CN106567128A - Electric conduction potassium titanate crystal whisker preparation method - Google Patents

Electric conduction potassium titanate crystal whisker preparation method Download PDF

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Publication number
CN106567128A
CN106567128A CN201610404418.8A CN201610404418A CN106567128A CN 106567128 A CN106567128 A CN 106567128A CN 201610404418 A CN201610404418 A CN 201610404418A CN 106567128 A CN106567128 A CN 106567128A
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potassium titanate
titanate crystal
crystal whisker
conductive
whisker
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CN106567128B (en
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邓昭平
周茜洋
杨倩
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Chengdu Univeristy of Technology
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Chengdu Univeristy of Technology
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    • CCHEMISTRY; METALLURGY
    • C30CRYSTAL GROWTH
    • C30BSINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B29/00Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
    • C30B29/10Inorganic compounds or compositions
    • C30B29/16Oxides
    • C30B29/22Complex oxides
    • C30B29/32Titanates; Germanates; Molybdates; Tungstates
    • CCHEMISTRY; METALLURGY
    • C30CRYSTAL GROWTH
    • C30BSINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B29/00Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
    • C30B29/60Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape characterised by shape
    • C30B29/62Whiskers or needles
    • CCHEMISTRY; METALLURGY
    • C30CRYSTAL GROWTH
    • C30BSINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B33/00After-treatment of single crystals or homogeneous polycrystalline material with defined structure

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Paints Or Removers (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

The invention provides an electric conduction potassium titanate crystal whisker preparation method, which is characterized by comprising: taking a potassium titanate crystal whisker, adding an appropriate amount of deionized water, adding electric conduction titanium dioxide powder according to a certain ratio, adding a tin salt, an antimony salt and diniobium pentaoxide according to a certain ratio under stirring, adding an appropriate amount of a reducing agent (zinc, magnesium, iron or a mixture thereof), carrying out a reaction for 60-180 min after adding the reducing agent, adjusting the pH value to 2-4 with ammonia water, separating with a centrifuge or suction filtration equipment to obtain the electric conduction titanium dioxide powder-adhering potassium titanate crystal whisker, washing 2 times, drying for 6-13 h at a temperature of 130-180 DEG C, and calcining for 2.0-5.0 h at a temperature of 220-350 DEG C to obtain the potassium titanate crystal whisker.

