.5: 2: 1:1, and dissolving for 1 hour under ultrasonic wave to obtain clear transparent solution for ICP test of zinc oxide electronic ceramic.
Meanwhile, the preparation method of the Ga-doped zinc oxide ceramic in the step (1) comprises the following steps:
weighing raw material powder with corresponding mass by using a digital electronic balance, and mixing to obtain composite powder, wherein the composite powder comprises ZnO powder and a doping source, the mass fraction of the ZnO powder In the mixed powder is 72%, the mass fraction of the doping source is 28%, and the doping source comprises In according to molar ratio2O3:Ga2O3:MgO:TiO2:ZrO2:Bi2O3＝1.2:1.5:0.8:1.2:0.3；
The purity of the composite powder is more than 99.99 percent, the average grain diameter of the composite powder is 0.8 mu m, and the grain diameter of D50 is 0.5 mu m;
mixing pure water, polyacrylic acid and N-N' dimethyl bisacrylamide in a proportion of 100: 3.5: 1.2, fully dissolving to form a premixed liquid.
0.05 wt% of JA-281 as a dispersant which was not remained after sintering was added to the premix.
Adding 50 wt% of the composite powder into the premixed liquid, placing the premixed liquid into a ball mill for ball milling for 30 minutes, then placing the rest composite powder into the ball mill for ball milling for 40 hours, and using zirconia balls as ball milling media in the ball mill for slurry. Preparing slurry with the powder volume content of 55% by ball milling, namely the solid phase content of the raw material powder in the slurry is 55%, and adjusting the pH value of the slurry to 9.5 by using pure ammonia water to obtain high-fluidity slurry with the viscosity of about 60-65 mPa.s. Then adding 0.3 wt% of n-octanol organic defoaming agent and 0.1 wt% of ammonium persulfate initiator, stirring and degassing for 15 minutes in a casting system under negative pressure, and casting into a mold.
And after the mold is poured, putting the mold filled with the slurry into a 50 ℃ air oven, and heating to promote the crosslinking and curing of the gel monomer. Demoulding the wet blank after curing, and drying for 30 hours at the temperature of 65 ℃ and the humidity of 80 percent, thereby obtaining the zinc oxide ceramic biscuit with high strength and no defect.
Heating the biscuit in a flowing air furnace for degumming, firstly heating the furnace to 300 ℃, keeping the temperature at the speed of not higher than 1 ℃/min and keeping the temperature for not less than 2 hours, then heating to 650 ℃, keeping the temperature for not less than 5 hours, and keeping the temperature at the speed of not higher than 1 ℃/min. And cooling to room temperature along with the furnace to obtain the degummed blank.
And (3) placing the degummed blank in a ventilation air furnace for sintering, firstly heating the furnace to 800 ℃, keeping the temperature at the speed of not higher than 1 ℃/min and keeping the temperature for not less than 2 hours, then heating to 1020 ℃, keeping the temperature for not less than 5 hours, and keeping the temperature at the speed of not higher than 1 ℃/min. And cooling to room temperature along with the furnace, and polishing the sintered body to manufacture the zinc oxide voltage-stabilizing element. By usingThe relative density measured by a drainage method is 98.7 percent, and the resistivity of the ceramic body measured by cutting a sample is 2 multiplied by 10-3Omega cm, even microstructure, and no ceramic oxygen deficiency problem caused by vacuum sintering.
