This document outlines 5 methods for preparing porous materials: space holder, replication, bubble generation, casting, and describes the space holder and replication methods in detail. The space holder method involves mixing metal powder with a space holder, compressing and sintering the mixture, then removing the space holder. The replication method coats a spongy material in slurry, then heats and sinters the mixture to obtain the final porous product.

1. Method of preparation of porous
material
Nimra Razzaq
2017-BME-34

2. Porous material
 The material having minute intersections through which liquid
or air may pass is called porous

3. Methods
 There are 5 method of preparations of porous material
 Space holder
 Replication
 Bubble generation
 casting

4. Space holder
 Space holder is a technique, in which metal powder is mixed
with space holder
 An intermediate is formed that is a mixture of space holder
and metal powder
 After mixing , compressed the mixture and after this remove
the space holder
 At final stage, sintered the material

6. Replication
 In this technique, spongy is mixed slurry
 Slurry coated around slurry
 After this, heating and sintering the mixture
 We obtained our desired product

7. Bubble generation
 In this technique, we mix argon gas with metal powder
 Heat the mixture
 Air is trapped due to heating
 Porous is formed

8. Thanks