Description

A kind of preparation method of conductive potassium titanate crystal whisker
Technical field
The invention belongs to the preparation field of functional material, more particularly to a kind of preparation method of conductive potassium titanate crystal whisker.
Background technology
Potassium titanate crystal whisker has four kinds of crystal formations, generally uses K2O.nTiO2To represent its composition, wherein, n=1,2,4,6,8, it In structure and performance significant difference, wherein with the potassium titanate crystal whisker of six titaniums using more, potassium titanate crystal whisker has high resistance to It is hot, high-wearing feature, corrosion resistance, the characteristic such as low heat conductivity, in composite reinforcement, friction material, porous ceramicss, enhancing There is good application prospect in the fields such as alloy, heat insulation heat proof material, due to its good stability and the phase good with resin Capacitive also obtains extensive concern in paint field.Composite and high-end coating (such as high-end car paint) are in material property The performance need of radioprotective, antistatic and anti-shielding etc. is increasingly projected, therefore is had increasing need for crystal whisker materials and had electric conductivity.
The method for preparing conductive potassium titanate crystal whisker has various, may be summarized to be two big class:One class is the method with chemical plating One layer of conductive metal layer is plated on potassium titanate crystal whisker;Equations of The Second Kind is that one layer is coated on potassium titanate crystal whisker by methods such as salt hydrolysiss Antimony-doped stannic oxide (ATO) conductive layer.The shortcoming of first method is in plating process to pollute generation environment;Equations of The Second Kind The shortcoming of method is electrical conductivity be not as good as former.At present, the conductive potassium titanate crystal whisker for using both at home and abroad is usually to use second Prepared by method, China there is presently no the conductive potassium titanate crystal whisker manufacturing enterprise of a scale.Conductive potassium titanate crystal whisker exists Require to be usually resistivity 90-190 Ω m, whiteness (L-value) 68-89 using technical parameter on car paint.
Under study for action, it has been found that a kind of simple, low production cost, be easy to the conductive potassium titanate crystal whisker of upper scale.
The content of the invention
It is an object of the invention to provide a kind of method for preparing conductive potassium titanate crystal whisker, its principle is:To prepare Go out, resistivity is mixed antimony and mixes niobium Conductive Titanium Oxide Powder Material and adhere on potassium titanate crystal whisker for the tin ash of 1-5 Ω m, glues Attached dose is the elementary composition oxide of stannum, antimony and niobium or hydroxide, and through the heat treatment compared with low temperature, the final adhesive type that obtains is led Electric potassium titanate crystal whisker.It is an advantage of the current invention that:Resistivity can almost reach the level of Conductive Titanium Oxide Powder Material;Because increasing The amount of titanium elements is added, has made in system that titanium elements ratio improves, the ratio of potassium obtains relative reduction;Material cost and run into This is low, and process stabilizing is easy to upper scale.Have the disadvantage:Because conductive powder body is connected on whisker, makes whisker by the mode for adhering to Become unsmooth, adhesion layer be likely to it is uneven, but as long as technology controlling and process is good, can match with downstream product, ratio resistance rate Big conductive whiskers more have extensive market prospect.
It is that it contains alkali-metal potassium ion that potassium titanate is different from titanium dioxide, knowable to quasiconductor theory, monovalence Potassium ion will play a part of charge recombination center or charge trap here, it is very big to the Conductivity of quasiconductor, Therefore it can very high, be even insulation directly to coat product its resistivity of antimony-doped stannic oxide acquisition with potassium titanate crystal whisker Body, experiment proves the fact, and also the way it goes, and this is also the original of the conductive potassium titanate crystal whisker product that the country does not have resistivity low so far Cause.
The present invention is carried out according to the following steps:
(1) adhesion of the conductive powder body on potassium titanate crystal whisker