In another preferred embodiment, the gating system of the invention further comprises a gel injection molding die, wherein the die comprises an inner core, an outer die, a die base plate, a fastening outer die bolt, a fastening inner core bolt, an outer die sealing ring, an inner core sealing ring, a bottom ejection ram, a filter screen and a filter screen handle. The outer mold is placed on the mold chassis, an outer mold sealing ring is arranged on the contact surface, and the outer mold and the chassis are fixed through fastening bolts to ensure no liquid leakage. The inner core is inserted into the center of the chassis of the die, an inner core sealing ring is arranged on the contact surface, and the inner core and the chassis are fixed through a fastening bolt, so that no liquid leakage is ensured. And (3) taking the inner wall of the outer die, the outer wall of the inner core and a space formed by the die base plate and the non-overlapped part as a die cavity, and injecting water-based slurry into the die cavity to form a ceramic tube green body. Generally, handles can be designed on the outer die, so that the die is convenient to carry. The inner core design is hollow structure, and the interior design handle further reduces weight, is convenient for loose core the operation such as. The bottom ram is provided with threads on the surface, can be rotatably arranged on the die chassis and is used for ejecting the inner core. When the filter screen is used, the filter screen is attached to the outer walls of the outer die and the inner core, and the filter screen lifting handle is driven by hands or a motor to lift the filter screen out slurry after the casting is finished. In particular, in the process of pulling the filter net out of the slurry, the pulling speed is determined by the following formula:
in the formula, V is a pulling speed, a is a speed correction coefficient, the value range is 5-20, H is the ratio of the height of the filter screen to the height of the die in the pulling process, the value range is 0< H <1, X is a solid phase ratio, the value range is 10< X <90, b is a solid phase ratio correction index, the value range is 0-2, V is the viscosity of slurry, the unit is mPa.s, c is a viscosity correction index, and the value range is 0-2.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (7)
1. A pretreatment method for zinc oxide-based ceramics is characterized by comprising the pretreatment of the preparation of the zinc oxide-based ceramics and the component test standardization,
the preparation method of the Ga-doped zinc oxide ceramic comprises the following steps: weighing raw material powder with corresponding mass, and mixing to obtain composite powder, wherein the mass fraction of ZnO powder In the composite powder is 72%, the mass fraction of a doping source is 28%, and the doping source component is In molar ratio2O3:Ga2O3:MgO:TiO2:ZrO2:Bi2O31.2:1.5:0.8:1.2: 0.3; mixing pure water, polyacrylic acid and N-N' dimethyl bisacrylamide in a proportion of 100: 3.5: 1.2, fully dissolving the components in a weight ratio to form a premixed solution; adding 0.05 wt% of JA-281 which has no residue after sintering and is taken as a dispersant into the premixed liquid; adding 50 wt% of composite powder into the premixed liquid, placing the premixed liquid into a ball mill for ball milling for 30 minutes, then placing the rest composite powder into the ball mill for continuous ball milling for 40 hours, preparing slurry with the powder volume content of 55% by ball milling, namely the solid phase content of raw material powder in the slurry is 55%, adjusting the pH value of the slurry to 9.5 by using pure ammonia water to obtain high-fluidity slurry with the viscosity of about 60-65mPa & s, then adding 0.3 wt% of n-octanol organic defoaming agent and 0.1 wt% of ammonium persulfate initiator, stirring and degassing for 15 minutes in a pouring system under negative pressure, and pouring into a mold; the mould include filter screen and filter screen handle, the filter screen attaches to the outer wall of external mold and inner core, drives the filter screen handle after the pouring is accomplished and carries out the thick liquids with the filter screen, at the in-process of carrying out the thick liquids with the filter screen, the speed of carrying and drawing is confirmed by the following formula:
in the formula, V is a pulling speed, a is a speed correction coefficient, the value range is 5-20, H is the ratio of the height of a filter screen to the height of a mold in the pulling process, the value range is 0< H <1, X is a solid phase rate, the value range is 10< X <90, b is a solid phase rate correction index, the value range is 0-2, V is the viscosity of slurry, the unit is mPa.s, c is a viscosity correction index, and the value range is 0-2;
the standardized pretreatment method for component test comprises six procedures of rough sample cleaning, polishing, secondary cleaning, drying, crushing and alkali dissolution, and specifically comprises the following steps:
step (1): taking a Ga-doped zinc oxide electronic ceramic crude sample, and carrying out conventional or ultrasonic cleaning on the sample by using one or more of decontamination solvents such as alcohol, acetone, stain removing oil and the like;
step (2): after drying the cleaned rough sample, processing the rough sample into a regular shape such as a cube or a cylinder by using diamond, silicon carbide, an alumina grinding wheel or sand paper or other grinding media;
and (3): cleaning the polished sample by one or more of decontamination solvents such as alcohol, acetone, stain removing oil and the like by conventional or ultrasonic cleaning;
and (4): drying the cleaned sample in a forced air drying oven or vacuum drying oven at 50-200 deg.C for 0.5-5 hr;
and (5): crushing the dried sample in a hard alloy mortar, and repeating the crushing for many times until the granularity reaches 40-80 meshes;
and (6): and (3) completely dissolving the crushed powder by using sodium hydroxide, potassium hydroxide, sodium peroxide, sodium carbonate, lithium metaborate, lithium tetraborate or a plurality of mixed solutions with the concentration of not less than 0.5mol/L to obtain a clear and transparent solution which can be used for the ICP test of the zinc oxide electronic ceramic.
