Method for preparing Ti2PbC ceramic by powder metallurgy method

Abstract

The invention relates to a method for preparing Ti2PbC ceramic by a powder metallurgy method. The method is as follows: proportioning ingredients according to the ratio of TiC: Ti: Pb= 1: 1: (1-1.3) (molar ratio), mixing for 1-50 hours, using a tube furnace to heat to 900 to1500 DEG C under a protective atmosphere in the heating rate of 1-50 DEG C / min, holding for 30-200Min, and cooling with the furnace to obtain the high-purity Ti2PbC ceramic. The synthesis method has many advantages: the synthesis time needed for the Ti2PbC ceramic is greatly shortened, a very high purity can be achieved, synthesis cost is low, equipment is simple, process parameters are large in range, and the method is suitable for industrial production. The obtained ceramic can be used in a transition layer of a lead acid battery, the cost of the ceramic is lower than that of a noble metal, and the ceramic has extremely excellent compatibility with graphite fiber and a lead-based active phase in the battery.

Description

technical field [0001] The invention belongs to the field of material preparation and relates to a preparation method of a metallic ceramic material. Background technique [0002] MAX phase refers to the general formula M n+1 AX n A new class of metallic ceramic materials, in which M is a transition group element, A is the third or fourth main group element, and X is carbon or nitrogen. The MAX phase combines the high electrical conductivity, high thermal conductivity, and easy processing of metal materials with the characteristics of high temperature resistance, corrosion resistance, and oxidation resistance of ceramic materials, as well as good self-lubricating properties, and has broad application prospects. [0003] Similar to other MAX, Ti 2 PbC has excellent electrical conductivity, thermal conductivity, and corrosion resistance, and has broad application prospects. For example, in the production of transition layers in lead-acid batteries, Ti 2 PbC has important ...

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Problems solved by technology

[0004] W.Jeitschko et al. (Monatshefte Für Chemie Und Verwandte TeileAndnderer Wissenschaftenl, 1964, 95 (2): 431-435) first discovered Ti2PbC in 1964, and determined its lattice constant a=3.222, c=13.994, but did not carry out its performance Research

Although Ti 2 PbC, but there are some problems in the preparation method: the preparation method is relatively complicated, the preparation process takes a long time, and the purity of the obtained Ti2PbC is not high

The sintering equipment used is relatively expensive, the cost is high, and the efficiency is low, which virtually increases the cost of preparing Ti2PbC powder, making it difficult for large-scale actual production

At the same time, the Ti prepared by this method 2 PbC powder contains TiC, titanium-lead compounds and other impurity phases, which have adverse effects on the electrical conductivity and oxidation resistance of components.

[0005] In the synthesis of high-purity, low-cost Ti 2 In terms of PbC ceramics, there are few reports at present

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