10 parts of potassium titanate crystal whiskers are taken by mass parts (following consumption is mass parts);Add 50 parts of deionized water (deionizations Water consumption affects little to product quality);The Conductive Titanium Oxide Powder Material of 2-15 parts, adds pink salt under agitation, if pink salt With SnCl4.5H2O counts addition 2.6-4.2 part;Antimonic salt is subsequently adding, if antimonic salt is with SbCl3Meter addition 0.13-0.39 part; Add niobium pentaoxide 0.1-0.5 parts;Be eventually adding reducing agent (zinc, magnesium, ferrum or their mixture, under same consumption, The selection of reducing agent is not affected on end product quality), if reducing agent addition 0.5-1.5 part 0.5-1.5 parts in terms of zinc, And to add start recording response time during reducing agent, after reaction 60-180 minutes, adjust pH value 2-4 scopes with ammonia, with from Scheming or pumping and filtering device obtain adhering to the potassium titanate crystal whisker of conductive titanium dioxide powder and (select centrifuge or pumping and filtering device not Affect product quality), remove, the adhesion conduction titanium dioxide of acquisition stand-by with the deionized water wash 2 times of 3-5 times of volume after filtrate The potassium titanate crystal whisker wet feed of titanium valve body is brown or light grey.Can also be with equipment replacement agitators such as Ball-stirring mill, ball mill Plus medium bead equipment realizes aforesaid operations.
The invention is contributed:1. the tin ash by prepared, resistivity for 1-5 Ω m mixes antimony Mix niobium Conductive Titanium Oxide Powder Material to adhere on potassium titanate crystal whisker, adhesive agent is the elementary composition oxide of stannum, antimony and niobium or hydrogen Oxide, these adhesive agent sheets fall within conductive material after processing the step of below, so the electric conductivity to system Affect little;2. add niobium element and reached two purposes, be that it has same doping effect and be conducive to face with antimony first Complexion changed is shallow, so its addition can reduce the consumption of antimony, product colour be shoaled favorably, secondly, general semi-conducting material Electrical conductivity has drift, and addition niobium plays Stabilization to conductivity readings;3. add reducing agent (zinc, magnesium, ferrum or they Mixture) to achieve the goal be, in order to pass through atomicity control principle, to make finally to burn till powder body system and oxygen vacancy occur, reduce high price Consumption of the compound state to n-type doping.
(2) adhere to the drying of conductive titanium dioxide powder body titanium potassium titanate crystal whisker
Potassium titanate crystal whisker wet feed to adhering to conductive titanium dioxide powder must be dried, and drying will be in 130 DEG C of -180 DEG C of models Enclosing is carried out, and general drying time 6-13 hours, the too low drying time of temperature are oversize, the too high electric conductivity that can affect product of temperature.
(2) roasting and crushing of predecessor wet feed
Product after drying is put into into cabinet-type electric furnace, is obtained to 220 DEG C of -350 DEG C of roasting 2.0-5.0 hours from room temperature Loose bulk conduction potassium titanate crystal whisker, crushes through jet mill and obtains conductive potassium titanate crystal whisker, and what this method was obtained leads Electric potassium titanate crystal whisker appearance color is the canescence with blue phase, and test shows 10 Ω cm-80 Ω cm of resistivity;Whiteness (L-value) 83- 88, the property such as draw ratio of whisker depends on the property of setting each other off of selected potassium titanate crystal whisker.
Description of the drawings
Fig. 1 is the scanning electron microscope (SEM) photograph of conductive potassium titanate crystal whisker prepared by embodiment 1.
Specific embodiment
Embodiment 1:Take 10 grams of potassium titanate crystal whiskers;Add 50 ml deionized waters;2 grams of Conductive Titanium Oxide Powder Material, Stirring is lower to add SnCl4.5H2O2.6 gram;It is subsequently adding SbCl30.13 gram;Add 0.1 gram of niobium pentaoxide;It is eventually adding zinc 0.5 gram, and to add start recording response time during zinc, after reacting 180 minutes, adjust pH value 2.4 with ammonia, use pumping and filtering device Obtain adhering to the potassium titanate crystal whisker of conductive titanium dioxide powder, again with the deionized water wash 2 of 5 times of filter cake volumes after removal filtrate Secondary stand-by, the potassium titanate crystal whisker wet feed to adhering to conductive titanium dioxide powder must be dried, and drying will be carried out at 130 DEG C, drying 13 hours time.The material of drying 5.0 hour is obtained into loose bulk conduction potassium titanate crystalline substance to 220 DEG C of roastings from room temperature Must, to crush through jet mill and obtain conductive potassium titanate crystal whisker, the conductive potassium titanate crystal whisker appearance color that this method is obtained is Canescence with blue phase, test show 21 Ω cm of resistivity;Whiteness (L-value) 87.