2. The pretreatment method for zinc oxide-based ceramics according to claim 1, wherein in the step (1), the specific components of the decontamination solvent are ethanol: acetone: the stain removing oil accounts for 6:2:1.5, and the components are in volume ratio; the ratio of crude to decontaminant solvent used was 50g crude: 350ml of decontamination solvent, and the ultrasonic cleaning time is 2 minutes.
3. The pretreatment method for a zinc oxide-based ceramic according to claim 1, wherein in the step (2), the SiC sand paper is used to treat the rough sample into cubic regular samples of (10-15) mm, and the mass of each sample is 4-15 g.
4. The pretreatment method for zinc oxide-based ceramics according to claim 1, wherein in the step (3), each sample obtained after grinding is subjected to ultrasonic cleaning on a rough sample by using 100ml of a decontamination solvent, wherein the decontamination solvent comprises the following specific components: acetone: the stain removing oil accounts for 6:2:1.5, and the components are in volume ratio; the ultrasonic cleaning time was 3 minutes.
5. The pretreatment method for zinc oxide-based ceramics according to claim 1, wherein in the step (4), the cleaned sample is dried in a forced air drying oven or a vacuum drying oven at 80 ℃ for 2 hours.
6. The pretreatment method for zinc oxide-based ceramics according to claim 1, wherein in the step (5), the dried sample is pulverized in a tungsten carbide cobalt mortar for 0.5 to 2 hours and sieved for a plurality of times, and the final particle size reaches 40 to 80 meshes.
7. The pretreatment method for zinc oxide-based ceramics according to claim 1, characterized in that in the step (6), the crushed powder is completely dissolved by using a mixed solution with a concentration of 2mol/L, wherein the mixed solution is composed of potassium hydroxide, sodium peroxide, lithium metaborate and lithium tetraborate, the concentrations of the four components are 2mol/L, and the specific amounts are as follows: sodium peroxide: lithium metaborate: lithium tetraborate ═ 1.5: 2: 1:1, and obtaining a clear transparent solution for ICP test of zinc oxide electronic ceramic under ultrasonic wave for 0.5-2 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810087189.0A CN108279146B (en) | 2018-01-30 | 2018-01-30 | Pretreatment method for testing zinc oxide-based ceramic components |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810087189.0A CN108279146B (en) | 2018-01-30 | 2018-01-30 | Pretreatment method for testing zinc oxide-based ceramic components |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108279146A CN108279146A (en) | 2018-07-13 |
| CN108279146B true CN108279146B (en) | 2021-03-26 |
Family
ID=62805745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810087189.0A Active CN108279146B (en) | 2018-01-30 | 2018-01-30 | Pretreatment method for testing zinc oxide-based ceramic components |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108279146B (en) |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0347579B1 (en) * | 1988-06-01 | 1994-03-30 | Daimler-Benz Aerospace Aktiengesellschaft | Device having a specific support structure for receiving, analysing and treating samples |
| US6780617B2 (en) * | 2000-12-29 | 2004-08-24 | Chen & Chen, Llc | Sample processing device and method |
| JP2005053735A (en) * | 2003-08-04 | 2005-03-03 | Fuji Photo Film Co Ltd | Process for producing zinc sulfide particle |
| EP2008714A1 (en) * | 2007-06-19 | 2008-12-31 | BASF Catalysts LLC | Process for the preparation of a cobalt-zinc oxide Fischer-Tropsch catalyst |
| US20090221079A1 (en) * | 2008-02-28 | 2009-09-03 | Dionex Corporation | Sample pretreatment and extraction |
| CN102534498A (en) * | 2010-12-23 | 2012-07-04 | 海洋王照明科技股份有限公司 | Gallium-doped zinc oxide transparent conducting film, and preparation method and application thereof |
| CN102169091B (en) * | 2011-05-23 | 2012-06-06 | 同济大学 | Method for analyzing and measuring typical metal in circuit board of discarded electrical equipment |
