1. Generate new page in ionic
Example: ionic g page about
2. create a button
HTML
<button ion-button (click)="openAboutPage()">Button</button>

3. app.module.ts
add your page to app module ( plz focus on Aboutpage)

4. TS file ( if you include your new button in home.html then do this changes in home.ts)
First, you have to import your page.
import { AboutPage } from '../about/about';
also don’t forget to add this to your constructor.
constructor(public navCtrl: NavController) { }
navigate application to particular page
openAboutPage(){
this.navCtrl.push(AboutPage);
}

Overview in Video
Click Her
Result