Embodiment 2:Take 10 grams of potassium titanate crystal whiskers;Add 50 ml deionized waters;5 grams of Conductive Titanium Oxide Powder Material, Stirring is lower to add SnCl4.5H23 grams of O;It is subsequently adding SbCl30.2 gram;Add 0.3 gram of niobium pentaoxide;It is eventually adding zinc 1 Gram, and to add start recording response time during zinc, after reacting 100 minutes, adjust pH value 3 with ammonia, obtained with pumping and filtering device The potassium titanate crystal whisker of adhesion conductive titanium dioxide powder, is treated for 2 times with the deionized water wash of 4 times of filter cake volumes after removing filtrate again With the potassium titanate crystal whisker wet feed to adhering to conductive titanium dioxide powder must be dried, and drying will be carried out at 150 DEG C, drying time 7 Hour.The material of drying 4.0 hour is obtained into loose bulk conduction potassium titanate crystal whisker, Jing to 300 DEG C of roastings from room temperature Cross jet mill crushing and obtain conductive potassium titanate crystal whisker, the conductive potassium titanate crystal whisker appearance color that this method is obtained is band blue phase Canescence, test show 18 Ω cm of resistivity;Whiteness (L-value) 84.
Embodiment 3:Take 10 grams of potassium titanate crystal whiskers;Add 50 ml deionized waters;10 grams of Conductive Titanium Oxide Powder Material, Stirring is lower to add SnCl4.5H24 grams of O;It is subsequently adding SbCl30.34 gram;Add 0.35 gram of niobium pentaoxide;It is eventually adding zinc 1.8 grams, and to add start recording response time during zinc, after reacting 160 minutes, adjust pH value 3.2 with ammonia, use pumping and filtering device Obtain adhering to the potassium titanate crystal whisker of conductive titanium dioxide powder, again with the deionized water wash 2 of 4 times of filter cake volumes after removal filtrate Secondary stand-by, the potassium titanate crystal whisker wet feed to adhering to conductive titanium dioxide powder must be dried, and drying will be carried out at 140 DEG C, drying 7.5 hours time.The material of drying 4.5 hour is obtained into loose bulk conduction potassium titanate to 340 DEG C of roastings from room temperature Whisker, crushes through jet mill and obtains conductive potassium titanate crystal whisker, the conductive potassium titanate crystal whisker appearance color that this method is obtained It is the canescence with blue phase, test shows 16 Ω cm Ω cm of resistivity;Whiteness (L-value) 83.
Embodiment 4:Take 10 grams of potassium titanate crystal whiskers;Add 50 ml deionized waters;13 grams of Conductive Titanium Oxide Powder Material, Stirring is lower to add SnCl4.5H23.8 grams of O;It is subsequently adding SbCl30.36 gram;Add 0.33 gram of niobium pentaoxide;It is eventually adding 1.1 grams of zinc, and to add start recording response time during zinc, after reacting 110 minutes, adjust pH value 3.1 with ammonia, set with sucking filtration The standby potassium titanate crystal whisker for obtaining adhering to conductive titanium dioxide powder, is washed with the deionization of 4 times of filter cake volumes after removing filtrate again Wash 2 times it is stand-by, to adhere to conductive titanium dioxide powder potassium titanate crystal whisker wet feed must dry, drying will be carried out at 160 DEG C, dry 6.5 hours dry time.The material of drying 4 hour is obtained into loose bulk conduction potassium titanate to 290 DEG C of roastings from room temperature Whisker, crushes through jet mill and obtains conductive potassium titanate crystal whisker, the conductive potassium titanate crystal whisker appearance color that this method is obtained It is the canescence with blue phase, test shows 19 Ω cm of resistivity;Whiteness (L-value) 85.
Embodiment 5:Take 10 grams of potassium titanate crystal whiskers;Add 50 ml deionized waters;7 grams of Conductive Titanium Oxide Powder Material, Stirring is lower to add SnCl4.5H24.1 grams of O;It is subsequently adding SbCl30.33 gram;Add 0.30 gram of niobium pentaoxide;It is eventually adding 1.0 grams of zinc, and to add start recording response time during zinc, after reacting 130 minutes, adjust pH value 3.0 with ammonia, set with sucking filtration The standby potassium titanate crystal whisker for obtaining adhering to conductive titanium dioxide powder, is washed with the deionization of 4 times of filter cake volumes after removing filtrate again Wash 2 times it is stand-by, to adhere to conductive titanium dioxide powder potassium titanate crystal whisker wet feed must dry, drying will be carried out at 160 DEG C, dry 6 hours dry time.The material of drying 4.5 hour is obtained into loose bulk conduction potassium titanate to 280 DEG C of roastings from room temperature Whisker, crushes through jet mill and obtains conductive potassium titanate crystal whisker, the conductive potassium titanate crystal whisker appearance color that this method is obtained It is the canescence with blue phase, test shows 125 Ω cm of resistivity;Whiteness (L-value) 88.

Claims (3)

1. a kind of method for preparing conductive potassium titanate crystal whisker, is characterized in that carrying out according to the following steps:Take 10 parts of potassium titanate crystal whiskers;Plus Enter 50 parts of deionized waters;The Conductive Titanium Oxide Powder Material of 2-15 parts, adds pink salt under agitation, if pink salt is with SnCl4.5H2O Meter addition 2.6-4.2 part;Antimonic salt is subsequently adding, if antimonic salt is with SbCl3Meter addition 0.13-0.39 part;Five are added to aoxidize Two niobium 0.1-0.5 parts;Be eventually adding reducing agent zinc (zinc, magnesium, ferrum or their mixture, under same consumption, reducing agent From not affecting on end product quality), if reducing agent addition 0.5-1.5 part in terms of zinc, and to add during reducing agent In the start recording response time, after reaction 60-180 minutes, pH value 2-4 scopes are adjusted with ammonia, with centrifuge or pumping and filtering device Obtain adhering to the potassium titanate crystal whisker of conductive titanium dioxide powder, remove the deionized water wash 2 times with 3-5 times of volume after filtrate, The potassium titanate crystal whisker wet feed of the adhesion conductive titanium dioxide powder of acquisition is brown or light grey, it is also possible to Ball-stirring mill, ball The equipment replacement agitator such as grinding machine adds medium bead equipment to realize aforesaid operations;Potassium titanate to adhering to conductive titanium dioxide powder Whisker wet feed is dried, and drying is carried out in 130 DEG C of -180 DEG C of scopes, drying time 6-13 hours, by the product after drying from room temperature It is warmed up to 220 DEG C of -350 DEG C of roasting 2.0-5.0 hours and obtains loose bulk conduction potassium titanate crystal whisker, through jet mill powder Broken to obtain conductive potassium titanate crystal whisker, the conductive potassium titanate crystal whisker appearance color that this method is obtained is the canescence with blue phase, test Show 10 Ω cm-80 Ω cm of resistivity;The properties such as whiteness (L-value) 83-88, the draw ratio of whisker depend on selected potassium titanate The property of setting each other off of whisker.
2. a kind of method for preparing conductive potassium titanate crystal whisker as claimed in claim 1, it is characterised in that addition niobium element reaches Two purposes, are that it has same doping effect and be conducive to lighter with antimony, so its addition can subtract first Lack the consumption of antimony, product colour shoaled favorably, secondly, the electrical conductivity of general semi-conducting material has drift, and addition niobium is to electricity Conductance reading plays Stabilization.
3. a kind of method for preparing conductive potassium titanate crystal whisker as claimed in claim 1, it is characterised in that addition reducing agent (zinc, Magnesium, ferrum or their mixture) to achieve the goal be, in order to pass through atomicity control principle, to make finally to burn till the appearance of powder body system Oxygen vacancy, reduces consumption of the high price compound state to n-type doping.
CN201610404418.8A 2016-06-12 2016-06-12 A kind of preparation method of conduction potassium titanate crystal whisker Expired - Fee Related CN106567128B (en)

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
CN110564392A (en) * 2019-09-06 2019-12-13 成都理工大学 Double-liquid type water plugging material for oil well and preparation method thereof
CN110791058A (en) * 2019-10-30 2020-02-14 张家港大塚化学有限公司 Preparation method of TPEE composite material
CN113517089A (en) * 2021-04-07 2021-10-19 浙江凯色丽科技发展有限公司 Light-colored three-dimensional conductive powder for powder coating and preparation method thereof
CN115785708A (en) * 2022-12-02 2023-03-14 天津博迈科海洋工程有限公司 Water-based inorganic zinc-rich shop primer containing multifunctional conductive whiskers and preparation method thereof

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Publication number Priority date Publication date Assignee Title
CN110564392A (en) * 2019-09-06 2019-12-13 成都理工大学 Double-liquid type water plugging material for oil well and preparation method thereof
CN110791058A (en) * 2019-10-30 2020-02-14 张家港大塚化学有限公司 Preparation method of TPEE composite material
CN113517089A (en) * 2021-04-07 2021-10-19 浙江凯色丽科技发展有限公司 Light-colored three-dimensional conductive powder for powder coating and preparation method thereof
CN115785708A (en) * 2022-12-02 2023-03-14 天津博迈科海洋工程有限公司 Water-based inorganic zinc-rich shop primer containing multifunctional conductive whiskers and preparation method thereof
CN115785708B (en) * 2022-12-02 2023-10-24 天津博迈科海洋工程有限公司 Water-based inorganic zinc-rich shop primer containing multifunctional conductive whiskers and preparation method thereof

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