| CN103543055A (en) * | 2013-10-25 | 2014-01-29 | 环境保护部华南环境科学研究所 | Pretreatment method for heavy metal element detection in solid sample and application of pretreatment method |
| KR101783332B1 (en) * | 2015-12-29 | 2017-10-10 | 주식회사 에이에스피 | Cleanlab system for trace elements analysis |
| CN105948500B (en) * | 2016-04-28 | 2018-03-20 | 攀枝花学院 | Frit for porcelain enamel, enamel slurry and its preparation method and application |
| CN106404482A (en) * | 2016-08-31 | 2017-02-15 | 大工（青岛）新能源材料技术研究院有限公司 | Pretreatment method for detection of silicon and aluminum contents in ceramics |
| CN106757017A (en) * | 2016-12-02 | 2017-05-31 | 陕西环珂生物科技有限公司 | A kind of preparation method of anti-oxidation glass ceramic coating |
| CN107024375B (en) * | 2017-06-05 | 2023-04-14 | 辽东学院 | Portable sample analysis pre-processor and use method |
| CN107655736B (en) * | 2017-09-26 | 2020-06-23 | 苏州莱铯科技有限公司 | Pretreatment method for laser analysis of inorganic elements in plant sample |
-
2018
- 2018-01-30 CN CN201810087189.0A patent/CN108279146B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108279146A (en) | 2018-07-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101367649B (en) | Voltage dependent resistor dielectric material of zinc oxide and method of manufacturing electrical resistor | |
| EP3566842B1 (en) | Method for preparing ceramic molded body for sintering and method for producing ceramic sintered body | |
| JP6911811B2 (en) | Manufacturing method of transparent ceramics for Faraday rotator | |
| CN103396121A (en) | Novel transparent glitter ceramic with garnet structure and preparation method thereof | |
| US10315957B2 (en) | Method for producing transparent alumina sintered body | |
| CN110483044B (en) | high-Q-value microwave dielectric ceramic and aluminum ultralow-temperature co-firing method and high-Q-value microwave dielectric ceramic preparation method | |
| CN111606703B (en) | Zinc oxide resistance card and preparation method and application thereof | |
| CN110372221A (en) | A kind of low-temperature co-fired ceramics green tape material and preparation method thereof | |
| CN101439966A (en) | Preparation of stannic oxide electrode ceramic material | |
| Hohenberger et al. | Sol-gel processing of varistor powders | |
| CN108046768B (en) | Gadolinium gallium aluminum scintillation ceramic double doped with rare earth ions and preparation method thereof | |
| CN113402284A (en) | Method for solving sintering cracking of soft magnetic ferrite | |
| CN108279146B (en) | Pretreatment method for testing zinc oxide-based ceramic components | |
| EP3208252B1 (en) | Methods of producing ceramic molded product and transparent sintered body | |
| CN105884345A (en) | High-voltage-gradient, low-residual-voltage and low-leakage-current ceramic and preparing method thereof | |
| CN1328212C (en) | Process for preparing ZnO-Bi2O3 series pressure-sensitive ceramic chamotte doped with rare-earth oxide | |
| CN104193320B (en) | A kind of Nanocrystalline Zno-based Varistor composite powder material and preparation method thereof | |
| CN108863347A (en) | A kind of microwave-medium ceramics and preparation method thereof | |
| CN105693235A (en) | High-permittivity microwave dielectric ceramic material and preparation method thereof | |
| CN102030522A (en) | Low-equilibrium temperature ZnO-Bi2O3 series voltage-sensitive ceramic dielectric | |
| CN110357607A (en) | A kind of MAS-LT composite microwave medium ceramic and preparation method thereof | |
| JP6885314B2 (en) | Manufacturing method of transparent ceramics for Faraday rotator | |
| CN101830694B (en) | High-purity stannic oxide electrode ceramic material and preparation method thereof | |
| JP5337073B2 (en) | Current-voltage nonlinear resistor and method for manufacturing the same | |
| CN104150898A (en) | Leadless piezoelectric ceramic material capable of being sintered at low temperature and preparation method of leadless piezoelectric ceramic material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |