CN101700975B

CN101700975B - Combined formula used for manufacturing zinc oxide resistor

Info

Publication number: CN101700975B
Application number: CN200910219071XA
Authority: CN
Inventors: 蒙晓记; 谢清云; 胡小定
Original assignee: China XD Electric Co Ltd
Current assignee: China XD Electric Co Ltd
Priority date: 2009-11-20
Filing date: 2009-11-20
Publication date: 2012-06-27
Anticipated expiration: 2029-11-20
Also published as: CN101700975A

Abstract

The invention relates to the field of the manufacture of zinc oxide resistors and discloses a combined product used for manufacturing a zinc oxide resistor. The combined formula comprises a basic assistant material comprising zinc oxide and an additive and an auxiliary assistant material comprising a bonding agent and a dispersant. The combined formula is characterized in that a plasticizer is introduced into the auxiliary assistant material, and the auxiliary assistant material taking the basic assistant material as a weight reference comprises 0.5-1% of polyvinyl alcohol PVA1799 or polyvinyl alcohol PVA5088 used as the bonding agent, 1-2% of polyethylene glycol PEG200 used as the plasticizer and 0.5% of CE64 used as the dispersant.

Description

A kind of combination product that is used for the ZnO resistors manufacturing

Technical field

The present invention relates to the manufacturing field of ZnO resistors, particularly a kind of combination product that is used for the ZnO resistors manufacturing.

Technical background

Along with the further raising of transmission line electric pressure; Through-current capability to zinc oxide arrester requires increasingly high; Therefore, also the through-current capability to corresponding ZnO resistors has proposed requirement, and a factor that influences the ZnO resistors through-current capability is the compactness of himself.

The inventor finds that during ZnO resistors was made, the performance of moulding idiosome was the key factor that influences the compactness of ZnO resistors self.In the idiosome moulding, exist the fragmentation of particle not thorough with distortion, make molding blank form the space in the trigonum of particle contact, perhaps exist hollow bead not broken, hollow hole still is retained in the molding blank; And these spaces or hollow hole part can not be excluded in the resistor disc sintering process fully.

Summary of the invention

The object of the present invention is to provide a kind of combination product that ZnO resistors is made that is used for, can in the idiosome forming process, reduce the space of the trigonum formation of particle contact, eliminate hollow bead, improve shaping block physique amount.

In order to achieve the above object, the present invention adopts following technical scheme to be achieved.

A kind of combination product that is used for the ZnO resistors manufacturing comprises: the base furnish that zinc oxide and additive are formed, and the auxiliary ingredients of bond and dispersant composition; It is characterized in that; Introduce plasticizer in the said auxiliary ingredients; Said auxiliary ingredients is that weight basis comprises with the base furnish: 0.5～1% PVAC polyvinylalcohol 1799 or PVAC polyvinylalcohol 0588 are as bond; 1～2% polyethylene glycol PEG200 is as plasticizer, and 0.5% CE64 is as dispersant.

Further characteristics of the present invention are: the molar percentage component of said base furnish is: Bi ₂O ₃: 0.5～0.7%, Sb ₂O ₃: 0.7～1.0%, MnCO ₃: 0.5%, Cr ₂O ₃: 0.5%, Co ₂O ₃: 0.5%, Si:1.0～1.5%, surplus is major ingredient ZnO.

The present invention has introduced plasticizer P EG-200 in auxiliary ingredients, and selects the agency and sales CE64 of Foshan Sima chemical industry Co., Ltd dispersant for use.For the present invention, plasticizer mainly reduces the glass transformation temperature of bond, makes particle become soft, and plasticity strengthens, thereby is beneficial to moulding.CE64 is a kind of ceramic dispersant special, is characterized in only adding trace, just can obtain than the better dispersion effect of common dispersants (like A15), and not react with PVA and aluminum nitrate.Simultaneously; The present invention selects for use PVA1799, PVA0588 to make bond respectively; Adopt the product of traditional production Zinc-oxide piezoresistor, carry out mixing granulation, and after carrying out moulding; Whether the compact density through observing molding blank, the particle deformation and the broken situation of layering and section have obtained the best introducing amount of the various compositions of bond system.

Embodiment

Contrast experiment's example 1:

(1) the molar percentage component according to base furnish is: Bi ₂O ₃: 0.7%, Sb ₂O ₃: 1.0%, MnCO ₃: 0.5%, Cr ₂O ₃: 0.5%, Co ₂O ₃: 0.5%, Si:1.5%, surplus is major ingredient ZnO, pulverizes, is mixed with base furnish, and takes by weighing 9 parts respectively, every part is 2Kg.

(2) with base furnish 2Kg weight basis, it is subsequent use to take by weighing auxiliary ingredients PVA1799, PEG, CE64 dispersant respectively according to following table 1.

Table 1

(3) divide 9 groups of experiments, mixed base batching and auxiliary ingredients are controlled slurry water and are divided into 30% respectively; Ball milling is 1 hour in sand mill, uses two fluids (air and slurry) spray drying tower granulation, moulding then; Observe Forming Quality and base substrate section, its result is as shown in table 2 below.

Table 2

Can find out that from table 2 result when the bond consumption is 0.5～1%, it is that plasticizer is selected PEG200 and consumption for use at 1～2% o'clock, no matter from the density of molding blank, or the distortion situation of section sees that effect is best.The PEG molecular weight increases, and plasticization effect weakens.

Contrast experiment's example 2:

(1) the molar percentage component according to base furnish is: Bi ₂O ₃: 0.5%, Sb ₂O ₃: 0.7%, MnCO ₃: 0.5%, Cr ₂O ₃: 0.5%, Co ₂O ₃: 0.5%, Si:1.0%, surplus is major ingredient ZnO, pulverizes, is mixed with base furnish, and takes by weighing 9 parts respectively, every part is 2Kg.

(2) with base furnish 2Kg weight basis, it is subsequent use to take by weighing auxiliary ingredients PVA0588, PEG, dispersing agent C E respectively according to following table 3.

Table 3

(3) divide 9 groups of experiments, mixed base batching and auxiliary ingredients are controlled slurry water and are divided into 30% respectively; Ball milling is 1 hour in sand mill, uses two fluids (air and slurry) spray drying tower granulation, moulding then; Observe Forming Quality and base substrate section, shown in following 4 tables of its result.

Table 4

Can find out that from table 4 result behind the use PVA0588, blank strength is general, the particle breaking capacity improves, and the plasticization effect of plasticizer has identical rule with contrast experiment's example 1, and promptly molecular weight is little; But when the bond consumption is 0.5～1%, it is 1～2% o'clock that plasticizer is selected PEG200 and consumption for use, and no matter from the density of molding blank, or the distortion situation of section sees that effect is best.

Claims

1. one kind is used for the combination product that ZnO resistors is made, and comprising: the base furnish that zinc oxide and additive are formed, and the auxiliary ingredients of bond and dispersant composition; It is characterized in that; Introduce plasticizer in the said auxiliary ingredients; Said auxiliary ingredients is that weight basis comprises with the base furnish: 0.5～1% PVAC polyvinylalcohol 1799 or PVAC polyvinylalcohol 0588 are as bond; 1～2% polyethylene glycol PEG200 is as plasticizer, and 0.5% CE64 is as dispersant; The molar percentage component of said base furnish is: Bi ₂O ₃: 0.5～0.7%, Sb ₂O ₃: 0.7～1.0%, MnCO ₃: 0.5%, Cr ₂O ₃: 0.5%, Co ₂O ₃: 0.5%, Si:1.0～1.5%, surplus is major ingredient ZnO.